Appleton EFS Series Explosionp...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$803.43
Appleton EFS Series Explosionproof Non-Sealed Tumbler Switch, Malleable Iron

Appleton EFS Series Explosionproof Non-Sealed Tumbler Switch, Malleable Iron

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Model: EFSC275-F13

In Stock (leaves warehouse same day if ordered before 3pm ET)

$803.43
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Appleton EFS Series Explosionproof Non-Sealed Tumbler Switch, Malleable Iron

Appleton EFS Series non-sealed tumbler switches deliver explosionproof, dust-ignitionproof switching for lighting and light power loads in classified hazardous locations. Built with malleable iron bodies and covers, these switches are rated 20 Amp and 30 Amp for use with 120-277 Vac circuits, and are certified for Class I, Division 1 and 2, Groups C, D; Class II, Division 1 and 2, Groups E, F, G; and Class III locations. Available in 1- or 2-gang configurations, EFS switches are engineered for chemical and petrochemical plants, refineries, and other process industries where ignitable vapors, gases, or highly combustible dusts are present.

Key Features

  • Configuration Options: Available in 1- or 2-gang copperfree (4/10 of 1% max.) aluminum bodies and covers in addition to standard malleable iron construction, for flexible mounting layouts.
  • Durable Construction: Malleable iron body and covers with a Nylon 6/6 handle resist damage in demanding industrial environments.
  • Explosionproof Design: Smooth ground mating surfaces between cover and mounting enclosure assure a flame-tight joint, preventing arcing of enclosed switches during connect and disconnect operation.
  • Amperage & Voltage Rating: 20 Amp and 30 Amp units available for use with 120-277 Vac lighting and light power loads.
  • Stainless Steel Hardware: Stainless steel hex head cap screws attach the cover to the mounting enclosure, and each handle uses a close-tolerance threaded stainless steel shaft to meet explosionproof requirements.
  • Operator Handle: Choice of front-operating or side rocker arm handle, each lockable in the ON or OFF position.
  • Conductor Protection: Smooth, rounded integral bushing in each hub protects conductor insulation.
  • Finish: Triple-coat finish of (1) zinc electroplate, (2) chromate, and (3) epoxy powder coat for corrosion resistance.
  • Mounting: External mounting lugs on enclosures and an internal ground screw ease installation and grounding.

Certifications & Compliance

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

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Chemical and Petrochemical Plants
  • Refineries and Process Industries
  • Hazardous and Classified Locations (Class I, II, III)
  • Lighting and Light Power Load Switching
  • Explosionproof Electrical Installations

Why Appleton?

Appleton EFS Series tumbler switches combine malleable iron construction, stainless steel hardware, and a triple-coat zinc electroplate, chromate, and epoxy powder coat finish to deliver dependable, code-compliant switching in the harshest classified environments. Backed by Class I, Division 1 and 2, Groups C, D; Class II, Division 1 and 2, Groups E, F, G; and Class III listings, these switches are built for reliable, arc-preventing performance in demanding chemical, petrochemical, and process-industry applications.

Manufacturer Resources

Appleton Full Line Catalog

Product Specs

Product Type:
Explosionproof Switch
Voltage Rating:
120-277 VAC
Product Finish:
Triple-Coat Zinc Electroplate, Chromate, Epoxy Powder Coat
Product Material:
Malleable Iron
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Toggle Switches

Appleton EFSC275-F13 – Frequently Asked Questions

1) Can the Appleton EFS tumbler switch be used in a Class I, Division 1 area?
Yes. The EFS Series explosionproof tumbler switch is certified for Class I, Division 1 and 2, Groups C and D; Class II, Division 1 and 2, Groups E, F and G; and Class III locations, with NEMA 7CD and 9EFG enclosure ratings. That covers ignitable vapors and gases as well as combustible dusts, which is why these go into refineries, chemical and petrochemical plants, and similar process areas. Note it does not cover Groups A and B.
2) What loads can the EFS explosionproof switch handle, and at what voltage?
EFS non-sealed tumbler switches are made in 20 Amp and 30 Amp versions for 120-277 Vac lighting and light power load switching. They are switches, not motor disconnects, so size them to the lighting or small power branch circuit they are controlling.
3) Can an EFS explosionproof switch be locked out in the OFF position for maintenance?
Yes. EFS handles, in either the front-operating or side rocker arm style, lock in the ON or OFF position. That lets an electrician padlock a lighting circuit off during work in the area. Choose the handle style when you order, since the two operate from different faces of the enclosure.
4) What does non-sealed mean on an Appleton EFS switch, and is it safe in a Division 1 area?
Non-sealed means the switch contacts themselves are not hermetically sealed; containment is achieved by the enclosure instead. The cover and mounting enclosure have smooth ground mating surfaces that form a flame-tight joint, so any arcing during make and break stays contained. The assembly is certified for Class I, Division 1 and 2, Groups C and D on that basis. Keep the cover screws fully torqued and the mating surfaces clean and undamaged, since the joint is the protection.
5) Which Appleton EFS model is the malleable iron switch, and is aluminum an option?
The model here is EFSC275-F13, built with a malleable iron body and cover. Appleton also offers the EFS line in 1- or 2-gang copperfree aluminum (4/10 of 1% max copper) bodies and covers. Copperfree aluminum is the usual call where sulfide or ammonia atmospheres attack copper alloys; malleable iron is the heavier, impact-tolerant choice for general industrial service.
6) Will this switch hold up outdoors in a corrosive plant environment?
Corrosion protection comes from a three-layer finish: zinc electroplate, then chromate, then an epoxy powder coat. Cover screws are stainless steel hex head cap screws, and each handle runs on a close-tolerance threaded stainless steel shaft. The handle itself is Nylon 6/6. That combination is intended for wash-down and chemical-exposure areas of process plants.
7) How does the EFS switch mount and get grounded?
The enclosures have external mounting lugs, so the unit fastens to a wall, strut, or stand without opening it, and there is an internal ground screw for the equipment grounding conductor. Each conduit hub has a smooth, rounded integral bushing so pulled conductors are not cut on the hub edge.
8) Can I gang two EFS explosionproof switches in one enclosure?
Yes, the EFS line is offered in 1- or 2-gang configurations, so two switching points can share one enclosure instead of running two separate housings. Useful where you are controlling two lighting circuits from the same location in a classified area.
How fast can I get the Appleton EFSC275-F13 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Appleton EFSC275-F13 come with a warranty?
Absolutely. The Appleton EFSC275-F13 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Appleton EFSC275-F13?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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