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 4 Pole 3 Wire, Number of Breaker Poles 3, 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 ACP3034BC, CPH3034BC, Grounding Style Shell, Extra Pole, Enclosure Material Copper-Free Aluminum, Enclosure Finish Epoxy Powder Coated, Enclosure Class I Div 1 and 2 Group B C D, Class II Div 1 and 2 Group F G, Class III, NEMA 3/3R/4/4X/7CD/9FG, Size 9.06 inch W x 13.95 Inch x 17.3 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