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    cardomb's Avatar
    cardomb Posts: 11, Reputation: 1
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    #1

    Mar 5, 2007, 07:17 PM
    100 amp sub panel wire size
    I now have the 100 amp breaker installed in my load panel. I will run wiring from the load panel to a 100 amp sub-panel in an unground 80 schedule PVC. I believe I need to use #2 wire for the hots and the neutral. If this is correct, then what size ground do I use? Number 6? The sub- panel will be 50 feet from the main load panel.
    BWF's Avatar
    BWF Posts: 6, Reputation: 1
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    #2

    Mar 5, 2007, 07:28 PM
    Quote Originally Posted by cardomb
    I now have the 100 amp breaker installed in my load panel. I will run wiring from the load panel to a 100 amp sub-panel in an unground 80 schedule PVC. I believe I need to use #2 wire for the the hots and the neutral. If this is correct, then what size ground do I use? Number 6? The sub- panel will be 50 feet from the main load panel.
    A 100 main circuit breaker gets #4 wire (NEC), Codes are set by the AHJ authority having jurisdiction.
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #3

    Mar 6, 2007, 06:42 AM
    Just to be clear, minimum size wire for a residential feeder is #4 Copper wire, or # 2 Aluminum wire, for hts and neutral.

    The equipment ground can be #8 Copper or #6 Aluminum.

    The distance is minimal, so voltage drop will not be an issue with either wire.
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