Type Compressor, Motor Generator Unit, Polarized, Pump, Welding, Clamping Ring Constructional Feature Weatherproof Voltage Rating 600 VAC 3-Phase at 50 to 400 Hz, 250 VDC Current Rating 30 Ampere Number of Poles 3 Number of Wires 3 Grounding Style 1, Shell Minimum Cable Outer Diameter 0.39 Inch Maximum Cable Outer Diameter 1.375 Inch Material Epoxy Powder Coated Copper Free Aluminum Approval UL 1682/1689/50E, CSA C22.2 Contact Material Brass Application Compressor, Generator Unit, Pump, Shipping Docks, Shipping Ports, Welding Features / Benefits Contacts?Exert?Constant?Pressure?Along?the?Entire?Contact Surface,?Providing?Electrical?Continuity Solid?Brass?Contacts?with?Beryllium?Copper?Springs Choice of Receptacle Types Weatherproof Spring Door or Raintight Screw Cap Mounting Box and Clamping Ring Gaskets Provide Raintight Connections Cable Clamps Prevent Strain on Cables While Allowing Easy Cable Replacement Insulating Blocks Provide Dielectric and Mechanical Strength a Choice of Several Mounting Boxes Accommodates Different Installation Needs Floating Type?Plug?Contacts?Self Align?to Receptacle?Contacts