GiantTech
I have the machines listed here on this site, in the classified section.......... https://forum.ih8mud.com/merchandise-storefront/205864-plasma-cutters-tig-welders-%40-prices-diyer-will-appreicate.html
Main reason for the 4 conductors is to isloate the neutral conductor( current carrying) from the machines frame and still "GROUND" the frame. You see old style 3 prong installations can be a shock hazard :crybaby: if you were to contact that frame and be a better path to ground than is the...