Appleton GRJ Series Explosionp...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$115.69
Appleton GRJ Series Explosionproof Conduit Outlet Box, Malleable Iron

Appleton GRJ Series Explosionproof Conduit Outlet Box, Malleable Iron

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Model: GRJX75

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

$115.69
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Appleton GRJ Series Explosionproof Conduit Outlet Box, Malleable Iron

Appleton GRJ conduit outlet boxes are explosionproof, dust-ignitionproof, and raintight, engineered for use in classified indoor and outdoor locations. Furnished with an internal ground screw and a corrosion-resistant malleable iron body, these boxes provide access for maintenance, allow connection of different lengths of conduit, and permit changing the direction of conduit runs. They are rated for Class I, Division 1 and 2, Groups C, D; Class II, Division 1 and 2, Groups E, F, G; and Class III classified locations.

Key Features

  • Durable Construction: Malleable iron bodies deliver high tensile strength and ductility, with strong resistance to corrosion, impact, and shock.
  • Threaded Design: Externally threaded body with an internally threaded cover for a secure, explosionproof joint.
  • Ground Continuity: Accurately tapped, tapered hub threads produce tight, rigid joints and reliable ground continuity.
  • Conductor Protection: Smooth, rounded integral bushing in each hub-type box protects conductor insulation from abrasion.
  • Conduit Compatibility: Designed for use with threaded metal conduit for general purpose wiring.
  • Complete Assembly: Furnished with covers and ready for installation.
  • Compact Footprint: Small, round conduit outlet box design suited for tight enclosure spaces.

Certifications & Compliance

  • Class I, Division 1 and 2, Groups C, D
  • Class II, Division 1 and 2, Groups E, F, G
  • Class III
  • Explosionproof, Dust-Ignitionproof, Raintight

Technical Specifications

  • NEC/CEC Certifications and Compliances: Class I, Division 1 and 2, Groups C, D; Class II, Division 1 and 2, Groups E, F, G; Class III
  • Standard Materials and Finishes: Malleable iron body with triple-coat finish (1) zinc electroplate, (2) chromate, and (3) epoxy powder coat

Typical Applications

  • Hazardous and Classified Location Wiring
  • Indoor and Outdoor Conduit Systems
  • Maintenance Access Points for Conduit Runs
  • Petrochemical, Industrial, and Marine Facilities
  • Wet and Corrosive Environment Installations

Why Appleton?

Appleton builds the GRJ Series from malleable iron with a triple-coat zinc electroplate, chromate, and epoxy powder coat finish, giving these outlet boxes lasting resistance to corrosion, impact, and shock in demanding classified environments. Every GRJ box combines accurately tapped hub threads, an integral conductor-protecting bushing, and an internal ground screw to deliver explosionproof, dust-ignitionproof, raintight performance electricians can count on for code-compliant installations.

GRJ body-style key: the letter after GRJ denotes hub count/arrangement, not just size — GRJX is the 4-hub "cross" configuration (this listing); GRJL is the 2-hub "L" configuration (see the separate GRJL listing); GRJT is the 3-hub "tee" configuration. These are different box shapes for different conduit-run layouts, not simple size variants of one part — confirm the hub count and layout you need before ordering.

Product Specs

Product Type:
Outlet Box
Product Finish:
Zinc Electroplate, Chromate, Epoxy Powder Coat
Series:
GRJ
Product Material:
Malleable Iron
Department:
Electrical
Product Group:
Boxes & Enclosures
Product Subgroup:
Electrical Boxes

Appleton GRJX75 – Frequently Asked Questions

1) Is the Appleton GRJX75 a four-hub box or a straight-through box?
GRJX is the four-hub "cross" configuration, so it takes conduit from four directions at one point. If you only need a two-way turn, the GRJL is the 2-hub "L" body, and the GRJT is the 3-hub "tee". Those are different box shapes for different conduit-run layouts, not size variants of the same part, so confirm the hub count and arrangement before ordering.
2) What hazardous location classes is the Appleton GRJ conduit outlet box rated 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. It is explosionproof, dust-ignitionproof and raintight, so it can be used in classified areas indoors or out. Note the Class I coverage stops at Groups C and D, so it is not the box for a Group A or B atmosphere.
3) Does the Appleton GRJX75 come with a cover, or do I order that separately?
It ships as a complete assembly with the cover included and ready to install. The body is externally threaded and the cover internally threaded, which is what forms the explosionproof joint, so use the cover supplied with the box rather than mixing covers between styles.
4) What kind of conduit does the Appleton GRJ box connect to?
Threaded metal conduit, for general purpose wiring. The hubs are tapped with tapered threads, so rigid or IMC with threaded ends is what mates with it, not EMT with compression fittings. Each hub-type box also has a smooth, rounded integral bushing to keep conductor insulation off a sharp edge as wire is pulled through.
5) Can the GRJX75 be installed outdoors in a wet or corrosive area?
Yes. The GRJ box is raintight and the malleable iron body carries a triple-coat finish: zinc electroplate, then chromate, then epoxy powder coat. That stack is what gives it corrosion resistance for outdoor conduit runs, wet locations, and petrochemical or marine facilities.
6) Do I need to add a grounding lug to the GRJ outlet box?
No. An internal ground screw is furnished in the box. The hub threads are accurately tapped and tapered, which produces rigid joints and reliable ground continuity through the conduit system itself.
7) Why use an explosionproof outlet box like the GRJ instead of a standard conduit body?
A GRJ box is used where the conduit run passes through a classified area and the enclosure itself has to contain an ignition source: Class I Division 1 and 2 Groups C and D, Class II Division 1 and 2 Groups E, F and G, and Class III. A standard conduit body gives you the same directional change and pull access but no explosionproof or dust-ignitionproof rating. In an unclassified dry interior, the GRJ is more box than the job needs.
8) Is the GRJ box strong enough for an area where it may get knocked?
Malleable iron is the body material, chosen for high tensile strength and ductility with resistance to impact and shock as well as corrosion. That is why these show up on exposed runs in industrial plants rather than a die-cast or plastic box.
9) What is the exact part number to order for the Appleton four-hub GRJ box?
The manufacturer part number is GRJX75, an Appleton GRJ Series malleable iron explosionproof conduit outlet box in the four-hub cross body style.
How fast can I get the Appleton GRJX75 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 GRJX75 come with a warranty?
Absolutely. The Appleton GRJX75 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 GRJX75?
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 GRJX75 from ZenSupply?
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