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

    Apr 26, 2012, 10:08 AM
    What size wire do I need for 250' run
    I am installing a 100 amp sub panel 12 circuit from my meter to portable buildings. Actual amps is about 70. I was told to use either #4 copper or #2 aluminum. For the 250' run. I will be running it on poles exposed.
    One has suggested I use 2-2-2-4 aluminum for cost reasons. I am confused on the size of the wire. Is that #2 AWG or 2/0 AWG? What are the differences?What recommendations can anyone suggest?
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #2

    Apr 27, 2012, 04:48 AM
    You need to use a quadruplex aerial cable, has 3 - #2 aluminum insulated and 1- #4 bare that will act as the messenger cable to attach to each building using an insulator.

    You are aware to use a ground rod at the building?
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    leonboy's Avatar
    leonboy Posts: 2, Reputation: 1
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    #3

    Apr 27, 2012, 09:34 AM
    Thanks for your confirmation. Yes I am installing a ground rod at the building.
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