I want to run a buried 125' line to a 30A subpanel in my garden shed. I will only be running hand tools and lighting. Was planning on using 12/3 from the house to the subpanel. Does that sound like the right size wire for the job?

  • Are you planning to breaker this feeder at 20A? How many square feet is the shed? Is there a reason you want to use a direct bury cable instead of conduit? Dec 29 '17 at 21:33
  • I was going to add 2 - 15 amp breakers in the subpanel - one for the lights and the 2nd for receptacles. The shed is 192 SF. The direct bury cable is going to be used to reduce expense and make it a bit easier to bury. I have really hard clay soil in NC and I think cable will be easier to bury.
    – davarney60
    Dec 29 '17 at 23:57
  • One advantage of conduit is that instead of trenching it, you may be able to use trenchless techniques... Dec 30 '17 at 0:13
  • And when I say "breaker the feeder at 20A" I'm talking about the breaker at the main-panel end of this line... Dec 30 '17 at 0:13
  • If your intending to use a 30amp breaker in the house the minimum wire size is 10gauge.
    – Tyson
    Dec 30 '17 at 0:39

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.