Plasma Cutter Cutting Configuration Plasma Cutting Effective Input Current 20 A @ 120V (Single-Phase) For Material Type Mild Steel For Maximum Material Thickness 1/4 in For Minimum Material Thickness 1/8 in Input Frequency 60 Hz Input Voltage 120 V AC Max Input Current 20 A @ 120V (Single-Phase) Open Circuit Voltage 375 V DC Phase Single-Phase Plasma Cutter Model 500564 Maximum Output Current 12 A Plasma Cutting Minimum Output Current 12 A