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RACO 257 4-11/16 in. Welded Square Steel Box, 2-1/8 in. Deep, Raised Ground
Model: RACO-257
RACO 257 4-11/16 in. Welded Square Steel Box, 2-1/8 in. Deep, Raised GroundThe RACO 257 is a 4-11/16 in. welded square steel box engineered for conduit-based electrical wiring systems in commercial...
RACO
$9.63
RACO 258 4-11/16 in. Square Steel Box, Welded, 2-1/8 in. Deep, Raised Ground
The RACO 258 is a 4-11/16 in. welded square steel box built for conduit-fed commercial and industrial electrical wiring systems. Measuring 2-1/8 in. deep, this steel enclosure features a raised ground for dependable equipment grounding and is UL Listed for code-compliant installation. Its welded-seam construction and mix of one 1/2 in., eight 1 in., and three 1/2 - 3/4 in. combination TKO knockouts make the RACO 258 a versatile enclosure for splices, terminations, and device mounting in conduit raceway systems.
Key Features
- Trade Size: 4-11/16 in. square footprint sized to accept standard covers, rings, and device mounting hardware.
- Depth: 2-1/8 in. deep interior provides ample volume for conductors, splices, and devices.
- Durable Construction: Welded steel body forms a rigid, seam-welded enclosure built to withstand demanding job-site conditions.
- Conduit Wiring System: Designed for conduit-fed installations, integrating with standard rigid, IMC, and EMT raceway runs.
- Knockouts: Includes one 1/2 in., eight 1 in., and three 1/2 - 3/4 in. combination TKO knockouts for flexible conduit entry sizing.
- Raised Ground: Integrated raised ground feature simplifies equipment grounding conductor termination and bonding.
- No Bracket: Supplied without a mounting bracket for direct, conduit-supported installation.
Certifications & Compliance
- UL Listed
Technical Specifications
- Product Type: Steel Box
- Product Size: 4-11/16 in
- Product Depth: 2.125 in
- Product Shape: Square
- Drawn or Welded: Welded
- Bracket Type: No Bracket
- Wiring System: Conduit
- Knockouts: 1/2 in;1 in;1/2 - 3/4 in Combination (TKO)
- Certified Listed: UL Listed
Typical Applications
- Conduit-Fed Electrical Wiring Systems
- Commercial and Industrial Construction
- Junction and Pull Box Installations
- Device and Switch Mounting Enclosures
- New Construction and Renovation Projects
Why RACO?
RACO steel boxes are engineered for electricians who need dependable, code-compliant enclosures on every job. The welded-seam construction and raised ground design of the RACO 258 deliver a rugged, UL Listed solution for conduit wiring systems, while the combination of 1/2 in., 1 in., and TKO knockouts offers flexibility across a range of conduit sizes and installation scenarios.
Manufacturer Resources
Spec Sheet
Product Specs
- list_batch:
- RACO-20260916
- Product Type:
- Outlet Box
- Product Size:
- 4-11/16 in
- Product Depth:
- 2.125 in
- Product Shape:
- Square
- Drawn or Welded:
- Welded
- Bracket Type:
- No Bracket
- Wiring System:
- Conduit
- Knockouts:
- 1/2 in;1 in;1/2 - 3/4 in Combination (TKO)
- Certified Listed:
- UL Listed
- Department:
- Electrical
- Product Subgroup:
- Electrical Boxes
- Product Group:
- Boxes & Enclosures
RACO RACO258 – Frequently Asked Questions
1) What conduit sizes will the RACO 258 square box accept?
Knockouts on the RACO 258 cover one 1/2 in., eight 1 in., and three 1/2 - 3/4 in. combination TKO openings. That means you can land 1/2 in., 3/4 in., or 1 in. rigid, IMC, or EMT without a reducing washer, and the eight 1 in. openings give you plenty of room for multiple feeders through a pull or junction point. The TKO combination knockouts let you pop just the inner ring for 1/2 in. or the full ring for 3/4 in.
2) Does the RACO 258 come with a mounting bracket, or do I have to support it off the conduit?
No bracket is supplied with the 258. It is built for conduit-supported mounting or fastening through the box to a surface or structural member, which is how these 4-11/16 in. welded boxes are normally set in commercial raceway work. If you need a box that nails or screws to a stud face, specify a bracketed version instead.
3) Will standard 4-11/16 in. covers and plaster rings fit the RACO 258?
Yes. The 258 is a 4-11/16 in. square box, the standard trade footprint, so it takes off-the-shelf 4-11/16 in. flat covers, device rings, and extension rings. Keep in mind that the box itself is 2-1/8 in. deep, so your ring depth has to be chosen for your finished wall thickness, not for box volume.
4) I need a box for NM cable in a wood-framed building. Is the RACO 258 the right choice?
Probably not as supplied. The 258 is specified for conduit wiring systems and comes with knockouts and no bracket, so it is set up for raceway entry and conduit or surface support. For nonmetallic cable in wood framing you want a box with cable clamps and a nailing bracket, or you need to add listed cable connectors at the knockouts and provide your own support.
5) What does the raised ground on the RACO 258 do, and do I still need a grounding screw?
The raised ground is an integrated, tapped boss in the box that gives you a dedicated landing point for the equipment grounding conductor and bonding jumpers, so you are not hunting for a knockout to install a clip. It is part of the box as built on the 258, which keeps grounding terminations off the device yoke and makes the bond easy to inspect.
6) Is a welded box like the RACO 258 better than a drawn box for a wet or dusty job?
Welded is what the 258 is, and the difference is practical rather than ratings-based: a drawn box is formed from one piece with no seam, while a welded box like this one is seam-welded into a rigid body, which is how the deeper 2-1/8 in. 4-11/16 in. boxes are typically built to stay square under conduit loading. For damp, wet, or dust-tight locations you want a gasketed enclosure rated for that environment, not a standard steel box with knockouts.
7) Can I use the RACO 258 as a pull box or junction box on a commercial conduit run?
That is one of its main uses. At 4-11/16 in. square and 2-1/8 in. deep with eight 1 in. knockouts, the 258 gives room for splices, terminations, and pulling multiple conduits through a single point, and it is also used as a device or switch enclosure with the right ring. It is UL Listed for code-compliant installation in conduit-fed commercial and industrial systems.
8) Is the RACO 258 UL Listed for a job that requires listed enclosures?
Yes, the 258 square steel box is UL Listed. For specification submittals, the Hubbell/RACO spec sheet for the 258 is published at https://hubbellcdn.com/specsheet/RACO-258-SPEC-EN.pdf.
9) What is the exact RACO part number to order for the 4-11/16 in. welded box with raised ground?
Order RACO model 258. That is the 4-11/16 in. square welded steel box, 2-1/8 in. deep, raised ground, no bracket, for conduit wiring systems.
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Does the RACO RACO258 come with a warranty?
Absolutely. The RACO RACO258 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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