Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar

    Staff: Mentor

  4. Aug 31, 2006 #3


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    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).
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Wire gauge vs. lenght
  1. Wire Gauge (Replies: 3)

  2. Wire Gauge (Replies: 1)