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    davheb's Avatar
    davheb Posts: 3, Reputation: 1
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    #1

    May 7, 2012, 01:35 PM
    Electrical wire size 125 amp sub panel
    I have a 125 amp meter panel and want to run a 100 amp service to a panel in my shop. The distance is approx 50 feet. What size conductors are required?
    Thanks, dave
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    May 8, 2012, 03:49 PM
    As a minimum , use 3 - #2 Alum XHHW insulation and 1 - #4 Al XHHW as equipment ground in 1-1/4" conduit, complete with elbows , fittings, and connectors from panel to panel.

    Technically, need to use a 90 Amp circuit breaker. Many inspectors allow a 100 amp breaker used.
    davheb's Avatar
    davheb Posts: 3, Reputation: 1
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    #3

    May 8, 2012, 07:45 PM
    I'm only thinking of using copper!!
    davheb's Avatar
    davheb Posts: 3, Reputation: 1
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    #4

    May 8, 2012, 07:46 PM
    I'm only considering copper
    Washington1's Avatar
    Washington1 Posts: 798, Reputation: 36
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    #5

    May 8, 2012, 08:48 PM
    I agree with TK. To add: Although 50 feet is not that far, it "may be” possible to need more than four bends to complete your conduit run. Per code:There shall not be more than the equivalent of four quarter bends (360 degrees total) between pull points. An example of a pull point would be and electrical box.
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #6

    May 9, 2012, 02:32 AM
    Then 3- # 3 and 1- #8 copper THHN/THWN.
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