U-Line Receptacle, Number Of Poles: 3, Number Of Wires: 2, Amperage Rating: 20 AMP, Voltage Rating: 125 VAC, Material: Aluminum, Nema Rating: NEMA 3, 3R, 3RX, 4X, 7BCD, 9FG, 12, Mounting: Panel Mount With 1-1/2 To 11-1/2 IN NPT, Motor Horsepower: 1 HP, Dimensions: 2.59 IN Width X 2.59 IN Height, Standard: Class I, Division 1 And 2, Groups B, C, D, Class II, Division, 1 and 2, Groups F, G, Class III, For ECP Mating Plugs