What gauge wire for a welder?

The appropriate gauge wire for a welder typically depends on the welder's amperage rating and the distance from the power source. For most home welders, a 6 AWG or 8 AWG wire is common for 240V circuits, especially for units drawing 30 to 50 amps. For higher amperage welders, such as those over 50 amps, a 4 AWG or even 2 AWG wire may be necessary. Always consult the welder's manual and local electrical codes for specific requirements.