Appleton EFD/EFDB and EDS Series Explosionproof Control Station

Appleton EFD/EFDB and EDS Series Explosionproof Control Station

The Appleton EFD/EFDB and EDS Series factory sealed control stations are explosionproof and dust-ignitionproof, confining device arcing within the enclosure to prevent ignition of surrounding atmospheres during motor and equipment control. Built with a malleable iron body and triple-coat finish, these control stations house push buttons, selector switches, and pilot lights for remote or local control of motors, contactors, and magnetic starters. Rated for Class I, Division 1 and 2, Groups B, C, D and Class II, Division 1 and 2, Groups E, F, G, plus Class III locations, with NEMA 3, 7CD, 9EFG enclosure ratings, they are engineered for classified areas where flammable vapors, gases, or combustible dusts are present, including chemical and petrochemical plants and refineries.

Key Features

• Explosionproof, Dust-Ignitionproof Design: Ideal for installation in chemical and petrochemical plants, refineries, and other process industries.
• Factory Sealed Construction: Eliminates the need for adding sealing fittings and compound at each conduit entrance.
• Durable Construction: EFD/EFDB backbox is malleable iron with a copperfree aluminum cover; EDS body and cover are malleable iron; all finished with a triple-coat process of zinc electroplate, chromate, and epoxy powder coat.
• Lockout Guards: EFD/EFDB momentary push buttons include lockout type guards as standard, with a hole accepting locks up to a 1/4" hasp to prevent unauthorized operation.
• Stainless Steel Shaft and Bushing: Push button shaft operates within a stainless steel bushing for long, maintenance-free operation.
• Sealed Silver Cadmium Oxide Contacts: Push button and selector switch contacts are isolated in a lower phenolic chamber away from corrosive elements for positive, trouble-free contact.
• Heavy-Duty Electrical Rating: Push buttons are rated 10 Amp, 600 Vac for reliable circuit control and selection.
• Pilot Light Assembly: EFD/EFDB factory sealed pilot lights include a red jewel/guard assembly with a 120 Vac/Vdc, 50/60 Hz, 6 Watt, Type 6S6 lamp for visual confirmation of remote function.

Certifications & Compliance

• Class I, Division 1 and 2, Groups B, C, D
• Class II, Division 1 and 2, Groups E, F, G
• Class III
• NEMA 3, 7CD, 9EFG

Technical Specifications

• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Chemical and Petrochemical Plants
• Refineries and Process Industries
• Remote Motor and Contactor/Starter Control
• Classified Hazardous Locations (Class I, II, III)
• Circuit Selection and Visual Status Indication

Why Appleton?

Appleton EFD/EFDB and EDS control stations combine a malleable iron, triple-coat finished body with sealed silver cadmium oxide contacts and a stainless steel push button shaft and bushing for dependable, maintenance-free operation in demanding hazardous locations. Factory sealing removes the need for field sealing fittings, while lockout guards, brass-screw terminals, and corrosion-resistant captive cap screws support safe, code-compliant motor control for professional electrical installations.

What this is: EFD275-NL-Q is a 2-gang, dead-end EFD Series enclosure body with an internal ground screw and triple-coat malleable iron finish. The "NL" designation means this body ships without switch ears, built specifically to accept a separate sealing-chamber/switch assembly rather than a factory-installed device. It is best suited to installations building a custom multi-device station. For a ready-to-install complete 1-gang switch station, see the EDS175-RU1 listing; for a blank cover only, see ESKBBQ.