RACO 243 BOX-LOC 4 in. Square Welded Steel Box, MS Bracket

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.