Mechanical Interlock Device, Circuit Breaker Amp Rating 20 A, Circuit Breaker Type Not Applicable, Current Rating 20 A, Fuse Protection Non-Fused, Fuse Type Not Applicable, Locking Handle Yes, NEMA Enclosure Rating Not Rated, Number of Poles 3, Number of Wires 4, Voltage Rating 480V AC, Compatible Plug Manufacturer Part Number 6C125, Grounding Grounded, Horsepower Rating 10 hp, Housing Material , Hub Diameter 1 in, Maximum Wire Size 10 AWG, Phase Three