An underground electrical ductbank features PVC conduits encased in red-dyed 3000 PSI concrete with minimum 3-inch clearances on all sides. Plastic conduit spacers are positioned at five feet on center to maintain alignment, and pull ropes are included within the ducts. A warning tape is buried six inches below grade with a minimum cover of thirty-six inches to the top of pavement subgrade or grade, and select backfill is compacted to the trench walls.
3" 36" MIN 3" WARNING TAPE, 6" BELOW GRADE PVC CONDUIT SIZE AS INDICATED 3" 3" 3" GREENLEE MULTIPLEX POLYESTER ROPE OR EQUIVALENT SELECT BACKFILL 3000 PSI CONCRETE, RED-DYED TOP OF PAVEMENT SUBGRADE OR GRADE NOTES: 1. USE PLASTIC CONDUIT SPACERS AT 5'-0" OC. ELECTRICAL CONDUCTORS SHALL BE LOCATED IN DUCTS AS SHOWN. CONDUCTOR SIZE AS INDICATED.
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