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TRANSFORMER SECONDARY CONDUCTOR SCHEDULE
XFMR FLEXIBLE PHASE NEUTRAL ISOLATED EQUIPMENT SYSiEM GROUNDMG
RATWG CONDUIT GROUND GROUNDMG ELECTRODE k SY4EM
SIZE BON�ING JUMPEk
u U AL
30 KVA 1 1/4" //3 CU jj3 CU k8 CU k8 CU k8 CU
as Kvq i i/z" pi/o cu qi/o cu qe cu qs cu qe cu
75 KVA 2" $3/0 CU $3/0 W //fi CU //6 CU //4 CU
112.SKVA 3" (�SOOMCM �y500MCM //3 CU //3 CU //1/0 CU
30 KVA � ��p" k3 CU iji/0 CU //8 CU //8 CU //8 CU
45 KVA 2" #1/0 CU j/4/0 W H6 CU H6 CU �/6 CU
75 KVA 2 1/2" #3/0 CU �3�OMCM CU N6 CU N6 CU �4 CU
112.5KVA 3 1/2" {/SOOMCM PARALLEL 3 CU H3 CU H1/0 CU
SOOMCM H
MAIN SERVICE
EQUIPMENT
rlA N B C
I I �
I I
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G
I I
SERVICE
CONDUITS I I
J
FEE�ER CON�UIT
=1
NEUTRAL
(RUN ro
PHASE
30 TRANSFORMER, DELTA TO WYE CONDUCTO
HI BONDMG
JUMPER
H3 EOUIP. BOND
HZ xt x2 X x3 TO CASE
FL
svsTEU cROUNOiNc
ELECTRODE CONDUCTOR
(RUN TO STRUCT. STEEL)
PANELBOARD CONNECTION DETAIL
NO SCALE
FULL SRE
PER 250.66
208Y/120V. 30, 4W.
PANELBOARD WITH
MAIN BREAKER
STANDARD GROUND BUS
OPTIONAL ISOL4TED
GROUN� BUS
ISOLATED (AND WSULATED)
GROUNDWG CONDUCTOR
(RUN TO XO TERMINAL�
EQUIPMENT BOND TO
STANDARD GROUND BUS
EOUIP. BONDING CONDUCTOR
(RUN W FLEX. CONDUIT),
ATTACH TO BUSHING
AT EACH END.
INSULATED BUSHING WITH
GROUND LUG. TYPICAL
AT BOTH ENDS.
METAL CONDUIT
NOTES:
lO BOND EACH SERVICE ENTRANCE CONDUIT WITH JUMPER SIZED BY TABLE
250.66, PVC IS NOT REQUBED TO BE BON�E�
O BOND LOAD SIDE CONDUIT BY 250.96 & 250.97 NO SPECIAL PROCEDURE
REQUIRED.
O3 INSTALL MAIN BONDING JUMPER AS REQUIRE� BY NEC 25028
4O SIZE GROUN�ING ELECTRODE CONDUCTOR BY TABLE 250.66
OS BOND GROUNDING ELECTRODE RACEWAY OR CHASE NIPPLE AS REQUIRED BY
N.E.C. 250.92
O6 GROUNDING ELECTRODE SYSTEM SHALL BE MADE UP AS REQUIRED BY
N.E.C. 250.50 & 52
� NO CLAMP MODIFICATIONS SHALL BE ALLOWED--NEC 250.70
O8 CONDUCTOR TO GROUND ROD REQUIRED TO BE NO LARGER THAN ,y6 CU
(CAN BE SOLID) N.E.C. 250.66, 310.3 - CAN GO DIRECTLY TO GROUND BAR,
WATER PIPE OR BUIL�ING STEEL.
O9 GROUND ROD SHALL COMPLY WRH N.E.C. 250.52 (C,3� & 250.10
10 CONDUCTOR TO CONCRETE ENCASED ELECTRODE (WHERE AVAILABLEJ REQUIRED
TO BE NO LARGER THAN H4 CU REFER TO N.E.C. 250.50(C) AND 250.66(B)
GROUNDS CAN TERNINATE ON THE SANE OR DIFFERENT PIECES OF BUILDING
STEEL BASE �EQSION ON LOCATIONS OF ELECTRICAL SERVICE AND WAiER
SERVICE. (BON� ACROSS STRUCTURAL EXPANSION JOINTS IF REQUIRE�.)
BUILDING STEEL ^ WqiER PIPE
FULL SIZE -
PER 250.66
MAIN SERVICE GROUNDING DETAIL
NOT TO SCALE
CONCREiE ENCASE� ELECTRODE
GROUND ROD
EXOTHERMIC WELD
OR BOLT-TYPE
CONNECTION
BUILDING FOOTING
XFMR LOCATED ON RESTROOM MEZZ
OR SUSPEND FROM STRUCTURE ABOVE.
n,iaiana��i�
CONVERT TO FLEX FOR
XFMR CONNECTION. (TYP.)
�
45 KVA
4—/�1/0 THHN CU �
1—//6 CU GRD
IN Y' EMT p �
150A 400A
MB MB
�a8„�o� 480,�»
3ro. 4W 34. 4W
1/0 CU TO BUILDING STEEL,
WATER PIPE, AND FOOTING REBAR.
#6 CU GRD TO GROUND ROD.
3—q6 THHN CU
1—#10 CU GRD
IN 1" EMT
PANEL SCHEDULE
PANEL DESIGNATION: 7 MOUNTING: SURFaCE
VOLTAGE m W: i2o 2oav 3m aw TOP OR BOTTOM FEED�. TaP
MAIN AMPACITY LUG SIZE lsoa MB 7saA1cM aL Wcs BRANCH CIRCUITS: a2
OPTIONS�. ❑ FEED—THRU WGS ❑ ISO GROUND BUS %❑ SN GROUND BUS 0 CU BUS ❑ 173% NEUiRAL
0 HANDLE TIES (FOR MULTI—WIRE BRANCH CKTS) ❑ SUB FEED C.B- SIZE
CNT. DESCRIPTION WATfS TRIP PH. CKT. DESCRIPTION WATfS TRIP
1 A 2 20/1
3 B 4 2o/i
5 C 6 Zo/�
7 A 8 zo/i
9 B 10 2o/i
11 C 12 zo/i
13 A 14 Zo/�
15 B 16 �o/�
17 C 18 �o/�
19 A 20 20/1
21 B 22 20/1
23 C 24 20/1
25 A 26 20/1
27 B 28 20/1
29 C 30 20/1
31 A 32 20/1
33 B 34 20/1
35 C 36 20/1
37 A 38 20/1
39 B 40 20/1
41 C 42
EXTERIOR
WALL
400A
METER CABINET
BY UTILITY CO
AT THE XFMR
T
4—#750MCM XHHW AL ALLOY
IN 4' PVC BY E.C.
UTILITY C0. PAD MOUNT XFMR
FURNISHED & INSTALLED BY
THE UTILITY C0.
CONCRETE XFMR PAD
BY E.C.
r��e�4�
PANEL SCHEDULE
PANEL DESIGNATION: � MOUNTING suRVpce
vOLTAGE 0 w: aso znv ae aw TOP OR BOTTOM FEED: eorrou
MAIN AMPACITY LUG SIZE aoan �ne �sauc�n a� wcs BRANCH CIRCUITS: az
OPiIONS: ❑ FEED—THRU WGS ❑ ISO GROUND BUS X❑ SiD GROUND BUS %❑ CU BUS ❑ 173% NEUTRAL
❑ HANDLE TIES (FOR MULTI—WIRE BRANCH CKTS) ❑ SUB FEED C-B. SIZE
CKT. DESCRIPTION WATfS TRIP PH. CKL DESCRIPTION WATfS TRIP
1 A 2 20/I
3 B 4 zo/�
5 C 6 zo/�
7 A 8 2o/i
9 B 10 2o/i
11 C 12 2o/i
13 A 14 2o/i
15 B 16 2o/i
t7 c t8 zo/i
19 A 20 20/i
21 B 22 20/i
23 C 24 20/i
25 A 26 20�1
27 B 28 20/i
29 C 30 20/i
31 A 32 20/i
33 B 34 20/i
35 C 36 20/i
37 A 38 20/i
39 B 40 20/i
41 C 42
DETAILS AND SCHEDULES
No s�A�E
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ISSUE/NEVISIONS
STATE SUBMITTAL 5-24-2013
DWG UPDATES 2-11-2014
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