Explosionproof Pin and Sleeve Receptacle and Circuit Breaker, Constructional Feature Explosionproof, Dust-Ignitionproof, Receptacle Voltage Rating 125 VAC, Receptacle Current Rating 20 Ampere, Hub Size 1/2 to 3/4 Inch, Number of Hubs 1, Enclosure Material Copper-Free Aluminum, Enclosure Finish Baked Gray Epoxy Clad, Enclosure Class I Div 1 and 2 Group B C D, Class II Div 1 and 2 Group G and Coal Dust, Class III NEMA 7BCD/9G, Approval CSA C22.2, Constructional Feature Explosionproof, Dust-Ignitionproof