E-505_Elec_Manhole_Details_Rev-1_10Aug2017_-_Copy.pdf

E-505

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PRECAST ELECTRICAL MANHOLE

36"X36" DOOR HINGE SIDE

(FRAME BONDED TO WIRE

MESH IN TWO PLACES)

BONDING INSERT,

INTERNAL, 2 SIDES

(MARKED "BOND" IN GREEN)

ELECTRICAL MANHOLE COVER AT GINKGO SUBSTATION

SCALE: N.T.S.

SCALE: N.T.S.

8'-8

13'-8'

36"

32"

NOTES:

1. PROVIDE 4/0 BARE COPPER GROUND LOOP AROUND

VOLTAGE REGULATORS, GAS SWITCHES, AND PAD

MOUNTED TRANSFORMERS. CONNECT DUCTBANK

GROUND CONDUCTORS TO GROUND LOOP. BOND

REBAR TO GROUND LOOP

2. BOND VOLTAGE REGULATOR GROUND LOOP TO

GINGKO SUBSTATION GROUND GRID. BOND BYPASS

SWITCH STRUCTURE TO GROUND LOOP.

3. PROVIDE (4) GROUND RODS AND 4/0 COPPER

GROUNDING CABLES (INSULATED AND BARE) FOR

SEPARATE GROUNDED NEUTRAL.

4. ALL BELOW-GRADE GROUNDING CONNECTIONS

SHALL BE EXOTHERMICALLY WELDED.

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20' 20' 20' 20'

4/0 BARE COPPER

GROUND LOOP

4/0 BARE COPPER TO

TANK GROUND (TYP 2) SEE NOTE 2

3/4" x 10' GROUND

RODS (TYP 4)

EQUIPMENT PAD

OR VAULT

4/0 COPPER CABLE WITH

600 V GREEN INSULATION

FOR PAD MOUNTED

TRANSFORMERS ONLY

(SEE NOTE 3)

4/0 BARE CU 4/0 BARE CU 4/0 BARE CU

SEE NOTE 2

3/4" x 10' GROUND

RODS (TYP 4)

TYPICAL ELECTRICAL EQUIPMENT GROUNDING

SCALE: N.T.S.

COORDINATE POINT

CENTER OF MANHOLE

COORDINATE POINT

CENTER OF MANHOLE

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Amendment 0004

AMENDMENT 0004

Manning, S (man67358) Snapshot

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Text Box NOTE: MH04 AT GINGKO SUBSTATION SHALL CONSIST OF A PRECAST VAULT MATCHING THE HEIGHT AND CHARACTERISTICS OF THE '810' VAULT DEPICTED BY DETAIL No. 1 (PRECAST ELECTRICAL MANHOLE) LOCATED ON THIS SHEET WITH LONG DIMENSION MATCHING THE MANHOLE COVER DEPICTED ABOVE (8'-8" X 13'-8" OR NEXT LARGER MANUFACTURER'S SIZE) WITH COVER OPENING SIZES AS INDICATED.

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Text Box Rev-1; MH04 Size Requirements 10Aug2017 mjk