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  1. cpoole

    NEC 314.71 Manhole dimension requirements

    Have a UG ductbank with 28 each 6 inch conduits entering a manhole with 84 each 15 kV volt single conductors (3 cables per conduit) with 1.7 inch overall diameter of each single cable. Need manhole dimensions required to meet requirements per NEC 314.71; 1) For a straight pull manhole 2) For...

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