Pin and Sleeve Receptacle Assembly, Voltage Rating 600 VAC, 250 VDC, Current Rating 100 Ampere, Number of Poles 4, Number of Wires 3, Hub Size 2 Inch, Cover Type Spring, Mating Plug ACP1034CD, 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/7CD/9FG, Approval UL 894/1010 /1203/1682/1686, CSA C22.2, Application Lighting Systems, Conveyors, Heaters, Motor-Generator Sets, Air Conditioners, Compressors, Pumps, Constructional Feature Explosionproof, Dust-Ignitionproof, Material Epoxy Powder Coated Copper-Free Aluminum, Grounding Style Shell, Extra Pole