Appleton PLG Series Close-Up P...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$7.07
Appleton PLG Series Close-Up Plugs & BR Reducers

Appleton PLG Series Close-Up Plugs & BR Reducers

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Model: PLG-50S

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

$7.07
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Appleton PLG Series Close-Up Plugs & BR Reducers

The Appleton PLG Series Close-Up Plugs and BR Reducers are explosionproof and dust-ignitionproof fittings engineered for threaded metal conduit and IMC installations. Close-up plugs seal off unused threaded conduit openings, while BR reducers create a smaller opening size for transitioning between conduit sizes. Both are rated for Class I, Division 1 and 2, Groups A, B, C, D; Class II, Division 1 and 2, Groups E, F, G; and Class III hazardous locations, making them a dependable choice for demanding industrial and hazardous-duty electrical systems.

Key Features

  • Dual-Purpose Fittings: Close-up plugs close threaded conduit openings while BR reducers create a smaller opening size, both for use with threaded metal conduit and IMC.
  • Integral Bushing Protection: A smooth, rounded integral bushing in each hub protects conductor insulation from abrasion.
  • Precision Threading: Accurately tapped, tapered threads deliver tight, rigid joints and reliable ground continuity.
  • Hazardous Location Rated: Explosionproof and dust-ignitionproof construction for use in classified areas.
  • BR Reducer Materials: Copperfree (4/10 of 1% max.) aluminum with epoxy powder coat finish, or malleable iron with a triple-coat finish of zinc electroplate, chromate, and epoxy powder coat.
  • PLG Plug Materials: Sizes 1/2 thru 1 use copperfree (4/10 of 1% max.) aluminum with natural finish or steel with zinc electroplate; sizes 1-1/4 thru 6 use copperfree aluminum with natural finish or malleable iron with zinc electroplate.
  • Finish Options: Urethane paint is available on select items with the -UP suffix.

Certifications & Compliance

  • NEC/CEC Certified: Class I, Division 1 and 2, Groups A, B, C, D
  • Class II, Division 1 and 2, Groups E, F, G
  • Class III
  • Explosionproof
  • Dust-Ignitionproof

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Hazardous Location Conduit Systems
  • Class I, II & III Industrial Facilities
  • Threaded Rigid Conduit and IMC Installations
  • Conduit Opening Closure and Size Reduction
  • Oil, Gas, and Chemical Processing Environments
  • Explosionproof Electrical Enclosures and Raceways

Why Appleton?

Appleton PLG Close-Up Plugs and BR Reducers combine precision-tapped, tapered threads with corrosion-resistant aluminum, malleable iron, or steel construction to deliver tight, rigid joints and dependable ground continuity. Their explosionproof, dust-ignitionproof rating across Class I, II, and III hazardous locations makes them a code-compliant solution for professional electrical work where reliability in classified environments is essential.

Manufacturer Resources

Product Specs

Product Type:
Conduit Plug
Connection Type:
Threaded
Listing:
Class I, II & III Hazardous Location
Standards:
NEC/CEC
Department:
Electrical
Product Group:
Conduit & Raceway
Product Subgroup:
Conduit Fittings

Appleton PLG-50S – Frequently Asked Questions

1) Can Appleton PLG close-up plugs be used in a Class I Division 1 area?
Yes. The Appleton PLG close-up plugs and BR reducers are explosionproof and dust-ignitionproof, NEC/CEC certified for Class I, Division 1 and 2, Groups A, B, C, D; Class II, Division 1 and 2, Groups E, F, G; and Class III. That covers the typical oil, gas, and chemical processing classified areas as well as dusty Class II spaces.
2) What is the difference between an Appleton PLG plug and a BR reducer?
Two different jobs. A PLG close-up plug seals off an unused threaded conduit opening or hub so nothing gets in. A BR reducer keeps the opening open but steps it down to a smaller size, so you can transition from a larger hub to smaller conduit. Both are for threaded metal conduit and IMC, and both carry the same hazardous location rating.
3) Will Appleton PLG plugs thread into rigid conduit and IMC?
Yes, both. These are threaded fittings with accurately tapped tapered threads, intended for threaded metal conduit and IMC. The tapered thread is what gives you the tight, rigid joint and the ground continuity through the fitting. They will not work on EMT or any unthreaded raceway.
4) What do the letters at the end of Appleton PLG part numbers mean, like PLG-100S versus PLG-125?
The number is the trade size in hundredths of an inch, so PLG-50S is 1/2 inch, PLG-75S is 3/4, PLG-100S is 1 inch, PLG-125 is 1-1/4, PLG-150 is 1-1/2, PLG-200 is 2 inch, and PLG-250S is 2-1/2. The trailing letter is the material variant. On 1/2 through 1 inch, plugs are copperfree aluminum with natural finish or steel with zinc electroplate; on 1-1/4 through 6 inch, they are copperfree aluminum or malleable iron with zinc electroplate. A -UP suffix indicates urethane paint on select items.
5) I have an unused threaded hub on an explosionproof enclosure. Is a PLG plug the right way to close it?
That is exactly what it is for. A PLG close-up plug seals an unused threaded conduit opening and keeps the enclosure's explosionproof and dust-ignitionproof integrity intact for Class I, II, and III areas. Match the plug's trade size to the hub, from 1/2 inch up through the larger sizes in the series.
6) Which PLG material should I pick for a corrosive or wash-down plant?
For chemical and salt exposure, go with the copperfree aluminum version (4/10 of 1 percent copper max). Malleable iron plugs come zinc electroplated, and the BR reducers in malleable iron get a triple coat of zinc electroplate, chromate, and epoxy powder coat. Aluminum BR reducers are epoxy powder coated. If the environment is aggressive enough that you are already specifying coatings, the -UP urethane paint option is available on select items.
7) Do I need a separate bushing when I run conductors through an Appleton BR reducer?
No. Each hub has a smooth, rounded integral bushing that protects conductor insulation from abrasion, so there is no add-on bushing to order for the fitting itself.
8) Why does copperfree aluminum matter for hazardous location fittings?
Copperfree aluminum, limited here to 4/10 of 1 percent copper maximum, is the standard requirement for fittings used in classified areas because low-copper alloy resists the corrosion and sparking concerns associated with copper-bearing aluminum in petrochemical atmospheres. Appleton holds the PLG plugs and BR reducers to that limit.
How fast can I get the Appleton PLG-50S 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 PLG-50S come with a warranty?
Absolutely. The Appleton PLG-50S 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 PLG-50S?
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
Why buy the Appleton PLG-50S from ZenSupply?
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