Quote:
10 gauge wire will handle a "constant" 30 amp load at 220 volts out to 75 ft with no discernable voltage drop. You don't need a bigger cable.
But, there is a difference between "need" and desire, and a compressor has a pretty heavy start up current, and that voltage drop is discernible, which is a main reason I like a heavier cable. Plus it makes a bigger compressor upgrade in the future less of a problem. 
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
| 
