Posted by jerryinidaho [64.234.49.226] on Friday, January 03, 2014 at 21:23:46 :
In Reply to: Voltage Drop Question for Air Compressor posted by Dave Horvath [76.125.248.166] on Friday, January 03, 2014 at 19:49:13 :
At least 8 ga. for 40 amps. But 300'...that's a long way.
I would consider upgrading your house to 200 amps, then feed the barn/shop with 100 amps. I think it would need 6 ga. wire.
But I'm a builder, not an electrician.
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