Plug, Current Rating 30 A, Hazardous Location Specification Class I, Div 1 and 2, Group B, C, D, Class II, Div 1 and 2, Group F, G, Class III, Div 1 and 2, Horsepower Rating 20 hp, Housing Color Gray, Number of Poles 4, Number of Wires 3, Phase Three, Voltage Rating 600V AC, Cap Type Screw-On Cap, Connection Orientation Straight, Face Diameter 1.86 in, For Maximum Cable Diameter 1.125 in, For Minimum Cable Diameter 0.5 in, Grounding Grounded, Grounding Style Style 2