20191101PAC to Staff 1-9.pdf

ROCKY MOUNTAIN
POIA'ER
A OMSIO|! OF PACifEOAP
RECEIVED
l0l9 tl0Y - I Pll 5: 06 1407 W North Temple, Suite 330
Salt Lake City, Utah 84116
Novonber l, 2019
Diane Hanian
Idaho Public Utilities Commission
472 W. Washington
Boise, ID 83702-5918
diane.holt(dpuc.idaho. sov (c)
RE
Please find enclosed Rocky Mountain Power's Responses to IPUC lst Set Data Requests l-9.
Provided via encryption is Confidential Attachment IPUC 7.
If you have any questions, please feel free to call me at [phone].
Sincerely,
___-!s/-
J. Ted Weston
Manager, Regulation
Enclosures
rssloN
ID PAC.E-I9-I2
IPUC I "t Set Data Request (l -9)
IPUC Data Request I
Which classes of service are expected to benefit from the new option? Will the
cost ofthe option be recovered only from those who receive it, or will costs be
shared by a larger group of customers or class of customers? How will the cost of
this option be allocated to customers in future cost allocation studies? Please
provide justification, as applicable.
Response to IPUC Data Request I
The Company does not have an expectation that any customer class will benefit
more liom the inclusion of the 240148O single phase voltage category. The cost
ofproviding service at the new single phase 2401480 volt category is
approximately the same as the existing single phase 1201240 volt for the same
kVA rating. Customers requesting the 2401480 volt service will not see a cost
difference under the Company's line extension policy. Currently the Company
does not anticipate making changes to future cost allocation studies as the result
of the proposed change.
Recordholder:
Sponsor:
Robert Meredith
Ted Weston
PAC-E-19-12 / Rocky Mountain Power
November I, 2019
IPUC 1't Set Data Request I
PAC-E-19-12 / Rocky Mountain Power
November 1, 2019
IPUC 1"t Set Data Request 2
IPUC Data Request 2
Is the Company planning to propose a separate charge to customers requesting a
single-phase, 240/480 volts, 3-wire, grounded secondary service? Please explain.
Response to IPUC Data Request 2
The charge will be the estimated cost ofthejob, less the applicant's line extension
allowance, which is the same for single-phase, 12O/240 volt, 3 wire, grounded
secondary service, or any other general service.
Recordholder:
Sponsor:
Rob Stewart
Ted Weston
PAC-E-19-12 / Rocky Mountain Power
November I , 2019
IPUC l't Set Data Request 3
IPUC Data Request 3
Would the change also be implemented through the line extension policy? If so,
please describe the specific changes that will need to occur in the Company's line
extension policy and tariff.
Response to IPUC Data Request 3
Recordholder:
Sponsor:
Rob Stewart
Ted Weston
No change is needed to the line extension tariff because it currently encompasses
this service. The allowance is the same multiple of revenue allowance as
currently exists.
PAC-E-19-12 / Rocky Mountain Power
November 1, 2019
IPUC 1't Set Data Request 4
IPUC Data Request 4
Please identifo and provide the plant and expense accounts (in the uniform systern
of accounts) that are affected by the proposed option for customers to receive
single-phase, 240/480 volts, 3-wire, grounded secondary service.
Response to IPUC Data Request 4
FERC accounts 583, 584, 593,594,595,596,365,367 and 368 could potentially
be affected by the proposed option.
Recordholder:
Sponsor:
Robert Meredith
Ted Weston
PAC-E-19-12 / Rocky Mountain Power
November l, 201 9
IPUC I s( Set Data Request 5
IPUC Data Request 5
Please provide the expected cost for a typical installation ofa single-phase,
2401480 volt,3-wire, grounded secondary service. Please breakdown the costs to
directly reflect the transformer, other installation material, and labor costs.
Response to IPUC Data Request 5
The cost of installing a single phase - 2401480 volt - 50 kVA transformer, service
and meter is approximately:
FERC Description
Account of FERC account364 Pole, Towers, Fixtures365 Overhead Conductors & Devices368 Line Transformers - Blanket369.1 Services - Overhead370 Meters
TOTALS
Labor
$ 320
$ 269
$ 538$s9
$72
s 1258
Material
$ 123s 191
$ 1,417$4s
$ 2s0
s2026
Total
$ 443
$ 460
$ 1955
$ 104
$ 322
$3284
Recordholder:
Sponsor:
Rob Stewart
Ted Weston
PAC-E-I9- 12 / Rocky Mountain Power
Novernber 1,2019
IPUC 1"t Set Data Request 6
IPUC Data Request 6
Please provide the difference in cost ofa single-phase, 2401480 volts, 3-wire,
grounded transformer compared to a single-phase, 1201240 volts, 3-wire,
grounded transformer on a per MVA basis,
Response to IPUC Data Request 6
Based on the example of a 50 kVA transformer shown in data response IPUC 5,
the cost ofa 2401480 transformer is $ 1417, and the cost of a 120/240 volt
transformer is $1256, all other costs are the same.
This should not be extrapolated to MVA for a couple ofreasons. One, we do not
serve 1000 kW loads single-phase. Two, the Company prices material based on a
moving average price, thus this price difference will vary based on the point in
time ofthe job design and the cost of inventory at that point in time. Because,
other than the secondary windings, the material, enclosure size, configuration,
etc., is the same in the transformers for both voltages, the costs will remain close
regardless of the kVA rating.
Recordholder:
Sponsor:
Rob Stewart
Ted Weston
PAC-E-19-12 / Rocky Mountain Power
November 1,2019
IPUC I't Set Data Request 7
Please provide current inventory levels of the following, with a unit cost for each
type:
a. Single-phase, 120/240 volts,3-wire, grounded transformer; and
b. Single-phase, 240/ 480 volts, 3-wire, grounded transformer.
Response to IPUC Data Request 7
Please refer to Confidential Attachment IPUC 7, which includes inventory levels
and pricing by location as ofOctober 18, 2019. Also included are notes for orders
that are in process.
Recordholder:
Sponsor:
Jr Chapman
Te.d Weston
IPUC Data Request 7
PAC-E-I9- 12 / Rocky Mountain Power
November 1,2019
IPUC ls1 Set Data Request 8
IPUC Data Request I
How many single-phase, 2401480 volts,3-wire, grounded transformers are
expected to be added in inventory?
Response to IPUC Data Request 8
Please refer to the Company's response to IPUC Data Request 9.
Recordholder: Dan Bodily
Sponsor: Ted Weston
PAC-E- I 9- 12 / Rocky Mountain Power
Novernber l, 2019
IPUC l't Set Data Request 9
IPUC Data Request 9
Response to IPUC Data Request 9
While there have not been many requests for this application in the past, there has
been some interest. There are about l0 customers that have heard about the
possibility of this option and are awaiting the possible tariffchange. The
Company does not expect to see many ofthese requests, possibly l0 per year in
the Idaho service territory.
Recordholder:
Sponsor:
Dan Bodily
Ted Weston
How many new services in Idaho are expected to take advantage of the single-
phase, 2401480 volts, 3-wire, grounded secondary supply?