Pin and Sleeve Receptacle Assembly, Voltage Rating 125 VAC, Current Rating 20 Ampere, Power Rating 1 HP, Number of Poles 3, Number of Wires 2, Hub Size 1/2 to 3/4 Inch, Box Type Single Gang, Mating Plug CPP516, Enclosure Class I Div 1 and 2 Group C D, Approval CSA C22.2, Constructional Feature Explosionproof, Dust-Ignitionproof, Material Baked Gray Epoxy Clad Copper-Free Aluminum