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    lvania's Avatar
    lvania Posts: 2, Reputation: 1
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    #1

    Oct 22, 2009, 01:12 PM
    Minimum rigid conduit size
    What is the minimum conduit size for 3 -#2 copper wires to a service panel?
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    Oct 22, 2009, 01:26 PM
    Always needs to know the insulation, as different types have different outside dimensions.

    Assuming THHN/THWN insulation, 1 inch is the minimum.

    Electricians never use 1 in GRC for 3 #2 wires. We will always use a min of 1-1/4".

    Just the way we are.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #3

    Oct 22, 2009, 01:47 PM

    Might you need 4 wires. L1, L2, G and N?
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