20180124Avista to WNIDCL_Attachment E H1-19.PDF

1
Foreword
This book contains the Hydro One Safety Rules. It
supercedes the Hydro One Safety Rules issued in
2009. Please ensure that all copies of the Hydro
One Safety Rules 2009 are discarded and that this
one is used exclusively. All safety rules in this book
that apply to your job must be observed at all times.
This book is the product of a consultation between
Hydro One management, The Power Workers’ Union
and The Society of Energy Professionals. We believe
that the consistent application of the rules that have
been included, provides a strong base upon which
our goal of zero injuries can be achieved.
Included in the Hydro One Safety Rules are the
“Electrical Utility Safety Rules” (revised January,
2014) which contain those rules pertaining to
electrical work that were agreed to by Hydro One and
the Infrastructure, Health and Safety Association
(IHSA) and are formally recognized in regulation.
Be proud, passionate and uncompromising when it
comes to safety!
Carmine Marcello
President and CEO
Hydro One Inc.
Don MacKinnon,
President,
Power Workers’ Union
Keith Rattai
Hydro One Local Vice-
President,
The Society of Energy
Professionals
WNIDCL_PR_019(H1) Attachment E 1 of 176
2
© Hydro One Inc. – 2014
Notice
Neither Hydro One, nor any person acting on it’s
behalf, makes any warranty, express or implicit, with
respect to the use of any information, data,
procedures, practices or recommendations,
contained in this handbook; or assumes any liabilities
with respect to the use of, or for damages resulting
from the use of, any such information, data,
procedures or recommendations.
WNIDCL_PR_019(H1) Attachment E 2 of 176
3
Introduction
Your safety and the safety of your coworkers are
directly affected by the culture we create together
and the decisions each one of us makes each day.
Managing safety in a potentially hazardous
environment depends on all of us, on the systems,
tools and processes we put in place, and on a
commitment to ensuring the health and safety of
each and every employee.
There are no easy answers, quick fixes or shortcuts
in our business. What is important is having the
courage to stand up and speak out when something
is wrong. It is about getting involved. It is about
providing input, and always looking for ways to make
things safer.
Our Company is structured around a Health and
Safety program that puts employees first. Together,
through our Journey to Zero initiative, we are creating
a culture where injuries and near misses are
eliminated. The Occupational Health and Safety
Assessment Series (OHSAS) 18001 registration is a
significant milestone that further demonstrates our
Health and Safety policy commitment to
implementing and sustaining a world class Health
and Safety management system in pursuit of zero
injuries and illnesses.
This rulebook is a critical tool in ensuring that we live
up to the high standards we set for safety of our
people and an important means by which we
integrate safety into everything that we do.
WNIDCL_PR_019(H1) Attachment E 3 of 176
4
Carmine Marcello
President and CEO
Hydro One Inc.
Please take the time to read this very rulebook and
commit to all that it represents. In doing so, it is
important to understand the obligations you have to
ensuring your own safety and the safety of everyone
around you.
Our goal is that each and every one of you returns
safely to your family and friends at the end of each
workday.

Take care of yourselves and each other.
WNIDCL_PR_019(H1) Attachment E 4 of 176
5

Application
This Rule Book applies to all workers employed or
contracted by Hydro One.
The Electrical Utility Safety Rules (Section 1) and
Definitions as well as the Supplemental Rules for
Hydro One must be followed when your work is in
proximity to energized electrical apparatus. The
Supplemental Rules for IHSA do not apply to
Hydro One unless otherwise directed.
The Hydro One specific rules (Sections 2 to 9) are
to be followed at all times.
These rules are in addition to all other pertinent
Safety Rules, and are to be used to comply with
current Regulations made under the Ontario
Occupational Health and Safety Act and all other
applicable legislation.
WNIDCL_PR_019(H1) Attachment E 5 of 176
6 WNIDCL_PR_019(H1) Attachment E 6 of 176
7
Contents
Foreword ..................................................................1
Introduction ..............................................................3
Application ...............................................................5
Contents ...................................................................7
Index by Rule Number .............................................9
Electrical Utility Safety Rules for Ontario
Foreword ................................................................19
Application .............................................................20
EUSR Definitions ...................................................21
Electrical Utility Safety Rules .................................31
Hydro One Safety Rules
Introduction ............................................................87
Hydro One Definitions ............................................89
Section 2 – General Requirements ........................99
Section 3 – Falling Hazards .................................125
Section 4 – On-Road Vehicle Operations ............137
Section 5 – Off-Road Vehicle Operations ............143
Section 6 – Steam/Pressure Hazards ..................147
Section 7 – Fire & Explosion Hazards .................149
Section 8 – Confined Spaces ...............................157
Section 9 – Hazardous Agents ............................159

Appendix 1 ...........................................................163
Index ....................................................................165
WNIDCL_PR_019(H1) Attachment E 7 of 176
8 WNIDCL_PR_019(H1) Attachment E 8 of 176
9
Index by Rule Number
Electrical Utility Safety Rules
Section 1
100 General ..........................................................31
101 Employer’s Management of Rules .................31
102 Knowledge of Rules .......................................32
103 Personal Conduct ..........................................32
104 Physical and Other Limitations ......................32
105 Jewelry and Long Hair ...................................33
106 Authorization for Work ...................................33
107 Job Planning ..................................................33
108 Weather Conditions .......................................35
109 Operating Maps & Component Nomenclature ...36
110 First Aid ..........................................................36
111 Emergency Response ...................................37
112 Rescue Operations ........................................37
113 Arc Flash, Flame Resistant Protective
Equipment ......................................................38
114 Safe Conditions for Work ...............................40
115 Work on Isolated Circuits ...............................41
116 Work on Neutral Conductors, Buses and
Skywires ........................................................41
117 Establishment of Hold-Offs ............................41
118 Static Electricity and Induction .......................42
119 Use of Temporary Grounds ...........................43
120 Electrical-Testing Devices .............................44
WNIDCL_PR_019(H1) Attachment E 9 of 176
10
121 High-Voltage Testing ..................................... 45
122 Working Alone ............................................... 45
123 Aerial Devices/Boom Trucks ......................... 47
124 Raising and Lowering of Tools and Material .. 51
125 Switching Authorization ................................. 52
126 Switching Operations .................................... 53
IHSA Supplemental ....................................... 54
Hydro One Inc. Supplemental ....................... 54
127 Guarding and Safety Interlocking for Personnel
Protection ...................................................... 55
128 Apparatus to be Treated as Energized ......... 56
129 Safe Limits of Approach ................................ 57
130 Items in Direct Contact with Energized
Apparatus ...................................................... 66
131 Painting ......................................................... 66
132 Work on Energized Apparatus ...................... 67
133 Authorization for Live Line Work ................... 67
134 Inspection, Testing and Selection of Live Line
Tools, Protective Equipment & Aerial Devices .. 67
135 Rubber Glove Work ....................................... 71
IHSA Supplemental ....................................... 74
Hydro One Inc. Supplemental ....................... 76
136 Live Line Tool Work ...................................... 77
137 Barehand Work ............................................. 77
138 Stringing and Removing Conductors ............ 78
139 Hoists ............................................................ 79
140 Confined Spaces ........................................... 80
WNIDCL_PR_019(H1) Attachment E 10 of 176
11
141 Working on Cables and Associated Equipment ..81
142 Pulling Cable ..................................................83
143 Portable Ladders ...........................................83
144 Scaffolds ........................................................83
145 Overhead Conductor Insulation .....................85
146 Temporary Power Cables ..............................85
147 Cord-Connected Electrical Equipment ...........85
148 Mobile Transformers ......................................85
149 Backfeed ........................................................86
Hydro One Safety Rules
Section 2 – General Requirements
200 General ..........................................................99
201 Rule Authority, Departures, Interpretation
and Supplementary Instructions ...................99
202 Workers’ Knowledge of Rules .....................100
203 Personal Conduct ........................................100
204 Physical and Other Limitations ....................101
205 Clothing, Jewelry and Long Hair ..................101
206 Emergency Response .................................101
207 Safe Conditions for Work .............................102
208 Isolation, De-Energizing, Locking and Tagging
Practices ......................................................103
209 Guarding and Safety Interlocking for Personnel
Protection .....................................................104
210 Tools and Protective Equipment ..................105
211 Personal Protective Equipment ...................106
WNIDCL_PR_019(H1) Attachment E 11 of 176
12
212 Respiratory Protection ................................. 107
213 Cross-Connecting Dissimilar Systems ........ 108
214 Working Alone ............................................. 108
215 Work On or Around Water
(Including Ice Travel) ................................... 109
Vessel (Boat) Operation .............................. 111
Traveling on Ice ........................................... 111
216 Checking for Leaks in Equipment ............... 112
217 Painting ........................................................ 112
218 Abrasive Blasting Operations ....................... 112
219 Indoor Operation of Internal Combustion
Engines ....................................................... 113
220 Microwave Radiation ................................... 113
221 Ionizing Radiation ........................................ 114
222 Work Near Buried Services ......................... 114
223 Craning and Rigging ................................... 115
224 Temporary Barriers ..................................... 116
225 Power Tools ................................................ 117
226 Adverse Weather and Lightning .................. 117
227 Firearms in Corporation Vehicles ................ 117
228 Training and Qualifications ........................... 117
229 Job Planning ................................................ 118
230 Housekeeping .............................................. 119
231 Safety Meetings ........................................... 119
232 First Aid ........................................................ 120
233 Work Site Inspections .................................. 121
WNIDCL_PR_019(H1) Attachment E 12 of 176
13
234 Work Refusal and Work Stoppage ...............121
235 Incident Reporting and Investigation ............122
236 Contractor Safety ..........................................122
237 Visitors ..........................................................122

Section 3 – Falling Hazards
300 Fall Protection ...............................................125
301 Guardrails and Floor Opening Covers .........127
302 Raising and Lowering of Tools & Material ...128
303 Overhead Protection
– General Requirements ..............................129
304 Portable Ladders .........................................129
305 Scaffolds ......................................................133
306 Suspended Platforms (Swing stages,
boatswain [‘bosn’] chairs, floats and needle
beams) .........................................................135
Section 4 – On-Road Vehicle Operations
400 Legislation ....................................................137
401 Possession of a Valid Driver’s License ........137
402 Condition of Vehicle .....................................137
403 Driver Training .............................................138
404 Unauthorized Passengers ...........................139
405 Authorized Operation of Vehicles &
Equipment ....................................................139
406 Moving in Reverse .......................................139
WNIDCL_PR_019(H1) Attachment E 13 of 176
14
407 Load Charts and / or Data Plates for Vehicle-
Mounted Equipment .................................... 140
408 Headlights ................................................... 140
409 Roadway Work Operations ......................... 141
410 Adverse Weather and Fatigue .................... 141
411 Emergency Safety Equipment ..................... 141
Section 5 – Off-Road Vehicle Operations
500 Legislation ................................................... 143
501 Authorized Operation .................................. 143
502 Passengers ................................................. 144
503 Load Charts and /or Data Plates for Off-Road
Vehicle Mounted Equipment ....................... 144
504 Reference Manuals and Logs ..................... 145
Section 6 – Steam/Pressure Hazards
600 Regulations ................................................. 147
601 Approved Work Procedures ........................ 147
602 Safety and Relief Valves ............................. 147
603 Pipework and Pressure Vessel Integrity ..... 147
604 Pressure Leaks ........................................... 148
605 Ice Plugs ..................................................... 148
606 Cross-Connecting Pressure Systems ......... 148
607 Temporary Hook Ups .................................. 148
Section 7 – Fire & Explosion Hazards
700 Fire Safety ................................................... 149
WNIDCL_PR_019(H1) Attachment E 14 of 176
15
701 Inspection and Maintenance of Portable Fire
Extinguishers ...............................................149
702 Automatic Fire Suppression System
Hazards .......................................................150
703 Transportation and Use of Explosives .........150
704 Source of Ignition .........................................151
705 Batteries .......................................................151
706 Handling and Storage of Flammable and
Combustible Liquids ....................................152
707 Transportation of Flammable Liquids to and
from the Workplace ......................................152
708 Dispensing of Flammable Liquids ................153
709 Handling of Compressed Gases ..................153
710 Transportation of Compressed Gases .........154
711 Storage of Compressed Gases ...................156
Section 8 – Confined Spaces
800 Legislation ....................................................157
801 Confined Space Program ............................157
Section 9 – Hazardous Agents
900 Hazard Materials Management ....................159
901 Heat/Cold Stress ..........................................160
902 Noise Control ...............................................161
Appendix
Appendix 1 ............................................................163
Index .....................................................................165
WNIDCL_PR_019(H1) Attachment E 15 of 176
16 WNIDCL_PR_019(H1) Attachment E 16 of 176
17
Electrical Utility Safety Rules
WNIDCL_PR_019(H1) Attachment E 17 of 176
18 WNIDCL_PR_019(H1) Attachment E 18 of 176
19
Infrastructure, Health and Safety Association
FOREWORD
These safety rules (revised January 2014) are for the
purpose of preventing personal injury, illness and
property damage. However, be aware that the rules
expressed are minimum requirements for the
workplace and for public safety.
These rules were revised with input from key
stakeholders and the dedicated efforts of a Joint
Working Team made up of representatives from
Hydro One Inc. and the Infrastructure, Health and
Safety Association (IHSA) [formerly the Electrical &
Utilities Safety Association of Ontario (E&USA)].
The Electrical Utility Safety Rules are a reflection of
the experience of the membership and others of the
industry, and the knowledge to identify, eliminate and
control hazards and prevent injuries and illnesses.
In addition to these rules, the current Ontario
Occupational Health and Safety Act (OHSA) and
Regulations outline specific duties and
responsibilities of employers and workers. These
safety rules must be used in conjunction with existing
federal and provincial health and safety regulations.
WNIDCL_PR_019(H1) Attachment E 19 of 176
20
Application
The following safety rules have been designed
primarily for work in the electrical utility industry.
However, the rules apply equally well to any work
performed on or in proximity to electrical transmission
or distribution systems or apparatus. These rules are
in addition to all other pertinent safety rules, and are
to be used to comply with current Regulations made
under the Ontario Occupational Health and Safety
Act and all other applicable legislation.
Al Beattie,
President, CEO
IHSA
Carmine Marcello
President, CEO
Hydro One Inc.
WNIDCL_PR_019(H1) Attachment E 20 of 176
EUSR Definitions 21
EUSR Definitions
Alive
See “Energized.”
Apparatus
All equipment pertaining to the generation,
transmission, distribution and use of electricity.
Approved
A device or method that has been evaluated and
selected from alternatives that meet the specific
requirements of the job.
Approved Practice NEW
A trade skill or work procedure used in situations
where isolation of energy sources is not used. It can
only be used to provide safety for the person who is
exercising the approved practice.
Skills are developed from a combination of
education, training and experience. Approved
practices are normally documented in training
material, trade handbooks or work methods
instructions.
Approved Work Procedure(s)
An approved, documented, step-by-step method that
ensures the task can be performed safely.
Arc Flash
A dangerous condition associated with the release of
energy caused by an electric arc.
WNIDCL_PR_019(H1) Attachment E 21 of 176
22 EUSR Definitions
Authorized Worker
A worker who has been given formal permission by
the owner and employer and is competent to
perform work in proximity to energized apparatus.
Bonded NEW
Electrically connected to ensure that two or more
objects are at the same potential.
Bonding (electrical)
Making a mechanically secure electrical connection
between two or more objects to ensure they are at
the same potential.
Cable(s)
All insulated conductors used for transmitting or
distributing electrical energy.
Certified Insulated Aerial Device REV 01/14
An aerial device that has successfully passed dielectric
testing of the insulated portion of the boom, as
prescribed by a certified laboratory.
Certified Laboratory
A laboratory that has received certification from a
governing agency, and has established specific
testing standards for electrical equipment, tools and
protective equipment.
WNIDCL_PR_019(H1) Attachment E 22 of 176
EUSR Definitions 23
Charged
Isolated but not de-energized; containing stored
energy. Electrical equipment not physically
connected to a source of energy may still be
charged through induction or capacitance.
Competent Person
A person who,
a) is qualified because of knowledge, training and
experience to organize work and its performance;
b) is familiar with the provisions of the Occupational
Health and Safety Act and the Regulations that
apply to the work; and
c) has knowledge of any potential or actual danger
to health or safety in the workplace.
Competent Worker
In relation to specific work, means a worker who,
a) is qualified because of knowledge, training and
experience to perform the work;
b) is familiar with the Occupational Health and
Safety Act and with the provisions of the
Regulations that apply to the work; and
c) has knowledge of all potential or actual danger to
health or safety in the work.
Conductor
That part of a cable, overhead line or apparatus
intended to conduct the flow of electrical energy.
WNIDCL_PR_019(H1) Attachment E 23 of 176
24 EUSR Definitions
Confined Space(s)
A fully or partially enclosed space,
a) that is not both designed and constructed for
continuous human occupancy; and
b) in which atmospheric hazards may occur because
of its construction, location or contents or
because of work that is done in it.
Controlling Authority REV 01/14
The person (s) who occupies a position responsible
for the control of specific equipment and devices.
This includes the responsibility for performing,
directing or authorizing changes in the conditions or
in the position of the equipment or devices.
Critical Hazard NEW
A condition that has the potential for unwanted
energy flow that may result in an injury to a worker
or the public.
Dedicated Observer
A worker competent in the tasks being performed
and having no other duties while monitoring the work
continuously.
De-Energized
Where electrical energy has been discharged
through a mechanically secure connection to an
effective ground potential.
WNIDCL_PR_019(H1) Attachment E 24 of 176
EUSR Definitions 25
Dynamically Alive
Connected (that is, not isolated) to a source of
energy such as an electrical generator, storage
battery, or other source of electrical energy.
Emergency
A situation, that requires immediate action to prevent
serious adverse effects on the health and safety of
employees, the public or the environment. An
emergency may be the result of uncontrolled
explosions, fires, releases of hazardous materials or
natural disasters.
Emergency Response Plan
A documented and communicated process designed
to ensure a safe environment for all workers and the
public to be used when responding to a specific
emergency.
Employer
A person who employs or contracts the services of
one or more workers.
Energized
Capable of delivering energy by reason of being
dynamically alive or charged.
Equipotential REV 01/14
Where no differences in electrical potential exist.
Equipotential Zone NEW
A work area where no differences in electrical potential exist.
WNIDCL_PR_019(H1) Attachment E 25 of 176
26 EUSR Definitions
Flame Resistant (FR)
The property of a material whereby combustion is
prevented, terminated, or inhibited following the
application of a flaming or non-flaming source of
ignition, with or without subsequent removal of the
ignition source.
Flame resistance can be an inherent property of a
material, or it can be imparted by a specific
treatment applied to the material.
FRP
Fibre Reinforced Plastic.
Grounded NEW
See “De-energized”.
Hazard NEW
A source of energy that may affect the safe work
area.
Hold-Off REV 01/14
A device having its operation restricted to previously
agreed limits by the placement of a hold-off tag.
Hold-offs are most commonly used to block the
automatic reclosing or the manual re-energization of
a line following an automatic trip.
Hold-offs are for equipment protection and must not
be used in place of a work permit.
WNIDCL_PR_019(H1) Attachment E 26 of 176
EUSR Definitions 27
Holder REV 01/14
The person who has accepted the Work Permit or
Supporting Guarantee and therefore has attained
working and/or testing rights for the work group. The
Holder is assigned responsibilities for ensuring that
everyone in the work group is protected from the
viewpoint of the Utility Work Protection Code.
Induction
Voltage produced on a conductive object that is
subjected to a changing magnetic field.
Isolated
Separated from all sources of dynamic energy.
Isolated Zone
A section of line or portion of apparatus between
isolation points, separated from all sources of
dynamic energy.
Job Plan REV 01/14
A work plan agreed to by all workers involved that
identifies all known hazards, eliminates the hazards
where practical, controls the hazards that cannot be
eliminated, protects against injury if a hazard gets
out of control, minimizes the severity of an injury if
one takes place and identifies each worker’s
responsibilities in the performance of the work.
WNIDCL_PR_019(H1) Attachment E 27 of 176
28 EUSR Definitions
Lines
All overhead conductors used for transmitting or
distributing electrical energy.
Live Line Work
Work activities carried out by authorized workers on
live conductors and associated apparatus, using
special equipment and approved work procedures.
Maintenance Chamber and/or Vault
A chamber or enclosure used in an underground
electrical distribution system to house electrical
apparatus or the entrance way thereto.
Nominal Voltage REV 01/14
The normal operating voltage measured phase to
phase on multi-phase equipment, or phase to-
neutral on single-phase equipment.
Non-Insulated Booms and Non-Insulated Portion
of Aerial Devices
An articulated or extendable lifting device with no
tested electrical insulating qualities.
Personal Protective Equipment REV 01/14
Approved safety equipment worn and used to
reduce the risk of personal injury.
Proximity REV 01/14
Proximity is defined by the following limits of
approach and does not apply to apparatus that is
designed, built and installed to be intrinsically safe for
human touch,

WNIDCL_PR_019(H1) Attachment E 28 of 176
EUSR Definitions 29
a) within 3 metres (10 feet) of energized apparatus
above 750 V to 150 kV;
b) within 4.5 metres (15 feet) of energized apparatus
above 150 kV to 250 kV; and
c) within 6 metres (20 feet) of energized apparatus
above 250 kV.
Safe Limits of Approach
A procedural barrier system for authorized workers
or workers under the continuous direction of an
authorized worker, intended to minimize the risk
associated with working in proximity to exposed
energized apparatus. 
Safety Interlock
A device or system which prohibits the improper
sequence of operations.
Safe Work Area
A specifically identified area for work where all known
hazards have been eliminated or are controlled.
Second Point of Contact REV 01/14
Anything at a potential other than that of the worker.
Supervisor
A person who has charge over a workplace or
authority over a worker.
WNIDCL_PR_019(H1) Attachment E 29 of 176
30 EUSR Definitions
Utility Work Protection Code REV 01/14
The written procedures to establish an isolated
tagged and/or locked out condition for work. The
Utility Work Protection Code has been approved
and adopted by the Infrastructure Health and Safety
Association and Hydro One Inc.
Worker
A person who performs work or supplies services for
monetary compensation.
Work Permit NEW
A Work permit is a written guarantee:
that an isolated, or isolated and de-energized
condition has been established for work, and
will continue to exist, except for authorized tests.
Workplace
Any land, premises, location or thing at, upon, in or
near which a worker works.
WNIDCL_PR_019(H1) Attachment E 30 of 176
Electrical Utility Safety Rules 31
Electrical Utility Safety Rules
100 General REV 01/14
1. The first consideration by workers in the course
of their work must be the safeguarding of life
and the avoidance of personal injury.
2. These rules are mandatory and must be
followed at all times.
3. In situations where a specific rule does not
apply or where the rules themselves are not
wholly understood, specific instructions and
procedures shall be obtained from the
supervisor before proceeding with work.
101 Employer’s Management of Rules REV 01/14
The employer shall establish a written policy and
procedure to manage these safety rules and to
ensure they are correctly applied. The policy
must deal with resolving disagreements on the
interpretation of a rule.
If it should become necessary to depart from
any portion of the rules, the departure must,
result in a level of safety equal to or greater
than that provided by the Electrical Utility
Safety Rules;
be fully documented and approved by the
employer, and
be sent to the Joint Health and Safety
Committee or the Health and Safety
Representative, if any, for the workplace.
WNIDCL_PR_019(H1) Attachment E 31 of 176
32 Electrical Utility Safety Rules
102 Knowledge of Rules REV 01/14
Workers conducting work on or in proximity to
exposed apparatus of an electrical distribution
or transmission system shall have a copy of
these safety rules. Workers shall be trained in
the application of the rules. Workers shall follow
all rules applicable to their particular duties and
to the duties of any employee they supervise.
103 Personal Conduct
1. A worker under the influence of any drug or
intoxicant, which may inhibit safe work
performance, shall not perform work or be
permitted to work.
2. Workers are not to engage in any pranks,
contests, feats of strength, unnecessary
running or rough and boisterous conduct in
the workplace nor urge fellow workers to
take unnecessary risks.
104 Physical and Other Limitations
Workers shall inform their supervisor of any
physical, personal or other limitations that may
reduce their ability to work safely.
WNIDCL_PR_019(H1) Attachment E 32 of 176
Electrical Utility Safety Rules 33
105 Jewelry and Long Hair
1. Jewelry must NOT be worn where it would
present an increased risk of injury.
2. Long hair, including facial hair, must be
suitably confined where it would present an
increased risk of injury.
106 Authorization for Work
Only authorized workers or workers under the
direction of an authorized worker may perform
work on or in proximity to exposed energized
apparatus.
107 Job Planning REV 01/14
1. a) All work must be properly planned and
communicated, taking into account all
workers, the general public, approved
work procedures, equipment, and the
physical and environmental conditions at
the workplace. The purpose of this
process is to establish a safe work area,
by identifying the job steps, hazards and
appropriate barriers. The steps to be
taken in case of an emergency shall also
be documented.
WNIDCL_PR_019(H1) Attachment E 33 of 176
34 Electrical Utility Safety Rules
b) Barriers used to protect against electrical
hazards must be made of materials
having an adequate electrical insulation
value, and barriers used to protect against
mechanical hazards must be of adequate
strength for the purpose intended. Visual
barriers must be used wherever practical;
to identify clearly the safe work area(s)
for the worker(s), and/or restrict access to
unauthorized people.
c) Visual barriers must be,
 made of approved materials;
 posted with the appropriate
warnings;
 installed before the work begins; and
 respected in the same manner as other
safety barriers
2. A documented job plan must be completed
prior to the performance of all tasks,
a) on or in proximity to energized electrical
equipment;
b) requiring the establishment of work
protection; or
c) involving critical hazards such as, but not
limited to, falling, hoisting, confined
space, hazardous substance, etc.
WNIDCL_PR_019(H1) Attachment E 34 of 176
Electrical Utility Safety Rules 35
3. If a change is encountered in the job, work
must stop, and the new hazard must be
identified and eliminated or controlled. The
revised job plan must be communicated to
all workers and where necessary to the
controlling authority, before re-starting
work.
4. The controlling authority shall be notified of
work location and duration of work, when
work is performed on or in proximity to
equipment energized above 750 V.
5. A means of communication shall be readily
available at all times between the controlling
authority and any work crews performing
work in proximity to apparatus energized
above 750 V.
108 Weather Conditions
1. When weather conditions make the job
unduly hazardous, work must be suspended
immediately.
2. All work on or near apparatus where a
lightning strike may cause personal injury will
be suspended immediately whenever
deemed to be unsafe by the on-site
supervisor/worker.
WNIDCL_PR_019(H1) Attachment E 35 of 176
36 Electrical Utility Safety Rules
109 Operating Maps and Component
Nomenclature REV 01/14
1. All electrical components used in the control
of an electrical transmission, distribution or
generating system, including non-utility
generation, must be identified and
appropriately labelled with legible
nomenclature.
2. Up-to-date operating maps and diagrams
must be readily available to workers for all
locations where work is being performed.
110 First Aid
1. Employers must develop and maintain an
emergency response capability in their
workplaces, including the training of
personnel to meet all the requirements of the
Workplace Safety and Insurance Act and all
applicable current legislation.
2. A list of names and telephone numbers of
ambulance services, hospitals, fire
departments, police, and members of the
company who are to be called in emergencies,
shall be provided at the work location.
3. First aid training must include the “Life
Saving” module of CPR.
4. First aid kits meeting Workplace Safety and
Insurance Act standards shall be maintained
and suitably located in all workplaces and
vehicles.
WNIDCL_PR_019(H1) Attachment E 36 of 176
Electrical Utility Safety Rules 37
111 Emergency Response
1. Workplaces must have an emergency
response plan and the plan shall be posted
in a conspicuous location at the workplace
or project.
2. All workers must be instructed in the
emergency response plan and must
practice it at regular intervals.
3. Should an emergency make it necessary to
deviate from these safety rules, the worker(s)
performing the work shall take every
precaution reasonable in the circumstances
to protect all workers and the general public
by maintaining a safe work environment.
4. If a worker takes immediate action in an
emergency to safeguard life or property, it
must be followed promptly with a report to
his/her supervisor, stating the action taken
and the reasons for it.
112 Rescue Operations
1. Each employer shall establish written
policies and procedures for performing
rescue operations. All appropriate workers
and their supervisor(s) shall be familiar with,
and competent in, the execution of the rescue
technique, including First Aid.
2. Employees who may be required to perform a
rescue shall be trained in the appropriate
rescue procedure for the work being
performed.
WNIDCL_PR_019(H1) Attachment E 37 of 176
38 Electrical Utility Safety Rules
3. To ensure competency is maintained, the
minimum requirement is to perform at least
one practice session per year for each
specific rescue procedure that may be
required in the performance of duties.
4. All rescue procedure training and practice
sessions shall be documented, and records
kept.
5. A synthetic rescue rope or mechanical device
approved for rescue purposes shall be
conspicuously located and readily available
where crews are engaged in overhead or
underground work operations. The rope shall
be designed for lifesaving purposes and shall
have a minimum breaking strength (MBS) of
2,300 kilograms (5,000 pounds ).
113 Arc Flash, Flame Resistant Protective
Equipment
When workers are required to perform work on
exposed energized apparatus or where
exposure to an arc flash hazard exists, all
practical measures shall be taken to protect
workers against the effects of electric arc flash.
1. When working on or in proximity to exposed
energized apparatus,
WNIDCL_PR_019(H1) Attachment E 38 of 176
Electrical Utility Safety Rules 39
a) The arc flash, flame resistant clothing
and approved protective equipment
selected must provide an adequate level of
protection to protect the worker.
b) The outer layer of clothing must be made
of arc flash, flame resistant material.
c) Clothing worn in conjunction with arc
flash, flame resistant clothing must not
contribute to increased worker injury.
d) Arc flash, flame resistant clothing, foul-
weather clothing and protective equipment
must be manufactured, tested and
maintained to current recognized industry
standards.
e) Workers shall wear approved eye
protection in all circumstances where there
is a possibility of an electrical flash or arc.
2. Arc Flash, flame resistant clothing may not
be required to be worn for workers working
up to the limits as specified in Rule 129 “Safe
Limits of Approach” for Authorized
Workers, if the following requirements are
met. The worker,
a) is authorized;
b) is appropriately trained in the work to be
performed; and
c) establishes safe conditions of work (see
Rule 114).
WNIDCL_PR_019(H1) Attachment E 39 of 176
40 Electrical Utility Safety Rules
114 Safe Conditions for Work REV 01/14
No work shall be done on electrical apparatus,
mobile or fixed equipment, mechanical equipment
or systems that may have electrical, dynamic or
potential energy, unless safe conditions for work
are provided by one or more of the following methods:
a) the apparatus is isolated and de-energized
in accordance with the Utility Work
Protection Code;
b) worker protection is provided by an
approved isolation procedure as defined
in the Utility Work Protection Code;
c) the apparatus is physically removed from the
immediate vicinity of any source of electrical,
dynamic or potential energy, has no ready
means of connection, and has had all stored
energy discharged;
d) worker protection is provided by an
approved practice, the work is performed
by an authorized worker and all limits of
approach are followed as per Rule 129
“Safe Limits of Approach”.
WNIDCL_PR_019(H1) Attachment E 40 of 176
Electrical Utility Safety Rules 41
115 Work on Isolated Circuits
1. No work shall be performed on an isolated
circuit until formal work protection is
established and the circuit de-energized in
accordance with the Utility Work Protection
Code.
2. All isolating, de-energizing, tagging and
locking of devices must comply with the
provisions of the Utility Work Protection
Code.
116 Work on Neutral Conductors, Buses and
Skywires
1. All work on neutral conductors, neutral
buses and skywires must be performed in
accordance with Rule 128 “Apparatus to be
Treated as Energized”.
2. When cutting, splicing or repairing a neutral
conductor, neutral bus or skywire, the use of
adequate jumpers to prevent a potential
difference shall be used and installed/
removed using approved work procedures.
117 Establishment of Hold-Offs REV 01/14
1. Where the electrical system equipment
exists, a hold-off shall be established for
equipment protection and must not be used
in place of a work permit whenever,
a) live line work procedures are being
performed;
WNIDCL_PR_019(H1) Attachment E 41 of 176
42 Electrical Utility Safety Rules
b) stringing, sagging, raising or lowering
conductors or stringing ropes in
proximity to energized apparatus;
c) installing or removing poles that are within
the “Safe Limits of Approach” as per
Rule 129 for Non-Insulated Booms and
Non-Insulated Portion of Aerial Devices.
d) installing or removing loops of airbreak
switches, load interrupters, loadbreak
switches and bypass tubes;
e) installing or removing live line openers
(conductor and clamp assembly);
f) moving energized cables over 750 V; or
g) an employer, supervisor, worker, or
controlling authority considers it
necessary or it is determined during job
planning.
118 Static Electricity and Induction
Workers must identify all sources of static
electricity and induction. Approved grounding
and bonding procedures must then be used to
eliminate or control these hazards.
WNIDCL_PR_019(H1) Attachment E 42 of 176
Electrical Utility Safety Rules 43
119 Use of Temporary Grounds
1. Temporary grounds must be used in
accordance with approved grounding/
bonding procedures and the Utility Work
Protection Code.
2. Potential tests must be performed prior to the
application of any grounding or bonding
equipment.
3. Equipotential point-of-work grounding shall
be the first choice for grounding systems on
overhead circuits.
4. Temporary grounding devices must be of
adequate current-carrying capacity to
withstand the maximum available fault currents.
5. Grounds must be highly visible through the
use of a coloured conductor jacket, marker
or flag.
6. Temporary grounds must be applied and
removed using live line tools and approved
work procedures.
7. No work shall be carried out on de-energized
apparatus until a safe work area has been
established.
8. Temporary grounds shall not be removed
until the workers or the Holder requiring the
grounds have completed their work, or
removal is required by an approved testing
procedure.
WNIDCL_PR_019(H1) Attachment E 43 of 176
44 Electrical Utility Safety Rules
9. An approved cable-spiking tool shall be
used to ensure positive identification before
cutting an underground cable with an
operating voltage of greater than 750 V.
10. Conductors of all circuits above 300 V
nominal, which have the ability of being
connected but have not yet been placed in
service or released to a controlling
authority, must remain de-energized until
the conductors are connected for service.
120 Electrical-Testing Devices REV 01/14
1. Only certified and approved electrical-testing
devices that have been verified as
operational prior to use shall be used when
testing electrical apparatus.
2. Electrical-testing devices shall only be used
in accordance with the manufacturers’
specifications and approved work
procedures.
3. All voltmeters, multimeters, and phase-
rotation indicators rated up to 750 V AC that
utilize direct contact to energized equipment
shall be equipped with fused leads.
4. All voltmeters and multimeters shall be
designed and approved for use on outdoor
distribution systems.
WNIDCL_PR_019(H1) Attachment E 44 of 176
Electrical Utility Safety Rules 45
121 High-Voltage Testing
1. All high-voltage testing shall be conducted,
a) using approved work procedures; and
b) where applicable in accordance with the
Utility Work Protection Code.
2. All potential indicators used on voltages
greater than 750 V, must be re-certified
yearly by a certified laboratory, or more
often if deemed necessary, following the
manufacturers’ recommendations and shall
be marked with a legible test/expiry date.
122 Working Alone REV 01/14
1. A worker must NOT work alone when,
a) conditions for the use of fall arrest, fall
restricting or travel restraint systems are
required;
b) working aloft on a straight or extension
ladder before it is secured;
c) working on a nominal voltage of 300 V or
greater;
d) working in proximity to exposed
energized apparatus except when
meeting conditions in 2 a) below;
e) performing switching operations in an
underground electrical system that
involves the operation of elbows or
exposed switching devices;
WNIDCL_PR_019(H1) Attachment E 45 of 176
46 Electrical Utility Safety Rules
f) working in a confined space;
g) patrolling lines if weather conditions or
other factors make it potentially hazardous
to patrol safely alone and a means of two-
way communication cannot be maintained;
or
h) working in a battery room except when
meeting conditions in 2 c). Where the room
is partitioned, only the part containing the
batteries is considered the battery room.
2. Working alone is permitted,
a) in proximity to exposed energized
apparatus up to the limits as specified in
Rule 129 “Safe Limits of Approach” for
Authorized Workers, when a worker
meets the following conditions:
is authorized;
is appropriately trained in the work to be
performed; and
safe conditions of work have been
established as per Rule 114 a), b) ,c)
b) when operating switches and replacing
fuses that are part of an overhead electrical
system, while working from the ground;
c) for visual inspections in a battery room;
d) for any work where a hazard assessment
determines there are no factors that make
it unsafe to work alone.
WNIDCL_PR_019(H1) Attachment E 46 of 176
Electrical Utility Safety Rules 47
3. If a worker encounters hazards or conditions
that are judged to be unsafe to proceed while
working alone, or is not competent to
complete the required work alone, the work
must not proceed until the concern is
resolved.
4. When a second worker is required, he/she
must be a suitably equipped, competent
worker who can perform rescue operations
including CPR, and shall be available and
positioned to see the worker performing the
work.
For work in a confined space, a second
worker shall be positioned immediately
outside the entrance to the confined space
and maintain constant two-way
communication with worker(s).
123 Aerial Devices/Boom Trucks REV 01/14
1. Aerial devices/boom trucks shall be operated
within,
a) the limitations of the manufacturers’
specifications;
b) current legislation; and
c) the “Safe Limits of Approach” (see Rule
129).
2. An approved bucket evacuation device
(control descent device) shall be carried on
each aerial device.
WNIDCL_PR_019(H1) Attachment E 47 of 176
48 Electrical Utility Safety Rules
3. When a worker is aloft in an aerial device, a
rope of sufficient length to raise a bucket
evacuation device shall be carried.
4. Aerial devices, booms, jibs, buckets and
liners shall be dielectrically tested at regular
intervals as per Rule 134 “Inspection, Testing
and Selection of Live Line Tools, Protective
Equipment and Aerial Devices”, or more often
should this equipment become suspect or
whenever any insulated component is
altered, changed or repaired. All testing shall
be performed by a certified laboratory in
accordance with the current applicable
National Standards of Canada.
5. Aerial devices/boom trucks shall be visually
inspected for structural, mechanical and
hydraulic defects, including holding valve
checks, each day, prior to the equipment
being used. These inspections shall be
performed in accordance with manufacturers’
specifications and current legislation, and
shall be documented.
6. Aerial devices used to raise workers aloft for
live line work at more than 750 V nominal,
shall be equipped with upper and lower
controls. Lower controls shall be capable of
positively overriding upper controls.
7. Workers shall not be allowed to remain in the
bucket of an aerial device during emergency
lowering operations when pressure on the
hydraulic system is manually released.
WNIDCL_PR_019(H1) Attachment E 48 of 176
Electrical Utility Safety Rules 49
8. Boom trucks used as person-lifts shall not be
simultaneously used for hoisting operations
unless specifically designed for that purpose
by the manufacturer, and used following
approved procedures.
9. Bucket liners shall be used in the buckets of
an aerial device when engaged in rubber
glove live line techniques and barehand
techniques.
10. Prior to commencing work aloft, all boom and
bucket covers shall be completely removed.
11. Rubber glove live line work above 15 kV
nominal shall not be carried out from
extendable boom type aerial devices or boom
trucks with insulated boom and bucket
attachments unless the unit is specifically
designed and certified for the voltage to be
worked on.
12. When performing rubber glove live line work
up to15 kV nominal from extendable boom
type aerial devices or radial boom derricks
with insulated booms, as a minimum, the
restricted “Safe Limits of Approach”
between the worker’s reach and the non-
insulated portion of the boom shall be
maintained at all times.
WNIDCL_PR_019(H1) Attachment E 49 of 176
50 Electrical Utility Safety Rules
13. Aerial devices with upper boom insulation
only, and mobile work equipment such as
radial boom derricks, augers, cranes, or other
hoisting equipment being operated in
proximity to energized apparatus operating
above 750 V, and where there is a possibility
of contact,
a) shall be adequately grounded unless the
equipment is specifically designed and
manufactured to be operated without
equipment grounds; and
b) the operator shall remain on the operator
platform; or where no operator platform is
provided, the operator must stand on an
approved ground gradient control mat,
with an approved connection to the chassis
of the vehicle, while handling the controls;
and
c) where two or more aerial devices/boom
trucks are within 3 m (10 ft.) of each other,
and at least one of the units does not have
a certified lower boom insert, the vehicles
shall be bonded together and connected
to an effective ground.
14. Aerial devices equipped with a lower boom
insert and a turret elevator, that are used
where the lower boom below the insulated
portion is in proximity, shall be adequately
grounded.
WNIDCL_PR_019(H1) Attachment E 50 of 176
Electrical Utility Safety Rules 51
15. Auxiliary hydraulic hoses used in proximity
must be dielectric, and clearly identified as
such and meet approved industry standards.
16. Unless otherwise prescribed by an approved
practice or approved work procedure,
aerial devices used for rubber glove
techniques above 15kV phase-to phase shall
be subjected to a metered current leakage
test for the voltage to be worked on,
immediately prior to commencement of work,
and the results recorded.
124 Raising and Lowering of Tools and Material
REV 01/14
1. An approved handline must be used for
raising or lowering tools and material to
workers and only approved tool bags may
be used in conjunction with the handline.
2. When in proximity to energized apparatus,
a safe work area shall be established prior to
raising or lowering equipment.
3. Any rope being carried aloft by a worker or
attached to an anchor point on a structure
where workers are present shall be
appropriately controlled.
WNIDCL_PR_019(H1) Attachment E 51 of 176
52 Electrical Utility Safety Rules
4. When working in proximity, a second
worker shall be positioned to prevent any
part of the rope from breaching the applicable
limit of approach, or the rope shall be
securely attached to the structure at a
location that will maintain the applicable
“Safe Limits of Approach”.
5. When vehicular or pedestrian traffic is
present, and any part of the rope reaches the
ground or could be contacted by vehicles or
pedestrians, a second worker shall be
positioned to prevent any part of the rope
from making contact with all vehicular or
pedestrian traffic and/or the use of other
protective barriers, barricades, warning signs
or other effective barriers to prevent the rope
from being contacted by vehicular or
pedestrian traffic.
125 Switching Authorization REV 01/14
1. For authorization to perform switching
operations refer to Rule 106 “Authorization
for Work”.
2. Workers must NOT perform switching
operations without approval from the
controlling authority, except as allowed by
Rule 111 “Emergency Response”. If
switching operations are completed as per
Rule 111, notification must be made as soon
as reasonably possible to the controlling
authority.
WNIDCL_PR_019(H1) Attachment E 52 of 176
Electrical Utility Safety Rules 53
126 Switching Operations
1. All switching operations must be performed in
accordance with the Utility Work Protection
Code.
2. Contact points on switches used as isolating
devices for the purpose of work protection,
shall be visually checked as open; or where
dependence on switches with concealed
contacts is unavoidable, the employer shall
have a written procedure describing the
alternative method(s) which affords at least
equal protection for the worker(s).
3. All switches that have been opened or closed
for any reason shall be checked visually or by
electronic means to ensure that the proper
operation has occurred.
4. Approved live line tools of sufficient length to
maintain a safe working distance from
exposed energized apparatus shall be used.
5. Workers shall wear all appropriate and
approved personal protective equipment
during switching operations.
6. Approved ground gradient mats shall be
used when standing on the ground and,

WNIDCL_PR_019(H1) Attachment E 53 of 176
54 Electrical Utility Safety Rules
a) operating air break switches, load
interrupters, load break switches; or
b) operating motor-operated switches
manually.
7. Ground gradient mats are not required when
FRP live line tools are being used.
IHSA Supplemental
– Switching Operations
Rubber gloves shall be worn during all switching
operations as follows:
a) up to 750 V nominal, rubber gloves with a
minimum Class 0 rating shall be used;
b) above 750 V nominal, rubber gloves with a
minimum Class 1 rating shall be used;
c) when within reaching or falling distances
above 5 kV nominal, rubber gloves with a
minimum Class 2 rating shall be used.
Hydro One Inc. Supplemental
– Switching Operations
Rubber gloves of a minimum Class 2, shall be
worn as an additional barrier when,
a) operating airbreak switches, load interrupters,
load break switches or motor-operated
switches manually;
WNIDCL_PR_019(H1) Attachment E 54 of 176
Electrical Utility Safety Rules 55
b) operating all switching devices in an
underground electrical system, such as pad-
mount transformers, pole transformers and
sectionalizing switches;
c) operating switches in an overhead electrical
system, where the worker would be within
the Restricted Zone of exposed electrical
apparatus energized at 750 V nominal or
greater (see Rule 129 “Safe Limits of
Approach”); or
d) using switch sticks under damp or adverse
weather conditions.
127 Guarding and Safety Interlocking for
Personnel Protection
1. Guards and safety interlocks must NOT be
removed except for troubleshooting and/or
testing, and approved work procedures
must be used to protect employees and the
public from any exposed hazards.
2. Safety interlocks must NOT be by-passed
by the use of devices such as jumpers or
spare keys except for the following situations:
a) The device to be worked on or operated
and the associated interlock system are
both contained within an isolated zone;
OR
WNIDCL_PR_019(H1) Attachment E 55 of 176
56 Electrical Utility Safety Rules
b) Troubleshooting and/or testing is being
performed by a competent worker and
the following conditions are met:
A documented job plan identifying
hazards and the use of barriers to
control these hazards has been
completed and communicated to all
members of the work group; and
At least one member of the work group
remains within view of the device for
which the interlock has been by-passed,
and close enough to prevent any
unauthorized personnel from entering the
work area.
3. The safety interlock system must not be
bypassed before the guaranteed isolation
zone is established and it must be returned to
service before the isolation is surrendered.
128 Apparatus to be Treated as Energized
All electrical apparatus is to be considered
energized unless,
a) the apparatus is isolated and de-energized
in accordance with the Utility Work
Protection Code; or
b) the equipment is physically removed from the
immediate vicinity of any source of electrical,
dynamic or potential energy, has no ready
means of connection, and has had all stored
energy discharged.
WNIDCL_PR_019(H1) Attachment E 56 of 176
Electrical Utility Safety Rules 57
129 Safe Limits of Approach REV 01/14
The limits specified in the following table are the
minimum requirements. To obtain the safest
work environment, workers must maintain
maximum clearance, and use equipment and
procedures adequate to protect against
electrical shock or burns.
Cranes,
Power
Shovels,
Back
Hoes,
Mech.
Brush
Cutter
RBD,
Aerial
Ladder,
Work
Platform,
Uncertified
Aerial
Device
Certified
and Tested
by
Certified
Laboratory
Voltages OHSA
Minimum
Authorized
Worker
Restricted
Zone
Mobile Work Equipment
Non-
Insulated
Booms
Certified
Insulated
A.D.
OHSA
Personnel Zones
LIMITS OF APPROACHMaintain Maximum Clearances and Install Barriers Where Practical
>0.9 m
(3 ft)
>3.0 m
>4.5 m
>6.0 m
0.9 m to 0.3 m
(3 ft to 1 ft)
750 V
to 15 kV
0.9 m to 0.45 m
(3 ft to 1.5 ft)
>15 kV
to 35 kV
>1.2 m
(4 ft)
1.2 m to 0.6 m
(4 ft to 2 ft)
>35 kV
to 50 kV
>1.5 m
(5 ft)
1.5 m to 0.9 m
(5 ft to 3 ft)
>50 kV
to 150 kV
>2.1 m
(7 ft)
2.1 m to 1.2 m
(7 ft to 4 ft)
>150 kV
to 250 kV
>3.7 m
(12 ft)
3.7 m to 2.75 m
(12 ft to 9 ft)
>250 kV
to 550 kV
>3.0 m
>4.5 m
>6.0 m
>0.9 m
(3 ft)
>1.2 m
(4 ft)
>2.4 m
(8 ft)
>3.0 m
(10 ft)
>4.6 m
(15 ft)
>0.3 m
(1 ft)
>0.45 m
(1.5 ft)
>0.9 m
(3 ft)
>1.2 m
(4 ft)
>2.75 m
(9 ft)
SYMBOLS  less than or equal to
> greater than
< less than
WNIDCL_PR_019(H1) Attachment E 57 of 176
58 Electrical Utility Safety Rules

For Authorized Workers:
Only authorized workers or workers under
the continuous direction of an authorized
worker may approach, work or allow material
or conductive tools to approach exposed
energized electrical apparatus to limits
stated.
In planning the task to be performed,
consideration must be given to the worker’s
position in relation to the exposed energized
apparatus such that movements of the
worker’s body or conductive tools, material or
vegetation will not result in any encroachment
upon these limits.
WNIDCL_PR_019(H1) Attachment E 58 of 176
Electrical Utility Safety Rules 59

Cranes,
Power
Shovels,
Back
Hoes,
Mech.
Brush
Cutter
RBD,
Aerial
Ladder,
Work
Platform,
Uncertified
Aerial
Device
Certified
and Tested
by
Certified
Laboratory
Voltages OHSA
Minimum
Authorized
Worker
Restricted
Zone
Mobile Work Equipment
Non-
Insulated
Booms
Certified
Insulated
A.D.
OHSA
Personnel Zones
LIMITS OF APPROACHMaintain Maximum Clearances and Install Barriers Where Practical
>0.9 m
(3 ft)
>3.0 m
>4.5 m
>6.0 m
0.9 m to 0.3 m
(3 ft to 1 ft)
750 V
to 15 kV
0.9 m to 0.45 m
(3 ft to 1.5 ft)
>15 kV
to 35 kV
>1.2 m
(4 ft)
1.2 m to 0.6 m
(4 ft to 2 ft)
>35 kV
to 50 kV
>1.5 m
(5 ft)
1.5 m to 0.9 m
(5 ft to 3 ft)
>50 kV
to 150 kV
>2.1 m
(7 ft)
2.1 m to 1.2 m
(7 ft to 4 ft)
>150 kV
to 250 kV
>3.7 m
(12 ft)
3.7 m to 2.75 m
(12 ft to 9 ft)
>250 kV
to 550 kV
>3.0 m
>4.5 m
>6.0 m
>0.9 m
(3 ft)
>1.2 m
(4 ft)
>2.4 m
(8 ft)
>3.0 m
(10 ft)
>4.6 m
(15 ft)
>0.3 m
(1 ft)
>0.45 m
(1.5 ft)
>0.9 m
(3 ft)
>1.2 m
(4 ft)
>2.75 m
(9 ft)
SYMBOLS  less than or equal to
> greater than
< less than
WNIDCL_PR_019(H1) Attachment E 59 of 176
60 Electrical Utility Safety Rules
For Work in the Restricted Zone:
The Minimum Clearances provided in the
Restricted Zone for authorized workers may
only be reduced when authorized workers are
performing approved live line procedures, or
when approved cover-up (rated for the voltage
being worked on) has been applied. The worker
and equipment must maintain a minimum
distance of 15 cm (6 inches) from the installed,
approved barrier(s).
Authorized workers or a worker(s) in training
under the continuous direction of an authorized
worker may approach or allow material or
conductive tools to approach exposed
energized electrical apparatus as stated in the
Restricted Zone section, only when the following
conditions are adhered to:
for all work up to 50 kV, appropriate rubber
gloves must be worn while in the Restricted
Zone;
barriers and/or cover-up must be installed
where practical to minimize exposure to
energized electrical apparatus and all
second points of contact;
a dedicated observer must be in place, who
is competent in the task being performed and
has no other duties while monitoring the work
continuously;
WNIDCL_PR_019(H1) Attachment E 60 of 176
Electrical Utility Safety Rules 61
either the worker performing the work or
the dedicated observer must have
successfully completed the 4th year of a
formal Powerline Technician
Apprenticeship training program or
equivalent; and
the worker’s position in relation to the
exposed energized electrical apparatus
shall be such that movements of the
worker’s body or conductive tools, material
or vegetation will not result in any
encroachment.

Cranes,
Power
Shovels,
Back
Hoes,
Mech.
Brush
Cutter
RBD,
Aerial
Ladder,
Work
Platform,
Uncertified
Aerial
Device
Certified
and Tested
by
Certified
Laboratory
Voltages OHSA
Minimum
Authorized
Worker
Restricted
Zone
Mobile Work Equipment
Non-
Insulated
Booms
Certified
Insulated
A.D.
OHSA
Personnel Zones
LIMITS OF APPROACHMaintain Maximum Clearances and Install Barriers Where Practical
>0.9 m
(3 ft)
>3.0 m
>4.5 m
>6.0 m
0.9 m to 0.3 m
(3 ft to 1 ft)
750 V
to 15 kV
0.9 m to 0.45 m
(3 ft to 1.5 ft)
>15 kV
to 35 kV
>1.2 m
(4 ft)
1.2 m to 0.6 m
(4 ft to 2 ft)
>35 kV
to 50 kV
>1.5 m
(5 ft)
1.5 m to 0.9 m
(5 ft to 3 ft)
>50 kV
to 150 kV
>2.1 m
(7 ft)
2.1 m to 1.2 m
(7 ft to 4 ft)
>150 kV
to 250 kV
>3.7 m
(12 ft)
3.7 m to 2.75 m
(12 ft to 9 ft)
>250 kV
to 550 kV
>3.0 m
>4.5 m
>6.0 m
>0.9 m
(3 ft)
>1.2 m
(4 ft)
>2.4 m
(8 ft)
>3.0 m
(10 ft)
>4.6 m
(15 ft)
>0.3 m
(1 ft)
>0.45 m
(1.5 ft)
>0.9 m
(3 ft)
>1.2 m
(4 ft)
>2.75 m
(9 ft)
SYMBOLS  less than or equal to
> greater than
< less than
WNIDCL_PR_019(H1) Attachment E 61 of 176
62 Electrical Utility Safety Rules
Non-Insulated Booms and Non-Insulated
Portion of Aerial Devices:
Only authorized workers or workers under
the continuous direction of an authorized
worker, are permitted to operate non-
insulated booms or non-insulated portion
of aerial devices in proximity to exposed
energized apparatus.
Unless otherwise prescribed by an
approved work procedure, the distances
stated must be strictly followed for all parts
of the equipment, including the booms,
hoisting cables and any part of the load
being hoisted. Additional clearance must
allow for any change in boom angle, swing
of the hoisting cable and load while it is
being moved.
For hoisting and rigging operations in the
proximity of energized electrical
apparatus a dedicated signal person must
be used.

WNIDCL_PR_019(H1) Attachment E 62 of 176
Electrical Utility Safety Rules 63

Cranes,
Power
Shovels,
Back
Hoes,
Mech.
Brush
Cutter
RBD,
Aerial
Ladder,
Work
Platform,
Uncertified
Aerial
Device
Certified
and Tested
by
Certified
Laboratory
Voltages OHSA
Minimum
Authorized
Worker
Restricted
Zone
Mobile Work Equipment
Non-
Insulated
Booms
Certified
Insulated
A.D.
OHSA
Personnel Zones
LIMITS OF APPROACHMaintain Maximum Clearances and Install Barriers Where Practical
>0.9 m
(3 ft)
>3.0 m
>4.5 m
>6.0 m
0.9 m to 0.3 m
(3 ft to 1 ft)
750 V
to 15 kV
0.9 m to 0.45 m
(3 ft to 1.5 ft)
>15 kV
to 35 kV
>1.2 m
(4 ft)
1.2 m to 0.6 m
(4 ft to 2 ft)
>35 kV
to 50 kV
>1.5 m
(5 ft)
1.5 m to 0.9 m
(5 ft to 3 ft)
>50 kV
to 150 kV
>2.1 m
(7 ft)
2.1 m to 1.2 m
(7 ft to 4 ft)
>150 kV
to 250 kV
>3.7 m
(12 ft)
3.7 m to 2.75 m
(12 ft to 9 ft)
>250 kV
to 550 kV
>3.0 m
>4.5 m
>6.0 m
>0.9 m
(3 ft)
>1.2 m
(4 ft)
>2.4 m
(8 ft)
>3.0 m
(10 ft)
>4.6 m
(15 ft)
>0.3 m
(1 ft)
>0.45 m
(1.5 ft)
>0.9 m
(3 ft)
>1.2 m
(4 ft)
>2.75 m
(9 ft)
SYMBOLS  less than or equal to
> greater than
< less than
WNIDCL_PR_019(H1) Attachment E 63 of 176
64 Electrical Utility Safety Rules
Certified Insulated Aerial Devices:
Only authorized workers or workers in
training under the continuous direction of an
authorized worker are permitted to operate
certified insulated aerial devices in
proximity to exposed energized apparatus
as per the distances specified.
For voltages up to and including 50 kV,
approved barriers and/or cover-up must be
installed when the minimum clearance
stated in this table cannot be maintained.
For voltages where there are no approved
barriers, the stated limits in this table must
never be reduced.
For hoisting and rigging operations in the
proximity of energized electrical
apparatus a dedicated signal person must
be used.

WNIDCL_PR_019(H1) Attachment E 64 of 176
Electrical Utility Safety Rules 65

Cranes,
Power
Shovels,
Back
Hoes,
Mech.
Brush
Cutter
RBD,
Aerial
Ladder,
Work
Platform,
Uncertified
Aerial
Device
Certified
and Tested
by
Certified
Laboratory
Voltages OHSA
Minimum
Authorized
Worker
Restricted
Zone
Mobile Work Equipment
Non-
Insulated
Booms
Certified
Insulated
A.D.
OHSA
Personnel Zones
LIMITS OF APPROACHMaintain Maximum Clearances and Install Barriers Where Practical
>0.9 m
(3 ft)
>3.0 m
>4.5 m
>6.0 m
0.9 m to 0.3 m
(3 ft to 1 ft)
750 V
to 15 kV
0.9 m to 0.45 m
(3 ft to 1.5 ft)
>15 kV
to 35 kV
>1.2 m
(4 ft)
1.2 m to 0.6 m
(4 ft to 2 ft)
>35 kV
to 50 kV
>1.5 m
(5 ft)
1.5 m to 0.9 m
(5 ft to 3 ft)
>50 kV
to 150 kV
>2.1 m
(7 ft)
2.1 m to 1.2 m
(7 ft to 4 ft)
>150 kV
to 250 kV
>3.7 m
(12 ft)
3.7 m to 2.75 m
(12 ft to 9 ft)
>250 kV
to 550 kV
>3.0 m
>4.5 m
>6.0 m
>0.9 m
(3 ft)
>1.2 m
(4 ft)
>2.4 m
(8 ft)
>3.0 m
(10 ft)
>4.6 m
(15 ft)
>0.3 m
(1 ft)
>0.45 m
(1.5 ft)
>0.9 m
(3 ft)
>1.2 m
(4 ft)
>2.75 m
(9 ft)
SYMBOLS  less than or equal to
> greater than
< less than
WNIDCL_PR_019(H1) Attachment E 65 of 176
66 Electrical Utility Safety Rules
130 Items in Direct Contact with Energized
Apparatus REV 01/14
Unless otherwise prescribed by an approved
practice or approved work procedure,
workers must not make contact with any pole,
structure, tree or non-insulated vehicle that is in
direct contact with apparatus energized at
voltages greater than 750 V.
Items in direct contact with energized
apparatus may only be cleared,
a) while working from an insulated aerial device
and using live line techniques;
b) using insulated FRP tools from the ground
while wearing rubber gloves; or
c) by de-energizing the electrical apparatus
according to the Utility Work Protection
Code.
131 Painting
1. Approved work procedures must be in
place for painting operations in proximity to
energized apparatus.
2. Painting operations must NOT be carried out
where paint spray or a string of paint may
reduce the Restricted Limits of Approach to
exposed energized apparatus.
WNIDCL_PR_019(H1) Attachment E 66 of 176
Electrical Utility Safety Rules 67
132 Work on Energized Apparatus REV 01/14
1. A formal risk assessment shall be conducted
and written procedures shall be established
and implemented to adequately protect a
worker from electrical shock and burn.
2. Before performing work on energized
apparatus, a review of the written procedure,
or if the written procedure is not available, the
job steps must be listed directly on the job
plan document and communicated to all
workers.
3. Workers shall use protective equipment and
barriers adequate to protect them from
electrical shock or burn.
133 Authorization for Live Line Work
Live line work shall only be performed by
authorized workers or workers under the
continuous direction of an authorized worker,
while using approved work procedures.
134 Inspection, Testing and Selection of Live
Line Tools, Protective Equipment and Aerial
Devices REV 01/14
1. Initial electrical acceptance tests, regular
inspections, electrical retesting and
maintenance practices must be followed for
all FRP live line tools and rubber or fibre/
plastic protective equipment (See Table 1).
WNIDCL_PR_019(H1) Attachment E 67 of 176
68 Electrical Utility Safety Rules
2. Initial electrical acceptance tests and
regular electrical retests for rubber gloves,
FRP live line tools and rubber or fibre/
plastic protective equipment, shall be
performed by a certified laboratory.
3. The expiry date must be clearly shown on
the piece of equipment, and it must never
be used beyond the expiry date. If the
expiry date is not visible, the equipment
shall not be used and must be returned for
laboratory retesting.
4. Pole pruners used in live line applications
shall be approved and equipped with an
insulated insert in the rope.
5. Motorized non-insulated pole pruners/pole
saws shall not be used in proximity to
energized apparatus operating at voltages
greater than 750 V, and where there is a
possibility of contact.
6. All live line tools, rubber gloves and
protective equipment must be clean and
visually inspected each day prior to use.
7. When defects, such as cracks, bruises,
punctures or other abnormalities, are
detected through inspection, the equipment
must be removed from service and
returned to a certified laboratory for
retesting.
WNIDCL_PR_019(H1) Attachment E 68 of 176
Electrical Utility Safety Rules 69
8. Only approved cover-up shall be used on
voltages greater than 750 V.
9. Protective cover-up must not be allowed to
remain on energized apparatus longer than
absolutely necessary, in order to maintain its
dielectric integrity.

WNIDCL_PR_019(H1) Attachment E 69 of 176
70 Electrical Utility Safety Rules
Live Line Tools and Protective Equipment
Electrical Retesting Requirements
Table 1
Maximum Use Voltage
Phase to Phase
Retest
Frequency
Protective
Equipment
Rubber Gloves
Rubber Blankets, Line Hose, Couplers and Hoods
Bypass Jumpers/Tubes
Fibre/Plastic Cover-Up
Class 00
Class 0
Class 1
Class 2
Class 3
Class 4
Class 0
Class 1
Class 2
Class 3
Class 4
15 kV
35 kV
46 kV
Class 2
Class 3
Class 4
Class 5
Class 6
Insulated Pole Platform
FRP Live Line Tools
Hydraulic Pruners/Pole Saws
Insulated Aerial Device
Insulated Aerial Device
Barehand
Bucket Liner
500 V
1,000 V
7,500 V
17,000 V
26,500 V
36,000 V
1,000 V
7,500 V
17,000 V
26,500 V
36,000 V
15,000 V
35,000 V
46,000 V
14,600 V
26,400 V
36,600 V
48,300 V
72,500 V
15,000 V
As per the individual unit’s
current test certification
90 days
90 days
90 days
90 days
90 days
90 days
1 year
1 year
1 year
1 year
1 year
1 year
1 year
1 year
1 year
1 year
1 year
1 year
1 year
3 year
3 year
1 year
1 year
6 months
1 year
WNIDCL_PR_019(H1) Attachment E 70 of 176
Electrical Utility Safety Rules 71
135 Rubber Glove Work
1. Workers who are required to wear rubber
gloves shall be trained in the proper Class
selection, and the care and use of rubber
gloves and leather protectors.
2. For selection of the appropriate Class of
rubber glove, see Rule 134 “Inspection,
Testing and Selection of Live Line Tools,
Protective Equipment and Aerial Devices”.
3. Only rubber gloves that have received initial
acceptance tests in accordance with
American Standards Testing of Material
(ASTM) specifications and sized to fit the
worker shall be issued.
4. All rubber gloves shall be marked with a
legible expiry date and shall never be used
beyond this date.
5. Approved protective covers must be used in
conjunction with rubber gloves, and never be
used separately as a work glove.
6. Rubber gloves shall,
a) be air tested and visually inspected each
day prior to use;
b) be exchanged when they become
damaged or when the worker to whom
they are assigned has reason to doubt
their condition;
c) be stored away from energized electrical
apparatus where ionization or corona may
be present;
WNIDCL_PR_019(H1) Attachment E 71 of 176
72 Electrical Utility Safety Rules
d) be used only with approved protective
covers; and
e) never be worn inside out.
7. Jewelry must not be worn while wearing
rubber gloves.
8. To ensure electrical integrity, the covers must
be sized so the minimum cuff distance meets
the requirements for each glove Class (see
Figure below for minimum distances between
glove gauntlet and cuff, as required by ASTM).
Distance Between Gauntlet and Cuff
Class
00
0
1
2
3
1
3 76
4
0.5
0.5
2
4
13
Inches Millimeters
13
25
51
102
Distance (D)
D

WNIDCL_PR_019(H1) Attachment E 72 of 176
Electrical Utility Safety Rules 73
9. Rubber glove techniques shall be carried out
under the establishment of a hold-off where
the electrical equipment exists.
10. Rubber gloves shall be worn when,
a) controlling poles by using tools and/or
ropes in the proximity of energized
overhead apparatus;
b) stringing or sagging conductors in the
proximity of energized overhead
apparatus;
c) workers on the ground are guiding
materials being raised aloft and distances
specified in the “Safe Limits of Approach”
for non-insulated booms cannot be
maintained.
Removing Rubber Gloves for Specific Jobs
When performing overhead rubber glove work,
certain jobs present undue difficulty of
performance while wearing rubber gloves. In
such cases, after measures have been taken
using rubber gloves to provide a protected area
that will guard against any possibility of
inadvertent contact with energized apparatus,
at the discretion and with the permission of the
worker at the worksite immediately in charge of
the work, rubber gloves may be removed and
other appropriate hand protection used during
the interval of the specific job. Rubber gloves in
these cases shall be worn when approaching
and leaving the protected area.
WNIDCL_PR_019(H1) Attachment E 73 of 176
74 Electrical Utility Safety Rules
IHSA Supplemental
– Rubber Glove Work
1. Ground-to-Ground/Rest-to-Rest Rule
Rubber gloves of the appropriate voltage
rating shall be put on before leaving the
ground, and worn continuously while work is
carried out on any pole or structure carrying
conductors that are energized or could
become energized at potentials to 36 kV.
The highest voltage on which work is to be
performed shall determine the appropriate
voltage rating of rubber gloves. In addition,
consideration must be given to “Safe Limits
of Approach” to any higher voltage
apparatus.
2. Lock-to-Lock Rubber Glove Rule
Rubber gloves of the appropriate voltage
rating shall be worn before opening doors or
gates, removing covers or panels to
enclosures or compartments that will expose
energized conductors within falling or
reaching distance, and shall be worn
continuously while work is being performed in
the enclosures or compartments until,
a) the covers or panels have been replaced
and the gates or doors closed and locked;
or
b) the conductors have been de-energized
and/or a safe work area established.
Note: Hands-on work on this equipment
energized above 750 V is prohibited.
WNIDCL_PR_019(H1) Attachment E 74 of 176
Electrical Utility Safety Rules 75
3. Line Clearing Operations
Workers shall wear the appropriate rubber
gloves with leather protectors when the
worker or that which is being worked on is
within 3 m (10 ft) of energized apparatus, as
follows:
a) up to 500 V nominal, minimum Class 00;
b) up to 750 V nominal, minimum Class 0;
c) up to 5 kV nominal, minimum Class 1;
d) over 5 kV and up to 50 kV nominal,
minimum Class 2.
4. Rubber glove work from 5 kV to 15 kV phase-
to-phase shall be carried out while standing
on an insulated pole platform or from a
certified insulated aerial device.
5. Rubber glove work from 15 kV to 36 kV
phase-to-phase shall be carried out from a
certified insulated aerial device.
WNIDCL_PR_019(H1) Attachment E 75 of 176
76 Electrical Utility Safety Rules
Hydro One Inc. Supplemental
– Rubber Glove Work
1. Rubber gloves shall be worn when,
a) working on electrical apparatus energized
at voltages greater than 300 V nominal;
b) working within the Restricted Zone to
exposed electrical apparatus energized at
750 V nominal or greater (see Rule 129
“Safe Limits of Approach”); or
c) using live line FRP tools under damp or
adverse weather conditions.
2. Rubber glove work on voltages greater than
750 V up to15 kV nominal shall be
performed while working from an insulated
pole platform or insulated aerial device.
3. Rubber glove work on voltages greater than
15 kV nominal shall be performed while
working from an insulated aerial device.
WNIDCL_PR_019(H1) Attachment E 76 of 176
Electrical Utility Safety Rules 77
136 Live Line Tool Work
1. Live line tool techniques shall be carried out
under the direct supervision of a worker
authorized to perform the work.
2. When working on energized lines or
equipment using live line tools, at least two
authorized workers shall be assigned to do
the work.
3. During live line tool work, rubber gloves shall
be worn whenever the worker is in the
Restricted Zone (Rule 129 “Safe Limits of
Approach”).
4. Live line tool techniques shall be carried out
under the establishment of a hold-off where
the electrical equipment exists.
5. When live line tool work is in progress, no
other work shall be carried out on the pole,
structure or any adjacent structures.

137 Barehand Work
1. Barehand techniques shall only be performed
by authorized workers who have received
formal training in this method.
2. Barehand work shall only be carried out
under the continuous observation of an
authorized dedicated observer, who has no
other duties that would distract from
monitoring the work.
WNIDCL_PR_019(H1) Attachment E 77 of 176
78 Electrical Utility Safety Rules
3. Barehand work shall only be performed while
workers are in a certified, insulated aerial
device approved for barehand work or using
certified and approved equipment (helicopter).
4. Aerial devices used for barehand work shall be,
a) dielectrically tested at least every six
months (boom, bucket, jib, etc.); and
b) subjected to a metered current leakage
test for the voltage to be worked on,
immediately prior to commencement of
work, and the results recorded.
5. The barehand technique shall be carried out
under the establishment of a hold-off where
the electrical equipment exists.
6. Bonding leads and clamps shall only be
used to establish and maintain grid potential
and their combined length shall never exceed
the depth of the bucket.
7. Workers shall only contact objects or
equipment to which they are bonded.
138 Stringing and Removing Conductors
1. Workers operating stringing equipment shall
be either authorized or under the direct
supervision of an authorized worker, and
shall follow approved documented
procedures.
WNIDCL_PR_019(H1) Attachment E 78 of 176
Electrical Utility Safety Rules 79
2. Workers involved in stringing or removing
conductors shall maintain clear
communication at all times.
3. Appropriate measures shall be taken to
protect workers and the public in the event
of a sudden loss of tension during stringing
operations.
4. When stringing or removing conductors
and the possibility of induced voltage or
contact with energized apparatus exists,
workers shall work in an equipotential
zone. Workers working in areas not
protected by equipotential grounding and
bonding shall wear rubber gloves when
handling the conductor. 
5. When stringing or removing conductors
crossing energized lines, or over roads
(public thoroughfares) where the flow of
traffic cannot be interrupted, only
approved tension stringing techniques
including suitable safeguards at all crossing
points, shall be used.
139 Hoists REV 01/14
1. Web hoists/nylon ratchet tensioners
suitable for use on energized conductors
shall be cared for as live line tools.
WNIDCL_PR_019(H1) Attachment E 79 of 176
80 Electrical Utility Safety Rules
2. Web hoists/nylon ratchet tensioners used on
voltages in excess of 750 V phase-to-phase,
shall be used in conjunction with link sticks or
other approved live line tools, when
connected to an anchor point at a different
potential than the phase being worked on.
3. Unless otherwise prescribed by an approved
work procedure, web hoists/nylon ratchet
tensioners shall be used whenever work
requiring a hoist is performed within the
Restricted Zone to exposed electrical
apparatus energized at 750 V nominal or
greater (see Rule 129 “Safe limits of
Approach”).
140 Confined Spaces REV 01/14
1. All electrical work in confined spaces shall
be performed by an authorized worker(s) in
accordance with a documented confined
space program and appropriate documented
work procedure(s) as required by legislation.
2. All confined space entrants shall wear an
approved full body harness at all times.
Where no additional hazard is created
through its use, a rescue rope or lifeline shall
be attached to the harness and its other end
to an anchor point or rescue/retrieval device
outside of the confined space.
WNIDCL_PR_019(H1) Attachment E 80 of 176
Electrical Utility Safety Rules 81
3. Where the system is so designed, switching
operations on underground equipment shall
be performed outside of the confined
space.
4. Workers, other than those involved in
authorized testing and switching, shall not
be present in confined spaces when
equipment is being energized/de-
energized.
141 Working on Cables and Associated
Equipment
1. Work on underground cables normally
energized in excess of 750 V nominal, unless
the cables are de-energized, shall be limited
to,
a) approved switching and testing
procedures while using live line tools; or
b) moving energized cables while wearing
rubber gloves of the appropriate Class.
2. Entry into enclosures, containing energized
apparatus, shall be restricted to those
enclosures of adequate size to permit the
establishment of a safe work area.
3. Moving energized cables over 750 V shall
be carried out with a hold-off in effect
where the electrical equipment exists.
WNIDCL_PR_019(H1) Attachment E 81 of 176
82 Electrical Utility Safety Rules
4. Energized cables shall be moved only by an
authorized worker or an unauthorized worker
under the continual direction of an authorized
worker, and with extreme care to avoid
damage to cable insulation.
5. Energized cables shall be inspected by an
authorized worker prior to moving to ensure
the cables and any splices will not create an
electrical hazard during the move. If the
inspection determines the condition of the
cable poses a hazard, the cable must be
isolated and de-energized prior to moving.
6. Other than approved switching procedures, no
physical pressure shall be applied to a cable
or separable connector that may cause any
movement, distortion or dislocation of the
connector.
7. Underground cables shall be adequately
supported to prevent undue stress to the
cables during any work activity.
8. When re-energizing spliced cables that have
been moved, workers shall remain clear of the
immediate work zone.
9. Approved procedures shall be followed to
ensure positive identification of cables or
apparatus on which work is to be performed.
WNIDCL_PR_019(H1) Attachment E 82 of 176
Electrical Utility Safety Rules 83
10. When spiking underground cables,
approved spiking tools shall be used to
ensure positive identification. Activation of the
spiking tool shall take place from outside the
immediate work zone.
142 Pulling Cable
1. Cables shall not be pulled into vaults or
maintenance chambers containing
energized apparatus until a safe work area
has been established.
2. Where a possibility exists that a “fish tape” could
contact energized apparatus, the fish tape shall
be made from nonconductive materials.
3. When pulling cables into a duct already
occupied by energized cables, the pulling
unit shall be grounded and the operator shall
be within an equipotential zone.
143 Portable Ladders
Only approved non-conductive portable ladders
shall be used when working on or in proximity
to energized apparatus.
144 Scaffolds
1. Scaffolding must adhere to all requirements
prescribed in the current Ontario Occupational
Health and Safety Act and Regulations.
WNIDCL_PR_019(H1) Attachment E 83 of 176
84 Electrical Utility Safety Rules
2. Scaffolds can be built, moved or used in
proximity to energized apparatus only
when the minimum clearances for any
section or part can be maintained as follows:
a) Clearances for Metal Scaffolding
i) vertical clearance shall be at least 0.61 m (2 ft.)
plus the distance specified in the appropriate
table from Rule 129 “Safe Limits of
Approach” for Authorized Workers; and
ii) horizontal clearance shall be at least 2.5 m (8 ft.)
plus the distance specified in the appropriate
table from Rule 129 “Safe Limits of
Approach” for Authorized Workers; and
iii) authorized workers on a scaffold must
maintain a safe distance from all energized
apparatus as specified in the appropriate
table from Rule 129 “Safe Limits of
Approach”; and
iv) metal scaffolds must be continuously bonded
and grounded when used in proximity to
exposed energized apparatus.
b) Clearances for Non-Conductive Scaffolding
i) Authorized workers can build, move or use
non-conductive scaffolding up to the limits in
Rule 129 “Safe Limits of Approach” for
Authorized Workers.
WNIDCL_PR_019(H1) Attachment E 84 of 176
Electrical Utility Safety Rules 85
145 Overhead Conductor Insulation REV 01/14
All covered/jacketed/insulated overhead
conductors energized at voltages greater
than 750 V, shall be treated as bare
conductors.
146 Temporary Power Cables
1. Electrical power cables used for temporary
service, which are on the ground or exposed
to vehicular traffic, must be clearly identified
and have barriers installed to prevent
accidental contact.
2. Temporary power cable installations must be
inspected for potential hazards, on a regular
basis by a competent worker.
147 Cord-Connected Electrical Equipment
Cord-connected electrical equipment shall not
be used where the tool and/or cord cannot be
secured to prevent its falling or reaching closer
than the “Safe Limits of Approach” for
Authorized Workers (see Rule 129), unless a
safe work area has been created through the
use of approved barriers.
148 Mobile Transformers
Mobile transformers shall be connected and
disconnected in accordance with documented
policies and procedures.
WNIDCL_PR_019(H1) Attachment E 85 of 176
86 Electrical Utility Safety Rules
149 Backfeed
1. Before starting work, backfeed hazards must
be identified and,
a) eliminated where possible; or
b) controlled using approved temporary
grounding procedures.
2. Due to the hazard of backfeed, work is not to
be performed on transformers connected in
parallel/banked (except for replacing fuses
using live line tools) until all sources of
electrical energy have been removed from
both the secondary and primary sides of the
transformer to be worked on.
WNIDCL_PR_019(H1) Attachment E 86 of 176
87
Hydro One Safety Rules

For all work on or in proximity to
energized electrical apparatus refer
to the preceding Electrical Utility
Safety Rules (Section 100).
The following Sections 200 to 900
apply to all work.
WNIDCL_PR_019(H1) Attachment E 87 of 176
88 WNIDCL_PR_019(H1) Attachment E 88 of 176
Hydro One Definitions 89
Hydro One Definitions
The following definitions relate to terms found, in italics,
in the Hydro One Safety Rules – Sections 2 to 9.
Apparatus
All equipment pertaining to the generation,
transmission, distribution and use of electricity.
Approved
A device or method that has been evaluated and
selected from alternatives that meet Hydro One’s
requirements.
Approved Work Procedure
The documented step-by-step method of performing
a task, which meets Hydro One’s specifications and
practices.
Authorized Worker
A person who has been given formal sanction and is
competent to perform work.
Bonded
Electrically connected to ensure that two or more
objects are at the same potential.
Charged
Isolated but not de-energized, containing stored
energy. Examples include a compressed spring or a
charged electrical capacitor. An object may also be
charged because it is suspended (potential energy)
or it is in motion (kinetic energy). Electrical equipment
not physically connected to a source of energy may
still be charged through induction because it is near
WNIDCL_PR_019(H1) Attachment E 89 of 176
90 Hydro One Definitions
live electrical apparatus. A tank or pipe may be
charged if it contains substances at greater or less
than atmospheric pressure, or if those substances
are poisonous, contaminated or explosive.
Competent
A person who,
is qualified because of their knowledge, training
and experience to organize work and its
performance,
is familiar with the provisions of the Occupational
Health and Safety Act, regulations that apply to the
work, the Hydro One Safety Rules, and approved
work procedures, and
has knowledge of any potential or actual danger to
health or safety in the workplace.
Competent Worker NEW
In relation to specific work, means a worker who,
a) is qualified because of knowledge, training and
experience to perform the work;
b) is familiar with the Occupational Health and
Safety Act and with the provisions of the
Regulations that apply to the work; and
c) has knowledge of all potential or actual danger to
health or safety in the work.
WNIDCL_PR_019(H1) Attachment E 90 of 176
Hydro One Definitions 91
Confined Space
A fully or partially enclosed space,
a) that is not both designed and constructed for
continuous human occupancy, and
b) in which atmospheric hazards may occur
because of its construction, location or contents
or because of work that is done in it.
Contractor
Any individual or firm engaged by Hydro One on a
contract, subcontract or consulting basis to do work
on behalf of the Corporation. The term is used in this
document to mean both the contractor and the
employees of a contractor.
Controlling Authority
The person who occupies a position responsible for
the control of specific equipment and devices. This
includes the responsibility for performing, directing or
authorizing changes in the conditions or in the
position of the equipment or devices.
Critical Hazard
A condition that has the potential for unwanted
energy flow that may result in an injury to a worker
or the public.
De-Energized
Electrical Apparatus:
Where electrical energy has been discharged
through a connection to an effective ground potential.
WNIDCL_PR_019(H1) Attachment E 91 of 176
92 Hydro One Definitions
Mechanical Apparatus:
Where hazards due to temperature, pressure,
chemical substances, gases, radiation and motion
have been minimized or, where practical, eliminated
by such measures as,
operation of valves, gates and dampers,
opening pipes or equipment to atmosphere,
purging, ventilating, or cooling,
applying brakes and blocking motion, and/or
discharging loaded springs.
Dynamic Energy
Energy or power that is available from an electrical
generator, an air compressor, a steam boiler or an
engine.
Dynamically Alive
Connected (that is, not isolated) to a source of energy
such as an electrical generator, storage battery, air
compressor, oil or water pump, steam boiler or furnace.
Emergency
A situation that requires immediate action to prevent
serious adverse effects on the health and safety of
employees, the public or the environment. An
emergency may be the result of uncontrolled
explosions, fires, releases of hazardous materials or
natural disasters.
Emergency Response Plan REV 01/14
A documented and communicated process designed
to ensure a safe environment for all workers and the
public to be used when responding to a specific
emergency.
WNIDCL_PR_019(H1) Attachment E 92 of 176
Hydro One Definitions 93
Employer
A person who employs or contracts the services of
one or more workers.
Energized
Capable of delivering energy by reason of being
dynamically alive or charged.
Fall Arrest System
An assembly of approved components joined
together so that when the assembly is connected to a
fixed support, it is capable of arresting a worker’s fall.
Fall Restrict System
A type of fall arrest system that has been designed
to limit a worker’s fall to a specified distance.
Hazard NEW
A source, situation or act with a potential for harm in
terms of human injury or ill health, or a combination
of these.
Incident
An event or condition, which results in, or has the
potential to result in, an injury or illness.
Induction
Voltage produced on a conductive object that is
subjected to a changing magnetic field.
WNIDCL_PR_019(H1) Attachment E 93 of 176
94 Hydro One Definitions
Isolated
Separated from all sources of dynamic energy.
Typically, apparatus is isolated by means of devices
such as a valve or electrical switch.
Isolated Zone
A section of line or portion of apparatus between
isolation points, separating it from all sources of
dynamic energy.
Job Plan REV 01/14
A work plan agreed to by all workers involved that
identifies all known hazards, eliminates the hazards
where practical, controls the hazards that cannot be
eliminated, protects against injury if a hazard gets
out of control, minimizes the severity of an injury if
one takes place and identifies each worker’s
responsibilities in the performance of the work.
Lines
Electrical Sense:
All overhead conductors and underground/submarine
cables, used for transmitting or distributing electrical
energy.
Mechanical Sense:
All pipes or hoses for the conveyance of gases or
liquids.
Live
See “Energized.”
WNIDCL_PR_019(H1) Attachment E 94 of 176
Hydro One Definitions 95
Live Line Work
Work activities carried out by authorized workers on
live conductors and associated apparatus, using
special equipment and approved work procedures.
Off-Road Vehicles
Vehicles not normally used on public highways as
defined in the Ontario Highway Traffic Act. For the
purposes of these rules and policies, forklift trucks
are considered off-road vehicles.
Personal Protective Equipment REV 01/14
Approved safety equipment worn and used to reduce
the risk of personal injury.
Proximity REV 01/14
Proximity is defined by the following limits of
approach and does not apply to apparatus that is
designed, built and installed to be intrinsically safe for
human touch.
a) within 3 metres (10 feet) of energized apparatus
above 750 V to 150 kV;
b) within 4.5 metres (15 feet) of energized apparatus
above 150 kV to 250 kV; and
c) within 6 metres (20 feet) of energized apparatus
above 250 kV.
Public Way
A sidewalk, street, highway, square or other open
space to which the public has access.
WNIDCL_PR_019(H1) Attachment E 95 of 176
96 Hydro One Definitions
Radiation
Microwave:
A radio wave which has a frequency between 300
MHz and 300 GHz, or a wavelength of between 30
cm and 1mm.
Ionizing:
Any radiation that is sufficiently energetic to cause
ionization (the process of forming an ion pair
consisting of an electron and a positively charged
ion). Ionization occurring in living tissue can result in
chemical changes to key biological molecules;
therefore exposure to ionizing radiation must be
limited.
Safe Work Area
A specifically identified area for work, where all
known hazards have been eliminated or are
controlled.
Safety Interlock
A device or system which prohibits the improper
sequence of operations.
Supervisor
A person who has charge over a workplace or
authority over a worker.
Travel Restraint System
An assembly of approved components capable of
restricting a worker’s movement on a work surface
and preventing the worker from reaching a location
from which he or she could fall.
WNIDCL_PR_019(H1) Attachment E 96 of 176
Hydro One Definitions 97
Utility Work Protection Code REV 01/14
The written procedures to establish an isolated
tagged and/or locked out condition for work. The
Utility Work Protection Code has been approved
and adopted by the Infrastructure Health and Safety
Association and Hydro One Inc.
Worker
A person who performs work or supplies services for
monetary compensation.
Workplace
Any land, premises, location or thing at, upon, in or
near which a worker works.
Working Load Limit
The safe working limit for a piece of equipment,
calculated by applying a prescribed safety factor to
the breaking strength of the equipment.

WNIDCL_PR_019(H1) Attachment E 97 of 176
98 Hydro One Definitions WNIDCL_PR_019(H1) Attachment E 98 of 176
General Requirements 99
General Requirements
200 General
The first consideration of employees in the
course of their work must be given to the
safeguarding of life and the avoidance of
personal injury.
In situations where a specific rule does not
apply or where the rules themselves are not
wholly understood, specific instructions and
procedures shall be obtained from the
supervisor before proceeding with work.
These rules are mandatory and must be followed
at all times except as authorized in 201 or 206(5).
201 Rule Authority, Departures, Interpretation
and Supplementary Instructions
1. Management may authorize departure from a
rule when:
a) The change protects the health and safety
of the workers at a level at least equal to
the protection that would otherwise be
provided by the rule; and
b) The appropriate employee representative
and the JHSC agree to the departure; and
c) The rule departure must be documented
and a copy sent to Vice-President Health
Safety & Environment who will forward it to
the Joint Interpretation Team (Hydro One,
PWU and Society).
WNIDCL_PR_019(H1) Attachment E 99 of 176
100 Hydro One Safety Rules – Section 2
2. The process for resolving disagreements on
the interpretation of a rule starts with the
issue being referred to the local JHSC. If it
cannot be resolved by the JHSC the question
can be referred to the Business Unit safety
contact. If necessary, the Business Unit can
get further assistance from the Joint Interpretation
Team (Hydro One, PWU and Society).
3. In addition to the Hydro One Safety Rules,
Supplementary Instructions may be issued
for specified locations or work groups and
must be followed. These instructions must
conform to the Hydro One Safety Rules.
Note: Refer to the Hydro One Document
System (HODS) for specific procedures
for rule departures, interpretations, and
changes.
202 Workers’ Knowledge of Rules
Workers shall have a copy of these safety rules
and become thoroughly familiar with and observe
all current rules applicable to their particular duties
and to the duties of any worker they supervise.
203 Personal Conduct
1. Drinking intoxicants or using illegal drugs in
the workplace is prohibited.
2. A worker under the influence of any drug,
which may inhibit their safe work
performance, shall not be permitted to work.
WNIDCL_PR_019(H1) Attachment E 100 of 176
General Requirements 101
3. Workers must not bring or permit anyone
else to bring intoxicants or illegal drugs to any
Hydro One workplace.
4. Workers are not to engage in any pranks,
contests, feats of strength, unnecessary
running or rough and boisterous conduct in
the workplace.
204 Physical and Other Limitations
Workers shall inform their supervisor of any
physical, personal or other limitations that may
reduce their ability to work safely.
205 Clothing, Jewelry and Long Hair
1. Loose clothing, jewelry & long hair must not
be worn while working around moving parts.
2. Jewelry must not be worn where it might
cause a hazard around rotating parts, or any
other potential entanglement.
3. Long hair, including facial hair, must be
suitably confined to avoid entanglement with
any moving parts.
206 Emergency Response
1. Workplaces must have emergency plans
and these plans shall be posted in a
conspicuous location in the workplace.
WNIDCL_PR_019(H1) Attachment E 101 of 176
102 Hydro One Safety Rules – Section 2
2. Workers must be instructed in the local
emergency plans.
3. Workers must participate in emergency plan
practice at regular intervals, as prescribed by
the regulations, local bylaws, or local
management.
4. Workers must comply with the orders of civil
authorities in declared emergencies.
5. Should an emergency make it necessary to
deviate from these safety rules, the worker(s)
performing the work shall take every precaution
reasonable in the circumstances, provided it is
within their level of competence, to protect the
worker(s) and the general public by maintaining
a safe work environment.
6. If a worker takes immediate action in an
emergency to safeguard life or property, it
must be followed promptly with a report to
their supervisor, stating the action taken and
the reasons for it.
207 Safe Conditions for Work
No work shall be done on,
electrical power apparatus; or
mobile or fixed equipment; or
mechanical equipment or systems;
WNIDCL_PR_019(H1) Attachment E 102 of 176
General Requirements 103
which may have electrical, dynamic, or potential
energy, unless safe conditions for work are
provided by one or more of the following:
a) The equipment is isolated and de-energized
in accordance with the Utility Work
Protection Code; or
b) Worker protection is provided by an
Approved Isolation Procedure, or
c) Worker protection is provided by an
Approved Practice, and the work is
performed by a competent person, or
d) The equipment is physically removed from
the immediate vicinity of any source of
electrical, dynamic, or potential energy, has
no ready means of connection, and has had
any stored energy already discharged.
208 Isolation, De-Energizing, Locking and
Tagging Practices
1. All apparatus capable of being made
dynamically alive or charged must be
treated as energized until it has been
positively confirmed to be isolated and de-
energized.
2. All isolating, de-energizing, tagging and locking
of devices must comply with the provisions of
the Utility Work Protection Code.
WNIDCL_PR_019(H1) Attachment E 103 of 176
104 Hydro One Safety Rules – Section 2
209 Guarding and Safety Interlocking for
Personnel Protection
1. Guards and interlocks provided for safety
must not be removed except for
troubleshooting and/or testing, and approved
work procedures must be used to protect
employees and the public from any exposed
hazards.
2. Safety interlocks must not be bypassed by
the use of devices such as jumpers or spare
keys except for the following situations;
a) The device to be worked on or operated
and the associated interlock system are
both contained within an isolated zone.
Note: The safety interlock system must not
be bypassed before the guaranteed
isolation zone is established and it
must be returned to service before the
isolation is surrendered.
OR
b) Troubleshooting and/or testing is being
performed by competent personnel and
the following conditions are met;
a job plan identifying hazards and the
use of barriers to control these hazards
has been completed and communicated
to all members of the work group, and
WNIDCL_PR_019(H1) Attachment E 104 of 176
General Requirements 105
at least one member of the work group
remains within view of the device for
which the interlock has been bypassed
and close enough to prevent any
unauthorized personnel from entering the
work area.
Note: During energized switching
operations safety interlocks must
never be removed or bypassed,
except where an approved
documented procedure exists.
210 Tools and Protective Equipment
1. All issued tools and protective equipment
must be approved by Hydro One.
2. All tools and protective equipment must be
inspected before use.
3. Defective tools and protective equipment
must be immediately removed from service,
tagged and reported to your supervisor.
4. Inspection and maintenance (at prescribed
intervals), and operation of tools and
protective equipment, must be carried out
only by competent persons.
WNIDCL_PR_019(H1) Attachment E 105 of 176
106 Hydro One Safety Rules – Section 2
211 Personal Protective Equipment REV 01/14
1. Personal protective equipment must be
used by each employee as per the
requirements of their work activities, must be
in good condition and is intended to protect
the worker from injury when total elimination
of a hazard cannot be achieved.
2. All personal protective equipment issued
and used must be approved by Hydro One.
3. The employer must specify equipment to be
used and approved work procedures to be
followed. This includes requirements for
procuring, modifying, replacing, training,
maintaining and testing.
4. Employees are responsible for using all
personal protective equipment required by
their job and workplace. This shall include,
but not be limited to: head, eye, ear, respiratory,
hand and foot protection. The supervisor must
ensure that personal protective equipment is
used properly.
5. A worker who may be endangered by
vehicular traffic shall wear an approved high
visibility garment that covers at least his or
her upper body. If the garment used is a
nylon vest, it shall be adjustable and have a
side and front tear-away feature. In addition,
a worker who may be endangered by
vehicular traffic during night-time hours shall
wear retro-reflective silver stripes encircling
each arm and leg.
WNIDCL_PR_019(H1) Attachment E 106 of 176
General Requirements 107
212 Respiratory Protection REV 01/14
1. All workplaces that require the use of
respiratory protection must meet and comply
with, as a minimum, CSA Standard Z94.4 on
the Selection, Use and Care of Respirators.
This extends to the voluntary use of filtering
face piece respirators.
2. All compressed breathing air used with
atmosphere supplying respirators must meet
CSA Z180.1 Compressed Breathing Air
Systems, Table 1 Allowable Concentrations
of Components for Compressed Breathing
Air.
3. Self-contained Breathing Apparatus (SCBA)
use is prohibited, excluding those used for
confined space rescue.
4. Workers must be medically screened, fit-
tested where applicable and trained prior to
using a specific type of respirator approved
for the task being performed.
Note: All approved respirators must be
NIOSH certified.
5. All tight fitting face piece respirators must
achieve an effective face-to-mask seal
confirmed by quantitative or qualitative fit
testing. The wearer must be clean shaven
along the face-seal area and ensure other
Personal Protective Equipment does not
interfere with the respirator seal.
WNIDCL_PR_019(H1) Attachment E 107 of 176
108 Hydro One Safety Rules – Section 2
213 Cross-Connecting Dissimilar Systems
1. You must always use approved work
procedures when cross-connecting unlike
systems.
2. Systems that are to be cross-connected must
be properly identified prior to cross-
connection.
Note: Extreme care must be taken not to
contaminate any systems that are cross
-connected. Hazardous or adverse
conditions could arise through improper
cross-connection (e.g. the connection
of a drinking water system to the
domestic water system; connections
that would allow mixing of chemical
liquids and gases; the mixing of fluids
at different temperatures; or the
connection of systems at different
phase relationships).
214 Working Alone REV 01/14
1. A worker must not work alone when,
a) conditions for the use of fall arrest, fall
restricting or travel restraint systems are
required as per rule 300, or
b) working aloft on a straight or extension
ladder before it is tied-off, or
c) working in a confined space, or
d) working in a battery room, except for visual
inspections, or
WNIDCL_PR_019(H1) Attachment E 108 of 176
General Requirements 109
e) the conditions that restrict travelling alone
on waterways or ice as per Rule 215 are
present.
2. In all other instances when working alone and
hazards are encountered that in your opinion
make it unsafe to proceed alone, you must
not proceed. Your concern must be reported
to the supervisor, and the issue resolved.
3. When a second worker is required, he/she
must be a suitably equipped competent
worker who can perform rescue operations
including CPR and shall be available and
positioned to see the worker performing the
work. For work in a confined space, a
second worker shall be positioned
immediately outside the entrance to the
confined space and maintain constant
communication with workers.
215 Work On or Around Water (Including Ice
Travel)
When work is to be done on or around water
(including ice), the following Rules apply and
must be followed.
1. When working around water/ice and non-
standard guardrails are present, workers
doing the work must be protected by an
approved fall protection system or a
lifejacket must be worn and appropriate
rescue personnel and equipment present.
WNIDCL_PR_019(H1) Attachment E 109 of 176
110 Hydro One Safety Rules – Section 2
2. All personnel working on or near water or ice
or travelling on waterways or ice must be
trained appropriately. As a minimum, anyone
working on or near water/ice shall be trained
in rescue and resuscitation techniques.
Training shall include:
Rescue and resuscitation techniques, and
The cause, prevention and treatment of
hypothermia.
3. When working on water and travelling on ice,
a documented job plan must be developed
and communicated to each worker.
4. Travelling alone is not allowed where:
it takes place on a swiftly flowing river,
the danger of hypothermia is greater than
the danger of drowning, or
the weather conditions are adverse or are
predicted to be adverse.
5. When travelling alone is necessary and is allowed,
an emergency response plan must be prepared
and communicated in advance of the trip.
6. While traveling on waterways, an appropriate
lifejacket must be worn, unless hypothermia
is deemed to present a greater hazard than
drowning. Where hypothermia is deemed to
be a greater hazard, a personal floatation
device (PFD) (cruiser suit, immersion suit or
floater coat with ‘beaver tails’) providing
sufficient thermal protection may be worn
provided a lifejacket is also carried.
WNIDCL_PR_019(H1) Attachment E 110 of 176
General Requirements 111
Vessel (Boat) Operation
1. Anyone operating a vessel must be
competent and have the appropriate training
and certification for the vessel which they are
operating.
2. All fuelling operations must be performed in
accordance with the Liquid Fuels Handling
Regulation and Liquid Fuels Handling Code.
3. The vessel operator must ensure the correct
types of safety equipment are available on
the vessel.
Traveling on Ice
1. No travel or work on ice shall take place
unless ice evaluation demonstrates, to the
person in charge and the work group, that the
ice conditions along the entire planned route
are safe.
2. Any worker traveling or working on ice must
carry with them an ice emergency kit.
3. The minimum ice thickness for travel by;
Walking – 10 cm
Snowmobile – 18 cm
Pickup truck – 33 cm
WNIDCL_PR_019(H1) Attachment E 111 of 176
112 Hydro One Safety Rules – Section 2
216 Checking for Leaks in Equipment
When conducting a leak check, you must use
only approved devices and practices. Open
flames must not be used for leak checking, for
detecting gases or for determining air
movements.
217 Painting REV 01/14
1. Approved work procedures must be in
place for painting operations.
2. All Paints used must be approved and have
an MSDS.
3. Painting operations must only be carried out
where:
There are no sources of ignition present.
This includes but not limited to open flames,
welding and cutting torches, sparks, non -
explosion proof motors, wall heaters, etc.;
power spraying equipment is grounded, and
ventilation is adequate and functioning.
218 Abrasive Blasting Operations REV 01/14
1. Approved work procedures must be in
place for abrasive blasting operations.
2. During the blasting operations the worker shall;
wear approved face, eye and personal
protective equipment,
WNIDCL_PR_019(H1) Attachment E 112 of 176
General Requirements 113
where required, wear respiratory protection
in accordance with Rule 212,
ensure proper barriers and warning signs
are in place,
ensure proper ventilation has been
established, and
prevent open flame in the work area.
3. All blasting media must be approved.
219 Indoor Operation of Internal Combustion
Engines
Internal combustion engines shall not be
operated indoors, except with adequate air for
combustion and natural or mechanical
ventilation or with the exhaust discharged
directly to the outside atmosphere so that
exhaust gases will not accumulate.
220 Microwave Radiation
Work on or near microwave equipment must be
in accordance with allowable Limits of Exposure
to Radio Frequency Fields as specified in
current legislation, Health Canada, Document
number, Safety Code 6, “Limits of Human
Exposure to Radio frequency Electromagnetic
Energy in the Frequency Range from 3 kHz to
300GHz”.
WNIDCL_PR_019(H1) Attachment E 113 of 176
114 Hydro One Safety Rules – Section 2
221 Ionizing Radiation
1. All Hydro One employees must be protected
from the hazards of ionizing radiation in
accordance with the Atomic Energy Control
Regulations.
2. All employees who may be exposed to
ionizing radiation must be able to recognize
the hazard symbol, illustrated below by both
its unique shape and distinctive colours of
black on yellow or magenta (purple) on
yellow.
3. No person shall take part in
industrial radiography, or work
with radioactive material,
unless competent and
authorized.
4. No person shall enter a radiological zone,
approach a source of radiation, or enter an
area posted with radiation hazard symbols,
signs or barriers, unless qualified and
authorized to do so, or accompanied by a
person who is qualified and authorized.
222 Work Near Buried Services REV 01/14
1. Whenever work involves excavation, drilling,
or driving rods, you must verify the presence
and location of all underground utility
services, before you begin to work.
2 Work and travel around pipelines needs to
comply with the National Energy Board
Pipeline Crossing Regulation. 
WNIDCL_PR_019(H1) Attachment E 114 of 176
General Requirements 115
223 Craning and Rigging
1. A worker using a lifting device or rigging
equipment must never exceed the Working
Load Limit (WLL) of the device or
equipment, e.g. cranes, radial boom derricks,
hoists, shackles, slings, ropes, chains,
anchor points, etc..
2. A worker shall use only approved lifting
devices and rigging equipment.
3. All lifting devices and rigging equipment must
be inspected prior to use.
4. Inspection and maintenance of all lifting
devices shall be performed by a competent
person and as often as deemed necessary
but not less frequently than recommended by
the manufacturer and in any case, at least
once a year and a permanent record shall be
kept.
5. A lifting device shall be operated only by a
competent person, or a worker being
instructed who is accompanied by a
competent person.
6. A competent worker shall act as a signal
person with no other duties when;
the operator’s view of the intended path of
travel of any part of the lifting device or its
load is obstructed, or
it is in a location in which a person may be
endangered by any part of the lifting device
or its load.
WNIDCL_PR_019(H1) Attachment E 115 of 176
116 Hydro One Safety Rules – Section 2
7. No worker shall operate a crane or similar
hoisting device unless the worker has been
trained on the type of equipment he or she is
operating and is deemed competent and
holds appropriate certification.
224 Temporary Barriers
Barriers Used to Control Hazards
During Job Planning, all hazards in the work
area must be identified and where they cannot
be eliminated they must be controlled by the
use of approved barriers. Visual Barriers must
be used wherever practical, to identify clearly
the Safe Work Area(s) for the worker, and/or
restrict access to unauthorized people.
Barriers used to control hazards must:
be made of approved materials to protect
against the specific hazard;
be posted with the appropriate warnings;
be installed before the work begins and when
required during the performance of the work in
accordance with the job plan; and be installed
according to approved work procedures;
and
be respected by all workers.
WNIDCL_PR_019(H1) Attachment E 116 of 176
General Requirements 117
225 Power Tools REV 01/14
1. Applicable PPE must always be used when
operating portable tools.
2. Power tools must be operated in accordance
with manufacturers’ specifications and
instructions or as per Hydro One approved
work procedures.
3. Defective power tools shall not be used.
226 Adverse Weather and Lightning
1. When weather conditions make the job
unduly hazardous, work must be suspended
immediately.
2. All outdoor work performed on or near
apparatus where lightning might cause
personal injury, must be suspended
immediately, whenever an electrical storm
can be seen or heard, or whenever an
electrical storm is known to be within 25
kilometres of the work location.
227 Firearms in Corporation Vehicles
Firearms must not be carried in Hydro One
vehicles, except with authorization.
228 Training and Qualifications
1. Training and qualification standards for each
job classification must be in place.
WNIDCL_PR_019(H1) Attachment E 117 of 176
118 Hydro One Safety Rules – Section 2
2. Managers must ensure that supervisors are
competent; this includes stepped-up or
temporary supervisors.
3. Supervisors must assign work only to a
competent worker, and are responsible for
ensuring they receive appropriate training.
4. Workers who require training must bring it to
the attention of their supervisor.
229 Job Planning
1. All work must be properly planned, taking into
account personnel, approved work
procedures, equipment and the physical and
environmental conditions at the workplace.
The purpose of this process is to identify the job
steps, hazards, and appropriate barriers, also
the steps to be taken in case of an emergency.
2. A documented job plan is required for all
tasks performed at work sites where critical
hazards are present.
Note: The trade specific Job Planning folders
list the majority of critical hazards.
Identified hazards not on the folder
must be added.
3. Pre-job briefings (tailboard conferences) must
be carried out for all jobs.
WNIDCL_PR_019(H1) Attachment E 118 of 176
General Requirements 119
4. If a change is encountered in the job, work
must stop, and the new hazards must be
identified and eliminated or controlled. The
revised job plan must be communicated to
all workers before re-starting work.
230 Housekeeping
1. No object or material shall be placed, left or
stored in a location or manner that may
endanger a worker.
2. All construction site or workplace
housekeeping must be maintained in
accordance with current legislation.
231 Safety Meetings
1. Safety meetings are to be held regularly, with
the minimum frequency to be determined by
the local Joint Health and Safety Committee
(JHSC).
2. Topics for safety meetings are to be
developed in consultation with the local
JHSC. Practice sessions, such as Cardio
Pulmonary Resuscitation (CPR) and
Automated External Defibrillator (AED)
practice, do not on their own qualify as a
safety meeting.
WNIDCL_PR_019(H1) Attachment E 119 of 176
120 Hydro One Safety Rules – Section 2
232 First Aid
1. Line managers must develop and maintain an
emergency response including first aid
capability in their workplaces, with enough
first aid kits and trained first aid personnel to
meet all the requirements of the Workplace
Safety and Insurance Act and any probable
contingencies.
2. All workers working on or in proximity to
energized electrical apparatus, monitoring
confined space work, or working on or near
waterways shall be trained in first aid.
3. When trained in first aid, those employees
shall be recertified in Cardio Pulmonary
Resuscitation (CPR) and Automated External
Defibrillators (AED) annually in the presence
of a certified instructor.
4. First aid kits meeting First Aid Regulation
under the Workplace Safety & Insurance Act
standards shall be maintained and suitably
located in all workplaces and vehicles.
5. First aid topics as appropriate to the location
(e.g., first aid basics, emergency
communications, accident scene
management, location-specific emergency
plans, etc.) shall be reviewed during location
safety meetings.
WNIDCL_PR_019(H1) Attachment E 120 of 176
General Requirements 121
233 Work Site Inspections
1. Workplaces are to be inspected and, as a
minimum, meet the requirements of the
Occupational Health and Safety Act, the
Regulations for Industrial Establishments and
the Construction Projects Regulation:
a) A “worker” member of the local Joint
Health and Safety Committee (JHSC) or a
Health and Safety Representative who
represents workers, inspecting the
physical conditions of the workplace; by
performing.
b) A monthly inspection (unless the local
JHSC decides this is impractical).
If monthly inspections are impractical, the
local JHSC is to determine an appropriate
inspection schedule. This schedule must
allow for the entire workplace to be
inspected once a year and at least part of
the workplace once every month.
2. Supervisors are to conduct regular on-the-
job inspections to ensure the requirements of
the Occupational Health and Safety Act are
met.
234 Work Refusal and Work Stoppage
1. Employees must exercise their right to refuse
to do work that they have reason to believe is
likely to endanger themselves or other
workers.
WNIDCL_PR_019(H1) Attachment E 121 of 176
122 Hydro One Safety Rules – Section 2
2. Certified Joint Health and Safety Committee
members must exercise their right to
unilaterally stop work, where there is
immediate danger to an employee.
235 Incident Reporting and Investigation
1. Employees must promptly report all
incidents/accidents, (including motor
vehicle) to their supervisor.
2. Supervisors must ensure reported
incidents/accidents are documented and
processed.
3. All incidents/accidents must receive the
appropriate level of investigation.
236 Contractor Safety
1. Contractors shall work to the same
regulations and safety standards as Hydro
One employees.
2. The contract administrator or delegate shall
ensure that the contractor adheres to the
conditions of the contract.
237 Visitors
1. Each location must have policies in place
governing the admission of visitors and off-
duty employees to Hydro One premises, and
oversee their safety while they are on-site.
WNIDCL_PR_019(H1) Attachment E 122 of 176
General Requirements 123
2. All visitors must be equipped with
appropriate, approved, personal protective
equipment.
3. No person younger than 16 years of age shall
be permitted to be present in or about the
workplace of a Construction Project, while
work is being performed.
4. The person-in-charge of the work location to
be entered must be notified before entry.
5. Employees working in locations other than
their regular work location must check in and
out with the controlling authority of that
work location.
6. Employees visiting other work locations must
be informed of both the appropriate local
rules and of site hazards to which they may
be exposed, or, be accompanied by a
competent person from that site during the
visit.
WNIDCL_PR_019(H1) Attachment E 123 of 176
124 Hydro One Safety Rules – Section 2 WNIDCL_PR_019(H1) Attachment E 124 of 176
Falling Hazards 125
Falling Hazards
300 Fall Protection REV 01/14
1. Approved fall protection equipment must be
used continuously when there is a hazard of
falling:
more than three (3) metres; or
more than 1.2 metres, if the work area is
used as a path for a wheelbarrow or similar
equipment; or
into operating machinery; or
into or onto a hazardous substance or
object; or
into water or another liquid; or
through an opening on a work surface.
2. Workers shall be adequately protected from
fall hazards through the use of an approved
guardrail system.
3. Despite subsection (2) where it is not
reasonably practicable to install a guard rail
system, workers shall be protected by at
least one of the following methods of fall
protection:
a) Travel restraint system,
b) Fall restricting system including fall
restricting system used for wood pole
climbing,
c) Fall arresting system, or
d) Safety net.
WNIDCL_PR_019(H1) Attachment E 125 of 176
126 Hydro One Safety Rules – Section 3
4. a) Except as provided in 4b, a full body
harness is mandatory in all fall arrest
(FAS), fall restrict (FRS) and travel
restraint systems (TRS).
b) A full body harness is not required when
using fall restrict equipment (FRE) for
climbing wood poles and trees.
5. Where continuous fall protection cannot be
used because it creates additional risk, line
management shall establish approved work
procedures for those tasks.
6. Fall protection system components which
have been involved in a fall incident shall be
immediately removed from service. No
component of the system shall be used again
by a worker unless it has been certified by
the manufacturer or manufacturer agent as
being safe for re-use.
7. Approved anchor points must be used and
be located to minimize the pendulum effect.
8. Lifelines must be attached to anchor points
independent of the primary load line. That is,
suspended platforms must have a second
independent means of support for each
person on the device. When a horizontal
lifeline is used, more than one lifeline can be
anchored to it, if it is designed for this
purpose.
9. Lanyards and lifelines shall not be used in
such a way that it is likely to be burnt, cut,
chafed or abraded.
WNIDCL_PR_019(H1) Attachment E 126 of 176
Falling Hazards 127
10. A documented rescue and evacuation plan
is mandatory wherever fall protection
systems are used. To remain competent,
applicable rescue and evacuation procedures
must be practiced at least annually.
11. All workers who may use a fall protection
system shall be trained in its use and be
given adequate oral and written instructions
by a competent person. Records indicating
proof of training are to be kept.
12. No user modifications are allowed to any fall
protection equipment.
13. All fall protection equipment must be
inspected by a competent worker before
each use. Defective equipment shall be
removed from service.
14. All fall protection equipment shall be
inspected and documented by a competent
worker annually.
301 Guardrails and Floor Opening Covers
1. All openings in floors, roofs or other surfaces
to which people have access, must have an
approved guardrail system in place or a
cover securely fastened, adequately
identified as covering an opening and strong
enough to withstand any load that may be
applied to it.
WNIDCL_PR_019(H1) Attachment E 127 of 176
128 Hydro One Safety Rules – Section 3
2. The perimeter, open sides and ends of roofs
and other surfaces where people could fall
must have guardrails or an appropriate travel
restraint system.
3. Access to roofs and other surfaces where
people could fall must be controlled if
guardrails or appropriate travel restraints are
not provided.
4. Guardrails must meet all requirements of the
Regulations for Industrial Establishments and
Regulations for Construction Projects under
the Occupational Health and Safety Act.
302 Raising and Lowering of Tools and Material
1. An approved handline must be used for
raising or lowering tools and material to
workers on structures (approved tool bags
may be used in conjunction with the handline).
2. Any rope being carried aloft by a worker or
attached to an anchor point on a structure
where workers are present shall be
appropriately controlled.

IF the hazard is . . . THEN the rope must be controlled by . . .
Vehicular or
pedestrian traffic,
and any part of
the rope reaches
the ground or
could be
contacted by the
traffic
A second worker, positioned to
prevent any part of the rope from
making contact with all vehicular
or pedestrian traffic and/or
The use of protective barriers,
barricades, warning signs or
other effective barriers
WNIDCL_PR_019(H1) Attachment E 128 of 176
Falling Hazards 129
3. Articles must not be thrown to workers aloft and
must not be thrown or dropped to the ground.
4. Portable Tool bags (nose bags) must not be
suspended from the workers belt.
303 Overhead Protection – General
Requirements
Where the risk of falling material presents a
hazard, overhead protection must be provided.
Where this is not practicable, the hazardous
area shall be identified in the job plan and shall
be protected by appropriate barriers.
304 Portable Ladders
Portable Ladders - General REV 01/14
1. Only approved ladders shall be used.
2. A worker must maintain 3 point contact so
that both hands are used when climbing up
or down a ladder. A handline must be used
for handling material.
3. When climbing and working from a portable
ladder, the ladder shall be securely placed,
held, or tied to prevent slipping or falling.
4. Substitutes for ladders, such as boxes and
crates, must not be used.
5. Portable ladders shall be inspected for
defects before use. Ladders that cannot be
repaired must be destroyed.
WNIDCL_PR_019(H1) Attachment E 129 of 176
130 Hydro One Safety Rules – Section 3
6. Place ladders on a level, stable and
substantial base before use, and never place
on movable objects.
7. Portable ladders must not be used as a
horizontal work platform unless specifically
designed for that purpose by the
manufacturer, and used following approved
work practices.
8. Ladders must not be placed in front of a door
that opens toward the ladder unless the door
is locked, blocked or guarded.
9. Portable ladders are to be used by only one
person at a time unless specifically designed
for that purpose by the manufacturer, and
used following approved work practices.
10. All workers who may use a portable ladder
are required to be trained in its use and be
given adequate oral and written instructions
by a competent person. Records indicating
proof of training are to be kept.
11. The centre line of a worker’s body (belt
buckle) must stay within the side rails of the
ladder.
WNIDCL_PR_019(H1) Attachment E 130 of 176
Falling Hazards 131
Straight Extension Ladders
12. Straight and extension ladders must be tied
off. If this is not practical, the ladder must
be held in place by one or more people at
all times while in use.
13. Performance of work while standing on a
ladder is only permissible when the worker
is secured by an approved safety belt and
pole strap, or a fall-arresting system.
14. The base of the ladder must be placed in
such a way that it is between one-quarter
and one-third of the length of the ladder
from the vertical plane supporting the top
(see drawing on next page).
15. The top of the ladder must extend at least
900 mm (36 in) beyond the supporting point
when used as access to an elevated work
area.
16. You must not climb so that your feet are
positioned higher than the third rung from
the top of the straight or extension ladder.
17. You must not lash ladders together to
increase length.
18. Do not take extension ladders apart to use
sections separately.
WNIDCL_PR_019(H1) Attachment E 131 of 176
132 Hydro One Safety Rules – Section 3
Proper Ladder Placement

90 cm
(3')
30 cm
(12")
90 cm
(3')
A
B
Distance B is
equal to 1/4 to 1/3
of Distance A
Tie-off
Point
WNIDCL_PR_019(H1) Attachment E 132 of 176
Falling Hazards 133
Step Ladders
19. Before use, step ladders must be fully
opened and set level on all four feet, with
spreaders locked in place.
20. You must not climb so that your feet are
positioned higher than the second step
from the top of a step ladder.
Metal Ladders
21. All portable metal ladders must have the words
“Not to be used for electrical work” sten-
cilled clearly on the outside faces of both
rails.
305 Scaffolds
Scaffolds - General REV 01/14
1. Scaffolding must adhere to all require-
ments prescribed in regulations under the
Occupational Health and Safety Act.
2. A guardrail system that meets the require-
ments of the Occupational Health and
Safety Act shall be used if a worker has
access to the perimeter or an open side of
a scaffold and is exposed to a fall of 2.4
metres or more.
3. The construction, alteration or dismantling
of a scaffold must be carried out under the
supervision of a competent person.
4. Scaffolds must be inspected before use by
a competent worker, for defects and
adequacy of construction.
WNIDCL_PR_019(H1) Attachment E 133 of 176
134 Hydro One Safety Rules – Section 3

5. Workers shall not remain on a scaffold
while it is being moved.
6. Any work platform or scaffold must be
constructed to withstand all loads to which it
will be subjected and the maximum load
must be clearly posted on the scaffold.
7. At the job planning stage, consideration
must be given to the anticipated maximum
load to which the scaffold will be subjected.
8. Do not stack brick, tile, block or similar ma-
terial higher than 60 cm (2 feet) on the scaf-
fold deck.
9. Do not rig from the scaffold, handrails, mid-
rails or braces, except for the purpose of
erecting the scaffold.
10. Parts and sections of scaffolds from differ-
ent manufacturers must not be inter-
changed.
11. Scaffolds must receive periodic inspections
for over-stressed components, deteriorated
components or other defects, which may
cause a hazard.
Decking
12. Only approved scaffold decking must be
used as per the Occupational Health and
Safety Act and Regulations.
13. Scaffold decking must not be used for any
other purpose.
WNIDCL_PR_019(H1) Attachment E 134 of 176
Falling Hazards 135
306 Suspended Platforms (Swing stages,
boatswain [‘bosn’] chairs, floats and needle
beams)
Construction, inspection, alteration or
dismantling of suspended platforms must
adhere to all requirements of the Construction
Projects Regulations under the Occupational
Health & Safety Act.
WNIDCL_PR_019(H1) Attachment E 135 of 176
136 Hydro One Safety Rules – Section 3 WNIDCL_PR_019(H1) Attachment E 136 of 176
On-Road Vehicle Operations 137
On-Road Vehicle Operations
400 Legislation
All drivers driving vehicles on Hydro One
business regardless whether the vehicle is
company owned, leased, rented or privately
owned, must comply with all requirements of the
Highway Traffic Act and its regulations.
401 Possession of a Valid Driver’s License
Drivers must possess a valid driver’s license:
a) of the appropriate class issued by the Ontario
Ministry of Transportation for the vehicle
being operated,
b) or a valid equivalent out-of-province license,
for the vehicle being operated,
Note: The above requirements include
Corporate, leased and personal
vehicles while on company business.
402 Condition of Vehicle REV 01/14
For all Hydro One owned or leased vehicles, the
log book(s) must be filled out indicating
inspection completed and recording any
deficiencies. The inspection shall include any
towed equipment. These deficiencies must be
reported to the supervisor.
WNIDCL_PR_019(H1) Attachment E 137 of 176
138 Hydro One Safety Rules – Section 4
1. All Hydro One owned or leased vehicles
must be inspected daily and recorded in the
Transportation & Work Equipment Log Book.
2. For vehicles having a gross weight or registered
gross weight of more than 4,500 kilograms, a
pre-trip inspection as per Highway Traffic Act
and regulations requirements shall be completed.
3. All vehicles used on company business must
be in safe working condition. This includes
privately owned vehicles.
4. Wheel fasteners on Hydro One owned and
leased vehicles which have been removed
and reinstalled for tire repair or other reasons
must be re-torqued as per Hydro One
standard.
403 Driver Training
1. All employees whose job requires that they
drive for work require mandatory training.
Managers may require and provide additional
driver training depending on local requirements.
2. Supervisors must arrange for employees to
have an orientation session before being
allowed to drive any company vehicle
licensed as commercial, for the first time.
3. All employees must attend one safety
meeting per year that is devoted to
“Defensive Driver Training”.
WNIDCL_PR_019(H1) Attachment E 138 of 176
On-Road Vehicle Operations 139
404 Unauthorized Passengers
Unauthorized passengers (those not employed
by Hydro One) shall not be permitted to ride in a
company owned, rented or leased vehicle
except when on authorized Hydro One business
or during emergencies..
405 Authorized Operation of Vehicles &
Equipment
1. Only authorized workers shall be permitted
to drive or operate company vehicles.
2. Unauthorized use of the vehicles and
equipment is prohibited.
3. Only competent people are allowed to
inspect and maintain an on-road vehicle and
the equipment mounted on it.
4. All authorized workers shall familiarize
themselves with the operation of an on-road
vehicle prior to operating.
406 Moving in Reverse
1. Where possible all vehicles should be parked
so as to avoid the need to move in reverse.
Where moving in reverse is unavoidable:
a signal person, shall be in place to give
directions, or

WNIDCL_PR_019(H1) Attachment E 139 of 176
140 Hydro One Safety Rules – Section 4
if a signal person is not available, the driver
must take all necessary precautions, to
ensure the reverse path is clear which may
include getting out of the vehicle if necessary.
2. Before moving in reverse the driver shall
sound the vehicle horn twice.
Note: You are not required to sound the horn
if the vehicle is equipped with an
approved and functional exterior
audible backup warning device.
407 Load Charts and/or Data Plates for Vehicle-
Mounted Equipment
1. All load charts and/or data plates must be
manufacturer or engineer approved, legible
and posted where the operator can readily
view the information while operating the
equipment.
2. The Working Load Limits specified on a
load chart and/or manufacturer’s data plate
must never be exceeded.
408 Headlights
While on Hydro One business, when not equipped
with daytime running lights, headlights must
always be on while vehicle is in motion.
WNIDCL_PR_019(H1) Attachment E 140 of 176
On-Road Vehicle Operations 141
409 Roadway Work Operations
Roadside operations must be in accordance
with Ontario Ministry of Transportation and the
Occupational Health & Safety Act/Regulations
requirements. The appropriate Ontario Traffic
Control Manual for Roadway Work Operations
must be followed for all roadside work and the
traffic plan shall be included in documented job
plans.
410 Adverse Weather and Fatigue
1. To ensure that no driving is done while a
driver is overly tired, the Highway Traffic Act’s
regulation pertaining to hours of work while
on duty and driving, must be followed.
2. No driver shall operate a vehicle during
adverse weather conditions that they have
reason to believe is likely to endanger
themselves or others.
411 Emergency Safety Equipment
All Hydro One work vehicles (owned, rented or
leased) shall be equipped with a first aid kit, a
fire extinguisher, emergency blanket and safety
triangles.
WNIDCL_PR_019(H1) Attachment E 141 of 176
142 Hydro One Safety Rules – Section 4
Note: This rule does not apply to rental cars,
personal vehicles, etc. used to attend
meetings or job sites. Consideration
should be given to the need for
emergency equipment particularly in
winter when your travel takes you some
distance from emergency response
capability.

WNIDCL_PR_019(H1) Attachment E 142 of 176
Off-Road Vehicle Operations 143
Off-Road Vehicle Operations
500 Legislation REV 01/14
All legislated safety requirements and
manufacturers’ operating requirements must be
followed.
These may include requirements for:
a) roll over protection;
b) maximum load weights;
c) head protection;
d) seat belts; and
e) appropriate training prior to operating.
501 Authorized Operation REV 01/14
1. Off-road vehicles shall only be used for
work for which they are intended and
approved, and approved work procedures
shall be followed.
2. Only authorized workers shall be permitted
to drive or operate company vehicles.
3. Unauthorized use of the vehicles and
equipment is prohibited.
4. Only competent workers are allowed to
inspect and maintain an off-road vehicle and
the equipment mounted on it.
WNIDCL_PR_019(H1) Attachment E 143 of 176
144 Hydro One Safety Rules – Section 5
5. All workers whose job requires that they
operate an off-road vehicle require training,
a unit specific orientation session and must
familiarize themselves before being allowed
to operate any off-road vehicle.
502 Passengers
1. Only vehicles designed to carry passengers
shall be used for that purpose.
2. Unauthorized passengers (those not employed
by Hydro One) shall not be permitted to ride in
a company owned, rented or leased vehicle
except when on authorized Hydro One
business or during emergencies.
503 Load Charts and/or Data Plates for Off-Road
Vehicle Mounted Equipment
1. All load charts and/or data plates must be
manufacturer or engineer approved, legible
and posted where the operator can readily
view the information while operating the equipment.
2. The Working Load Limits specified on a
load chart and/or manufacturer’s data plate
must never be exceeded.
WNIDCL_PR_019(H1) Attachment E 144 of 176
Off-Road Vehicle Operations 145
504 Reference Manuals and Logs REV 01/14
1. Off-road equipment and maintenance
instruction manuals issued by the
manufacturer must be kept current and
readily available to vehicle operators and
maintainers.
2. A maintenance log book must be kept with
the equipment. All inspections, maintenance
checks and repairs must be recorded in the
log book on completion of the work. All
deficiencies must be reported promptly to
your immediate supervisor.
3. All Hydro One owned or leased vehicles
must be inspected daily and recorded in the
Transportation & Work Equipment Log
Book.
WNIDCL_PR_019(H1) Attachment E 145 of 176
146 Hydro One Safety Rules – Section 5 WNIDCL_PR_019(H1) Attachment E 146 of 176
Steam/Pressure Hazards 147
Steam/Pressure Hazards
600 Regulations
All work on steam/pressure systems must be
performed in accordance with the Technical
Standards and Safety Act, Boiler and Pressure
Vessel Regulations, and the Occupational
Health and Safety Act.
601 Approved Work Procedures
All work on pressure systems must be
performed in accordance with the appropriate
documented work procedure(s) and all existing
legislation.
602 Safety and Relief Valves
Safety and relief valves must be installed,
maintained and tested in accordance with all
legislated, manufacturer and Company
requirements which specify the type and
frequency of inspections, examinations,
servicing and testing. All inspections,
examinations, servicing and test results must be
recorded.
603 Pipework and Pressure Vessel Integrity
All high-energy pipework and pressure vessel
systems that have been assessed as having a
High Maximum Reasonable Potential for Harm if
failure occurred must have a formal inspection
program implemented.
WNIDCL_PR_019(H1) Attachment E 147 of 176
148 Hydro One Safety Rules – Section 6
604 Pressure Leaks
A defined barrier zone must be established to
restrict access to competent and suitably
equipped personnel only, near or around leaks
that have a high potential for harm.
605 Ice Plugs
Ice plugs must be made, and their pressure
holding ability verified, in accordance with
approved work procedures.
606 Cross-Connecting Pressure Systems
When cross-connecting pressure systems rated
for different pressures, you must verify that the
lower-rated system is capable of withstanding
the highest pressure to which it could be
subjected.
607 Temporary Hook Ups
All lines, fittings and equipment that are used
must be capable of withstanding the maximum
operating pressures of the system.
WNIDCL_PR_019(H1) Attachment E 148 of 176
Fire & Explosion Hazards 149
Fire & Explosion Hazards
700 Fire Safety REV 01/14
1. All workplaces must comply with the Ontario
Fire Code and the Ontario Building Code.
2. Appropriate training of all workers in fire
safety, fire prevention and fire fighting using
the available fire extinguishing equipment
must be provided.
3. Fire safety plans shall be available in an
approved location and they must be
reviewed at least annually.
701 Inspection and Maintenance of Portable Fire
Extinguishers
1. All portable extinguishers shall be visually
inspected by a competent worker, at least
once per month. All defective or damaged fire
extinguishers shall be repaired or replaced.
2. All portable fire extinguishers shall be subjected
to maintenance procedures by a competent
worker at least once per year or whenever a
visual inspection determines the need.
3. The inspection and maintenance shall document:
a) monthly on a tag or label the date and
inspector initials;
b) annually for all maintenance in a
permanent record for each portable fire
extinguisher.
WNIDCL_PR_019(H1) Attachment E 149 of 176
150 Hydro One Safety Rules – Section 7
702 Automatic Fire Suppression System Hazards
1. All systems must be equipped with approved
devices to prevent inadvertent operation.
Signs must be posted at locations protected
by automatic fire extinguishing systems to
alert workers to the potential hazards.
2. Before working in any enclosure, which is
protected by oxygen depleting fire
suppression systems, the blocking device
must be activated to render the system
inoperable and the controlling authority
must be so notified.
3. When an automatic extinguishing system or
any part thereof is shut down, all potentially
affected workers and their supervisors must
be notified.
4. When a gas system has been discharged, all
personnel in the vicinity must be evacuated
and accounted for. The enclosure may only
be re-entered when the atmosphere is tested
and found to be safe, or other approved
procedures are followed.
703 Transportation and Use of Explosives
Only a competent worker or a worker who is
working under the direct personal supervision of
a competent worker shall handle, transport,
prepare and use explosives on a project and
must comply with current legislation.
WNIDCL_PR_019(H1) Attachment E 150 of 176
Fire & Explosion Hazards 151
704 Source of Ignition
Sources of ignition including static charges must
be excluded from the immediate vicinity of any
potentially explosive atmosphere.
705 Batteries
1. Never short the two poles of a battery
together.
2. Ensure that all waste batteries are disposed
of as stipulated by Provincial legislation.
3. “Danger No Smoking or Open Flames” and
“Explosion Hazard” signs must be
conspicuously displayed wherever wetcell
and gelcell (Valve Regulated Lead Acid)
batteries are installed.
Note: Where the room is partitioned, only the
part of a room containing the batteries
is considered the battery room.
4. All battery rooms must be suitably ventilated
to minimize the chance of hazardous gas
accumulation.
5. Whenever inspecting or maintaining
batteries, suitable emergency response
equipment, including eye wash station(s),
must be available in or near all battery rooms.
WNIDCL_PR_019(H1) Attachment E 151 of 176
152 Hydro One Safety Rules – Section 7
706 Handling and Storage of Flammable and
Combustible Liquids
1. Flammable and combustible liquids must be
handled in accordance with the information
provided in the Material Safety Data Sheets.
2. Gasoline must be stored in accordance with
the requirements of the Liquid Fuels Handling
Regulation and Liquid Fuels Handling Code.
Other flammable liquids must be stored in
accordance with the Regulations under the:
Occupational Health and Safety Act, and
Ontario Fire Code.
3. Gasoline must not be used for cleaning.
4. Only approved safety cans may be used for
the storage of flammable liquids.
707 Transportation of Flammable Liquids to and
from the Workplace
Sealed containers must be used to transport
flammable liquids to and from the workplace.
Note: A metal safety can is not a sealed
container and is not suitable for
transportation of flammable liquids in
enclosed vehicles.
WNIDCL_PR_019(H1) Attachment E 152 of 176
Fire & Explosion Hazards 153
708 Dispensing of Flammable Liquids
1. A portable container used for dispensing
flammable liquid in a work area shall be
made of material suitable to provide for the
safety of all workers and have a spring-
loaded cap and a flame arrester.
2. When dispensing flammable liquids, the
containers shall be bonded together to
prevent a static spark.
3. Approved ULC/CSA plastic containers may
be used to dispense gasoline outdoors only
into fuel tanks. There is no need to transfer
gasoline from a plastic container to a metal
safety can or a need to bond the containers
together.
709 Handling of Compressed Gases
1. The transportation, handling, storage and
utilization of compressed gases must be in
accordance with Transportation of Dangerous
Goods Act (TDGA), Occupational Health and
Safety Act (OHSA) and the Workplace Hazardous
Materials Information System (WHMIS).
Note: Fire extinguishers are not considered
compressed gas cylinders.
2. All compressed gas cylinders must be
secured in an upright (vertical) position during
transportation, storage, and use.
WNIDCL_PR_019(H1) Attachment E 153 of 176
154 Hydro One Safety Rules – Section 7
3. When means are provided on a cylinder, the
valve protection cap must be in place when
the cylinder is not in use.
4. Compressed gas cylinders must be tagged,
labeled or stenciled in accordance with
TDGA, OHSA and WHMIS.
5. Compressed gas cylinders must be protected
from physical damage and never rolled, slid
or dropped.
6. Workers must verify that the correct gas is
being used before connecting a compressed
gas cylinder to a system.
7. Leaking oxygen or fuel gas cylinders are
dangerous and must be taken out of service
immediately. The cylinders must be
transported to an isolated, well-vented
outdoor location and valves opened slightly to
allow gas to escape. Obvious warning signs
must be posted to prohibit smoking and open
flames in the area. When emptied, the faulty
cylinder must be tagged as “DEFECTIVE”
and promptly returned to the supplier for
repair.
8. Do not use lubricants on cylinder fittings.
710 Transportation of Compressed Gases
1. Propane cylinders having a capacity of less
then 2 kg may be transported within a
vehicle, providing the cylinder is stored within
an enclosed metal cabinet or container.
WNIDCL_PR_019(H1) Attachment E 154 of 176
Fire & Explosion Hazards 155
2. With the exception of those cylinders
containing less than 2 kg of propane,
compressed gas cylinders being carried in or
on Hydro One vehicles must be in the upright
or vertical position, be properly secured to
prevent damage, and have the valve
protection cap securely in place, if allowance
is made for one.
3. Cylinders with flammable contents must be
transported outside the passenger
compartment of a vehicle or in metal cabinets
that are vapour tight and secured to the
inside of the vehicle or other vehicle
compartments. Cabinets must be equipped
with a minimal 100 cm vent at ceiling and
floor level. Care must be taken to ensure that
vents terminate at a point outside of the
vehicle and away from any source of ignition
on the vehicle.
4. All vehicles transporting compressed gases
must be equipped with a fire extinguisher
located so as to be readily accessible but not
immediately adjacent to the compressed gas
cylinder.
WNIDCL_PR_019(H1) Attachment E 155 of 176
156 Hydro One Safety Rules – Section 7
711 Storage of Compressed Gases
General
1. Propane must be segregated from other
types of flammable compressed gas cylinders
(e.g., hydrogen, acetylene) by at least 1
meter and at least 6 meters from flammable/
combustible liquids, oxidizing, toxic or
corrosive gases.
2. Cylinders of compressed gases must be
protected against mechanical damage and
must be stored on racks or by using other
devices designed to hold them in place.
Outdoor Storage
1. Compressed gas cylinders stored outdoors
must be firmly supported on raised concrete
or other non-combustible platforms and
where a canopy is provided to protect storage
it must be constructed of non-combustible
material. The outdoor storage must be located
the required distance from any building.
Indoor Storage
1. Cylinders containing flammable and non-
flammable compressed gases must be stored
according to legal requirements.
2. Only one cylinder of a flammable compressed
gas heavier than air may be located in any one
room of a building and they must not be located
in basements or other areas below grade. (This
does not include the fuel cylinders mounted on
industrial trucks).

WNIDCL_PR_019(H1) Attachment E 156 of 176
Confined Spaces 157
Confined Spaces
800 Legislation REV 01/14
All work in confined spaces shall be performed
by an authorized worker(s) in accordance with
a documented confined space program and
appropriate documented work procedure(s) as
required by Ontario Regulation.
801 Confined Space Program REV 01/14
The Hydro One confined space program shall
include the following key areas:
1. Facility design and equipment specifications,
2. Evaluation and identification of confined
spaces,
3. Confined space entry procedure(s),
4. Requirements for contractors,
5. Multi-employer entries,
6. Training,
7. Evaluation of compliance,
8. Records, and
9. Documentation.
WNIDCL_PR_019(H1) Attachment E 157 of 176
158 Hydro One Safety Rules – Section 8 WNIDCL_PR_019(H1) Attachment E 158 of 176
Hazardous Agents 159
Hazardous Agents
900 Hazard Materials Management REV 01/14
Hazardous agents must be managed in accord-
ance with current legislation, the Workplace
Hazardous Materials Information System, the
Transportation of Dangerous Goods Act and
Hydro One Work Practices. The managed
system must include such items as:
1. Approval is required for the procurement of
hazardous agents.
2. Approved work practices must be in place
for the storage, transportation and disposal of
all hazardous waste materials.
3. An inventory of all hazardous materials used
in each workplace must be created and
maintained.
4. Material Safety Data Sheets must be made
available by the employer in the workplace
in such a manner as to allow examination by
the workers.
5. All containers of hazardous materials must
have the appropriate supplier or workplace
label.
6. All workers who may work with or in
proximity to hazardous/controlled materials,
must receive training in the use, storage,
handling and emergency procedures for
each hazardous product they handle.
WNIDCL_PR_019(H1) Attachment E 159 of 176
160 Hydro One Safety Rules – Section 9
7. Each workplace must perform an
assessment of all hazardous/controlled
products in the workplace at least once per
year. Priority must be given to very toxic
materials with the mandate to eliminate/
replace if possible or reduce its use.
901 Heat/Cold Stress REV01/14
During periods of extreme temperature (hot or
cold), the job plan must include hazards
associated with extreme temperature and must
consider such items as;
ambient temperature,
relative humidity,
air flow,
work load and duration,
clothing and personal protective equipment
requirements,
workers general health and medications
being used,
recognition of temperature stress and strain,
and
emergency response plan.
WNIDCL_PR_019(H1) Attachment E 160 of 176
Hazardous Agents 161
902 Noise Control
1. Approved hearing protection must be worn
whenever a worker is exposed to a sound
level of 85 decibels or greater.
Note: All Hearing protection must meet
requirements of CSA Standard Z94.2 ,
Hearing Protection.
2. Warning signs must be posted in areas and
on equipment where the noise level exceeds
85 dB(A). A sound level survey must be
repeated, if conditions change.
3. All “noise exposed workers” (exposure
exceeding 85 dB(A)) must receive periodic
hearing tests.
4. Noise must be managed by using
engineering controls, where practical, to
reduce noise levels and consideration must
be given to noise levels in the purchase of all
new equipment.
WNIDCL_PR_019(H1) Attachment E 161 of 176
162 Hydro One Safety Rules – Section 9 WNIDCL_PR_019(H1) Attachment E 162 of 176
Appendix 1 163
Appendix 1
Acts and Regulations
The following list of reference material includes
applicable Acts and Regulations for workers in the
Province of Ontario and should be accessed when
additional information is required. This list, though
extensive, may not be complete.
Provincial Legislation
Occupational Health and Safety Act and Regulations
Technical Standards and Safety Act
Boilers and Pressure Vessels Regulation and
Operating Engineers Regulation
Building Code Act
Coroners Act
Elevating Devices Regulation
Liquid Fuels Handling Regulation and Liquid Fuels
Handling Code
Environmental Protection Act
Pesticides Act
Fire Protection and Prevention Act and Fire Code
Highway Traffic Act and Regulations
Motorized Snow Vehicles Act and Regulations
Off-Road Vehicles Act
Ontario Electrical Safety Code
Smoking in the Workplace Act
Workplace Safety and Insurance Act
WNIDCL_PR_019(H1) Attachment E 163 of 176
164 Hydro One Safety Rules
Federal Legislation REV 01/14
Atomic Energy Control Act and Regulations
Canada Shipping Act and Regulations
Explosive Act and Regulations
The Hazardous Products Act and WHMIS
Regulations
Transportation of Dangerous Goods Act and
Regulations
National Energy Board Pipeline Crossing
Regulation
WNIDCL_PR_019(H1) Attachment E 164 of 176
165
Index
Abrasive Blasting Operations .............................. 112
Accident Reporting .............................................. 122
- also see incident reporting and investigation
Alcohol (Intoxicant) ............................................. 101
Anchor Point .......................... 51, 80 , 115, 126, 128
Arc Flash ......................................................... 21, 38
Authorization for Work .......................................... 33
Backfeed ............................................................... 86
Barriers ... 33, 34, 52, 56, 60, 64, 113, 116, 118, 128
Batteries .............................................................. 151
Body Harness ............................................... 80, 126
Boilers ..................................................................154
- also see Pressure Vessels
Breathing Apparatus ........................................... 107
Buried Services ....................................... 81, 82, 114
- also see Underground Cables
Clothing
Loose Clothing around Moving Parts ............ 101
Arc Flash Flame Resistant and High Visibility .. 38
High Visibility ................................................. 106
Cold Hazard ........................................................ 160
Combustion Engine ............................................. 113
Communication ................................. 46-47, 79, 109
Competent - Definition .............................. 23, 24, 90
WNIDCL_PR_019(H1) Attachment E 165 of 176
166
Compressed Gases ..................................... 153-155
Conductor
Conductor Insulation ....................................... 85
Definition ......................................................... 23
Neutral Conductors ......................................... 41
Confined Space ........... 24, 46, 80, 91, 107-120, 157
Contractor ..................................................... 91, 122
Controlling Authority 24, 35, 42, 44, 52, 91, 123, 150
Cord Connected Electrical Equipment ................. 85
Cover Up .................................................. 60, 64, 69
Craning ............................................................... 115
De-Energize ............................... 24, 41, 43, 91, 103
Decking .............................................................. 134
Dedicated Observer ................................. 24, 60, 77
Defensive Driver Training ................................... 138
Driver Orientation ............................................... 138
Driver’s License .................................................. 137
Drugs ........................................................... 100-101
Emergency
EUSR ........................................ 25, 33,36-37, 48
Hydro One ....... 92, 101, 110, 118, 141, 151, 159
Explosive ...................................................... 90, 150
Eye Protection ...................................................... 39
Fall Protection ............................................. 125-127
Fatigue and Driving ............................................ 141
Fire .................................................... 92, 149, 150
Firearms ............................................................. 117
WNIDCL_PR_019(H1) Attachment E 166 of 176
167
First Aid ................................................. 36, 120, 141
Flame Resistant Clothing ....................................... 39
Gasoline ...................................................... 152-153
- also see Combustion Engines
Ground Gradient Control Mat ................................ 50
Grounding ................................................. 43, 79, 86
Guarding and Safety Interlocking ............ 55, 96-104
Guardrails ............................................. 55, 127-128
Guns .................................................................. 117
Hair ............................................................ 33, 101
Hazardous Agents .............................................. 159
Hearing Protection .............................................. 161
Heat Stress ......................................................... 160
Holder ............................................................. 27, 43
Housekeeping ..................................................... 119
Ice Plugs ............................................................. 148
Ice Travel .................................................... 109, 111
Incident Reporting and Investigation ................... 122
Induction .................................................... 27, 42, 93
Inspections
In Battery Rooms ............................................. 46
Of Aerial Devices, Boom Trucks ...................... 48
Of Cables ......................................................... 82
Of Fall Protection ........................................... 127
Of Pipework and pressure Vessels ............... 147
Of Protective Equipment .................. 67, 105-106
Of Rubber Gloves ...................................... 68, 71
WNIDCL_PR_019(H1) Attachment E 167 of 176
168
Inspections continued
Of Scaffolds .................................................. 134
Of Tools & Equipment ............................. 67, 105
Of Vehicles .................................................... 137
Work Site Inspections ................................... 121
Interlocks ........................................ 29, 55, 104-105
- see Safety Interlock
Intoxicants or Illegal Drugs ..................... 32, 100-101
Isolated .......................................... 27, 40-41, 55, 94
Jewelry ................................................... 33, 72, 101
Job Planning ............... 33-35, 42, 116, 118-119, 134
Joint Health and Safety Committee (JHSC)
Rule Departures Interpretation ...................... 100
Safety Meetings - Content and Frequency ... 119
Work Refusal ......................................... 121-122
Ladders ................................................. 83, 129-133
Leaks .......................................................... 111, 148
Lightning ........................................................ 35,117
Limits of Approach .............................. 28 - 29, 57-65
Live Line Tools ....... 43,48, 53, 54, 67-70, 77, 81, 86
Live Line Work .................... 28, 41-42, 48-50, 67, 95
Load Chart .................................................. 140, 144
Maintenance
Fire Extinguishers ......................................... 149
FRP/Rubber ............................................... 67-68
Lifting Devices ............................................... 115
Off-Road Equipment ..................................... 143
On-Road Vehicles .................................. 137-139
WNIDCL_PR_019(H1) Attachment E 168 of 176
169
Maintenance continued
Safety & Relief Valves ................................... 147
Tools & Protective Equipment ........................ 106
Maintenance Chamber ......................................28, 83
Material Safety Data Sheet ...........................152, 159
Microwave Equipment ......................................... 113
Neutral Conductors ............................................... 41
Noise .................................................................. 161
Off-Road Vehicles ................................. 95, 143-145
Operating Maps .................................................... 36
Overhead Protection ........................................... 129
Painting ......................................................... 66, 112
Passengers ................................................. 139, 144
Personal Conduct ................................. 32, 100-101
Personal Protective Equipment
EUSR ......................................................... 28, 53
Hydro One ........................ 95, 105-106, 112, 123
Pipework ............................................................. 147
Planning ........................... 33-35, 110, 116, 118-119
Pressure Systems ....................................... 147-148
Pressured Gas Cylinders ........................... 153-155
- see Compressed Gas Cylinders
Qualifications .............................................. 117-118
Radiation (ionizing) ............................... 96, 113-114
Respirators .......................................................... 107
WNIDCL_PR_019(H1) Attachment E 169 of 176
170
Rigging ....................................................... 115-116
Roadside Work ................................................... 141
Rubber Blankets ................................................... 70
Rubber Gloves ............. 49, 54, 60, 66, 68, 70-76, 81
Safe Conditions for Work
EUSR .............................................................. 40
Hydro One .............................................. 102-103
Safe Limits of Approach .................................. 57-65
Safe Work Area
EUSR .............................................................. 40
Hydro One ............................................... 102-103
Safety and Relief Valves .................................... 147
Safety Interlock .......................... 29, 55, 96, 104-105
Safety Meetings .................................................. 119
Scaffolds ............................................... 83-84, 13-34
Second Point of Contact ....................................... 29
Self-Contained Breathing Apparatus .................. 107
Static Electricity .................................................... 42
Steam ........................................................... 92, 147
Suspended Platforms ................................. 126, 135
Temporary Power Cables ...................................... 85
Testing
Devices ........................................................... 44
High Voltage Testing ....................................... 45
Testing of Protective Equipment ................ 67-70
Tool Bag ....................................................... 51, 128
WNIDCL_PR_019(H1) Attachment E 170 of 176
171
Training
Barehand ................................................... 77-78
Driving ................................................... 137-138
Fire ................................................................ 149
First Aid ................................................... 36, 120
Hazardous Materials ....................... 153, 159-160
Rescue ....................................................... 37-38
Standard for Each Job ............................. 117-118
Waterways ............................................... 109-110
Transformers ............................................... 55, 85-86
Underground Cables ....................................... 81-83
- also see Buried Services
Utility Work Protection Code - Definition ............... 97
Visitors ........................................................ 122-123
Water Hazards ............................................ 109-111
Weather
Adverse Weather and Lightning
EUSR ......................................................... 35
Hydro One ................................................ 117
Driving in Poor Weather and Fatigue ............ 141
Welding ............................................................... 112
- also see Compressed Gases
Work Alone ...................................... 45-47, 108-109
Work Protection - see Utility Work Protection Code
Work Stoppage .......................................... 121-122
- also see Stop Work Agreement
Work Refusals ............................................. 121-122
WNIDCL_PR_019(H1) Attachment E 171 of 176
172 WNIDCL_PR_019(H1) Attachment E 172 of 176
HYDRO ONE
SAFETY RULES
2014
Fo
r

d
e
t
a
i
l
e
d

i
n
f
o
r
m
a
t
i
o
n

r
e
l
a
t
i
n
g

t
o

L
i
m
i
t
s

o
f

A
p
p
r
o
a
c
h

C
o
n
d
i
t
i
o
n
s
an
d

R
e
s
t
r
i
c
t
i
o
n
s

r
e
f
e
r

t
o

E
l
e
c
t
r
i
c
a
l

U
t
i
l
i
t
y

S
a
f
e
t
y

R
u
l
e

#

1
2
9

a
n
d
tra
d
e

s
p
e
c
i
f
i
c

d
o
c
u
m
e
n
t
a
t
i
o
n
.
*
Cra
n
e
s
Po
w
e
r

S
h
o
v
e
l
s
Ba
c
k

H
o
e
s
Me
c
h
a
n
i
c
a
l
Br
u
s
h

C
u
t
t
e
r
RB
D
,

A
e
r
i
a
l
La
d
d
e
r
,

W
o
r
k
Pla
t
f
o
r
m
,
Un
c
e
r
t
i
f
i
e
d
Ae
r
i
a
l

D
e
v
i
c
e
Ce
r
t
i
f
i
e
d
an
d

T
e
s
t
e
d
by
Ce
r
t
i
f
i
e
d
La
b
o
r
a
t
o
r
y
Vo
l
t
a
g
e
s
O.
H
.
S
.
A
.
Mi
n
i
m
u
m
Au
t
h
o
r
i
z
e
d
Wo
r
k
e
r
Re
s
t
r
i
c
t
e
d
Zo
n
e
Mo
b
i
l
e

W
o
r
k

E
q
u
i
p
m
e
n
t
*
No
n
-
In
s
u
l
a
t
e
d
Bo
o
m
s
Ce
r
t
i
f
i
e
d
In
s
u
l
a
t
e
d
A.
D
.
O.
H
.
S
.
A
.
Pe
r
s
o
n
n
e
l

Z
o
n
e
s
*
LI
M
I
T
S

O
F

A
P
P
R
O
A
C
H
Ma
i
n
t
a
i
n

M
a
x
i
m
u
m

C
l
e
a
r
a
n
c
e
s

a
n
d

I
n
s
t
a
l
l

B
a
r
r
i
e
r
s

W
h
e
r
e

P
r
a
c
t
i
c
a
l
>0
.
9

m

(
3

f
t
)
>3
.
0

m
>4
.
5

m
>6
.
0

m
0.
9

m

t
o

0
.
3

m
(3

f
t

t
o

1

f
t
)
75
0

V
to

1
5

k
V
0.9

m

t
o

0
.
4
5

m
(3

f
t

t
o

1
.
5

f
t
)
>1
5

k
V
to

3
5

k
V
>1
.
2

m

(
4

f
t
)
1.
2

m

t
o

0
.
6

m
(4

f
t

t
o

2

f
t
)
>3
5

k
V
to

5
0

k
V
>1
.
5

m

(
5

f
t
)
1.
5

m

t
o

0
.
9

m
(5

f
t

t
o

3

f
t
)
>5
0

k
V
to

1
5
0

k
V
>2
.
1

m

(
7

f
t
)
2.1

m

t
o

1
.
2

m
(7

f
t

t
o

4

f
t
)
>1
5
0

k
V
to

2
5
0

k
V
>3
.
7

m

(
1
2

f
t
)
3.7

m

t
o

2
.
7
5

m
(1
2

f
t

t
o

9

f
t
)
>2
5
0

k
V
to

5
5
0

k
V
>3
.
0

m
>4
.
5

m
>6
.
0

m
>0
.
9

m
(3

f
t
)
>1
.
2

m
(4

f
t
)
>2
.
4

m
(8

f
t
)
>3
.
0

m
(1
0

f
t
)
>4
.
6

m
(1
5

f
t
)
>0
.
3

m
(1

f
t
)
>0
.
4
5

m
(1
.
5

f
t
)
>0
.
9

m
(3

f
t
)
>1
.
2

m
(4

f
t
)
>2
.
7
5

m
(9

f
t
)
© 2
0
0
9
WNIDCL_PR_019(H1) Attachment E 173 of 176
1000
400
300
80
50
30
20
10
8
5
2
1
0
1 ampere
Risk of burns, severity
of which increases with
the strength of current
Breathing stops
Normal pumping of
heart can stop
(ventriculation)
Breathing very difficult,
suffocation possible
Severe shock
Muscular contractions,
breathing difficulties begin.
Cannot let go
Cannot let go
Painful shock
Trip setting for Ground
Fault Circuit Interrupter
protection
Mild shock
Head to Foot
Typical electric current
pathways that stop normal
pumping of the heart.
Less Than
1 Ampere
Can Kill!
Hand to Opposite Foot
Hand to HandThreshold of sensation
1 ma = 1/1000 of an ampere Electrically resistant
personal protective
equipment reduces the
risk of injury and death.
Current in
Milliamperes
Biological Effects of Electricity
WNIDCL_PR_019(H1) Attachment E 174 of 176
IDENTIFYthe hazard.
ELIMINATEthe hazard where practical.
CONTROLhazards that cannot be eliminated.
PROTECTagainst injury if a hazard gets out of control.
MINIMIZEthe severity of an injury if one takes place.
Safety Basics
WNIDCL_PR_019(H1) Attachment E 175 of 176
HYDRO ONE
SAFETY RULES
2014
Fo
r

d
e
t
a
i
l
e
d

i
n
f
o
r
m
a
t
i
o
n

r
e
l
a
t
i
n
g

t
o

L
i
m
i
t
s

o
f

A
p
p
r
o
a
c
h

C
o
n
d
i
t
i
o
n
s
an
d

R
e
s
t
r
i
c
t
i
o
n
s

r
e
f
e
r

t
o

E
l
e
c
t
r
i
c
a
l

U
t
i
l
i
t
y

S
a
f
e
t
y

R
u
l
e

#

1
2
9

a
n
d
tra
d
e

s
p
e
c
i
f
i
c

d
o
c
u
m
e
n
t
a
t
i
o
n
.
*
Cra
n
e
s
Po
w
e
r

S
h
o
v
e
l
s
Ba
c
k

H
o
e
s
Me
c
h
a
n
i
c
a
l
Br
u
s
h

C
u
t
t
e
r
RB
D
,

A
e
r
i
a
l
La
d
d
e
r
,

W
o
r
k
Pla
t
f
o
r
m
,
Un
c
e
r
t
i
f
i
e
d
Ae
r
i
a
l

D
e
v
i
c
e
Ce
r
t
i
f
i
e
d
an
d

T
e
s
t
e
d
by
Ce
r
t
i
f
i
e
d
La
b
o
r
a
t
o
r
y
Vo
l
t
a
g
e
s
O.
H
.
S
.
A
.
Mi
n
i
m
u
m
Au
t
h
o
r
i
z
e
d
Wo
r
k
e
r
Re
s
t
r
i
c
t
e
d
Zo
n
e
Mo
b
i
l
e

W
o
r
k

E
q
u
i
p
m
e
n
t
*
No
n
-
In
s
u
l
a
t
e
d
Bo
o
m
s
Ce
r
t
i
f
i
e
d
In
s
u
l
a
t
e
d
A.
D
.
O.
H
.
S
.
A
.
Pe
r
s
o
n
n
e
l

Z
o
n
e
s
*
LI
M
I
T
S

O
F

A
P
P
R
O
A
C
H
Ma
i
n
t
a
i
n

M
a
x
i
m
u
m

C
l
e
a
r
a
n
c
e
s

a
n
d

I
n
s
t
a
l
l

B
a
r
r
i
e
r
s

W
h
e
r
e

P
r
a
c
t
i
c
a
l
>0
.
9

m

(
3

f
t
)
>3
.
0

m
>4
.
5

m
>6
.
0

m
0.
9

m

t
o

0
.
3

m
(3

f
t

t
o

1

f
t
)
75
0

V
to

1
5

k
V
0.9

m

t
o

0
.
4
5

m
(3

f
t

t
o

1
.
5

f
t
)
>1
5

k
V
to

3
5

k
V
>1
.
2

m

(
4

f
t
)
1.
2

m

t
o

0
.
6

m
(4

f
t

t
o

2

f
t
)
>3
5

k
V
to

5
0

k
V
>1
.
5

m

(
5

f
t
)
1.
5

m

t
o

0
.
9

m
(5

f
t

t
o

3

f
t
)
>5
0

k
V
to

1
5
0

k
V
>2
.
1

m

(
7

f
t
)
2.1

m

t
o

1
.
2

m
(7

f
t

t
o

4

f
t
)
>1
5
0

k
V
to

2
5
0

k
V
>3
.
7

m

(
1
2

f
t
)
3.7

m

t
o

2
.
7
5

m
(1
2

f
t

t
o

9

f
t
)
>2
5
0

k
V
to

5
5
0

k
V
>3
.
0

m
>4
.
5

m
>6
.
0

m
>0
.
9

m
(3

f
t
)
>1
.
2

m
(4

f
t
)
>2
.
4

m
(8

f
t
)
>3
.
0

m
(1
0

f
t
)
>4
.
6

m
(1
5

f
t
)
>0
.
3

m
(1

f
t
)
>0
.
4
5

m
(1
.
5

f
t
)
>0
.
9

m
(3

f
t
)
>1
.
2

m
(4

f
t
)
>2
.
7
5

m
(9

f
t
)
© 2
0
0
9
WNIDCL_PR_019(H1) Attachment E 176 of 176