Hey Thanks Rrumbler;
Ya both my welders and my compressor have 3 wires, I wired them when I got them.
Both my dryer and my stove in Florida had three wires as well.
When I got here the outlet in the walls for the stove and the dryer were both 4 prong.
So I went to home depot to get some new cords and the guy said to just change
the outlets them selves because it was cheaper then buying new cords.
I used the ground to ground out the box then used the neutral and two power
wires to hook it up.
So thats what I did and saved about $20 bucks.
So anyway all my 220 stuff will be 3 prong now.
Kurt