Standard Plan 2 - 3000A 480Y-277V - Final

Oct 29, 2026

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Engineering notes and specifications governing customer and LADWP coordination for an electrical service installation. Requirements cover scheduling contact with the electrical service representative, arranging LADBS electrical inspection, conduit construction and encasement in concrete, reinforcing bars in the concrete envelope, mandreling with LADWP-provided mandrel, and installing new fiber multi-duct pulling tape without cuts or splices. Additional provisions specify transformer and switch-pad layout, clearances for access and egress, barrier posts and staging areas for highway loading, grounding and supplemental grounding plane requirements, fire barrier, permitting thresholds, and responsibilities for customer-installed materials and future maintenance.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages1

Reading Time3 min

AccessFree to download

Construction and inspection coordination

LADWP/LADBS requirements and approvals

Conduit, encasement, and pulling tape specifications

Conduit mandreling and reinforcement

Pulling tape printing and installation rules

Pads, clearances, and site protection

Switch pad and transformer pad layout constraints

Staging area, access paths, and barriers

Grounding, fire barrier, and permitting

Grounding plane and supplemental requirements

Permits and protective structures

| NOTES:
1. THE DEVELOPER SHALL CONTACT THE DEPARTMENT'S ELECTRICAL SERVICE REPRESENTATIVE (ESR)FIVE
NORMAL WORKING DAYS PRIOR TO START OF CONSTRUCTION.
2.
THE CUSTOMER SHALL ARRANGE FOR ELECTRICAL INSPECTION BY LADBS FOR THEIR ELETRICAL WORK.
THE SERVICE WILL NOT BE ENERGIZED UNTIL NOTIFICATION OF APPROVAL HAS BEEN RECIEVED BY THE
LADWP.
CUSTOMER_TO CONSTRUCT 2-6”P &1-5”P NEW_CONDUIT ENCASEDIN 3”OF CONCRETE FROM_THE SWITCH
3.
PAD_TO PROPERTY LINE AS SHOWN.WHEN THE PRIMARY CONDUITS_ARE.INSTALLED ON FILLED GROUND,
FOUR \#4 REINFORCING BARS SHALL BE INSTALLED IN THE CONCRETE ENVELOPE.
STREET (ALLEY NOT ACCEPTABLE)
4.
CONDUIT SHALL BE_MANDRELLED WITH A MANDREL PROVIDED BY_THE LADWP.INSTALL A FLAT,WOVEN
MULTI-FIBER POLYESTER RIBBON,MINIMUM 3/8-INCH NOMINAL WIDTH AND /250 POUND MINIMUM TENSILE
STRENGTH PULLING TAPE IN ALL DUCTS.THE PULLING TAPE SHALL BE PRINTED WITH THE RATED
TENSILE_STRENGTH AND SEQUENTIAL F0OTAGE MARKINGS WITH LEGIBLE AND STABLE PRINT.THE TAPE
NEW 7x1/'SWITCH PAD
SHALL BEIN ONE CONTINUOUS LENGTH_THROUGH EACH_DUCT_WITH_NO CUTS,SPLICES OR TIES ALLOWED.
PER LADWP UGCS UB721-14,G-1,
CUSTOMER TO INSTALL PRECAST CABLE TRENCH AND TRANSITION BOX_TO THE 3000A PULL SECTION.
NEW 9′x12'TRANSFORMER PAD
AS LAST REVISED&P72/W/
56
TRUCK ACCESS_AND_STAGING AREA MUST BE RATED AT HIGHWAY LOADING AND HAVE A 100'MINIMUM
PER LADWP_UGCS UB721-19,
BARRIER POSTS
VERTICAL CLEARANCE.
G-1,AS LAST REVISED &P721
7.
THE AREA ABOVE AND BELOW THE SWITCH _PAD AND_TRANSFORMER PAD.INCLUDING_3 FEET AROUND
JOIN POINT
W/BARRIER POSTS
THE PADS,SHALL BE CLEAR OF ANYTHING FOREIGN TO DEPARTMENT FACILITIES.SEE UGCS P721 FOR
(VERIFY DEPTH OF INCOMING CONDUIT)-
ADDITIONAL INFORMATION.
IF INSTALLING METALLIC OBJECTS IN PROXIMITY TO THE SWITCH PAD AND TRANSFORMER PAD.1.E.CHAIN
8.
NEW_2-6'P_&1-5"P EB(6′)-
LINK_FENCE OR IRON GATE,REFER TO UGCS UB721-12 FOR FENCE GROUNDING AND UB980-09 FOR ROLLING
POUR IN PLACE SLAB
GATE GROUNDING REQUIREMENTS.
(30”MIN DEPTH FROM FIN/SHED GRADE)
(BY CUSTOMER)
9.
MINIMUM 10-F0OT RADIAL CLEARANCE AROUND THE SWITCH PAD AND TRANSFORMER_PAD_IS REQUIRED FOR
ALL A/R INTAKES,EXHAUST VENTS,DOORS,WINDOWS,FIRE ESCAPES,AND EGRESS PATHS.
3′MIN
CURB
10.
INSTALL BARRIER POSTS PER UGCS P72/AND AS REQUIRED BY THE DWP ESR.
THE DEPARTMENT OF BUILDING AND SAFETY REQUIRES A BUILDING PERMIT FOR STRUCTURES EXCEEDING
|1.
48 INCHES IN DEPTH,INSTALLED_IN PRVATE_PROPERTY.
12.
ANYIRRIGATION SYSTEM NSTALLED AROUND THE SWITCH PAD AND TRANSFORMER PAD MUST SPRAY AWAY
FROM THE PADS.
NEW_3000A
13. ANY MATERIALS OR EQUIPMENT THAT YoU INSTALLON YOUR PROPERTY-SUCH AS HANDHOLES.MAINTENANCE
FREESTANDING
HOLES,VAULTS,TRANSFORMER PADS,OR CONDUITS-AT YOUR OWN COST WILL BE USED BY LADWP TO
WEATHERPROOF PULL
PROVIDE_SERVICE.THESE ITEMS WILL REMAIN YOUR PROPERTY AND MUST BE MAINTAINED,REPA/RED,
DRIVEWAY ACCESS
SECTION/SWITCHBOARD
REPLACED,OR UPGRADED BY YOU,AT YOUR EXPENSE,WHENEVER LADWP DETERMINES IT IS NEEDED.
3、MAx
EQUIPMENT INSTALLED BY LADWP,SUCH AS TRANSFORMERS AND CABLES,WILL REMAIN LADWP PROPERTY
480Y/277V,3φ-4W
AND WILL BE MAINTAINED BY LADWP.
Isc=55,000A
REFER TO UB721-19,SHEET 3.SECTION 8 FOR GROUNDING REQUIREMENTS.FOR SEPARATELY DERIVED
14.
SUPPLEMENTAL GROUNDING PLANE REQUIREMENTS.REFER TO UB721-17.ALTERNATIVE DESIGNS,STAMPED
NEW PRECAST CABLE
AND_APPROVED_BY A LICENSED ENGINEER,WILL BE GVEN PRELIMINARY APPROVAL PENDING FINAL_APPROVAL
TRANSITION BOX(6′x8')
BASED ON ACCEPTABLE RES/STANCE MEASUREMENTS OF 5 OHMS OR LESS TAKEN BY DWP TEST LAB.
15.
PROVIDE ONE WALL MOUNTED FIRE BARRIER IN ACCORDANCE WITH LADWP UGCS UB721-27,UB72/-28,OR
PER UGCS UB721-24,AS
UB721-43

FAQs

What must be done before starting construction and how are inspections handled?

Contact the electrical service representative at least five normal working days before starting construction. Arrange for electrical inspection by LADBS for the electrical work, and the service is not energized until approval notification is received by LADWP.

What are the conduit and pulling tape requirements for the ducts?

Conduits must be mandreled using a mandrel provided by LADWP. Install a flat woven multi-fiber polyester pulling tape with minimum width and tensile strength in all ducts, and the tape must be continuous through each duct with no cuts, splices, or ties.

What site constraints and clearances apply around the switch pad and transformer pad?

Provide minimum radial clearance around the switch pad and transformer pad for A/R intakes, exhaust vents, doors, windows, fire escapes, and egress paths. Maintain a level, unobstructed working space in front of the entire pull section and ensure areas above and below the pads are clear of foreign items.

Oct 29, 2026

Upload by Bintang