Steve,
Not sure how to put this, but I am an electrical ninny since I tried to change an outlet when I was 16, and got some house current...so I went to Lowes, found someone who knew what they were talking about or at least I believed they did. They showed me how to wire up the compressor, the plug needed with the appropriate gauge of wire, the box, everything I needed, then proceeded to show me how to do the master wiring on the panel box.
I bought the stuff, (the wiring was already in the conduit for the 220) and did it all my self and have had no repercussions.(house burning down, massive shocks when turning on the compressor, etc.)
It is really easy to do! Probably took me longer time wise than it should, but it works and I had my neighbors dad who is an electrician come look at it when I was done and he said "looks nice".
If I did it, you can too!
Russ