Will 10 ga wire handle a current load of 40 amp at 120 feet?

2 Responses to “Will 10 ga wire handle a current load of 40 amp at 120 feet?”

1. Comment by Roger

   10 gauge wire is good for 30 amps, you should use 8 gauge wire.

2. Comment by Achmed The Dead Terrorist

   I found a nice little chart that after you put in you variables for distance and amps. It will tell you the resistance and voltage drop.

   I put in some random numbers and knowing how much consumpsion my table saw, compressor, vacuum system, etc… I would not let your voltage drop more than about 4 or 5 volts max. More loss than than and you start having problems.

   I have 6 ga wired to my shop.

   Personally, I bookmarked that page for future use.

   http://www.stealth316.com/2-wire-resistance.htm