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RACO 235 4 in. Welded Square Outlet Box, 2-1/8 in. Deep, TS Bracket
The RACO welded 4 in. square steel outlet box is built for demanding commercial and residential electrical rough-in work, combining a rugged welded steel body with a generous 2-1/8 in. deep interior for ample wiring capacity. Designed for conduit wiring systems, this box is equipped with eight 1/2 in. knockouts and five 1/2 - 3/4 in. combination knockouts (TKO) to accommodate a variety of conduit sizes and entry points. A TS bracket allows for fast, secure mounting to metal or wood studs, and the box is designed for flush installation. This box is UL Listed, giving electricians and contractors confidence in code-compliant performance on every job.
Key Features
- Trade Size: 4 in. square steel box sized for standard junction and device box installations.
- Durable Construction: Welded steel body construction delivers superior strength and long-term durability compared to drawn boxes.
- Depth: 2-1/8 in. deep body provides generous interior volume for conductors, devices, and connections.
- Knockouts: Eight 1/2 in. knockouts and five 1/2 - 3/4 in. combination knockouts (TKO) provide flexible conduit and cable entry options.
- Bracket: TS bracket is designed for quick, secure mounting to metal or wood studs.
- Mounting: Flush mounting configuration provides a clean, code-compliant finished installation.
- Wiring System: Rated for use with conduit wiring systems in commercial and residential applications.
Certifications & Compliance
- UL Listed
Technical Specifications
- Product Type: Steel Box
- Product Size: 4 in
- Product Depth: 2.125 in
- Product Shape: Square
- Drawn or Welded: Welded
- Bracket Type: TS, for Metal or Wood Studs
- Wiring System: Conduit
- Knockouts: 1/2 in;1/2 - 3/4 in Combination (TKO)
- Certified Listed: UL Listed
Typical Applications
- Commercial and Residential Electrical Rough-In
- Junction and Device Box Installations
- Metal and Wood Stud Wall Framing
- Conduit Wiring Systems
- New Construction and Remodel Projects
Why RACO?
RACO welded steel boxes are engineered for the rigors of professional electrical installation, pairing rugged welded construction with a TS bracket for dependable stud mounting in metal or wood-framed walls. UL Listed for conduit wiring systems, this 4 in. square box with its 2-1/8 in. deep body and combination of 1/2 in. and 1/2 - 3/4 in. TKO knockouts gives electrical contractors a reliable, code-compliant solution for rough-in work on commercial and residential projects.
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:
- TS, for Metal or Wood Studs
- Wiring System:
- Conduit
- Knockouts:
- 1/2 in;1/2 - 3/4 in Combination (TKO)
- Certified Listed:
- UL Listed
- Department:
- Electrical
- Product Subgroup:
- Electrical Boxes
- Product Group:
- Boxes & Enclosures
RACO RACO235 – Frequently Asked Questions
1) Will the RACO 235 square box mount to metal studs, or is it wood framing only?
Both. The RACO 235 comes with a TS bracket rated for metal or wood studs, so the same box works in steel-framed commercial partitions and wood-framed walls without changing hardware. The bracket sets the box for flush mounting at the face of the finished wall.
2) What conduit sizes can I run into the RACO 235 4 in. square box?
The 235 has eight 1/2 in. knockouts plus five 1/2 - 3/4 in. combination knockouts (TKO), so you can land either 1/2 in. or 3/4 in. trade size conduit. The combination knockouts let you pop the larger ring only where a 3/4 in. run comes in and leave the rest at 1/2 in.
3) Will the RACO 235 work outdoors or in a wet location?
No. It is a flush-mount steel box with a stud bracket for in-wall rough-in, not a weatherproof enclosure. For an exposed exterior device, look at the Mulberry Royal Mountie weatherproof die-cast aluminum 1-gang box; for exposed conduit with threaded hubs, the Thomas & Betts 2IH3-1 Red-Dot 2-gang box with three 1/2 in. hubs.
4) Do I need to order a cover separately for the RACO 235 square box?
Yes. The 235 is the box and bracket only. A 4 in. square box takes a separate square cover, either a flat blank for a junction or a raised device ring sized to your wall thickness when you are mounting a receptacle or switch. Pick the ring depth to bring the device flush with the finished surface.
5) What box should be used instead of the RACO 235 in a hazardous or classified location?
The RACO 235 is a welded steel 4 in. square box for conduit wiring systems, UL Listed, and intended for ordinary commercial and residential rough-in. For a classified area, Appleton's explosionproof malleable iron conduit outlet boxes cover that duty instead: the GRJ Series explosionproof conduit outlet box and the GRJS Series universal explosionproof box are both malleable iron. Use the Appleton body where the drawing calls out an explosionproof enclosure, and the RACO 235 where a standard steel box is specified.
6) For an outdoor receptacle, can the RACO 235 be used or is a weatherproof box needed?
The RACO 235 is a welded steel box with knockouts, configured for flush mounting in stud walls on conduit systems - an interior rough-in box. For a wet-location receptacle, the Mulberry Royal Mountie weatherproof outlet box is the 1-gang die-cast aluminum option built for that exposure. Keep the 235 inside the building envelope and use the Royal Mountie where the device is exposed to weather.
7) What is the difference between a welded box like the RACO 235 and a drawn box?
A drawn box is formed from one piece of steel; a welded box like the 235 is assembled and welded, which is how RACO gets a full 2-1/8 in. depth in a 4 in. square footprint and keeps corners square under rough handling on a rough-in. Drawn boxes are generally limited to shallower depths.
8) Can the RACO 235 be used as a junction box rather than a device box?
Yes, it is used both ways. With thirteen total knockout locations and 2-1/8 in. of depth, it handles a multi-run junction with a blank cover, or takes a device ring for a receptacle or switch. For hazardous locations that is not the right choice, and you would move to a malleable iron explosionproof box such as the Appleton GRJ or GRJS Series.
9) Which RACO model number do I order for the 4 in. square welded box with the TS bracket?
Order RACO 235. That part number is the 4 in. square welded steel box, 2-1/8 in. deep, with the TS stud bracket.
How fast can I get the RACO RACO235 delivered?
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Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
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Does the RACO RACO235 come with a warranty?
Absolutely. The RACO RACO235 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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