Rocker Arm Operated Tumbler Switch, 3-Way, Type of Operator Rocker Arm, Amps 20, HP 1 HP @ 120VAC and 2 HP @ 240VAC, Voltage 120-277VAC, Legend Markings On/Off, Mounting Mounting Holes/Hubs, Height 4.63 In., Width 3.00 In., Depth 4.69 In., Material of Construction Malleable Iron, Standards UL 894, UL1203, Class I, Division 1, Groups B, C, D; Class I, Division 2, Groups B, C, D; Class II, Division 1 and 2, Groups E, F, G; and Class III Hazardous Location Tumbler SwitchesRocker Arm Operated Tumbler SwitchesClass I, Div. 1 and 2, Groups C and D. Class II, Div. 1 and 2, Groups E, F, and G. Class III. Feature enclosures with external mounting lugs for easy mounting. Smooth, rounded integral bushing in each hub protects conductor insulation. Enclosures have internal ground screw. Contender Series are interchangeable with Crouse-Hinds Series and are NEMA rated 3, 7CD, and 9EFG. EDS Series are NEMA rated 3, 7CD, and 9EFG.