Selector Switch Control Station Cover Assembly, Constructional Feature Explosionproof, Dust-Ignitionproof, Operation Type Momentary/Spring Return/ Maintained, Contact Configuration 3NO-1NC, Number of Selector Switches 1, Number of Circuits 2, Number of Positions 3, Operator Type Front Operated Knob, Material Zinc Electroplated Chromate Epoxy Power Coated Malleable Iron, Enclosure Class I Div 1 and 2 Group B C D, Class II Div 1 and 2 Group E F G, Class III, NEMA 3/7CD/9EFG, Used On EFD Series Factory Sealed Selector Switch, Approval UL 508/698/1203, Application Selector Switch are Used in Conjunction with Contactor/Magnetic Starter for Remote Control of Motor, For Installation in Chemical and Petrochemical Plant, Refinery and other Process Industries