July 2009
Applicant Installed
Underground
Installation
www.iid.com
Revision 1.1
APPLICANT INSTALLED APPLICATION
IMPERIAL IRRIGATION DISTIRICT
I.
INTRODUCTION
OVERVIEW:
When Applicant selects non-District installation, the Distribution Line Extension
may be installed by Applicant’s qualified contractor or sub-contractor in
accordance with District’s design and specifications per Regulation 15.
See Regulation 15 Section G.
District Underground Standards Revision 5.1 2007 used for this manual,
however when a higher revision is published that revision will be used.
Refer to Appendix “A” Underground Line Construction Specifications SWP10005
Refer to Appendix “B” for other specifications for reference
II.
GENERAL:
These specifications cover the requirements for furnishing and installing
electrical underground distribution facilities.
PURPOSE:
This document is intended to support the District Underground Standards
book(s) by detailing several portions of construction for contractors.
SCOPE:
The information and specifications included in this booklet pertain to conductors
and equipment connecting the customer to the District’s electric system. These
standards and specifications are for the benefit of the District, customers,
architects, engineers, and electrical contractors.
Throughout this information, you may be directed to call the District inspector,
Customer Service Project Manager, Real Estate Section, Standards dept. or
other District personnel.
INSPECTION
District Representative/Inspector has the sole responsibility and authority over
the District contract concerning quality control, etc. during installation. Any work
failed/rejected by the District representative/inspector shall be corrected in a
manner satisfactory to the District representative/inspector prior to the
continuation of work. All inspection requirements will be adhered to as outlined
in the Job and District Developer Energy Planning Guide. District
representative/inspector has the right to be present prior to and during any
installation of job, including but not limited to all primary wire pulling, transformer
setting, and primary wire makeup.
2
06/23/2009
WARRANTY
This Agreement is entered into between Imperial Irrigation District (“District”), an
irrigation district formed pursuant to Division 11 of the California State Water
Code,
and
_____________________________________________
(“Applicant”).
Applicant plans on constructing an applicant-installed distribution line extension
pursuant to District Regulation 15, Distribution Line Extensions, at service
address
of
__________________________________
in
____________________, California, reference CSP Notification Number
___________. In consideration of District’s approval of the Applicant-installed
distribution line extension application, Applicant warrants that all work and/or
equipment furnished or installed by applicant, its contractor or subcontractor in
connection with the Distribution Line Extension shall be free of defect in
workmanship and material. The warranty period for materials shall run from the
date of final acceptance by District of the Distribution Line Extension and extend
for one (1) year. The warranty period for workmanship shall run from the date of
final acceptance by District of the Distribution Line Extension and extend for
three (3) years. Should the District identify any defect in workmanship or
materials during the warranty period, District, at its election, shall either (a)
repair or replace the defective work and/or equipment or (b) demand that
applicant repair or replace the defective work and/or equipment; and, in either
event, applicant shall be liable for all costs associated with such repair and/or
replacement. Upon demand by District, Applicant shall promptly correct any
breach of any warranty to District’s satisfaction and that of any jurisdictional
government agency.
Warranty District form IID_700F_609 attached to this document must be signed
and returned to the appropriate Customer Service Project Manager.
DIG ALERT
Use caution when digging. To avoid buried electrical cables, call U.S.A. Dig
Alert (Underground Service Alert) before digging at 800-422-4133.
MATERIAL
The District reserves the right to provide material to the installer when the
provision of the material is in the best interest of the District. When the material
is not provided by the District, the installer will follow all specifications when
purchasing material to be installed.
SPLICING
Primary and/or Secondary splicing is not acceptable in District conductors,
transformers, conduits or other structures.
3
6/25/09
Contact the inspector for any questions during installation or to schedule
inspections i.e. mandrelling, conduit inspections, etc.
ƒ
IID Inspectors
o La Quinta Office (760) 398-5828
o Imperial Office (760) 482-3300
Real Estate issues:
ƒ
Real Estate
o La Quinta Office (760) 391-5950
o Imperial Office (760) 339-9239
Imperial Irrigation District Standards issues:
ƒ
4
Standards
o Distributionstandard@iid.com
06/23/2009
General Customer Service Proposal (CSP)
Process from Start to Finish
Applicant Installed Installation
Business Partner Packet
Issued and Completed
by Business Partner
Business Partner Packet
Reviewed and Fielded
by Project Coordinator
PR
OP
OS
AL
✓
✓
Verify
Commercial/Residential
Application for
Permanent Service
Customer Service
Proposal (CSP) created
by CSP Representative
Customer Pays
Engineering Fee
$
Quote by
Project Manager
Engineering
Design
All Pertinent
Inspections
Completed
Construction
Scheduled
Customer Pays
Inspections
Performed by
IID
Applicant
Installation Option
IID Constructs
600 amp Backbone
if Applicable
IID Install
Service
Transfer of
Ownership
Applicant Install
Service
Jurisdictional
Authority Inspection/
IID Sets Meter
Inspections
Performed by
IID
IID-700F (06-09)
PRINT FORM
WARRANTY AGREEMENT FOR APPLICANT INSTALLED DISTRIBUTION LINE EXTENSION This Agreement is entered into between Imperial Irrigation District (“District”), an irrigation district formed pursuant to Division 11 of the California State Water Code, and _____________________________________________ (“Applicant”). Applicant plans on constructing an applicant‐installed distribution line extension pursuant to District Regulation 15, Distribution Line Extensions, at service address of __________________________________ in ____________________, California, reference CSP Notification Number ___________. In consideration of District’s approval of the Applicant‐
installed distribution line extension application, Applicant warrants that all work and/or equipment furnished or installed by applicant, its contractor or subcontractor in connection with the Distribution Line Extension shall be free of defect in workmanship and material. The warranty period for materials shall run from the date of final acceptance by District of the Distribution Line Extension and extend for one (1) year. The warranty period for workmanship shall run from the date of final acceptance by District of the Distribution Line Extension and extend for three (3) years. Should the District identify any defect in workmanship or materials during the warranty period, District, at its election, shall either (a) repair or replace the defective work and/or equipment or (b) demand that applicant repair or replace the defective work and/or equipment; and, in either event, applicant shall be liable for all costs associated with such repair and/or replacement. Upon demand by District, Applicant shall promptly correct any breach of any warranty to District’s satisfaction and that of any jurisdictional government agency. Signature Date Representing Print Name IID Energy Customer Service Operations
Imperial Valley 1699 W. Main Street, Suite A, El Centro, CA 92243 (760) 482‐3300 Fax (760) 482‐3301 La Quinta 81‐600 Avenue 58, La Quinta, CA 92253 (760) 398‐5841 Fax (760) 391‐5944 7
04/29/2009
8
04/29/2009
SECONDARY CONNECTIONS
SINGLE PHASE
Refer to Standard 141.4 – 141.7; 142.4 – 142.7; 143.5 – 143.7 when building
single phase transformers note the location of the secondary cable, entrance,
train cable behind primary cable do not allow cable to rest on primary or
transformer case. Note location of phases and neutral conductors (Refer to
Appendix “A” Underground Line Construction Specifications SWP10005,
attached for all secondary conductors tagging page 1 Section III. Underground
Secondary Identification Tags)
THREE PHASE
Refer to Standard 144.1 – 144.6; 146.1 – 146.6; 147.1 – 147.9; 149.1 – 149.9
when building three phase transformers note the location of the secondary cable
entrance is in a separate cabinet (secondary and primary cables are not allowed
in the same cabinet area) note the secondary connectors X0 = neutral, X1, X2,
and X3 = phases. (Refer to Appendix “A” Underground Line Construction
Specifications SWP10005 attached for all secondary conductors tagging page 1
Section III. Underground Secondary Identification Tags)
Ensure when pulling secondary cable to utilize the conduits located in the
rear of the cabinet this facilitates future wire pulling if necessary. (See
wire pulling section page 9 of this document for further instructions)
HI POT
High Potential electrical testing used to verify electrical insulation, shall be
performed by reputable Hi Pot (High Potential) qualified personnel acceptable to
the Imperial Irrigation District prior to acceptance.
GROUNDING
All grounding should be connected prior to primary or secondary connections
due to the location of ground wire in cabinets, transformers, vaults and other
equipment is located behind primary and secondary cables.
9
04/29/2009
SETTING EQUIPMENT
LOADING
Care is to be taken when loading transformers on vehicles. Contractor is to
ensure that load is properly stowed, tied down, blocked, etc. in accordance with
proper load handling procedures to ensure the safety of individuals and
equipment.
MOUNTING
Refer to Appendix “A” Underground Line Construction Specification SWP10005
page 2 section IX Installing & Securing Underground Equipment
SECURING
BREAKAWAY LOCK
The Imperial Irrigation District utilizes a break away type of locking device for all
single phase transformers and secondary boxes. See illustration below:
IID Material 40005817
All Imperial Irrigation District three phase transformers maybe locked with the
breakaway lock illustrated above as material number 40005817.
KEY LOCK
All Imperial Irrigation District Switches (including both overhead and
underground) and sector cabinets shall be locked with a keyed Lock IID material
40003778 short shank or 40003779 long shank, depending upon the
application.
10
04/29/2009
CONNECTORS PRIMARY
ELBOWS
1. 200 AMP (Load Break)
Two sizes of load break elbows are used 1/0 and 4/0 depending upon the size
of cable pulled into the job.
Follow manufacturer’s installation instructions when installing load break elbows
on 1/0 or 4/0 cable.
Refer to Appendix “A” Underground Line Construction Specification SWP10005
page 2 section VII Cable Sealing Kit Installation.
(Typical 200 amp load break elbow and cold shrink)
11
6/23/2009
QUICKTERMS
3. 1/0 (40004178); 4/0-350 (40004180); 750 (40004181)
Quick terms are used in situations when primary cable is transitioning to a riser
or switch connection; the connection area is not accessible to unauthorized
individuals etc.
Follow manufacturer’s installation instructions when installing quick terms.
Refer to Appendix “A” Underground Line Construction Specifications SWP10005
attached for all tagging of conductors.
LIGHTNING ARRESTERS ELBOWS
All underground lightning arresters are 10Kv
Follow manufacturers instructions when installing all lightning arrester elbows
ensure that ground lead is properly connected and grounded.
12
04/29/2009
13
04/29/2009
14
04/29/2009
CABLE LUBRICATION:
Authorized cable lubrication is used during pulls:
• Reducing the coefficient of friction is the primary factor in the selection of a lubricant
• Compatibility of the lubricant with cable and conduit is extremely important. The
lubricant should not have any deleterious effects on the conduit or on the physical
or electrical properties of the cable insulation, semiconducting, or jacket materials.
• The lubricant and its residue should not propagate flame.
• The lubricant should be UL or CSA listed.
• The lubricant should contain no waxes or greases.
The Imperial Irrigation District has approved the following lubricants used when pulling
cable.
American Polywater PJ 320, PJ 640
Rainbow Catalog # 8283
The cable jacket and/or conduit walls should be completely lubricated. The lubricant
should be applied immediately before, and/or, during the pull. This quantity should be
increased as needed for difficult pulling situations.
An estimate of the quantity of required lubricant can be determined from.²
Q = (0.0015) • L • D
Where: Q = Quantity, in gallons
L = conduit length, in feet
D = outside diameter of cable or inside diameter of conduit, in inches
Calculations should be made to indicate whether the pull looks “easy” or “impossible,”
making the decision to pull an obvious choice. When a “marginal” situation is
encountered, the entire pull should be reviewed. This review may include more rigorous
calculations or trial pulls. A final decision should be made based on installation factors
known to the end user and installer.
The sizes of the conduit are determined based on the calculations of the
clearances, jamming, and fill. Pulling tensions may then be evaluated by determining the
maximum tension based on the pulling device used and the maximum tension that can be
applied to the conductors. The lesser of these two values is the maximum allowable
tension (Τm).
The pulling tension (T) required to pull the cable through the conduit is then
calculated and compared to the maximum allowable tension. If the pulling tension
exceeds the allowable tension, then conditions should be changed to ensure a successful
pull. After calculating pulling tensions, sidewall pressures (SP) may be calculated.
For further study on this subject, AEIC Publication G5-90 and IEEE Standard 1185
present additional details.³
² Polywater, “Technical Talk,” volume 4.
³ AEIC Publication no G5-90, “Underground Extruded Power Cable Pulling, AEIC Task
Group 28,” 2nd edition, May 2001; and IEEE 1185-1994, “Guide for Installation for
Generating Station Cables.”
15
04/29/2009
16
04/29/2009
17
04/29/2009
18
04/29/2009
19
04/29/2009
PRIMARY CABLE PHASING
When pulling three phase primary cable it is imperative to correctly phase the cable prior
to pulling, and ensuring the cut end is phased identically. Due to some long runs phasing
should take place prior to pulling cable. Refer to the Underground Line Construction
Specification SWP10005 attached page 2 Section V Primary Phase and I.D. Tags
20
04/29/2009
CABLE (600 VOLT)
The Imperial Irrigation District utilizes Southwire for all our secondary conductors
Use care when pulling secondary wire to prevent sharp edges, rough spots, etc. to
eliminate the possibility of removing the outer jacket, removal of outer jacket will cause
premature failure of the cable.
Refer to Appendix “A” Underground Line Construction Specification SWP10005 attached
for proper identification of cable including proper phasing when installing.
SWITCHES
The Imperial Irrigation District utilizes two Underground Switch Manufacturers, Federal
Pacific and S&C. The switch types are as follows:
Federal Pacific PSI (Live Front)
S&C PMH (Live Front)
Sizes:
PSI/PMH 5
PSI/PMH 9
PSI/PMH 10
PSI/PMH 11
PSI/PMH 12
Refer to Distribution Construction Standards Underground Book Revision 5.1 2007
standards 119 – 125.2 for switch detail.
22
04/29/2009
23
04/29/2009
24
06/30/2009
Appendix A
Underground Line Construction Specifications SWP10005
SWP10005 (a) Overview
Purpose & Scope
The purpose of this Standard Work Practice is to maintain consistent Underground
construction specifications for IID Energy Line Crew personnel and contractors. This SWP
Overview is to include information and guidelines concerning different aspects of
Underground Line Construction.
I. Approved Equipment Labels
a. “WARNING” labels (Fig.1) shall be affixed to underground equipment as
follows:
o UG Sectors & Single Phase Pad-Mount Transformers:
• Outside front lid surface and centered (Fig. 2)
o UG Three Phase Pad-Mount Transformers:
• Left door outside surface and centered (Fig. 3)
o UG Switching Cabinets:
• Outside surface, both sides on left cabinet doors. (Fig. 4)
b. “DANGER” labels (Fig. 5) shall be affixed to underground equipment as
follows:
o UG Sectors & Single Phase Pad-Mount transformers
• Inside surface of UG Equipment door & centered. (Fig. 6)
o UG switching cabinets & Three Phase Pad-Mount Transformers
• Inside surface of all equipment doors & centered. (Fig. 7)
II. Identifying Underground Secondary Conductors (for installation)
a. One wrap of 3M vinyl colored tape on each Three Phase conductor as
specified for the following voltages:
o 208Y/120– White (N), Black, Red & Blue, left to right (Fig. 8).
o 480Y/277– White (N), Brown Orange & Yellow, left to right (Fig. 9)
o 240D/120--White (N), L1=Black, L2=Blue, High Leg =Orange (Fig.23)
III. Underground Secondary Identification Tags
a. For Pad-Mount Transformers:
o Secondary Identification Tags (Fig. 10) shall be affixed to grounded
(neutral) conductor of corresponding secondary service cable. (Fig. 11)
b. For Secondary Pull Boxes (Carson Box):
o Secondary Identification Tags (Fig. 10) shall be affixed to grounded
(neutral) conductor of corresponding secondary service cable. (Fig. 12)
c. All Secondary ID tags shall be completed with No. 2 pencil.
IV. Underground Secondary Cable Terminations
a. Pad-Mount Transformers:
o Service wire shall not be bent sharply at top of conduit level (Fig. 13)
o Service wire landing on the secondary connection lugs shall be in a
horizontal manner. (Fig. 11), (Fig. 13)
1
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
V. Primary Phase and I.D. Tags
a. Primary cable “phase” and “I.D” tags shall be installed as follows: (IID
Underground Distribution Standard No. 868)
o Primary cable “phase” tags (Fig. 14) shall be installed vertically with
small cable tie and the top edge of the phase tag is to match the top edge
of “cable sealing kit” (cold shrink). (Fig. 15), (Fig.18)
o Primary cable “Identification Tags” (Fig. 16) in UG sectors,
transformers and vaults shall be affixed vertically w/small cable tie to
bottom slot on phase tag. (Fig. 14), (Fig. 17).
o Primary cable “Identification Tags” (Fig. 18a) in UG switch gear shall
be attached to door “hold bars” in bays where conductors are terminated.
VI. Identifying Primary Conductors (for installation)
a. One strip of red in color 3M electrical vinyl tape for “A” phase (Fig. 17),
b. Two strips of yellow in color 3M electrical vinyl tape for “B” phase (Fig. 17)
and
c. Three strips of Blue in color 3M electrical vinyl tape for “C” phase (Fig. 17).
VII. Cable Sealing Kit Installation
a. The cable sealing kit (cold shrink) shall be installed as specified on Elbow
Connector or 3M kit instructions (over Elbow Connector). (Fig.18).
VIII. Underground Primary Cable Testing and Identification
a. All primary underground cable shall be tested after installation and prior to
being energized for service;
o All primary underground cable shall be Hi- Potted before energizing it
for service.
o The “Avistar” Phase Identification tester shall be used to verify phasing
on all Primary cable new installations.
IX. Installing & Securing Underground Equipment
a. All lifting brackets shall be removed from Underground equipment after
installation.
b. All underground Transformers and Sectionalizing Cabinets (sectors) on
concrete pads shall be properly secured by means of galvanized brackets and
“HILTI” anchor bolts supplied by job material list and/or Material
Coordinators’ office. (Fig. 19)
c. Sectionalizing Cabinets on Fiberglass “sleeves” shall be secured by means
of 1½”x ½” -silicone bronze- hex bolts. (Fig 20)
X. Temporary Underground Primary Feed Identification
a. Any temporary Primary electrical feed to underground equipment that does
not correspond to the final job drawing specifications shall be tagged with a
“WARNING DO NOT OPERATE” tag (Fig. 21) with the following
written requirements:
o The tag shall indicate the “Temporary Condition” of the primary feed.
o The tag shall clearly describe the direction and the source of the Primary
feed.
o The tag shall be signed and dated by the person responsible.
2
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
XI. Tracking and Eliminating Abnormal Condition Temporary Underground
Primary Feeds
o “Abnormal Conditions” are recorded in the “As Builts” and the
Power Outage Coordinator keeps a record and tracks the status and
coordinates with engineering so these conditions can be put back to
normal
o Complete process to be determined
XII. Primary Reverse Feed UG Risers
a. When feeding Overhead Primary lines from an Underground System, a
“REVERSE FEED” label shall be affixed to the UG riser conduit at the
transition pole. (Fig. 22)
o Responsibilities:
• It is the responsibility of the G.O. 128 compliance inspector to
identify and label all existing and unmarked “Reverse Feed”
locations A.S.A.P.
• It shall be the responsibility of the person in charge of establishing a
“Reverse Feed” Underground riser to acquire and affix the
corresponding label.
• It shall be the responsibility of the person in charge of changing the
feed direction of a Reverse Feed Underground riser to remove the
label.
• Only materials approved by the Energy Safety Compliance office
shall be used as labels for “Reverse Feed” URD risers. (1 ¾ X 3”
Reflective letters).
o Records
• A written record of all “Reverse Feed” locations shall be attached to
this overview as a reference to the Line Crew Foremen.
• All changes and additions to the Reverse Feed records shall be
forwarded to the Safety Compliance Office to update the IID
Website information and to provide updated copies of the records to
the Line Crew Foremen.
Figure 1
3
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Back to Top of Page
Figure 2
Back to Top of Page
Figure 3
4
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Back to Top of Page
Figure 4
Back to Top of Page
Figure 5
5
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Back to Top of Page
Figure 6
Back to Top of Page
Figure 7
6
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Back to Top of Page
Figure 8
Back to Top of Page
7
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Figure 9
Back to Top of Page
Figure 10
Back to Top of Page
Figure 11
8
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Back to Top of Page
Figure 12
Back to Top of Page
Figure 13
9
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Back to Top of Page
Figure 14
Back to Top of Page
10
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Figure 15
Back to Top of Page
Figure 16
Back to Top of Page
11
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Figure 17
Back to Top of Page
Figure 18
Back to Top of Page
12
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Figure 18a
Back to Top of Page
Figure 19
Back to Top of Page
13
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Figure 20
Back to Top of Page
Figure 21
Back to Top of Page
Figure 22
14
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Back to Top of Page
Figure 23
15
06/19/06
Appendix A
Underground Line Construction Specifications SWP10005
Back to Top of page
16
06/19/06
Appendix “B”
Reference and Industry Standards Publications
Polywater, “Technical Talk,” volume 4
Southwire “Power Cable Installation Guide,” 2005
General Cable “Installation Manual for Power and Control Cables” 8th Edition; October
2007
AEIC Publication no G5-90, “Underground Extruded Power Cable Pulling, AEIC Task
Group 28,” 2nd edition, May 2001; and IEEE Standard 1185-1994, “Guide for installation
Methods for Generating Station Cables.”
Distribution Construction Standards “Underground” Revision 5.1; 2007, Imperial Irrigation
District
Underground Line Construction Specifications SWP10005; 6/19/2006; Imperial Irrigation
District
Developers Energy Planning Guide, Imperial Irrigation District
Applicable IEEE standards
Applicable ANSI standards
The Lineman and Cableman’s Handbook; Thomas M. Shoemaker/James E. Mack,
McGraw -Hill
National Electrical Safety Code (NESC) Handbook; David J. Marne, P.E., McGraw-Hill
G.O. 128 (General Order 128)
When referring to Imperial Irrigation District Standards including Developers Energy
Planning Guide the most recent revision supersedes all previous revisions, prior to
engaging in construction ensure that newest revision is utilized. Revisions will be made
with out prior notification.
4/29/2009