Check the listing for details. Liftmaster 02703 NEMA 7/9 3-Button Control Station Explosion Proof Surface Mount. Condition: New. Listed at 299.95 USD. Liftmaster 02703 NEMA 7/9 Liftmaster 02703 NEMA 7/9 3-Button Control Station Explosion Proof Surface Mount Liftmaster 02703 NEMA 7/9 Three-Button Control Station for Industrial Operators DescriptionThree Button Control StationHazardous Area (NEMA 7/9)Die cast hazardous area enclosure meets NEC requirements for Class 1, Divisions I and II, Group D, and Class 2, Divisions I and II, Groups F and G. Features and Benefitshalt-function button ideal for heavy-kinetic; work areas with constant movementNEMA 7 indicates housing is designed to maximize containment of internal electrical or combustive malfunctionsNEMA 9 indicates housing is designed to maximize resistance to ingress of combustive dustsafety feature of elevated plate-cover OPEN/CLOSE/STOP allows complete control of the door. May be used with all LiftMaster industrial operators. Payments & Returns Policy