An underground electrical ductbank is encased in concrete with overall dimensions of three feet one inch wide by one foot one and one-half inches high. The bank contains four larger five-inch conduits—two spare conduits flanking two primary twelve-kilovolt feeders—plus two smaller three-quarter-inch conduits for meter wiring. Clearances include three-inch typical spacing between conduits and three and one-half inches of concrete cover from the outer edges.
3 1/2" 3" (TYP) 3" (TYP) 3' - 1" 1' - 1 1/2" LEGEND: P = 5" 12.47kV PRIMARY FEEDER M = 3/4" METER WIRING S = 5" SPARE S P P S M M
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