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Wire gauge vs. lenght

  1. Aug 31, 2006 #1
    Need help. Is there a simple formula to calculate the gauge of wire to use vs. lenght for a know amp rating of a device.

    I have a device I need to install a couple of hundred feet from the house and know the amps it pulls but do not know the formula to figure the best gauge wire to run to it from a breaker.


    Thanks, that helped a lot.
    Last edited: Sep 1, 2006
  2. jcsd
  3. Aug 31, 2006 #2


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  4. Aug 31, 2006 #3


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    No. The wire guage you use is independent of length, unless you want to minimize transmission loss. If you've got voltage to spare and don't want to overspend on wire, just pick the gauge on the basis of the current draw - any wire gauge table will give you this data (look up AWG).
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