UNDERGROUND SERVICE
INSTALLATION
750 & 1000 KVA
THREE PHASE TRANSFORMER
CONCRETE PAD SPECIFICATIONS
Firelands Electric Cooperative, Inc.
104”
3-PHASE PAD MOUNTED TRANSFORMER
CONCRETE PAD
48”
30”
18”
100”
TRANSFORMER
15.5”
3-PHASE PAD MOUNT
TRANSFORMER
PRIMARY
SECONDARY
10”
(FIRELANDS)
CONCRETE PAD MUST BE MINIMUM OF 8’ THICK
DANGER
SERVICE
CONDUCTORS TO
INSIDE PANEL
GROUND WIRE
42”
MINIMUM
(MEMBER)
24”
MINIMUM
(MEMBER)
36” RADIUS PVC
“SWEEP L”
(FIRELANDS)
PRIMARY PVC CONDUIT FROM UTILITY
POLE TO TRANSFORMER IS INSTALLED
BY MEMBER.
18” RADIUS PVC
“SWEEP L”
36” RADIUS PVC
(FIRELANDS)
“SWEEP L”
STRUCTURE/
PANEL BOARD
(MEMBER)
(FIRELANDS)
(MEMBER)
PRIMARY CABLE FROM UTILITY POLE
TO TRANSFORMER IS MAINTAINED BY
FIRELANDS ELECTRIC CO-OP.
(FIRELANDS)
Revised 8/10/15 ~ALG
UNDERGROUND SERVICE INSTALLATION
3-PHASE PAD MOUNTED TRANSFORMER
NOTES:
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Primary cable conduit must be a minimum of 42-inches below the final ground level.
Secondary cable conduit must be a minimum of 24-inches below the final ground level, and
conduit must be a minimum of 4-inches, based on the job location.
Load terminals of meter base are rated for 60C, of 75C conductor.
The transformer pad must be level and meet Firelands’ transformer concrete pad
specifications. The transformer concrete pad area is approximately 100-inches by 104-inches.
Contact your cooperative for complete installation procedures.
Member is responsible for opening and then filling the trenches, installing all PVC conduit, and
preparing the sites for transformer pad. The cooperative will install the primary cables up to
the transformer, and member will install al secondary cables.
OWNERSHIP OF INSTALLED FACILITIES:
(a) The cooperative maintains all primary cable from the utility pole to the transformer unit.
(b) Member owns and maintains all materials beyond the transformer.
(c) The cooperative maintains all ownership of electrical meters.
MATERIALS:
 Materials are based on job location.
 Conduit size will be determined by the cooperative, based on size of cable and length of run.
 Member needs to notify the cooperative as to the type and size of wire used on the secondary
side of installation.
 Please contact Firelands Electric Cooperative for complete installation procedures and material
guidelines at 1-800-533-8658, or send e-mail to operations@firelandsec.com.
Revised 8/10/15 ~ALG