a compressor of the size you have likely draws 15-17amps, but calls for a 30A breaker due to startup load. I wouldn't mix and match wires. There are a lot of variables here..like how far is the run of wire, is the run going to be ouside, etc. How far is your breaker panel from the compressor site? Why not just wire it direct? That way you don't have to worry about the drying, plug, etc.