Explosionproof Pin and Sleeve Receptacle and Circuit Breaker, Constructional Feature Explosionproof, Dust-Ignitionproof, Breaker Voltage Rating 480 VAC, Breaker Current Rating 20 Ampere, Receptacle Voltage Rating 600 VAC, Receptacle Current Rating 30 Ampere, Receptacle Configuration 3 Pole 2 Wire, Number of Breaker Poles 2, Breaker Type EHD, Hub Size (1) 3/4 Inch, (1) 1-1/2 Inch (Top), (1) 3/4 Inch, (2) 1-1/2 Inch (Bottom), Hub Location Top, Bottom, Number of Hubs 3, Mating Plug ACP3023BC, CPH3023BC, Grounding Style Shell, Extra Pole, Enclosure Material Copper-Free Aluminum, Enclosure Finish Epoxy Powder Coated, Enclosure Class II Div 1 and 2 Group F G, Class III, NEMA 3/3R/4/4X/9FG, Size 5.57 Inch W x 14.14 Inch D x 16.57 Inch H, Approval UL 894/1010/1203/1682/1686, Insulating Blocks Material Fiber Glass Reinforced Polyester, Application Lighting Systems, Conveyors, Heaters, Motor-Generator Sets, Air Conditioners, Compressors, Pumps