I recently purchased a small welder. It came with no plug for the power supply. It shows a pic of the wire and says use a 3 prong, 220 VAC , polarized, twistlock plug. That part is not a problem . I have to run about a 20' wire. its says to use a 20amp breaker. Will I be OK using 12-2 for this considering 12-2 is rated @ 20 amps , this is a fairly short distance, and it is a small welder ?? Also The wire coming out of my welder has 3 wires , a black, white and green wire, the green has a tab around it with the letters PE on it ? I dont Know what the PE stands for ? My next question can I run the white and black from the 12-2 to each of the breakers (for 220)then the bare to the nuteral bar ? Then the Black and green from the welder to the black and white from my 12-2 , and white to the bare wire that runs to the nuteral. Thanks ahead of time. Im not totally stupid, I have wired my dryer and range and do some stuff around the house, I just dont want to fry my new welder. Again thanks.