Pin and Sleeve Clamp Cover Plug, Type Compressor, Motor Generator Unit, Polarized, Pump, Welding, Spring Door, Constructional Feature Weatherproof, Voltage Rating 600 VAC/250 VDC at 50 to 400 Hz, Current Rating 400 Ampere, Number of Poles 4, Number of Wires 3, Grounding Style 2, Shell, Extra Pole, Minimum Cable Outer Diameter 2.500 Inch, Maximum Cable Outer Diameter 3.000 Inch, Material Epoxy Powder Coated Copper-Free Aluminum, Approval UL 1682/1686/50E/ E145916/E145917, CSA C22.2