RACO 256 3-3/4 in. Square Box, Large Capacity Welded Steel, 3-1/2 in. Deep

RACO 256 3-3/4 in. Square Box, Large Capacity Welded Steel, 3-1/2 in. Deep

The RACO 256 3-3/4 in. Square Box is a large capacity, welded steel enclosure engineered for durable electrical rough-in installations in commercial and industrial construction. Measuring 3-1/2 in. deep, this square box features seventeen knockouts — sixteen 1/2 in. and 3/4 in. concentric knockouts plus one additional 1/2 in. knockout — giving installers flexible conduit entry from multiple directions without extra reducing washers. Part of RACO's Steel Boxes and Covers product line, the fully welded steel construction is UL Listed, delivering the strength and code compliance electrical professionals require for demanding wiring projects.

Key Features

• Box Size: 3-3/4 in. square box design provides ample interior room for splicing conductors, mounting devices, and making secure connections in tight rough-in spaces.
• Large Capacity: The large-capacity interior volume accommodates additional conductors, devices, and wiring compared to a standard-depth square box, reducing the need for box fill extensions.
• Welded Steel Construction: Fully welded seams eliminate gaps and deliver rugged, long-lasting durability suited to demanding commercial and industrial job sites.
• Depth: 3-1/2 in. deep profile supports larger wire fills, additional device mounting, and easier wire management during installation.
• Seventeen Knockouts: Sixteen 1/2 in. and 3/4 in. concentric knockouts plus one additional 1/2 in. knockout simplify conduit entry from multiple directions and conduit sizes.
• Concentric Knockout Design: Concentric 1/2 in. and 3/4 in. knockouts let installers select the exact conduit size needed without carrying separate reducing washers.
• UL Listed: Certified for safe, code-compliant installation in commercial and industrial applications.

Certifications & Compliance

• UL Listed

Technical Specifications

• Product Type: Steel Boxes and Covers
• Product Depth: 3.5 in
• Knockouts: 1/2 in; 1/2 - 3/4 in Concentric
• Certified Listed: UL Listed

Typical Applications

• Commercial and Industrial Electrical Installations
• Junction and Pull Box Wiring
• New Construction and Renovation Projects
• Conduit Routing and Device Mounting

Why RACO?

RACO's fully welded steel construction and UL Listed certification reflect a longstanding commitment to rugged, code-compliant electrical products built for the realities of the jobsite. The 256 square box's large capacity, 3-1/2 in. depth, and seventeen-knockout configuration make it a dependable choice for electricians who need a durable enclosure that installs quickly, accepts multiple conduit sizes, and performs reliably over the life of the installation.