Full Technical Description: Receptacle Type; Epoxy Powder Coated Copper-Free Aluminum Material; 3 Wire(S); UL 1682/1686/50E, CSA C22.2 Approval; 600 Volt AC 50/400 Hertz, 250 Volt DC Voltage Rating; 400 Amp Current Rating; 3 Pole(S); 1, Shell Grounding Style; POWERTITE[TM] Brand; Wire Recess Diameter 1.25 Inch; Ambient Temperature Rating -30 to 104 Deg F; Enclosure Rating NEMA 4; Used With Ebr/Ebrh/Jbr/MD2SR/Fsqc/ID2SR/Dbr Hazardous Interlocked Receptacle; Applicable Standard Nec/Cec