Thomas & Betts 233 4" Square Outlet/Junction Box, Dual 1" Knockouts

Thomas & Betts 233 4" Square Outlet/Junction Box, Dual 1" Knockouts

The Thomas & Betts 233 is a 4" square outlet box engineered for junction and outlet wiring applications across commercial, industrial, and residential electrical installations. Featuring two 1" knockouts, this box delivers convenient, code-friendly access points for conduit or cable entry during rough-in wiring. Electrical contractors specify 4" square outlet boxes like the Thomas & Betts 233 for splicing conductors, mounting switches and receptacles, and housing wiring connections behind fixtures and devices. Sized to standard 4" square dimensions, this box integrates easily with common covers, mud rings, and mounting brackets used throughout the trade. As one of the most widely specified box sizes in the industry, the 233 offers ample interior volume for wire splices, device mounting, and future wiring modifications.

Key Features

• 4" Square Footprint: Standard 4" square outlet box sizing for compatibility with common covers, mud rings, and device plates used in everyday installations.
• Dual 1" Knockouts: Two 1" knockouts provide ready access points for conduit or cable entry, simplifying rough-in wiring and reducing on-site fabrication.
• Simplified Rough-In: Pre-formed 1" knockouts let installers open only the entry points needed for the job, keeping unused knockouts intact for future flexibility.
• Junction & Outlet Versatility: Suitable for use as a junction box or outlet box for splicing conductors and mounting switches, receptacles, and fixtures.
• Compact, Code-Friendly Design: The 4" square profile fits standard wall cavities and framing, making it a practical choice for both new construction and retrofit wiring.
• Thomas & Betts Reliability: Manufactured by Thomas & Betts, a recognized name in electrical distribution products trusted by professional electricians.

Technical Specifications

• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Junction Box for Splicing Conductors
• Outlet Box for Switches and Receptacles
• Conduit and Cable Entry via 1" Knockouts
• Commercial and Residential Electrical Rough-In
• New Construction and Renovation Wiring Projects

Why Thomas & Betts?

Thomas & Betts is a trusted manufacturer of electrical boxes, fittings, and connectors used by professional electricians on commercial and residential projects. The 233 4" square outlet box reflects the brand's focus on practical, code-friendly box designs that simplify rough-in wiring with convenient 1" knockouts for conduit or cable entry, and consistent box dimensions that reduce guesswork during layout. Choose the Thomas & Betts 233 for a dependable electrical box built for everyday installation work on job sites where reliable, standard-sized boxes speed up rough-in and reduce field errors.