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RACO 243 BOX-LOC 4 in. Square Welded Steel Box, MS Bracket
The RACO 243 is a 4 in. square welded steel box from RACO's BOX-LOC series, engineered for flush installation in metal stud framing applications. Measuring 2-1/8 in. deep, this steel box features an MS bracket designed specifically for metal studs, along with built-in AC/MC/Flex clamps that accept Armored Cable, Metal-Clad (MC), and Flexible conduit wiring systems. Four knockouts, including 1/2 in. and 1/2 - 3/4 in. combination (TKO) sizes, provide flexible wiring options, and the box is UL Listed for code-compliant installations in commercial and residential electrical systems. Designed for use in commercial and residential construction, the 243 delivers a compact, code-compliant enclosure for switches, receptacles, and junction connections in metal-framed walls.
Key Features
- Trade Size: 4 in. square box body sized for standard electrical box and device installations.
- Durable Construction: Welded steel construction, 2-1/8 in. deep, for a rigid, long-lasting enclosure.
- Integrated AC/MC/Flex Clamps: Built-in clamps accommodate Armored Cable, Metal-Clad (MC), MCI-A, and Flexible conduit wiring systems without separate connectors.
- Four Knockouts: Includes 1/2 in. and 1/2 - 3/4 in. combination (TKO) knockouts for flexible field wiring configurations.
- MS Bracket: Mounting bracket engineered for metal stud framing, supporting flush installation.
- BOX-LOC® Series: Part of RACO's BOX-LOC series of steel outlet boxes designed for fast, secure installation.
Certifications & Compliance
- UL Listed
- Rated for Armored Cable, Metal-Clad, and Flexible Conduit Wiring Systems
Technical Specifications
- Product Type: Steel Box
- Product Size: 4 in
- Product Depth: 2.125 in
- Product Shape: Square
- Drawn or Welded: Welded
- Bracket Type: MS, for Metal Studs
- Wiring System: Armored Cable/Metal Clad/MCI-A/Flex
- Knockouts: 1/2 in;1/2 - 3/4 in Combination (TKO)
- Series: BOX-LOC® Series
- Certified Listed: UL Listed
Typical Applications
- Commercial and Residential Electrical Installations
- Metal Stud Wall Framing Applications
- Armored Cable, MC, and Flexible Conduit Wiring Systems
- New Construction and Renovation Projects
- Flush-Mount Junction and Device Box Installations
Why RACO?
RACO builds the 243 with welded steel construction and an MS bracket engineered for reliable, flush mounting in metal stud walls. Integrated AC/MC/Flex clamps and UL Listing make this BOX-LOC series box a dependable choice for electricians who need code-compliant, ready-to-install outlet boxes. With its BOX-LOC series design and UL Listing, the RACO 243 helps installers meet code requirements while simplifying rough-in wiring for AC, MC, and flexible conduit systems.
Manufacturer Resources
Spec Sheet
Product Specs
- list_batch:
- RACO-20260916
- Product Type:
- Outlet Box
- Product Size:
- 4 in
- Product Depth:
- 2.125 in
- Product Shape:
- Square
- Drawn or Welded:
- Welded
- Bracket Type:
- MS, for Metal Studs
- Wiring System:
- Armored Cable/Metal Clad/MCI-A/Flex
- Knockouts:
- 1/2 in;1/2 - 3/4 in Combination (TKO)
- Series:
- BOX-LOC® Series
- Certified Listed:
- UL Listed
- Department:
- Electrical
- Product Subgroup:
- Electrical Boxes
- Product Group:
- Boxes & Enclosures
RACO RACO243 – Frequently Asked Questions
1) Will the RACO 243 box mount to metal studs, or do I need wood framing?
Metal studs are exactly what it's built for. The 243 comes with an MS bracket engineered for metal stud framing, so it screws to the stud face and sets the box for flush mounting with the finished wall. On wood framing you'd want a box with a nail-on or FS-type bracket instead.
2) Can I land MC cable in the RACO 243 without buying connectors?
Yes. The 243 has integral clamps rated for Armored Cable, Metal-Clad, MCI-A, and flexible conduit, so AC and MC runs land directly in the box with no separate connector at the clamp. If you're pulling THHN in EMT instead, you'd use the knockouts with the appropriate EMT connector.
3) What size conduit can I run into the RACO 243?
The box has 1/2 inch knockouts plus 1/2 to 3/4 inch combination (TKO) knockouts, so you can take 1/2 inch trade size directly or step a TKO out to 3/4 inch where you need the larger raceway. Four knockouts total.
4) Is the RACO 243 UL Listed for commercial work?
It's UL Listed, and rated for armored cable, metal-clad, and flexible conduit wiring systems. That covers the typical commercial metal stud rough-in where an inspector wants a listed enclosure with listed cable clamps.
5) Does the RACO 243 come with a cover or device ring?
The 243 is the box body with the MS bracket and clamps. A 4 inch square box needs a separate cover or raised device ring sized to your wall finish depth to take a switch, receptacle, or blank plate, so order that ring with the box.
6) Welded versus drawn steel box, which should I use?
The 243 is welded. A drawn box is formed from one piece and has no seams, which some specs prefer; a welded box like this one is assembled from flat stock and welded, which is what allows the deeper 2-1/8 inch body and the integral clamps. For device and junction work in metal stud walls, welded is the standard choice.
How fast can I get the RACO RACO243 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 RACO RACO243 come with a warranty?
Absolutely. The RACO RACO243 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 RACO RACO243?
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installation tips, and troubleshooting. Contact Us
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