Hazardous Location GFI Cover, U-Line Receptacle and Box, Voltage 125, Hz 60, Amps 20, Hub Size 3/4, Hub Style Dead-End, Screws Stainless Steel, Mounting Box Copperfree Aluminum, 2 Gang, Material Copperfree Aluminum, Finish Baked Gray Epoxy Clad Finish, Standards UL 943, 1203, UL Listed for Class I, Division 1 Groups C, D; Class I, Division 2, Groups B, C, D; Class II, Division 1 and 2, Groups E, F, G; and Class III RestrictionsNote: Covers are UL Classified to mount on Crouse-Hinds EDS back boxes. Appleton receptacles are UL Classified for use with Crouse-Hinds ENP Series plugs. Hazardous Location 20A Receptacles and GFI Covers with BoxGFI Cover and BoxesClass I, Div. 1, Groups B (1-gang only), C, and D. Class I, Div. 2, Groups B, C, and D. Class II, Div. 1 and 2, Groups E (1-gang only), F, and G. Class III. NEMA rated 3, 3R, 7BCD, and 9EFG. Feature factory-sealed construction so no external seals are required. Arcing is confined to the interior sealed chamber. Rated 20A, 125VAC, with 5mA trip setting.