Appleton FSQC Series Interlock...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,948.47
Appleton FSQC Series Interlocked Explosionproof Receptacle

Appleton FSQC Series Interlocked Explosionproof Receptacle

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Model: FSQC3430

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

$3,948.47
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Appleton FSQC Series Interlocked Explosionproof Receptacle

The Appleton FSQC Series covers 30, 60 and 100 Amp interlocked receptacles built for hazardous-location power distribution. Each unit pairs an explosionproof and dust-ignitionproof housing with an interlocked disconnect switch, so the plug can only be inserted or removed when the circuit is safely de-energized. Designed to mate with Appleton Powertite™ plugs, the FSQC is rated up to 600 Vac and is suitable for Class I, Class II and Class III hazardous environments as well as NEMA 3, 3R, 4, 4X, 7CD and 9FG applications.

Key Features

  • Tapped NPT Conduit Openings: 3/4" for 30 Amp, 1-1/2" for 60 Amp, and 2" for 100 Amp units, located at top and bottom for flexible feed-thru wiring.
  • Interlocked Disconnect Switch: Provides safe connect/disconnect operation at 30, 60 or 100 Amp, 600 Vac maximum, three pole, non-fused motor circuit switch — insert the plug and rotate the collar to ON to energize, rotate to OFF to safely remove.
  • Durable Construction: Receptacle body, mounting box, covers and plug housings are copper-free (4/10 of 1% max.) aluminum finished in epoxy powder coat for corrosion resistance.
  • Insulating Blocks: Fiberglass-reinforced polyester insulators deliver superior dielectric and mechanical strength with the lowest arc tracking.
  • Brass Contacts: Exert constant pressure along the entire contact surface for superior, reliable electrical connection.
  • Beryllium Copper Wire Springs: Maintain consistent contact spring tension over repeated cycles.
  • Spring Door & NEMA 4 Cover: A spring-loaded door keeps dust out of the receptacle when the plug is not in use; a screw cover is also supplied free of charge for NEMA 4 applications.
  • Powertite™ Plug Compatible: Style 2 (shell and extra pole) grounding, engineered specifically to accept the Powertite Series plug.

Certifications & Compliance

  • Class I, Division 1 and 2, Groups B, C, D
  • Class II, Division 1 and 2, Groups F, G
  • Class III
  • NEMA 3, 3R, 4, 4X, 7CD, 9FG

Technical Specifications

  • Number of Poles: 4
  • Number of Wires: 3
  • Voltage: 120 Vac, 240 Vac, 480 Vac or 600 Vac
  • Amperage: 30, 60 or 100 Amp
  • Wire Range: 30 Amp: #10-#8, 60 Amp: #6-#4, 100 Amp: #2-1/0
  • Plug Cable Diameter: 30 Amp: 0.500 to 1.125", 60 Amp: 0.500 to 1.375", 100 Amp: 0.875" to 1.906"
  • Mounting Box Entries: Feed-Thru

Typical Applications

  • Hazardous Location Power Distribution
  • Class I, II and III Industrial Environments
  • Oil, Gas and Chemical Processing Facilities
  • Motor Circuit Disconnect and Interlock Applications
  • Wet and Outdoor Industrial Locations
  • Powertite Plug-and-Receptacle Power Connections

Why Appleton?

Appleton engineers the FSQC Series with copper-free aluminum housings, brass contacts, and beryllium copper springs to deliver reliable, code-compliant performance in demanding hazardous-area environments. The interlocked disconnect switch and dust-excluding spring door add a further layer of operational safety, making the FSQC a dependable choice for professional electrical installations where explosionproof, dust-ignitionproof performance is required.

Product Specs

Product Type:
Receptacle
Product Finish:
Epoxy Powder Coat
Series:
FSQC
Product Material:
Aluminum
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Receptacles & Outlets

Appleton FSQC3430 – Frequently Asked Questions

1) Can you plug in or unplug an Appleton FSQC receptacle while the circuit is live?
No, and that's the point of the FSQC Series. The receptacle is interlocked with a disconnect switch: you insert the Powertite plug, then rotate the collar to ON to energize. To remove the plug you rotate back to OFF, which de-energizes the circuit first. The switch is a three pole, non-fused motor circuit switch rated 600 Vac maximum at 30, 60 or 100 Amp.
2) What hazardous location classes is the Appleton FSQC explosionproof receptacle approved for?
Class I, Divisions 1 and 2, Groups B, C and D; Class II, Divisions 1 and 2, Groups F and G; and Class III. Enclosure ratings are NEMA 3, 3R, 4, 4X, 7CD and 9FG, so it covers wet, outdoor and corrosive industrial areas as well as explosionproof and dust-ignitionproof duty.
3) What size conduit openings does the FSQC receptacle have, and can I feed through it?
Conduit openings are tapped NPT and sized by amperage: 3/4 inch on the 30 Amp, 1-1/2 inch on the 60 Amp, and 2 inch on the 100 Amp. They're located at both top and bottom of the mounting box, so feed-thru wiring is supported without a separate junction.
4) What wire size can I land in an Appleton FSQC receptacle?
Wire range follows the amp rating: #10 to #8 on the 30 Amp, #6 to #4 on the 60 Amp, and #2 to 1/0 on the 100 Amp. Size your feeder to the unit you're ordering, since the terminals on a 30 Amp body won't take 1/0.
5) Which plug mates with an Appleton FSQC receptacle?
The FSQC is engineered to accept the Appleton Powertite Series plug. Grounding is Style 2, shell and extra pole. The receptacle is 4 pole, 3 wire, so the mating plug has to match that configuration.
6) Can I use a standard industrial locking receptacle instead of an explosionproof one in a Class I area?
No. A locking receptacle like the Eaton 50A 600V/250V industrial locking device or the Pass & Seymour L2130R is a general-purpose industrial wiring device with no hazardous-location listing. If the area is classified Class I, II or III, you need a listed explosionproof unit such as the Appleton FSQC, which carries Class I Div 1 and 2 Groups B, C, D, Class II Div 1 and 2 Groups F, G, and Class III.
7) Can a 30A locking receptacle like the Pass & Seymour L2130R be used in place of an Appleton FSQC interlocked receptacle in a Class I Division 1 area?
No. The Pass & Seymour L2130R is a 30A L2130 single locking receptacle intended for general industrial use, and it carries no hazardous-location rating. The Appleton FSQC Series is an explosionproof and dust-ignitionproof device rated for Class I Divisions 1 and 2 Groups B, C and D, Class II Divisions 1 and 2 Groups F and G, and Class III, with an interlocked disconnect switch so the plug can only be inserted or withdrawn with the circuit de-energized. A twist-lock device of the L2130R type is the right choice only where the area is unclassified. In a classified area the FSQC is what the code language on the drawing is asking for.
8) For a 600V motor connection in a non-classified industrial room, is the Eaton 7379 locking receptacle an alternative to the Appleton FSQC?
It can be, but only where the area is unclassified. The Eaton 7379 is an extra heavy duty industrial locking receptacle rated 50A at 600V/250V AC/DC, so it covers a similar voltage class for a plug-and-cord motor connection. What it does not provide is the explosionproof, dust-ignitionproof housing or the interlocked disconnect switch of the Appleton FSQC Series, which is rated up to 600 Vac in 30, 60 and 100 Amp versions and only energizes after the plug is inserted and the collar is rotated to ON. If the room is a Class I, II or III location, or the enclosure has to meet NEMA 7CD or 9FG, the FSQC is the device to specify.
9) What cable diameter will the Powertite plug accept on a 100 Amp FSQC setup?
Plug cable diameter ranges are 0.500 to 1.125 inches at 30 Amp, 0.500 to 1.375 inches at 60 Amp, and 0.875 to 1.906 inches at 100 Amp. Check the outside diameter of the portable cord you're terminating against that range before you order, since an undersized cord in a 100 Amp plug won't clamp properly.
10) Will an Appleton FSQC receptacle hold up in a salt air or chemical plant environment?
The housing, mounting box, covers and plug bodies are copper-free aluminum (4/10 of 1 percent maximum copper) with an epoxy powder coat finish for corrosion resistance, and the enclosure carries NEMA 4X. Copper-free aluminum is what's specified for refinery and chemical service where trace copper is a concern.
11) Do I need to buy a separate cover to get a NEMA 4 rating on the FSQC?
No. A spring-loaded door comes on the receptacle to keep dust out when no plug is inserted, and a screw cover for NEMA 4 applications is supplied at no extra charge with the unit.
12) Is the Appleton FSQC a good choice for a motor disconnect at the machine?
That's a listed application for it. The interlock is a three pole, non-fused motor circuit switch at 600 Vac maximum, so it serves as both the plug connection and the disconnecting means for a motor circuit in a hazardous area. If you need a motor-duty device in an ordinary, non-classified location, something like the Bryant 430R9W 4750DR 2-pole 3-wire 277V motor-duty receptacle is the general-purpose route instead.
13) What should I use instead of the Appleton FSQC for a flanged inlet or panel-mounted cord connection in a clean industrial area?
Look at the Bryant 70520FR, a 7 Series NEMA flanged locking receptacle, for flush panel or equipment-face mounting where the area is unclassified. It mounts through a flange on the equipment rather than into a threaded explosionproof enclosure. The Appleton FSQC Series takes tapped NPT conduit openings instead, 3/4 inch on the 30 Amp, 1-1/2 inch on the 60 Amp and 2 inch on the 100 Amp, at top and bottom for feed-thru wiring, and mates specifically with Appleton Powertite plugs. The two are not interchangeable at the plug or at the box.
14) Is there a simpler motor-duty receptacle than the Appleton FSQC for a 277V fan or pump circuit?
For an unclassified location, the Bryant 430R9W is a 4750DR series 2-pole 3-wire 277V motor-duty receptacle and is a far simpler device for a small motor drop. It does not include a disconnect interlock or a hazardous-location enclosure. The Appleton FSQC Series combines the receptacle with a three pole non-fused motor circuit switch rated 30, 60 or 100 Amp at 600 Vac maximum, interlocked so the plug cannot be pulled under load, in a copper-free aluminum housing with epoxy powder coat. Choose the FSQC when the motor circuit sits in a Class I, II or III area or when the disconnect has to be part of the receptacle.
15) We standardize on heavy-duty spec grade receptacles like the Pass & Seymour 26352W. Does that cover our hazardous area outlets too?
No. The Pass & Seymour 26352W is a specification grade 20A 125V decorator duplex receptacle for general 125V convenience power, and the Eaton 5262W is an industrial specification grade 15A 125V 5-15R duplex in the same family of use. Spec grade describes construction durability on a standard branch circuit, not area classification. Hazardous area outlets are a separate line item and the Appleton FSQC Series fills it, with an explosionproof and dust-ignitionproof body, interlocked disconnect and NEMA 3, 3R, 4, 4X, 7CD and 9FG ratings, in 30, 60 and 100 Amp. Facilities typically carry both: spec grade duplexes in the offices and shops, FSQC units at the classified process areas.
16) What's inside the FSQC that makes it hold up to repeated plugging and unplugging?
Contacts are brass, applying constant pressure across the full contact surface, and the contact springs are beryllium copper so tension stays consistent over repeated cycles. The insulating blocks are fiberglass-reinforced polyester, chosen for dielectric and mechanical strength with low arc tracking.
17) Is a weather-resistant or GFCI device such as the Pass & Seymour 2097HGI an equivalent for wet outdoor industrial locations where the FSQC is specified?
They solve different problems. The Pass & Seymour 2097HGI is a hospital grade 20A duplex self-test GFCI receptacle, built for personnel shock protection on a 125V branch circuit. The Appleton FSQC Series addresses the enclosure and the disconnect instead: a copper-free aluminum housing with epoxy powder coat finish, NEMA 3R, 4 and 4X ratings for wet and outdoor industrial use, a spring-loaded door that keeps dust out when the plug is removed, and a screw cover supplied for NEMA 4 applications. If the requirement on the drawing is ground-fault protection on a 125V outlet, a GFCI device answers it; if it is a wet, corrosive or classified power connection at 30 to 100 Amp, the FSQC does.
How fast can I get the Appleton FSQC3430 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 FSQC3430 come with a warranty?
Absolutely. The Appleton FSQC3430 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 FSQC3430?
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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