Any questions please email You could run this little 140 with a heavy duty 12/3 extension cord plugged into your 220v, no heavy amperage draw here (just 17.4 amps) with IGBT inverter and still weld 3/16" with 5/32" rod. Use 3 of the 4 pins from a dryer outlet, the two blades and the ground (220). the 4th pin you don't use that's the neutral and is used by the dryer to make 110 for control circuit.