Full Technical Description: Polarized Type; Electrogalvanized Feraloy Iron Alloy (Back Box), Natural Finished Copper Free Aluminum (Receptacle) Material; 3 Wire(S); 600 VAC at 50 to 400 Hz, 250 VDC Voltage Rating; 400 Ampere Current Rating; 3 Pole(S); Corrosion Resistant, Dirttight, Dusttight, Moisture Resistant, Weatherproof; (1) 2-1/2 Inch Top Hub Type; Spring Door; 1, Shell Grounding Style; ARKTITE[R] Brand; Approval UL 1682/1686, CSA C22.2; Size 23-5/8 Inch W X 19 Inch H; Application Chemical Plant, Compressor, Conveyor, Heating and Cooling Unit, Lighting System, Manufacturing Plant, Meat Packing Plant, Motor Generator Set, Process Industry, Welder; AREX Model