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Wire in Conduit on a Roof

Discussion in 'Electrical Codes' started by jar546, Nov 9, 2018 at 10:56 PM.

  1. jar546

    jar546 *****istrator

    Oct 16, 2009
    Likes Received:
    Riddle me this:

    You have 3 WR GFCI duplex receptacles on a single 20A circuit that serves mechanical equipment on a roof.

    The conduit is on stands approximately 8" above the roofline. The area has a design temp of 91F as verified by the 2% ASHRAE design temp for June-July & August.

    What size wire would be code compliant for this installation based on NEC 310.15(B)(3)(c)? No other factors such as conduit fill is applicable for this. Enjoy!


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