An underground electrical ductbank features a concrete encasement measuring one foot nine inches wide by one foot five and one-half inches high. The arrangement accommodates two five-inch conduits for four-point-sixteen kilovolt generator feeders and spares, two two-inch conduits for four-hundred-eighty-volt auxiliary power, two two-inch conduits for neutral grounding resistor current transformer wiring, and two two-inch conduits for controls and communication. Edge clearances measure four inches typical with varying internal spacing dimensions.
4" (TYP) 1' - 9" 1' - 5 1/2" LEGEND: G = 5" 4.16kV GENERATOR FEEDER P = 2" 480V AUXILIARY POWER CT = 2" NGR CT WIRING C = 2" CONTROLS/COMMUNICATION S = 5" SPARE G S P P 3 1/2" 3" C C CT CT 3"
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