BASE AND DUCTING DETAILS FOR 75 TO 500 kVA TRANSFORMERS
200
900
1630
200
200
900
900
2,3,12 (TYP.)
1
DUCTS ARE TO BE
INSTALLED DIRECTLY
BELOW THE WINDOW
1780
IN THE BASE
1420
A
1
A
3
900
6
300 MIN
MAXIMUM 4 CONDUCTORS
1990
PER PIPE, DUCTS MUST
BE COMPLETELY VISIBLE
200
AND ACCESSIBLE THROUGH
WINDOW (SEE DETAIL A)
SEE GUARD RAIL
B
CONSTRUCTION
2,4,12 (TYP.)
PRIMARY SIDE
SECONDARY SIDE
OF TRANSFORMER
OF TRANSFORMER
915
355
DRAWING
114
3
LEFT FRONT
114
TOP VIEW
241
1143
A
358
178
241
SCALE: N.T.S.
421
WINDOW DETAIL
SCALE: N.T.S.
NOTES:
1. WHEN SETTING BASE, OBSERVE 250 mm MINIMUM AND 300 mm MAXIMUM REQUIREMENT FOR ELEVATION FROM TOP OF
BASE TO FINISHED GRADE (NOT ROUGH GRADE).
2. INSTALL GUARD RAIL 200 mm OUTSIDE OF GROUND GRID. GUARD RAIL SHALL BE FRONT REMOVABLE.
3. ENSURE 5.0 m OF 4/0 Cu IS COILED IN BASE FOR EACH GRADIENT CONTROL CONNECTION TO GROUND BUS.
4. TRANSFORMERS INSTALLED ON PRIVATE PROPERTY SHALL REQUIRE A GUARDRAIL.
5. ANY CONTRACTOR SUPPLIED BASES SHOULD BE CONSISTENT WITH EPCOR SPECIFICATION.
6. 75 TO 500 kVA TRANSFORMERS CAN ACCOMODATE MAXIMUM 6 CONDUCTORS PER PHASE.
7. ALL CABLES TO HAVE A MINIMUM OF 5 m OF EXTRA LENGTH COILED IN BASE AS MEASURED FROM TOP OF PIPE OR
AT CABLE ENTRY POINT.
20170126 15:11 rlawrie
ALL DIMENSIONS IN MILLIMETERS (INCHES) UNLESS OTHERWISE SPECIFIED.
INSTALLATION OF PRECAST CONCRETE
BASE FOR THREE PHASE TRANSFORMERS
CUSTOMER CONNECTI
ON
GUI
DE
DATE REVISED:
2016-12 -07
REFERENCE NO.
DRAWING NO.:
009
PAGE NO.
65 CC 07 00 27 133
1
4
BASE AND DUCTING DETAILS FOR 750 TO 2500 kVA TRANSFORMERS
200
900
1900
200
200
900
2,3,12 (TYP.)
900
1
DUCTS ARE TO BE
INSTALLED DIRECTLY
BELOW THE WINDOW
2060
1700
IN THE BASE
B
2
A
3
900
6
MAXIMUM 4 CONDUCTORS
300 MIN
PER PIPE, DUCTS MUST
2260
BE COMPLETELY VISIBLE
AND ACCESSIBLE THROUGH
3
CONSTRUCTION
LEFT FRONT
2,4,12 (TYP.)
DRAWING
PRIMARY SIDE
SECONDARY SIDE
OF TRANSFORMER
OF TRANSFORMER
964
382
SEE GUARD RAIL
102 (TYP.)
200
WINDOW (SEE DETAIL B)
B
102 (TYP.)
TOP VIEW
152
178
SCALE: N.T.S.
1168
B
332
368
548
WINDOW DETAIL
SCALE: N.T.S.
NOTES:
1. WHEN SETTING BASE, OBSERVE 250 mm MINIMUM AND 300 mm MAXIMUM REQUIREMENT FOR ELEVATION FROM TOP OF
BASE TO FINISHED GRADE (NOT ROUGH GRADE).
2. INSTALL GUARD RAIL 200 mm OUTSIDE OF GROUND GRID. GUARD RAIL SHALL BE FRONT REMOVABLE.
3. ENSURE 5.0 m OF 4/0 Cu IS COILED IN BASE FOR EACH GRADIENT CONTROL CONNECTION TO GROUND BUS.
4. TRANSFORMERS INSTALLED ON PRIVATE PROPERTY SHALL REQUIRE A GUARDRAIL.
5. ANY CONTRACTOR SUPPLIED BASES SHOULD BE CONSISTENT WITH EPCOR SPECIFICATION.
6. 750 TO 1000 kVA TRANSFORMERS CAN ACCOMODATE MAXIMUM 6 CONDUCTORS PER PHASE AND 1500 TO 2500 kVA
TRANSFORMERS CAN ACCOMODATE MAXIMUM 8 CONDUCTORS PER PHASE.
7. ALL CABLES TO HAVE A MINIMUM OF 5 m OF EXTRA LENGTH COILED IN BASE AS MEASURED FROM TOP OF PIPE OR
AT CABLE ENTRY POINT.
20170126 15:14 rlawrie
ALL DIMENSIONS IN MILLIMETERS (INCHES) UNLESS OTHERWISE SPECIFIED.
INSTALLATION OF PRECAST CONCRETE
BASE FOR THREE PHASE TRANSFORMERS
CUSTOMER CONNECTI
ON
GUI
DE
DATE REVISED:
2016-12 -07
REFERENCE NO.
DRAWING NO.:
009
PAGE NO.
65 CC 07 00 27 133
2
4
BASE AND DUCTING DETAILS FOR 75 TO 500 kVA AND 750-2500 kVA TRANSFORMERS
TEMPORARY DUCTS TO
300
MIN 1100
MAX 1500
(3%-10% SLOPE)
300 MAX.
CONDUCTORS
FINISHED GRADE
250 MIN.
GRADIENT CONTROL
203
3
(8")
ENSURE PROPER ALIGNMENT
C
11 (TYP.)
SECONDARY DUCTS
8 (TYP.)
SEE NOTE 1
7 (TYP.)
DO NOT PUT PRIMARY OR SECONDARY
SEE NOTE 2
DUCTS THROUGH "KNOCK-OUTS"
SECTION
A
SCALE: N.T.S.
TEMPORARY DUCT
6 (2 X 5.0 m
USED TO ASSURE
COILED IN BASE)
PROPER ALIGNMENT
CORNER
POST
3%-10% SLOPE
C
DETAIL
250 MIN
300 MAX
300
300
MIN
MIN 1100
MAX 1500
SCALE: N.T.S.
5
10
B
SECTION
SCALE: N.T.S.
NOTES:
1. ADAPTER COUPLING IS REQUIRED FOR DB2 CONDUIT.
2. 36" RADIUS BENDS ARE PREFERRED FOR ALL DUCT BENDS.
20170126 15:13 rlawrie
ALL DIMENSIONS IN MILLIMETERS (INCHES) UNLESS OTHERWISE SPECIFIED.
INSTALLATION OF PRECAST CONCRETE
BASE FOR THREE PHASE TRANSFORMERS
CUSTOMER CONNECTI
ON
GUI
DE
DATE REVISED:
2016-12 -07
REFERENCE NO.
DRAWING NO.:
009
PAGE NO.
65 CC 07 00 27 133
3
4
ITEM
1
STOCK No.
PART DESCRIPTION
AS REQ'D
BASE PRECAST TRANSFORMER
75 - 500 kVA CONCRETE
11794
750 - 2500 kVA CONCRETE
11636
1
2
ROD GROUNDING 5/8" x 5'
17288
8
3
CONNECTOR GROUND ROD
9136
2
4
CONNECTOR GROUND
31914
2
5
SAND
6
WIRE #4/0 STRANDED COPPER BARE
7
BEND PVC RIGID
3/4" - 250 DOUBLE WIRE
3/4" ROD - 250 1/C
AS REQ'D
A/R
44327
22960
17787
AS REQ'D
PIPE DUCT
DB2 - 4"
53283
DB2 - 6"
42236
RIGID PVC - 4"
10083
A/R
10692
AS REQ'D
COUPLINGS
4" DB2 - 4" PVC/FRE
38916
4" PVC
26695
6" DB2 - 6" PVC/FRE
10284
6" PVC
34751
10
ROAD CRUSH - 3/4"
11
BELL END COLLAR
12
A/R
36m
4" 90 DEGREE 36" RADIUS PLAIN ENDS
RIGID PVC - 6"
9
N/A
45655
4" 90 DEGREE 24" RADIUS PLAIN ENDS
6" 90 DEGREE 36" RADIUS PLAIN ENDS
8
20170126 15:15 rlawrie
QTY.
A/R
N/A
A/R
AS REQ'D
A/R
RIGID PVC - 4"
20574
RIGID PVC - 5"
20731
COUPLER - GROUND ROD
17289
4
INSTALLATION OF PRECAST CONCRETE
BASE FOR THREE PHASE TRANSFORMERS
CUSTOMER CONNECTI
ON
GUI
DE
DATE REVISED:
2016-12 -07
REFERENCE NO.
DRAWING NO.:
009
PAGE NO.
65 CC 07 00 27 133
4
4