I saw this a few days ago but wasn't able to reply at that time. I have a Kobalt K7580v2 2 stage with the 22 amp moter and assume that it's the same one that you've got. I found my manual and it said to use a 40 amp breaker but I couldn't find the wire size. I don't remember who I asked but I think I was told that I could use a 10 guage wire if it was under 50'. Maybe an electrician will chime in but if not I'll climb up and see what wire size that I did use. I've had my compressor for a couple of years and it's doing great. Good luck with yours.