Thomas & Betts CX Steel City A...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$12.86
Thomas & Betts CX Steel City Adjust-A-Box, Pre-Galvanized Steel 1-Gang Gangable Switch Box, 2-Inch x 3-Inch x 3-1/2-Inch, 18-Cubic-Inch

Thomas & Betts CX Steel City Adjust-A-Box, Pre-Galvanized Steel 1-Gang Gangable Switch Box, 2-Inch x 3-Inch x 3-1/2-Inch, 18-Cubic-Inch

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Model: TBCX

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

$12.86
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Thomas & Betts CX Steel City Adjust-A-Box, Pre-Galvanized Steel 1-Gang Gangable Switch Box

Thomas & Betts brings the CX Steel City Adjust-A-Box to professional electricians and contractors who need a dependable, code-ready device box for switch and receptacle installations. Constructed from pre-galvanized steel, this 1-gang gangable switch box measures 2-Inch x 3-Inch x 3-1/2-Inch with an 18-Cubic-Inch interior capacity, giving installers ample room for wiring, devices, and connectors. Its gangable design lets multiple boxes be joined side-by-side for multi-device wall openings, while the Steel City Adjust-A-Box construction is built to accept BX/armored cable connections, giving crews a flexible, GEM-style box for everyday rough-in work.

Key Features

  • Compact Dimensions: Overall size of 2-Inch x 3-Inch x 3-1/2-Inch fits standard wall stud spacing for switch and outlet installations.
  • 18-Cubic-Inch Capacity: Generous interior volume accommodates device wiring, conductors, and connectors without overcrowding the box.
  • Pre-Galvanized Steel Construction: Corrosion-resistant pre-galvanized steel body withstands jobsite handling and long-term service in the wall.
  • 1-Gang Gangable Design: Ganging tabs allow this box to be combined with additional units for two-, three-, or multi-device wall openings.
  • Steel City Adjust-A-Box: The Adjust-A-Box design helps installers align the box face with varying wall and finish thicknesses during rough-in.
  • BX Cable Compatible: Built to accept BX/AC armored cable connections for flexible wiring methods in residential and light commercial work.
  • GEM-Style Box Profile: Standard GEM (handy) box shape is compatible with common switches, receptacles, and matching wallplates.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Residential and Light Commercial Wiring
  • Switch and Receptacle Installations
  • New Construction Rough-In
  • Wall-Mounted Device Box Installations
  • Multi-Gang Device Assemblies
  • BX/Armored Cable Wiring Systems

Why Thomas & Betts?

Thomas & Betts, manufacturer of the trusted Steel City product line, builds the CX Adjust-A-Box from pre-galvanized steel for long-lasting, corrosion-resistant performance in demanding electrical installations. The 1-gang gangable, BX-ready design gives electricians a flexible box solution that can be configured on site for single- or multi-device wall openings. Choose Thomas & Betts for reliable, code-compliant device boxes built to withstand daily jobsite use from rough-in through final trim.

Manufacturer Resources

Product Specs

list_batch:
TB-20260918
Product Type:
Switch Box
Department:
Electrical
Product Subgroup:
Electrical Boxes
Product Group:
Boxes & Enclosures
Application:
For use with armored/metal clad cable
Product Color:
Silver
Standards:
UL E2969
Product Material:
Steel

Steel City TBCX – Frequently Asked Questions

1) Is the Steel City CX switch box big enough for a switch and two 12-gauge cables?
The CX gangable switch box has an 18 cubic inch interior, which is the number you use for NEC box fill. At 2 x 3 x 3-1/2 inches overall it is a deep single-gang device box, so there is room for the device, the conductors, and the connectors without crowding.
2) Can I join Steel City CX boxes together for a two or three gang opening?
Yes. The CX is a gangable box, with ganging tabs that let you remove a side and join additional units for two, three, or more device openings in the same wall cut.
3) Will the Thomas & Betts CX box take BX / MC armored cable?
It is made for armored and metal clad cable. The box accepts BX/AC connections, which is why it is spec'd for residential and light commercial work where MC is the wiring method. For NM cable runs, a box with integral NM clamps or a plastic box is the better choice.
4) Is pre-galvanized steel OK for a damp location or an exterior wall?
The CX is a pre-galvanized steel box, corrosion resistant for interior in-wall service, not a weatherproof box. For an outdoor or wet location single-gang device, use a weatherproof box such as the Mulberry Royal Mountie die-cast aluminum 1-gang. For hazardous locations, Appleton's GRJ Series explosionproof malleable iron boxes are the type to specify.
5) Is there a nonmetallic equivalent to the Thomas and Betts CX gangable switch box?
Yes. The Cantex EZ Box is a PVC multi-gang residential outlet box, which covers the same kind of multi-device wall opening the CX handles by ganging steel boxes together. The difference is the wiring method: the CX is built to accept BX/armored cable connections, while the Cantex EZ is a PVC body typically used with nonmetallic cable.
6) What should I use instead of the Steel City CX switch box for an outdoor wet-location receptacle?
The CX is a pre-galvanized steel device box intended for residential and light commercial rough-in inside the wall, so it is not the box for an exposed exterior device. For that, the Mulberry Royal Mountie weatherproof outlet box is a 1-gang die-cast aluminum box built for weatherproof service. Both give you a single-gang device opening, but the Royal Mountie is the aluminum weatherproof body while the CX is the in-wall steel box.
7) Can I use the Steel City CX box in a hazardous or classified area?
No - the CX is a pre-galvanized steel device box for residential and light commercial switch and receptacle work. Classified areas call for an explosionproof enclosure such as the Appleton GRJ Series explosionproof conduit outlet box or the Appleton GRJS Series universal explosionproof box, both malleable iron. Those are conduit outlet bodies rather than gangable device boxes, so the device mounting and wiring method differ from the CX.
8) Is the Steel City CX box UL listed?
Yes, it carries UL file E2969. That is the listing a UL-required device box needs on an inspected rough-in.
9) Do standard switches, receptacles and wallplates fit this box?
Yes. The CX uses the standard GEM (handy) box profile, so common switches, receptacles, and matching single-gang wallplates mount to it without adapters.
10) What does Adjust-A-Box mean on the Steel City CX?
The Adjust-A-Box design lets the installer align the box face with the finished wall surface during rough-in, so varying drywall or panel thicknesses don't leave the device set too deep or proud.
11) Can I use the CX box with conduit instead of cable?
The CX is specified for armored and metal clad cable. If your run is rigid or EMT conduit and you want a hubbed box, a conduit outlet box like the Thomas & Betts Red-Dot 2IH3-1 with three 1/2 inch hubs is the right type for that connection.
12) I need a box with threaded conduit hubs instead of cable clamps - what is the Thomas and Betts alternative to the CX?
The CX is set up for BX/AC armored cable connections and gangs side to side for multi-device openings. If the run is rigid conduit, the Thomas and Betts 2IH3-1 Red-Dot box is a 2-gang conduit outlet box with three 1/2-inch hubs, sold in packs of 100. It gives you threaded hub entries and a fixed 2-gang body rather than the CX's single-gang gangable steel shell.
13) Will the Steel City CX box work for a range or dryer outlet?
It is not the right box for that. The CX is a 2-inch x 3-inch x 3-1/2-inch, 18-cubic-inch 1-gang box sized for standard switches and receptacles. A range or dryer termination uses a dedicated box such as the Pass and Seymour P242RRD range and dryer box in thermoplastic, which is built around that appliance receptacle rather than a standard device opening.
14) How do I order the Steel City CX box - what is the part number?
It is ordered as Thomas & Betts / Steel City model CX, a single configuration: 1-gang gangable pre-galvanized steel switch box, 2 x 3 x 3-1/2 inches, 18 cubic inch. There are no finish or size options to select.
15) What is the difference between the Steel City CX box and a round conduit outlet box like the Appleton GRT75?
The CX is a rectangular GEM-style 1-gang device box in pre-galvanized steel that mounts switches, receptacles, and matching wallplates and gangs for multi-device openings. The Appleton GRT75 is a malleable iron round conduit outlet box - a round body for conduit runs and splices rather than a ganged wall device box. Pick the CX when a flush-mounted device and wallplate are the goal.
How fast can I get the Steel City TBCX 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 Steel City TBCX come with a warranty?
Absolutely. The Steel City TBCX 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 Steel City TBCX?
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 Steel City TBCX from ZenSupply?
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