Eliminate need for adding sealing fittings and compound at each conduit entrance|Dozens of possible combinations of push buttons, selector switches and pilot lights|Smooth, rounded integral bushing in each EFD/EFDB hub protects conductor insulation|Accurately tapped, tapered hubs for tight, rigid joints and ground continuity|Stainless steel pushbutton shaft operates within stainless steel bushing assuring long, maintece free operation|Pushbutton and selector switch contacts are silver cadmium oxide which are sealed in lower phenolic chamber isolated from corrosive elements|Assures positive contact and long, trouble free operation|Enclosed stainless steel helper spring prevents accidental operation of pushbutton in severe vibration installations|Pushbutton models also available with dust cap for use in areas where excessive dust, moisture or corrosive conditions are encountered|Factory sealed eliminates need for adding sealing fittings and compound at each conduit entrance|Switch is enclosed in separate sealing chamber|Sealing chamber has smooth, double flanges that mate both to cover and mounting enclosure to provide flame-tight joints