Scope Clarification · 1/2/2018 · UG-1: Conduits Greenbook. Underground Conduits 062288. Page 2 of 22. Rev. #14: 07-01-14 Material Specifications 10. Plastic conduits and fittings

BRESD ALTERATIONS & ADDITIONS TO CLASSROOM & ADMINISTRATION BUILDING INCREMENT 3 MOLD REHABILITATION PROJECT

BID PACKAGE BR2018.1.2.3.14 MSB Installation

Scope Clarification General Notes:

1. The following scope is offered as assistance to complete a thorough scope letter. Bids and budget breakout shall include a scope letter prepared by the contractor.

2. This work will be completed per plan and spec. RFI’s should be submitted if the plans are not thorough or lack dimensions. Review all pages of the plans.

3. Budget breakout is required for all scopes. 4. CRM Group Inc. needs to know the number of days required to complete of work contained in this

scope to assist with scheduling. 5. Contractors are to notify CRM Group of any long lead items or material supply issues that could

affect schedule. General Description of Scope of Work:

1. Contractor shall install 1 – 800 amp MSB a. District owned – this will be onsite for install when contractor is ready

2. Contractor shall provide and place all electrical conduits and/or stub-outs per attached plan and PGE Greenbook (also attached). This shall include: a. Stubs and grounding for MSB b. Stubs and grounding for Transformer c. Miscellaneous stubs as shown d. Conduit from transformer vault to (e) Utility Pole

3. Contractor shall provide and place concrete pad per attached: This shall include: a. Raised concrete pads for Transformer and MSB per plan and PGE Greenbook

4. Contractor shall provide and place safety bollards per attached markup a. Removable bollards shall be provided and placed as shown on attached b. Permanent bollards shall be provided and placed as shown on attached

Note: Contractor shall review the DSA Approved Plans, Addenda and Project Manual (Contract Documents) for general reference of work for all trades. All work on the approved Contract Documents pertaining to this Bid Package, not found in this Scope Clarification Document, shall remain the responsibility of the Contractor. This document shall be used only as a clarification of the intent of the DSA Approved Plans and Project Manual. While this document is not meant to add to the design of the project, it is formal, and the contractor shall be responsible for its content.

7' - 6"4' - 0"

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3' -

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2' - 0" 6' - 0"

2' - 0"

3' -

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3' -

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MINIMUM PER UTILITY

10' - 0"

8' -

10

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PACEENGINEERINGREDDING, CALIFORNIA

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BR - ELECTRICAL SERVICE DIMENSIONS

BURNT RANCH ELEMENTARY SCHOOL

ALTERATIONS & ADDITION TO

MULTI-PURPOSE BUILDING/ CLASSROOM

- INCREMENT 2

E1

17142

E1 3/16" = 1'-0"

1BR - ELECTRICAL SERVICE DIMENSIONS

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(N)MSB

(N)PRIMARY CONDUITPER UTILITY

(N)SECONDARY CONDUITPER UTILITY

(N)(4)1"C-EMPTY(N)4"C-EMPTY

(N)(5)4"C-EMPTY(N)(2)1"C-EMPTY

SEE SHEET E0.2-I2FOR CONTINUATION

(N)(3)2 1/2"C-EMPTY(N)(2)3"C-EMPTY

(E)UTILITY POLE

(E)PRIMARY OVERHEADUTILITY LINES (FIELD LOCATE)

(N)RISER CONDUITPER UTILITY

(N)UTILITY TRANSFORMER & TRANSFORMER

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BOLLARDS PER UTILITY

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BR - ELECTRICAL SERVICE LAYOUT

BURNT RANCH ELEMENTARY SCHOOL

ALTERATIONS & ADDITION TO

MULTI-PURPOSE BUILDING/ CLASSROOM

- INCREMENT 2

E2

17142

E2 3/16" = 1'-0"

1BR - ELECTRICAL SERVICE LAYOUT

JOINT TRENCH CONFIGURATIONS& OCCUPANCY GUIDE

PACIFIC GAS AND ELECTRIC COMPANY

09−27−06

S5453, Exhibit B

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Page 1 of 4

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09−27−06

S5453, Exhibit B

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P

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09−27−06

S5453, Exhibit B

General Notes

Page 3 of 4



09−27−06

S5453, Exhibit B

General Notes, continued

Page 4 of 4

UG-1: ConduitsGreenbook

Rev. #14: 07-01-14 062288 Page 1 of 22

Electric Distribution

062288

Function:Asset Type:

Issued by: Date: 07-01-14

Rev. #14: This document replaces PG&E Document 062288, Rev. #13 For a description of the changes, see Page 22.

UNDERGROUND CONDUITS

Prepared by: ABB1

Design and Construction

Lisseth Villareal (LDV2)

Purpose and Scope

This document covers steel and plastic conduit for underground installations, with or without concrete encasement.

General Information

1. Applications for underground conduit are as follows:

A. Residential: All residential installations requiring conduit should be made without concrete encasement.

B. Light Commercial, Industrial, and Underground Residential Distribution (URD) Feeder: Installation of circuits ofthis type, which are three-way or less, should normally be made without concrete encasement. In denselypopulated urban areas, conduit banks involving more than three primary conduits will normally requireconcrete encasement.

C. Severe exposure to “dig-ins” and other hazards may require concrete encasement of conduit lines.

2. When conduit, including service conduit, is to be installed for PG&E by others, the following are acceptablealternatives to the American Society of Testing and Materials (ASTM) F512 (DB120) conduits listed in thisdocument:

A. PVC Schedule 40 or 80 UL 651 conduit that is so marked.

B. Hot-dip galvanized rigid steel conduit conforming to American National Standards Institute (ANSI)Specification C80.1.

It is the installer’s responsibility to use the proper fitting to join conduits. This transition may involve changes inboth conduit type and size. If equal diameter conduits of different wall thicknesses are joined, the inside edgeof the spigot end must be chamfered.

3. The current carrying capacity of an insulated cable is reduced if it is surrounded by other loaded cables. Forthis reason, conduit banks should be arranged so that each conduit is in an outside position.

4. Every effort should be made to obtain a straight, watertight conduit line.

5. In commercial distribution systems, consideration should be given to providing one or more spare conduits inthe original construction for future load growth requirements. The addition of such conduits at a later time ismuch more costly.

6. A mandrel shall be used to prove that all conduits are free and clear of dirt, rocks, and other debris.

7. A pulling tape with sequential footage markings (code 560154) shall be installed in all conduits and attached toan end cap. The tape shall be proven free and not glued or caught on joints.

8. All conduits shall be capped. All conduits not terminating in a subsurface enclosure, pedestal, or vault are tobe capped with unglued rigid caps (see Table 12 on Page 7). Conduits terminating in a subsurface enclosure,pedestal, or vault shall be capped with temporary plugs (see Table 12 on Page 7).

9. When the intrusion of water into buildings can be reasonably expected through lateral service ducts, PG&E isresponsible for sealing both ends of the conduit (refer to Document 063927 and Document 063928). TheRayflate Duct Sealing System (RDSS) conduit sealing system can be ordered for this purpose with approvalfrom electric standards personnel.

http://www.astm.org/cgi-bin/SoftCart.exe/DATABASE.CART/REDLINE_PAGES/F512.htm?L+mystore+ybpg8246#REFDOCShttp://wwwedm3/cgi-bin/getdoctdm.asp?itemid=981900047http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=981900041

UG-1: ConduitsGreenbook Underground Conduits

Rev. #14: 07-01-14062288 Page 2 of 22

Material Specifications

10. Plastic conduits and fittings shall comply with the latest revision of ASTM Standard F512 for PVC. In addition,the conduit shall also meet the following specific requirements:

A. Conduit cell classification of 12164-B or 12264-B, tensile modulus of 500,000 psi.

B. Fittings cell classification of 12234-B.

C. Marking shall conform to ASTM Standard F512 requirements.

D. The inside edge of conduit ends (spigot-end only in the case of belled-end conduit) shall be beveled toeliminate sharp edges and minimize the possibility of cable damage.

E. PVC conduit and fittings will be gray in color.

Application

11. Plastic conduit may be cut with a hacksaw or a fine-toothed wood saw. Clean off burrs. Bevel the inside toeliminate sharp edges.

12. Apply a thin, uniform coat of cement to both surfaces to be glued. Avoid excessive use of cement to prevent theformation of a bead of cement on the interior shoulder of the joint since, when hardened, the bead can causecable damage during installation. Immediately after applying the coat of cement to the conduit, insert the conduitinto the fitting socket until it bottoms at the fitting shoulder. Turn the conduit 1/4 turn during insertion to distributethe cement evenly. Hold the conduit in place for about 1 minute to prevent backing out in case of tight interferencefit joints. Wipe any excess cement away from the outside of the joint. Weather conditions may vary the curingtime. When using cement in confined areas, adequate ventilation must be provided.

Table 1 Cement for Use With Plastic Conduits

Application Quantity Code Manufacturer Part Number

PVC to PVC1 Quart 490157 Oatey 30886

1 Pint 490151 Oatey 30885

13. Backfill containing large rock, paving material, cinders, large amounts of sharply angular substance, orcorrosive material shall not be placed in excavations where such material may damage conduits, preventadequate compaction of the fill, or contribute to corrosion of the conduits.

14. End bells are to be used to terminate all conduits, unless the conduit has been terminated in an enclosureequipped with duct terminators. Cable protectors are to be used on reconstruction projects only, when endbells cannot be installed.

15. In applications where a conduit dead-ends, cap the end of the conduit and place a marker ball (material code 374947) at the location.

16. Conduits shown in Table 10 (HDPE) and Table 11 (Bore-Gard) on Page 6 are for directional boringapplications only.

17. Caution: When pulling conduits in boring applications, be certain to cut the conduits allowing sufficient extra lengthfor the conduit to relax. It may take as long as 72 hours for an excessively stretched conduit to fully relax.

18. Caution: Snap-N-Stac Combo Spacers should be used in concrete encased application.

19. Conduit shown on Table 19 through Table 27 (flexible conduit) on Page 10 through Page 16 are for use inareas with minor soil settlement issues, and for large radius sweeps or re-routes.

http://www.astm.org/cgi-bin/SoftCart.exe/DATABASE.CART/REDLINE_PAGES/F512.htm?L+mystore+ybpg8246#REFDOCShttp://www.astm.org/cgi-bin/SoftCart.exe/DATABASE.CART/REDLINE_PAGES/F512.htm?L+mystore+ybpg8246#REFDOCS

UG-1: ConduitsGreenbookUnderground Conduits

Rev. #14: 07-01-14 062288 Page 3 of 22

References Location Document

Underground Duct Lines Concrete Encased FRO: UG Conduit 031792A. . . . . . . . . . . . . . . . . . . . . . . . . . . .Underground Conduit Without Concrete Encasement FRO: UG Conduit 031793A. . . . . . . . . . . . . . . . . . . .Methods and Requirements for Installing Residential Underground Electric Services 0−600 V to Customer-Owned Facilities UG-1: Services/Greenbook 063927. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Methods and Requirements for Installing Commercial Underground Electric Services 0-600 Volts to Customer-Owned Facilities UG-1: Services/Greenbook 063928. . . . . . . . . . . . . . . . . . . .Engineering Material Specification 64, “Polyvinyl Chloride (PVC), Conduits, and Fittings” TIL EMS64. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Engineering Material Specification 99, “Underground Electric Duct System (installed by applicant)” TIL EMS99. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Engineering Material Specification 4123, “Backfill Sand” TIL EMS4123. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003709839http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003709839http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003709839http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003709840http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003709840http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003709840http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=981900047http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=981900047http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=981900047http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=981900047http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=981900047http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=981900041&Page=1http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=981900041&Page=1http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=981900041&Page=1http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=981900041&Page=1http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=981900041&Page=1http://wwwedm3/cgi-bin/getdocTDM.asp?itemid=003769658http://wwwedm3/cgi-bin/getdocTDM.asp?itemid=003769658http://wwwedm3/cgi-bin/getdocTDM.asp?itemid=003769658http://wwwedm3/cgi-bin/getdocTDM.asp?itemid=003769658http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003770107http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003770107http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003770107http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003770107http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003673809http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003673809http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003673809http://wwwedm3/cgi-bin/getdoctdm.asp?itemid=003673809

OD

Length = 10’ 0”

StandardCoupling

T

Figure 1Steel Conduit

ID

Figure 2 Steel Coupling

L

P

7/16” Dia.Holes

Figure 3 Split Coupling

Figure 4Conduit Sweep

Threaded Both Ends

90°R


Rev. #14: 07-01-14062288 Page 4 of 22

Rigid Steel Conduit and Fittings

Table 2 Codes for Rigid Steel Conduit

Conduit Size(inches)

Dimensions (inches) Weight(lbs.)1 CodeOD ID T

2 2.4 2.06 0.154 33 362103

3 3.5 3.06 0.216 69 362092

4 4.5 4.02 0.237 98 362093

5 5.6 5.04 0.258 134 362104

6 6.6 6.06 0.280 177 3621411 Weight for one 10-foot length, including one standard

coupling furnished with each length.

Table 3 Codes for Standard Steel Coupling


Dimensions (inches)Code

P L

2 2.73 2.18 362105

3 4.00 3.25 362094

4 5.00 3.50 362095

5 6.29 3.75 362106

6 7.39 4.00 362142

Table 4 Codes for Galvanized Steel Split Coupling

Conduit Size(inches) Code

2 362019

3 362021

4 362023

5 362107

6 362143

Table 5 Codes for 90° Steel Conduit Sweeps, TBEConduit Size

(inches)Radius(inches) Code

2 24 360081

3 36 362091

436 362090

60 360812

5 36 362109

6

36 362144

48 362145

60 360813

Figure 5Standard Coupling

Figure 6 Plastic-to-Steel Adapter

Figure 7 Swedge Reducer

7”

2-1/4”2-1/4”2-1/2”

C D

BA


Rev. #14: 07-01-14 062288 Page 5 of 22

Plastic Conduit and FittingsNotes

1. The depth of all couplings, adapters, swedge reducers, and bell ends shall conform to the requirements listedin Table 2 of ASTM Standard F−512.

Table 6 Data and Codes for Rigid Plastic Conduit DB120 1

ConduitSize

(inches)

Dimensions (inches)CodeOutside

DiameterMinimum

IDWall Thickness

Minimum Maximum2 2.375 2.161 0.077 0.107 0164683 3.500 3.204 0.118 0.148 0164714 4.500 4.132 0.154 0.184 0164725 5.563 5.121 0.191 0.221 0164736 6.625 6.111 0.227 0.257 016474

1 See Note 10 on Page 2 for material specifications.

Table 7 Codes for Standard Couplings 1

Standard CouplingConduit Size

(inches) CodeMinimum

Socket Depth2 360321 1.753 360322 2.8754 360323 3.3755 360401 4.06 360482 5.0

1 Standard couplings made from DB-60 conduitare acceptable.

Table 8 Codes for Plastic-to-Steel AdaptersConduit Size

(inches) Code

2 3603243 3603254 3603265 3604026 360489

Table 9 Data and Codes for Swedge Reducers

ReducerSize

(inches)

Dimensions (inches)CodeOD Min. Wall Thickness

A B 1 C D3 x 2 3.500 2.375 0.60 0.60 0185854 x 3 4.500 3.500 0.60 0.60 0185844 x 2 4.500 2.375 0.60 0.60 0185865 x 4 5.563 4.742 0.60 0.60 3607776 x 5 6.625 5.563 0.60 0.60 3607786 x 4 6.625 4.812 0.60 0.60 016476

1 Dimensions shown are for a swedge reducer with a spigotend. A belled end may be substituted.

http://www.astm.org/cgi-bin/SoftCart.exe/DATABASE.CART/REDLINE_PAGES/F512.htm?L+mystore+ybpg8246#REFDOCS

Figure 8 HDPE Coupling


Rev. #14: 07-01-14062288 Page 6 of 22

Plastic Conduit and Fittings (continued)

Table 10 High Density Polyethlene (HDPE) Conduit Directional Boring Conduit 1

Conduit Mechanical Couplings 2, 3

Size Length(feet)

Description Code Size(inches)

Code

2” Sch 80 500 Coil 4 3605112 360690

2” Sch 80 40 Stick 360017

3” Sch 80 500 Coil 4 3606443 360691

3” Sch 80 40 Stick 360018

4” Sch 80 625 Coil 4 360687

4 3606924” Sch 80 625 Coil 5 360014

4” Sch 80 40 Stick 360015

5” SDR 13.5 450 Coil 4 360688

5 3606945” SDR 13.5 450 Coil 5 360012

5” SDR 13.5 40 Stick 360013

6” SDR 13.5 450 Coil 4 360689

6 3606956” SDR 13.5 450 Coil 5 360010

6” SDR 13.5 40 Stick 3600111 Color shall be black with at least 3 red longitudinal strips.2 May be used to connect PE conduit to PVC conduit (except in directional drilling apps.)3 Mechanical couplings are not designed for directional drilling. Fusion joints are required.4 No reel.5 With reel.

Table 11 PVC (Bore-Gard) Directional Boring Conduit

Size(inches) Description Code

3 Conduit 10’, Schedule 40 360055


3 Replacement Locking Straps 1 360058

3 Replacement Seal Gaskets 1 360057




4 Replacement Seal Gaskets 1 360029




6 Replacement Seal Gaskets 1 3600301 Package of 10.

Hole for AttachingPulling Line

Rigid Cap Cap Plug

Figure 9Plastic Conduit Caps

Figure 10End Bell

Figure 11 Cable Protector

6”

Figure 12Snap-N-Stac Combo Spacers

A B

DC

AB

E


Rev. #14: 07-01-14 062288 Page 7 of 22


Table 12 Codes for Rigid Conduit Caps and Cap Plugs

Conduit Size (inches)Codes

Rigid Cap Cap Plug2 360425 3604403 360426 3604414 360428 3604435 360429 3604446 360488 360494

Table 13 Codes for End BellsConduit Size (inches) Code

2 3604203 3604214 3604235 3604246 360487

Table 14 Codes for Cable Protectors 1

Conduit Size (inches) Code2 3820343

382032456

1 Not for new installations; for replacement only.

1

Table 15 Codes for Snap-N-Stack Combo Spacers 1

ConduitSize

(inches)

Duct OD

(inches)

HorizontalDuct

Positions

Dimensions (inches) MaterialCodesA B C D E

3 3.5 2 2 5.5 3.63 5.38 11 3604594 4.5 2 2 6.5 3.88 6.06 13 3604605 5.5 2 2 7.56 4.38 7.25 15.12 3604616 6.625 2 2 8.62 4.13 7.38 17.25 360491

1 Cable spacers allow only for 2” separation between conduits. Cable spacersare used only where is required to route around existing obstructions. Thus,locations where cable spacers are needed are exempt from the requirement ofmaintaining 3” separation between 600 A distribution circuits.

Figure 135� Coupling

StandardCoupling

R

45�

90�

R

Figure 1422-1/2� PVC Conduit Bend

StandardCoupling

Figure 1545� PVC Conduit Bend

22-1/2�

Figure 1690� PVC Conduit Bend

R


Rev. #14: 07-01-14062288 Page 8 of 22


Table 16 Codes for DB120 PVC Conduit Bends (sweeps)


SweepCode

DegreeRadius(inches)

2

5 30 360458

11-1/424 36079736 360798

22-1/224 36079536 360796

4524 36039136 360794

9024 36039336 026491

3

5 36 36039911-1/4 36 36080122-1/2 36 360800

45 36 360403

9024 36040536 360328

4

5 36 360400

11-1/436 36080460 360805

22-1/236 36076060 360761

4536 36041260 360413

9036 36041460 360415

5

5 48 360407

11-1/436 36080860 360809

22-1/236 36080660 360763

4536 36041660 360417

9036 36041860 360419

6

5 60 36049511-1/4 60 36081122-1/2 60 360765

4536 36048560 360486

9036 360483

60 360484

Figure 17Typical Application of 5� Couplings

Straight RunRigid Conduit Segments (see Table 17 for lengths)

5� Couplings(see Figure 13on Page 8)

Straight Run

Angle of Bend ��

2-1/2�

90�

Radius of Bend (R)

ExampleRadius Bend (R) = 60 FeetAngle of Bend (�) = 45�

From Table 17 The nearest value to 60-foot radius is 57’ 6”.The length of conduit segments = 5 feet.

From Table 18 For a 45� angle bend:The number of 5� couplings required = 9.The number of conduit segments required = 8.


Rev. #14: 07-01-14 062288 Page 9 of 22

Large Radius Sweeps

Table 17 Length of Rigid PVC Conduit SegmentsApproximate

Radius of Bend(R)

Length of RigidConduit Segments

(feet)11’ 6” 117’ 3” 1.523’ 0” 228’ 9” 2.534’ 6” 340’ 3” 3.546’ 0” 451’ 9” 4.557’ 6” 569’ 0” 680’ 6” 792’ 0” 8

Table 18 Number of Couplings and ConduitSegments Required

Angle of Bend(�)

Number of Couplings andOutside Diameter Conduit

Segments RequiredCoupling Conduit

15� 3 230� 6 545� 9 860� 12 1175� 15 1490� 18 17

Figure 18Smooth-Core Conduit

Figure 19Corrugated Core Flex Conduit

Wall Thickness

IDOD

OD

Wall Thickness

ID


Rev. #14: 07-01-14062288 Page 10 of 22

Flexible (HDPE) Conduit and Fittings

Table 19 Data and Codes for Smooth-Core Conduit w/Couplers(20’ length) 1, 2

ConduitSize

(inches)

Dimension (inches) MinimumBendingRadius(feet)

CodeOutsideDiameter

InsideDiameter

Wall Thickness

3 3.5 2.975 .263 6 360094

4 4.965 4.124 .420 8 360335

6 6.890 5.860 .515 12 3601281 Conduit can be used in areas with minor soil settlement issues

or for large radius sweeps.2 Inside wall is smooth.

Table 20 Data and Codes for Corrugated Core Flex ConduitWith Couplers (250’ coil) 1 2 3

ConduitSize

(inches)

Dimension (inches)CodeOutside

DiameterInside

DiameterWall

Thickness

2 2.375 2.050 .163 360095

3 3.500 2.950 .275 360096

4 4.750 3.975 .387 3600971 Conduit can be used in areas minor soil settlement issues or for

re-routes.2 Inside wall is corrugated.3 Minimum bending radius is 24 inches for all sizes.

Figure 20Key-Lock� Couplers

Smooth Inner WallLower Coefficient

O-Ring GasketAir and Wartertight

Key-Lock StripNo Glue

Corrugated Outer WallHigh Crush Strength

Key-Lock� CouplingQuick, field Assembly


Rev. #14: 07-01-14 062288 Page 11 of 22

Flexible (HDPE) Conduit and Fittings (continued)

Table 21 Data and Codes for Key-Lock�Couplers 1


Insertion Lengths(inches) Code

2 2.725 360102

3 3.125 360103

4 2 2.875 360129

4 3 3.00 360104

4 4 2.875 360105

4 4.205 3601301 Kit has coupler, two locks and two gaskets.2 Coupler to connect smooth-core to smooth-core conduit.3 Coupler to connect smooth-core to corrugated core flex

conduit.4 Coupler to connect corrugated core flex to corrugated core

flex.


Rev. #14: 07-01-14062288 Page 12 of 22


Install the Key-Lock Coupler Following the Procedure Below

1. Make certain the elastomeric gasket is seated in the second corrugation on 4” conduit and the first corrugation on6” conduit. Be sure the gasket is positioned as shown on Figure 21.

Figure 21Key-Lock� Couplers Gasket Position

2. Use only a water-based lubricant. Apply the lubricant to the outside surface of the gasket. A light coating oflubricant should also be applied to the chamfered leading edge of the coupler as shown on Figure 22.

Figure 22Key-Lock� Couplers Lubricant Application

3. Insert the gasketed end of the Smooth-Cor� conduit into the coupler. Note the black home-mark, which is usedto identify proper coupling as shown on Figure 23.

Figure 23Key-Lock� Couplers Insertion


Rev. #14: 07-01-14 062288 Page 13 of 22


Install the Key-Lock Coupler Following the Procedure Below (continued)

4. Use a mallet and wood block to seat the coupler until the home-mark is covered. Note that the small lock ring onthe inside surface of the coupler snaps into a matching corrugation as shown on Figure 24.

Figure 24Key-Lock� Couplers Locked in Place

5. Insert the Key-Lock� strip following the directional arrow into the pre-drilled hole in the coupler. Apply a smallamount of lubricant to aid in the insertion. Push the Key-Lock� strip (in the direction of the arrow on the label)around the entire circumference, locking the grooves in the conduit and coupler securely together. Trim theexcess Key-Lock� strip material from the coupler (optional). See Figure 25 below.

Figure 25Key-Lock� Couplers Strip Insertion


Rev. #14: 07-01-14062288 Page 14 of 22


Install the Key-Lock Coupler Following the Procedure Below (continued)

Note: When cutting the Smooth-Cor® conduit in the field to a custom length, it necessary to follow the stepsbelow:

1. Cut the conduit at the selected corrugation valley.

2. Place the gasket over the newly cut and cleaned end, making certain to seat the gasket on the secondcorrugation for 4” conduit and on the 6” conduit. The higher ridge of the elastomeric seal is positioned toward thebody of the conduit and the lower ridge toward the end of the conduit. Using a felt marker, place a home-mark onthe conduit to achieve proper coupling. When using 4” conduit, place the home-mark on the seventh corrugation;for the 6” conduit, place the home-mark on the fourth corrugation. Repeat steps 2-5 as shown on Page 12 and 13to complete coupling. See Figure 26.

Figure 26Key-Lock� Couplers Cut at Customized Length

Home-MarkElastomericGasket

Seating Surfaces

ElastomericGasket

Home-Mark

Seating Surfaces

4” Smooth-Cor® 6” Smooth-Cor®

Figure 27Key-Lock� Adapter

Figure 28Key-Lock� Bell End Adapter

Smooth-Core

Adapter

Conduit

Length

Length


Rev. #14: 07-01-14 062288 Page 15 of 22


Table 22 Data and Codes for Key-Lock� AdapterSmooth-Core-Shur-Lock Kit� 1


Dimension(inches) CodeLength

2 6.7 360106

3 6.63 360107

4 2 8.0 360131

4 3 8.0 360108

6 11.63 3601321 Kit has adapter, two locks, and two gaskets.2 Adapter to connect smooth-core to smooth-core

conduit.3 Adapter to connect corrugated core flex to

corrugated core flex conduit.

Table 23 Required Rigid PVC stub out lengthConduit Size

(inches)PVC Stub Out

(inches)

2 14.83 14.54 156 17.5

1 Stub out length needed to provide enough space forthe adapter to connect rigid PVC to flexible conduit.

Table 24 Data and Codes for Key-Lock� BellEnd Adapters Smooth-Core Bell


Dimension(inches) CodeLength

2 7.38 360109

3 7.25 360110

4 1 7.5 360133

4 2 7.5 360111

6 8.75 3601341 Adapter to connect to smooth-core to

smooth-core conduit.2 Adapter to connect corrugated core flex to

corrugated core flex conduit.

Figure 29Tapered Plugs

Figure 30Pre-Formed Sweeps


Rev. #14: 07-01-14062288 Page 16 of 22


Table 25 Codes for Tapered Plugs

Tapered Plug(inches) Code

2 360112

3 360113

4 360114

6 360115

Table 26 Codes for Key-Lock� Strip Replacement 1

Key-Lock Strip(inches) Color

Length(inches)

Bell Diameter (inches) Code

2 Lime 12 2.75 360121

3 Lavender 16.5 4.37 360122

4 Gray 19.5 4.82 360123

6 Blue 28.5 7.0 3601241 See Figure 21 for Key-Lock� picture.

Table 27 Codes for O-Ring Gasket Seals 1

Tapered Plug(inches) Code

2 360125

3 360126

4 360135

6 3601361 See Figure 21 for O-Ring Gasket Picture.

Table 28 Pre-Formed Sweeps Smooth Wall HDPE

Conduit Size(inches) Degree

Radius(inches) Code

2 90 36 360116

3 90 36 360117

4 90 36 360118

4 90 48 360119

6 90 60 360120


Rev. #14: 07-01-14 062288 Page 17 of 22

Trench Requirements

Notes

1. Field conditions may require a minimum depth greater than shown.

2. Maintain 3-inch separation between ducts for primary and secondary distribution circuits.

3. Sharp turns, bends, or other irregularities in the conduit must be avoided.

4. If the bottom of a trench which will contain plastic conduit is rocky, use backfill material conforming to therequirements of Engineering Material Specification 4123. Before tamping in the area of plastic conduit, applyat least 6 inches of backfill over the top of the conduit to avoid breakage. Final backfill may then be placed inthe trench and tamping employed to finish grade. In order to reduce costs, the soil originally removed from thetrench should be used as backfill wherever possible (see Note 13 on Page 2).

5. Do not use salt-water sand backfill with steel conduit.

6. Other utility practices may require a greater minimum conduit separation.

7. Refer to state of California, Department of Industrial Relations; Trench Construction Safety Orders for trenchconstruction requirements. These orders are issued by the Department of Occupational Safety and Health.

8. When crossing obstructions, such as shown in Figure 34 and Figure 35 on Page 18, maintain 6-inch minimumseparation.

3’ 0”Minimum

Figure 31Secondary/Service

or StreetlightTrench

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ

Figure 32Primary Trench

Backfill(see Note 4)

Secondary orStreetlight

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ

12” min.

3”Primary

See Note 2

24”Min.

12” min.

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Rev. #14: 07-01-14062288 Page 18 of 22

Conduit Construction, Built-up Method

Spacer(see Table 15 on Page 7)

Figure 33Typical Straight Run Installation

(5” conduit, 6-way shown)

Figure 34Typical Perspective View of

Installation Around Obstruction

Figure 35Typical Perspective View of

Installation Under Obstruction

3” 3”2”

8”4’ 0” to 6’ 0” 4’ 0” to 6’ 0”

A

A

3”

1”

1”

3”

Plastic Conduit(see Table 6 on Page 5)

Bottom of Trench

ConcreteEnvelope

Obstruction

Bottom of Trench

This spacer is to be used only where it isrequired to route around existing obstructions(see Table 15 on on Page 7).

Reinforcing Steel Rods

Coupling(see Table 7 on Page 5)

Obstruction


Section A-A

Bottom of Trench

Coupling(see Table 7 on Page 5)


Spacer(see Table 15on Page 7)

8”


Rev. #14: 07-01-14 062288 Page 19 of 22

Construction and Termination of Conduit Line

Notes1. Slope the conduit sufficiently to provide adequate drainage. On level ground, slope the duct line from the

center to each manhole.

2. Local city ordinances may require a minimum cover greater than PG&E’s requirements of 24” for conduitscontaining circuits energized at 750 volts or less, and 36” for conduits containing circuits energized in excessof 750 volts. Depth may be reduced in either case if adequate mechanical protection − as defined in Section3.3.6 of the Greenbook − is provided.

3. Where required, the depth of the conduit window may be increased. Where this is necessary, tie the conduitenvelope concrete into the manhole reinforcing steel.

4. Vertical staggering of conduits at entrance shown in Detail A will assist in arranging for cable crossover if required.

B B

Manhole Cover Manhole CoverPlan View

Level Street Surface

C

C

C

C

Slope

See Note 1

SlopeFigure 36

Sectional ElevationLevel Grade

Figure 37Sectional Elevation

Steep Grade

Roof of Manhole

8”

4” Approx.(see Note 3)

Roof of Manhole Roof of Manhole

3”3”Duct Terminatoror End Bell

Plastic Conduit

Section C-CConduit Window

(6-way conduit formation shown)

Detail A Staggered Window

(see Note 4)

Section B-B

3”Approx.

3” Approx.

Plastic Conduit(see Table 6on Page 5)

Duct Terminator orEnd Bell

Inside ofManhole Wall

3” Approx.

6”

3”Approx.

3’ 0” Min. (see Note 2)

6”

3’ 0” Minimum(see Note 2)

Steep Street Surface

6”

6”

3”

3”

24”Approx.

24”Approx.

3”3”

3”

3”

Figure 38Single Conduit Configuration

W

H

W

3”

3”

3”3”

3”

3” 3”

3”

3”

Figure 39Two, Four, and Six-Way Conduit Configuration

3”

3”3”

W

H

H

H

W


Rev. #14: 07-01-14062288 Page 20 of 22

Conduit Configuration TablesNotes

1. For conduit lines four-way and larger in fill areas or areas of known differential ground settlement, install#4 reinforcing bars in all four corners of the conduit envelope. Overlap bars 15 inches and install aminimum of 3 inches from the top or bottom and 1 inch from the side of the envelope.

2. Where the width of the trench is greater than the required width of the envelope, the horizontal spacingbetween conduits may be increased as long as 3-inch spacing between the conduit and the outside edge ofthe envelope is maintained.

Table 29 Dimensions for Single Conduit Configurations

Conduit Envelope Dim. Concrete Reqd.Cubic Yardsper 100 ft. 1Description Size W H

Single

2” 8-1/2” 8-1/2” 1.9

3” 9-1/2” 9-1/2” 2.3

4” 10-1/2” 10-1/2” 2.8

5” 11-1/2” 11-1/2” 3.1

6” 12-1/2” 12-1/2” 3.41 Quantities are approximate and include 10% added for

variations encountered in construction.

Table 30 Dimensions for Multiple Conduit Configurations

Conduit Envelope Dim. Concrete Reqd.Cubic Yardsper 100 ft. 1Description Size W H

2-way

3” 14-1/2” 9-1/2” 3.44” 17” 10-1/2” 4.05” 19” 11-1/2” 5.26” 23-1/2” 12-1/2” 6.4

4-way4” 17” 17” 6.25” 19” 19” 8.26” 23-1/2” 23-1/2” 11.7

6-way4” 16-1/2” 24” 7.85” 19” 27” 11.06” 23-1/2” 30” 12.7

8-way4” 17” 31” 9.75” 19” 35” 13.86” 23-1/2” 39” 15.1

1 Quantities are approximate and include 10% added forvariations encountered in construction.


Rev. #14: 07-01-14 062288 Page 21 of 22

Instructions for Sealing Conduit

Notes

1. Within minutes, polyurethane foam expands to form a water and gas barrier that can be easily removed inthe future.

2. Consult the manufacturer’s instructions included in each kit.

Figure 40Details of a Polyurethane Seal

Polyurethane SealantConduit

Front Dam (packing)Duct Terminator

Back Dam

Cables

Chamber6” Min.

Step 1 Wipe off loose dirt and grime from cables.

Step 2 Install front dam (packing). Wind a strip of packing around each cable. Push the dam approximately 6 inchesto 8 inches into the conduit. Install the back dam in the same manner as the front dam, and push it into theconduit until the dam is flush with the duct terminator.

Figure 41 Back Dam Flush With Duct TerminatorStep 3 Insert the nozzle into the chamber between the dams and inject polyurethane.

Figure 42

6”

Polyurethane Sealant

Table 31 Codes for Polyurethane Conduit Seal KitsConduit Size Code Manufacturer Catalog Number

2” Through 6”019178 Dura-Line (Arnco)

Hydro SealS-60-C6P

490813 Polywater FST-250KIT-PGE

Figure 43Termination Enclosure Riser Seal

3/16”Allen Screw

NeopreneGasket


Rev. #14: 07-01-14062288 Page 22 of 22

Instructions for Sealing Conduit (continued)

Termination Enclosure Riser Seal Method

Step 1 Place the residential riser seal on the cable and slowly push it into the mouth of the riser conduit. Turn theAllen screw until the neoprene gasket expands to form a tight seal.

Step 2 This riser seal is to be used to seal the riser conduit at the customer’s service termination enclosure only. The topof the service riser is the preferred location. Belowground use is approved if an alternative to foam is needed.

Table 32 Codes for Termination Enclosure Riser Seals

ConduitSize Cable Size Code

Manufacturer and Catalog No.Environmental Solutions Cat.

2”1/0 Triplex 019179 ESC − 103

4/0 Triplex 019180 ESC − 403

Revision Notes

Revision 14 has the following changes:

1. Revised Note 19 on Page 2.

2. Revised Note 2 on Page17.

3. Revised table Footnote 1 for Table 19 and Table 20 on Page 10.

4. Added Table 23 on Page 15.

5. Revised Table 31 on Page 21.

UG-1: TransformersGreenbook

Rev. #12: 04−15−09 045292 Page 1 of 8

045292

Function:Asset Type:

Issued by: Date: 04−15−09

Rev. #12: This document replaces PG&E Document 045292, Rev. #11. For a description of the changes, see Page 8.

CONCRETE PAD FOR THREE-PHASE, LOOP-STYLE,PAD-MOUNTED TRANSFORMERS

Prepared by: ABB1

Electric Distribution Design

Connie Pascua (CZP1)

This document is also included in the following manual:

• Electric and Gas Service Requirements Manual (Greenbook)Purpose and ScopeThis document shows construction details for concrete pads for three-phase, loop-style, pad-mounted transformers. Referto Document 043817 for installation details of three-phase, radial-style, pad-mounted transformers. See Document 045290and Document 045291 for fabrication and installation details of three-phase, loop-style, pad-mounted transformers.

General Information1. When a pad is installed by the customer, that customer shall provide all materials. In areas of known unusually

soft soil conditions, PG&E will require special treatment as specified in Notes 12, 13, and 14. Before pouring orsetting the pad, the customer or contractor will request an inspection by PG&E to approve the installation.PG&E shall determine the acceptability of each pad installation.

2. The installation of the pad includes the two ground rods and the interconnecting ground wire.

Application

3. If a pad-mounted transformer cannot be located away from vehicular traffic, the customer shall providesuitable barriers for the protection of the transformer. PG&E shall determine the protection requirementsaccording to Document 051122.

4. If the customer is to use bus duct, the secondary opening is not needed. Grout in the window of precast pads.

5. The pad sizes are based on maximum dimensions, including cooling radiators, of the various manufacturers’transformers.

6. The Style IIE transformers will fit on Style IIB/IIC/llF pads. The 75 kVA, Style IIE transformer will fit on thelargest Style IIE pad. The 300 kVA, Style IIE transformer will fit on the small Style IIE pad. The 2,500 kVA,Style IIE transformer will sit on the old 80” x 106” pad, but the radiators will overhang the pad. (Note: Some1989 and 1999 Style IIE transformers have radiators that will overhang the pad.)

7. The Style IIG will fit on the largest IIE pad.

8. The Style IIH will fit on the largest IIC/IIF pad.

Construction Notes

9. In general, all equipment pads should be installed as level as practical. Pads supporting oil-filled equipmentmust be leveled to within 1 inch in 8 feet in all directions.

10. The transformer pad shall be placed on firm, compacted native material or on engineered fill which has beencompacted at least to the requirements of Note 13.

11. The area under the pad shall be excavated to the required grade, or to a depth necessary to reach firm,undisturbed material, whichever is deeper. The material can be considered firm if it cannot be penetrated bythumb except with moderate effort.

12. If firm material has not been reached within a depth of 3 feet, excavate 3 feet beyond the perimeter of the padand backfill the entire excavated area to the required grade and to the requirements of Note 13.

13. In case it has been necessary to excavate deeper than the required grade to reach firm material, backfill to therequired grade in one of the following ways:

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UG-1: TransformersGreenbook Concrete Pad for Three-Phase, Loop-Style,

Pad-Mounted Transformers

Rev. #12: 04−15−09045292 Page 2 of 8

A. Backfill with clean, non-expansive soil compacted to 90% of maximum density. Soil shall be placed in layersnot more than 8 inches thick before compaction. Maximum density and in-place density is to be determined byCalifornia Test Method No. 216-G, Part I and II respectively, or by ASTM D-1556 and ASTM D-1557respectively. A copy of the test results may be required by PG&E.

B. Backfill with soil-cement slurry consisting of one sack of Portland cement per cubic yard and clean native soil orsand. When slurry is used as a backfill material, the customer will not be required to use a poured-in-place pad.

14. In areas of known soft soil conditions, trenches within the pad excavation area for the installation of conduitsshall be backfilled in one of the ways specified in Note 13 on Page 1.

15. In addition to the above, precast pads shall be placed on a 3-inch layer of slurry backfill or sand screeded levelto provide uniform bearing.

16. Conduit windows shall be grouted with non-shrink grout (asphalt or blacktop is not approved for grouting).

17. Concrete shall be designed to attain a strength of 2,500 pounds per square inch (psi) at 28 days. Slump forconcrete placement shall not exceed 3 inches. Reinforcing steel shall be per ASTM A615, Grade 40 minimum.

18. A minimum distance of 6 feet shall be maintained between ground rods.

19. Wood-float or light broom finish the top of the slab. Finish all exposed edges with a finishing tool. Verticaledges shall have a 3/4-inch chamfer. Slope exposed horizontal surfaces slightly for drainage. Moist-cureconcrete for at least 7 days after pouring. Do not install transformer until 14 days after pouring concrete. SeeNote 20 for exceptions to this requirement.

20. The transformer may be installed earlier than the 14 days specified above, provided the concrete has attaineda compressive strength of at least 1,500 psi obtained as follows (this procedure is permitted only for urgentcases where earlier pouring of pad is not practical):

A. For a six-sack mix using normal Portland cement, the transformer may be installed after 7 days; or for asix-sack mix using high early-strength cement, the transformer may be installed after 72 hours.

B. All concrete must be moist-cured to the minimum period specified above before installing the transformer.

C. Verify the required strength by either concrete cylinder test or Schmidt hammer test.

21. Belled ends of conduits should be placed approximately 1 inch above the concrete pad surface. If belled ends areremoved, install end bell fittings. Temporarily plug or cap all conduits.

22. Only PG&E-approved utility electric-service-related equipment and structures may be installed in the areabeneath the transformer pad. The area 6 feet deep and 12 inches horizontally around the pad shall be free ofall foreign substructures.

Construction Notes for Precast Pads

23. Concrete shall be designed to attain a strength of 2,500 psi in 28 days.24. Inserts and securing of inserts shall be of sufficient strength to lift the pad. A minimum of three inserts with 7/8-inch

diameter, UNC thread and 2-1/4 inch inside depth, steel, galvanized with temporary plugs shall be provided.

25. Inserts shall be installed flush with the surface of the pad.

26. Reinforcing bars shall be as per ASTM A615, Grade 40 minimum.

27. All exposed edges shall have a 3/4-inch chamfer or radius.

28. Surface shall have a light broom or wood-float finish.

29. The surface of the pad shall be level and flat.

30. Precast pads shall be permanently identified with manufacturer’s name (for location see Figure 4 and Figure 5on Pages 7 and 8) and have the weight stenciled on top of the pad.

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UG-1: TransformersGreenbookConcrete Pad for Three-Phase, Loop-Style,


Rev. #12: 04−15−09 045292 Page 3 of 8

References Location DocumentCorrosion Resistant Ground Rods and Ground Rod Clamps UG-1: Connectors/Greenbook 013109. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation of Three-Phase, Radial-Style, Pad-Mounted Transformers UG-1: Transformers 043817. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loop-Style, Three-Phase, Pad Mounted Transformers UG-1: Transformers 045290. . . . . . . . . . . . . . . . . . Installation of Loop-Style, Three-Phase, Pad-Mounted Transformers UG-1:Transformers 045291. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Location, Clearances, and Mechanical Protection Details for Pad-Mounted and Subsurface Equipment UG-1: General 051122. . . . . . . . . . . . . . . . . . . . . . Underground Conduits UG-1: Conduits 062288. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Rev. #12: 04−15−09045292 Page 4 of 8

Table 1 Bill of Materials for Concrete Transformer Pads

Item Quantity Description Code Document

1 1 Pad, Concrete, Reinforced (see Page 5) − −

2 As Required Wire, #2 AWG, Solid, Soft Drawn, Bare Copper 1 290074 −

3 2 Ground Rod, 5/8” x 8’, Copperclad 187013013109

4 2 Clamp, Ground Rod, for Item 3 187012

5 As Required Conduit, Type and Size (as required) − 062288

6 As Required Reinforcing Steel, Number 4 2 − −

7 As Required Compacted Backfill − −

8 Tool Bolt, Eye, 7/8” Diameter x 1-1/2” Long, 1-1/2” Inside Diameter,Shoulder-Type 190013 −

1 When pad is installed for PG&E by others, the use of solid or stranded wire is acceptable.2 Number 3 rebar at 12-inch maximum separation with 4x4 6-6 wire mesh over the entire surface may be

substituted for the use of Number 4 rebar.

Detail A Lifting Eye for Pad and Boxes

1-1/2” Inside Diameter

7/8” Diameter (UNC thread)

1-1/2”

8

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Rev. #12: 04−15−09 045292 Page 5 of 8

Pad Arrangements for Style IIA, IIB, IIC, IIF, and IIH TransformersNotes

1. Primary conduits must be centered in the window.

2. Secondary conduits shall be grouped towards the front of the pad.3. Precast pads do not have cut off walls.

4. A 6-foot minimum separation shall be maintained between ground rods.

5. The ground wire must be a continuous wire that runs from the outside ground rod, under the pad, to theprimary window, then above the pad from the primary window, through the secondary window, to thesecondary ground rod as shown below.

Section A-A

SeeNote 4

2” Max.

A A

See Note 10 on Page 1Front

Inside Edgeof Cut Off Wall

See Note 10on Page 1

3”

Above Pad

Grout in Around Primaryand Secondary Conduits

1” Approx.

Figure 1 Style IIA, IIB, IIC, IIF, and IIH Pad Arrangement,

Poured-in-Place Pad Shown

Plan View

6”

2” ± 1”

34

2

5

3 4

1

24

3

3 4

7

8”Min.

1

Primary Secondary

Primary Secondary



Rev. #12: 04−15−09045292 Page 6 of 8

Pad Arrangements for Style IID, IIE, and IIG TransformersNotes

1. Install primary conduits as shown. Keep single primary conduit installation to the left as indicated to reducestrain on elbow terminators.

2. Secondary conduits shall be grouped towards the front of the pad.

3. Precast pads do not have cut off walls.

4. A 6-foot minimum separation shall be maintained between ground rods.5. The ground wire must be a continuous wire that runs from the outside ground rod, under the pad, to the

primary window, then above the pad from the primary window, through the secondary window, to thesecondary ground rod as shown below.

6”

Section B-B

1” Approx.(see Note 21

on Page 2)

C C

Front

4”

SeeNote 4

Finished

Grade Level


3”

Above Pad

8” Min.

Plan View

Figure 2 Loop Installation of Style IID, IIE, and IIGPadArrangement, Poured-in-Place Pad Shown

43

2

5 3 4

3 4

72

3

4

2” ± 1”

Primary Secondary

PrimarySecondary

B

Front

9”4”

SeeNote 4

Plan View

4

3

2

5 3 4

PrimarySecondary

6”

Section C-C

1” Approx.(see Note 21

on Page 2)

Finished

Grade Level


3”

Above Pad

8” Min.

Figure 3 Radial Installation of Style IID, IIE, and IIG Pad

Arrangement, Poured-in-Place Pad Shown

3 4

72

3

4

2” ± 1”

Primary Secondary

B

4.5”

CL



Rev. #12: 04−15−09 045292 Page 7 of 8

Concrete Pad Details for Style IIA, IIB, IIC, IIF, and llH Transformers

EDA CB

#4 CornerBars

2” Min.Typ.

Front

7/8” Insert,Galvanized

(see Notes 24and 25 onPage 2)

#4 at 12” Maximum EachWay

6Location ofManufacturer’sName, (see Note 30on Page 2)

6”

4” All Around

3”12”

Min.

10”

Min.

Poured‐in‐Place Pad

Precast Pad

6”

Figure 4 Construction Details of Style II A/B/C/F/H Pad(see Figure 1 on Page 5 for pad arrangement)

C C

Section C‐C

G

K

W

6

F

H

L6

Table 2 Dimensions and Codes for Style IIA, IIB, IIC, IIF, and llH Transformer Pads 1

Transformer Pad Dimensions (inches)Code

Style kVA SizeApproximate

Maximum Weight (lbs) A B C D E F G H K L W

IIA

75 3,200

21 8 14 16 13 15 16 16 15 72 72 043436

(112.5) 2 3,200

150 3,500

(225) 2 4,000

300 4,500

IIBandIIF

(225) 2 4,50023

8 19 17

13

15 16 19 15

78 80 043538300 5,000

(500) 2 6,000 29 23 100 96 040242

750 9,000 32 22 112 98 040243

1,000 11,000 36 26 117 106 040244

IICandIIF

1,500 13,000

31 8 23 17 26 15 16 19 15 120 105 040245

(2,000) 2 15,000

IICandIIF

2,500 16,000

IIH2955/3325 22,000

1 See Document 066211 for approved suppliers.2 ( ) = Indicates a kVA size that is no longer purchased.

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Rev. #12: 04−15−09045292 Page 8 of 8

Concrete Pad Details for Style IID, IIE, and IIG Transformers

Location of Mfr.Name, (see Note30 on Page 2)

2” Min.Typ.

7/8” Insert, Galvanized (see Notes 24 and 25 on Page 2)

D D

#4 at 12” Maximum Each Way

Figure 5 Construction Details of Style IID, IIE, IIG Pad

(see Figure 2 on Page 6 for pad arrangement)

4” AllAround

12”

Min.

6” 3”

10”

Min.

Poured-in-Place Pad

6”

Front

Section D-D

Precast Pad

6

6

B C DW

A E

K

G

#4 Corner Bars6

H

F

L

Table 3 Dimensions and Codes for Style IID, IIE, and IIG Transformer Pads 1

Transformer Pad Dimensions (inches)

CodeStyle kVA Size

ApproximateMaximum Weight

(lbs)A B C D E F G H K L W

IID

and

IIE

75 4,600

17 16 15 19 13 10 6 17 14 61 80 040291(112.5) 2 4,800

150 5,000(225) 2 5,500

IIE

300 5,800

22 16 15 20 17 20 6 19 25 106 90 040292(500) 2 6,100

750 9,0001,000 11,0001,500 13,000

IIE 2,500 16,00022 16 15 20 17 20 6 19 25 106 90 040292

IIG 2955/3325 22,0001 See Document 066211 for approved suppliers.2 ( ) = Indicates a kVA size that is no longer purchased.

Revision Notes

Revision 12 has the following changes:

1. Added Notes 7 and 8 to Application notes on Page 1.

2. Added Transformer IIH to Pad Arrangements on Page 5.

3. Added Transformer IIG to Pad Arrangements on Page 6.

4. Added Transformer IIH to Concrete Pad Details and revised Table 2 on Page 7.

5. Added Transformer IIG to Concrete Pad Details and revised Table 3 on Page 8.

UG-1: GeneralGreenbook

Rev. #21: 07-31-15 051122 Page 1 of 28

j

Electric Distribution

051122

DesignFunction:Asset Type:

Issued by: Date:Carlos Araquistain (CJA8) 07-31-15

Rev. #21: This document replaces PG&E Document 051122, Rev. #20 For a description of the changes, see Page 28.

CLEARANCES AND LOCATION REQUIREMENTS FORENCLOSURES, PADS, AND UNDERGROUND EQUIPMENT

Prepared by: ABB1

This document is also included in the following manual:

• Electric and Gas Service Requirements Manual (Greenbook)

Purpose and Scope

This document contains information relating to the placement of electric underground equipment and enclosures. Thisincludes pad-mount, subsurface, and vault installations with or without equipment.

References Location Document

Marking, Numbering, and Identification of Line Structures OH: Marking 022168. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Concrete Pad for Three-Phase, Loop-Style, Pad-Mounted Transformers UG-1: Transformers/Greenbook 045292. . . . . . . . . . . . . . . . . . . . . . . . . . . .Pad-Mounted, Load-Break Switches and Fuses UG-1: Switches 053318. . . . . . . . . . . . . . . . . . . . . . . . . . .Pad-Mounted Transformers Installed Indoors UG-1: Transformers/Greenbook 057521. . . . . . . . . . . . . . . . . .Landscape Screen for Pad-Mounted Transformers UG-1Transformers/Greenbook 063422. . . . . . . . . . . . . .Box-Pad for Pad-Mounted Transformers UG-1: Transformers/Greenbook 064309. . . . . . . . . . . . . . . . . . . . .Pad-Mount Capacitor UG-1: General 066197. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PG&E Approved Manufacturers Greenbook 066211. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installation of Pad-Mounted, Load-Break Junction UG-1: Switches 066212. . . . . . . . . . . . . . . . . . . . . . . . . . .General Order (G.O.) 128 TIL G.O. 128. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .California Administrative Code:Title 8 − Industrial Relations, Chapter 4, Sub-Chapter 5, Electrical Safety OrdersTitle 24 − State Building Standards, Part 3 − California Code of Regulations, California Electric Code

1. Clearances

Clearances are divided into the following sections:

• Building clearances.

• Clearances to foreign substructure.

• Horizontal work space clearances.

• Hazardous locations.

Underground equipment, pads and enclosures shall be located so that they meet or exceed the required clearances ineach of the clearances sections and in each of their subsections.

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Clearances and Location Requirements forEnclosures, Pads, and Underground Equipment

Rev. #21: 07-31-15051122 Page 2 of 28

2. Building Clearances

A. Clearances from building surfaces (see Figure 1): Oil filled pad-mount equipment shall have the followingclearances (based on G.O. 128, Rule 34.3 [D]):

a) 3-foot minimum from combustible building surfaces to the edge of the pad.

b) 2-foot minimum from non-combustible building surfaces to the edge of the pad. Non-combustible materialsinclude brick, clay, concrete, steel, stone, and stucco.

B. Doorway clearance (see Figure 1): Pad-mounted equipment shall not be placed where it impedes the flow oftraffic through a doorway. In general, 4 feet of doorway clearance is sufficient (based on the Uniform BuildingCode).

3’ if Combustible Wall and2’ if Non-Combustible Wall

Figure 1Building and Doorway Clearances

(see Notes 2.A and 2.B)

4’

Prohibited Area

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Rev. #21: 07-31-15 051122 Page 3 of 28

2. Building Clearances (continued)

C. Vertical clearance from overhangs (see Figure 2): To provide space for hoisting equipment so that equipmentcan be replaced, the following vertical clearances from the top of the pad for pad-mounted equipment or top ofthe enclosure for subsurface equipment are required (based on G.O. 128, Rules 17.3 and 34.2).

a) 20-foot minimum for:

� 1∅ pad-mount equipment.

� Subsurface equipment.

� Style MTP 3∅ transformer.

b) 30-foot minimum for:

� 3∅ pad-mount equipment except style MTP transformers.

c) When required for installations such as in dry vaults (Document 057521), the vertical clearance outside thedoorway may be reduced to 10 feet from ground level. This reduced clearance will greatly expand thereplacement time, since the equipment must be jacked and rolled out to a position where the clearance isadequate to hoist it.

Wall

Figure 2 Clearances for Pad-Mounted

or Subsurface Equipment(see Note 2.C)

Overhang

VerticalClearance

D. Railroad or streetcar track clearance: 6-foot minimum clearance is required from the rail to the nearest edge ofany manhole, enclosure, or secondary box (G.O. 128, Rule 31.5 [D]).

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Rev. #21: 07-31-15051122 Page 4 of 28

3. Clearances to Foreign SubstructuresA. Pad-Mounted Equipment:

The area 1 foot around and 6 feet below the pad or pedestal shall be kept free of foreign substructures.

B. Subsurface Equipment or Enclosures:The area 1 foot around and 6 feet below the enclosure shall be kept free of foreign substructures.

4. Work Space RequirementsMaintain work space requirements as indicated on all new installations. Exercise judgement on existing installationswhere encroachment has occurred. For example, a fire hydrant located within the work space that does not adverselyaffect operations is not a concern. Clear and level work areas are required around underground equipment andenclosures to provide an adequate safe working space for operation or maintenance. Obstructions and elevationchanges, other than a standard city/county street curb, are not allowed in the work space.(Based on G.O. 128, Rule 17.3 and 34.2) .

A. Primary enclosures (see Table 1 below and Figure 3 on Page 5): Sufficient clearance to remove covers, operatewith hot sticks, replace equipment and cable, etc., is required. Field conditions and the specific equipment mayallow some of the clearances to be reduced.

Table 1 Primary Enclosure Clearances

Primary Enclosures Required Clearances

Round or Square3’ x 5’ (interior dimensions) 3’ From Outside Edges

4’ x 6’ 6” (interior dimensions) 3’ From the Outside Edge of the Long Side /4’ From the Outside Edge of the Short Side

4’ 6” x 8’ 6” (interior dimensions) 3’ From the Outside Edge of the Long Side /5’ From the Outside Edge of the Short Side

J-Box in 3’ x 5’

3’ on short sides, 2’ on long side adjacent to thejunction bars (the non-operable side), 5’ on thelong side opposite the junction bars (the operable side)

J-Box in 4’ x 6’ 6”


J-Box in 4’ 6” x 8’ 6”


B. Pad-Mounted Equipment (see Figure 4 and Figure 5 on Page 6).

a) 8-foot minimum (measured from the edge of the pad) in front of all equipment doors to provide room tooperate with hot sticks and to replace the equipment. Note: Some equipment types have operable doors inboth the front and the rear, and both require 8 feet of operating room.

b) 3-foot minimum from non-operable sides.Exceptions:

(1) Landscaping obstructions (decorative walls, planters, rocks, etc.) that are up to about 1 foot wide and2 feet tall may be placed next to the pad on non-operable sides (refer to Document 063422).

(2) One of the 3-foot dimensions may be reduced to 2 feet where Note 2.A.b on Page 2 applies, except forpad-mount switchgear.

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Rev. #21: 07-31-15 051122 Page 5 of 28

C. Secondary Enclosures − Minimum Work Space Required:

a) Pedestal: 3 feet in front, 2 feet to the side, and 1 foot to the back.4. Work Space Requirements (continued)

2’2’

1’

Front

3’

b) Secondary Splice Box − 24” x 36” or smaller: 3 feet on short sides, 2 feet on one long side.

2’

3’3’

c) Secondary Splice Box − 3’ x 5’ or larger: Same as Table 2.

SubsurfaceEquipment

Retaining Walls(see Figure 8 andFigure 9 on Page 9)

SubsurfaceEquipment

orEnclosures

Edge of Slope

Plan ViewProfile

3’

Figure 3 Example of Subsurface Equipment or Enclosures Installed on

Sloped Terrain(see Note 4.A on Page 4)

3’3'3'

X

X

X = 3’ for Round or SquareX = 3’ for 3’ x 5’X = 5’ for 4’ 6” x 8’ 6”



Rev. #21: 07-31-15051122 Page 6 of 28

4. Work Space Requirements (continued)

Pad-MountedEquipment

Pad-MountedEquipment

Edge of Slope

Retaining Wall

Retaining Walls(see Figure 8 andFigure 9 on Page 9)

Plan Profile@@@@

Figure 4 Example of Pad-Mounted Equipment (with front doors only) Installed on Sloped Terrain

(see Note 4.B on Page 4)

8'

3'

3'

3'

3'8'

@@@@

Figure 5 Work Space for Pad-Mounted Equipment

(with front and rear doors including most switches and capacitors)(see Note 4.B on Page 4)

Pad-Mount With Front and Rear Doors

8'8'

3'

3'

5. Hazardous LocationsUse the following guide when installing pad-mounted and subsurface equipment in areas where hazardous liquidsand gases are dispensed or stored in sealed containers.

A. Liquified flammable gases: Do not install pad-mounted or subsurface equipment within 20 feet of a gas dispenserwithout conforming to the regulations concerning installation of electrical equipment in hazardous areas (refer toArticles E500-1, E500-2, E500-3, E514-1, and E514-2 of Title 24, Part 3, State Building Standards). Examples: Gas station fuel pump, convenience store propane pump.

B. Any container which stores flammable liquid or gas: These containers will be considered equivalent to“combustible walls”. Therefore, the required clearances are the same as established in Note 2.A.a on Page 2 ofthis document. Examples: Emergency generator, propane tank at a house.

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Rev. #21: 07-31-15 051122 Page 7 of 28

6. Spill Prevention Control and Countermeasure (SPCC) and Oil ContainmentIt is the customer’s responsibility to comply with spill prevention and containment requirements for oil-filledelectrical equipment in accordance with applicable laws, regulations, and ordinances. The Spill PreventionControl and Countermeasure (SPCC) regulations and the Uniform Fire Code (UFC) require the installation ofcontainment structures to prevent spills and leaks of oil from reaching a waterway. SPCC requirements arefound in the Code of Federal Regulations, Title 40, Part 112 and apply to facilities having a total quantity of oilexceeding 1,320 gallons. The requirements of UFC Articles 79 and 80 may also apply to containers andequipment holding more than 55 gallons of oil. These regulations include information on the type and size ofthe containment needed. Additional containment requirements may be mandated in local hazardous materialsordinances.

7. Future ConstructionConsideration should be given not only to conditions existing at the time of installation but also to possible futurestructures and equipment that could interfere with required clearances or accessibility. On those installationswhere there is a high probability of a future obstruction, install a clearance requirement sign (Code 373998) on the equipment.

8. Noise ControlTransformer noise level increases with the kVA size. Avoid placing transformers alongside bedrooms and otherplaces where noise may be objectionable.

9. Retaining WallsA. Retaining walls are required when PG&E determines that it is necessary to protect equipment or enclosures

against landslides, drainage wash, drifting sands, etc. The applicant is responsible for the installation andmaintenance of the retaining walls and any associated safety rail. The retaining wall will be designed to provide abarrier of sufficient strength and suitable construction to provide adequate protection and working space aroundthe enclosure or equipment. Typical examples of retaining wall placement are shown in Figure 3 and Figure 4 onPage 6 of this document.

B. Pre-approved retaining wall designs and materials are shown on Pages 8 and 9 of this document.

C. For retaining walls in excess of the dimensions shown on Page 8:

a) The wall will be constructed of precast concrete, concrete poured in place, or concrete block.

b) A safety rail of corrosion resistant material is required at the top of all retaining walls when wall heightexceeds 4 feet (refer to Utility Standard SAFE-1012S for more information).

c) The applicant will provide PG&E with a set of design drawings and structural calculations certified by alicensed civil engineer.

D. Treated redwood or pressure-treated Douglas fir posts (nominal 4” x 4” minimum) and planks (nominal 2 inches orthicker) may be used for short (1 foot or less) retaining walls. Posts should be 24 inches or less in length andextend at least 12 inches below ground and not more than 12 inches above ground (see Page 9).

E. The working area within the retaining wall shall be level.

a) For pad-mounted equipment, it is to be slightly below the pad level (see the appropriate pad document forspecific information).

b) For subsurface enclosures, it is to be level with the enclosure.

F. The working area shall be kept weed free and covered with a locally acceptable decorative covering.

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Rev. #21: 07-31-15051122 Page 8 of 28

10. Precast Retaining Walls

Note

1. For drainage requirements, see Figure 9 on Page 9.

Section A-A Section B-B

2 Angles3” x 3” x 1/2” x 4”Galvanized Each Corner

B B

4’ 6”

4”

2‐1/2”

Corner FastenersNon-CorrosiveMaterial

4”

PlanFigure 6

Concrete Poured in Place orConcrete Block Retaining Wall

A A

4”

6”

6”

#3 Rebar @ 12”Each Way

PlanFigure 7

Precast Concrete Retaining Wall(see Table 2 on Page 8)

4’ 6”

11’ 0”or

15’ 0”

3’ 6” 3’ 6”

2’ 0”24”

15’ 0”or

19’ 0”

15’ 0”or

19’ 0”

11’ 0”or

15’ 0”L L

H H

Table 2 Codes for Precast Retaining Walls

DimensionCode 1

L H

11’ 0”3’ 6”

024881

15’ 0” 0248821 See Document 066211 for approved suppliers.




Rev. #21: 07-31-15 051122 Page 9 of 28

11. Wooden Retaining Walls and Drainage Details for All Retaining Walls

Nut and Washerfor 1/2” Bolt

Carriage Bolt, Galvanized1/2” x Length as Required

Inner Lining (if required)

Post, 4” x 4” Minimum

Plan View Plan View

Figure 8 Wooden Retaining Wall

Figure 9 Drainage for All Types of Retaining Walls

Side View

Side View

3” PerforatedPlastic Pipe,Mirafy ClothAround GranularMaterial and ThenBackfilled

Plank, 2” x 10” x Length as RequiredPlank, 2” x 6” x Length as Required

Concrete

GravelDraining PipeShould Be Slopedto Drain

As Required

5’ 0”Maximum

11’ 0”to

15’ 0”

15’ 0” to 19’ 0”See Figure 3 and

Figure 4 on Page 6for Clearances

12” Minimum

12” Maximum

4” Min.

4’ 6”



Rev. #21: 07-31-15051122 Page 10 of 28

12. Barrier Posts

A. Physical protection from vehicular traffic shall be provided in accordance with the level of vehicular exposure.Barrier posts, etc., are intended to provide reasonable warning from accidental vehicular contact, rather than toprevent all possible contact. When PG&E determines it necessary, the applicant will provide acceptable physicalprotection.

B. In general, pad-mounted equipment having the following setbacks do not require the customer to provide anyother physical protection.

a) Single-family, duplex, and other low density residential areas: 3-foot minimum from the edge of thethoroughfare pavement due to low vehicular traffic (see G.O. 128, Rule 23.6 for definition of thoroughfare).

b) Commercial, apartment, condominium, and other high density areas: 9 feet from the edge of the thoroughfarepavement due to high vehicular traffic and frequent truck-backing.

The design of the particular layout may, of course, call for an increase or decrease in these dimensions. Forexample, a 3-foot setback is often adequate for parts of commercial parking lots where traffic flow isconstrained and backing perpendicular to the curb is unlikely.

C. The posts shown in this document are the standard means for providing such physical protection. Suitablealternatives to these protective posts may be proposed by the applicant for PG&E’s approval.

D. All barrier posts at the same installation site will be the same height.

E. A building wall can be considered as physical protection provided it is located at a point where a post would benormally required.

F. Maintain 36” minimum clearance between barrier posts and the edge of the pad in front of the equipment doorsso that they do not interfere with opening the doors.

G. Certain types of pad-mounted equipment have doors in both front and back and require 36” minimum clearance to thepad on both sides.

H. Use removable posts when:

a) Posts are installed less than 8 feet in front of the equipment’s doors, or

b) Where fixed posts would obstruct access for installation or replacement of equipment.

I. Preferred barrier post arrangements for specific equipment are provided in Figure 11 on Page 12 to Figure 23 onPage 24. These may be modified as needed, to meet specific layouts, but must conform to the requirements inFigure 10 on Page 11.

J. Barrier post details are shown in Figure 24 on Page 25 to Figure 30 on Page 27.

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Protected Device

B2

A1

B1

Figure 10 Generic Barrier Post Placement

A = Distance Between Posts in InchesB = Shortest Distance Between the Protected Device and the Line Between Barrier Posts

Requirements

1. “A” must be less than or equal to 42 inches.2. “B” must be greater than or equal to 12 inches

on non-operable sides.3. “B” must be greater than or equal to 36 inches

on operable sides.4. Bn must be greater than or equal to (An/2)+3.

A3

A2

B3



Rev. #21: 07-31-15 051122 Page 11 of 28

12. Barrier Posts (continued)

Table 3 Common A and B Pairs“A”

(inches)“B”

(inches)

18 1224 1530 1842 2442 36



Rev. #21: 07-31-15051122 Page 12 of 28

13. Preferred Barrier Post Arrangement for Transformers

Figure 11 Style DF-LB Box Pad

36” x 52”(Document 064309)

Front

24”

34”

34”

20”

21” 21”42”

36”

24”

24”

36”

52”

F = FixedR = Removable

24”

34”

34”

20”

21”42”

R R

FF

F

F

F

F

FF

24”

21”




Rev. #21: 07-31-15 051122 Page 13 of 28

13. Preferred Barrier Post Arrangement for Transformers (continued)

Figure 12 Style DF-LB Box Pad

50” x 52”(Document 064309)

Front

36”

24”

34”

34”

20”

28”42”28”

24”

24”

50”

52” 24”


24”

34”

34”

20”

28”42”28”

F

F

F

F

F

FF

F

R R




Rev. #21: 07-31-15051122 Page 14 of 28


Figure 13 Style IIE-LB Pad

80” x 61”(Document 045292)

Front

80”

61”

36”

40”

15”


F

24” 24”

40”

26”

24” 40” 40” 24”

40”

26”

40”

15”24”

24” 40” 40” 24”

F F

F

FF

F F

R R R

F




Rev. #21: 07-31-15 051122 Page 15 of 28


Figure 14 Style IIE-LB Pad

90” x 106”(Document 045292)

Front

106”

90”

36”


F

R

FFF

F

F

F

F

F

FF

RR

16”

42”

42”

27” 42” 42” 27”

16”

42”

42”

24”

24”

42” 42”

24”

42” 27”

24” 24”

42”27”




Rev. #21: 07-31-15051122 Page 16 of 28

14. Barrier Posts for Capacitors

Figure 15 Pad-Mount Capacitor

82” x 72”(Document 066197)

Front

23” 42” 42” 23”

30”

42”

72”

82”

24”

36”

24”

42”

30”

23”42”42”23”

36”

30”

42”

42”

30”


F

R R R

F

F

R R R

F

F

F




Rev. #21: 07-31-15 051122 Page 17 of 28

15. Barrier Posts for J-Boxes

Figure 16 1-Wire, Pad-Mounted Junction

48” x 36”(Document 066212)

RRF

F

F

F

F

F

FF

36”

48”

24”

24” 24”

40”

40”

8”

8”

40”

40”

8”

27” 42” 27”

27”42”27”

8”

36”

Front





Rev. #21: 07-31-15051122 Page 18 of 28

15. Barrier Posts for J-Boxes (continued)

Figure 17 2- or 3-Wire Pad-Mounted Junction

72” x 36”(Document 066212)

Front

24”

40” 40” 40”

41”

41”41”

41”

15”

24” 24”

36”

72”

36”

15”

39”42”39”

F F F F

FF

RR

FF





Rev. #21: 07-31-15 051122 Page 19 of 28

16. Barrier Posts for PMH Switch

Figure 18 PMH Switchgear40-7/8” x 41-1/2”

(Document 053318)

Front

42” 23-7/16”

14-3/4”

42”

24”24”

14-3/4”

42”

41-1/2”

42”

14-3/4”

23-7/16”42”23-7/16”

14-3/4”

42”

36”

36”

F

F

F

F

F

RR

F

RR

23-7/16”

40-7/8”



UG-1: GeneralGreenboo