I will check when I go over there to see whether it is 10-2
or 10-3. A similar compressor at TSC draws 15 amps.
As someone else mentioned...I worry about the long distance
out to the building.

If the wire is 10-3, could another length of 10-3 be run
(will have to re dig the ditch but it would be fresh dirt)
and the two 10-3 wires be joined together in parallel?

thetiler