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    keith_jones's Avatar
    keith_jones Posts: 10, Reputation: 1
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    #1

    Jun 16, 2007, 03:14 PM
    20 amp breaker, wire gauging
    What gauge of wire do I need to run off a 20 amp breaker?
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    Jun 16, 2007, 04:18 PM
    #12
    keith_jones's Avatar
    keith_jones Posts: 10, Reputation: 1
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    #3

    Jun 16, 2007, 04:21 PM
    Quote Originally Posted by tkrussell
    #12
    Is there a way to find out gauge of wire to amps, or is it something I should just learn to know it? I was just curious on how you find this out or if it's something you just remember. I have little experience in this area.
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #4

    Jun 16, 2007, 04:26 PM
    I use Table 310.16 of the National Electric Code. A link can be found in the Sticky Note "Read This First" of the Electrical Forum, along with instructions on exactly how to get to it.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #5

    Jun 16, 2007, 04:30 PM
    Breakers need to be weaker than the wire.
    You can use larger wire to reduce voltage drop.
    #10 30 Amps
    #12 20 Amps
    #14 15 Amps
    The Info provided by TK shows the rest.
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