Pin and Sleeve Receptacle Interior, Type Receptacle, Constructional Feature Weatherproof/Explosionproof/Dust-Ignition Proof, Voltage Rating 600 VAC/250 VDC, Current Rating 30 Ampere, Number of Poles 4, Number of Wires 3, Grounding Style Shell, Extra Pole, Material Epoxy Powder Coated Copper-Free Aluminum, Approval UL 894/1010/1203/1682/1686, Enclosure Class I Div 1 and 2 Group B C D, Class II Div 1 and 2 Group F G, Class III, NEMA 3/3R/4/4X