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RACO 201 4 in. Square Steel Extension Ring, Drawn, 1-1/2 in. Deep
The RACO 201 4 in. Square Steel Extension Ring, Drawn, 1-1/2 in. Deep is a drawn steel extension ring engineered to add depth and wiring capacity to existing 4 in. square conduit boxes without requiring a full box replacement. Built for conduit wiring systems, this UL Listed extension ring features twelve 1/2 in. knockouts (KO's) for flexible conduit entry from multiple sides, and its no-bracket design allows it to mount directly onto an existing 4 in. square box. The one-piece drawn steel body provides the strength and durability required for commercial and industrial electrical rough-in work.
Key Features
- Trade Size: 4 in. square extension ring sized to match standard 4 in. square conduit boxes.
- Depth: 1-1/2 in. deep, adding usable wiring volume without swapping out the existing box.
- Durable Construction: Drawn steel, one-piece body for strength and long-term durability in conduit installations.
- Twelve 1/2 in. Knockouts: Twelve 1/2 in. KO's provide multiple, flexible conduit entry points around the ring.
- Wiring System: Designed for use in conduit wiring systems.
- Bracket Type: No Bracket, allowing direct mounting to an existing 4 in. square box.
- Shape: Square profile matches standard 4 in. square box footprints for a clean fit.
Certifications & Compliance
- UL Listed
Technical Specifications
- Product Type: Steel Box
- Product Size: 4 in
- Product Depth: 1.5 in
- Product Shape: Square
- Drawn or Welded: Drawn
- Bracket Type: No Bracket
- Wiring System: Conduit
- Knockouts: 1/2 in
- Certified Listed: UL Listed
Typical Applications
- Extending the Depth of Existing 4 in. Square Conduit Boxes
- Commercial and Industrial Conduit Wiring Systems
- Remodel and Retrofit Electrical Installations
- Junction and Outlet Box Depth Extensions
- New Construction Rough-In Electrical Work
Why RACO?
RACO builds the 201 Extension Ring from drawn steel for a durable, one-piece construction that holds up to the demands of conduit rough-in work. With twelve 1/2 in. knockouts for flexible conduit routing and UL Listed certification, this extension ring gives electrical professionals a code-compliant, reliable way to extend an existing 4 in. square box without a full replacement.
Manufacturer Resources
Spec Sheet
Product Specs
- list_batch:
- RACO-20260916
- Product Type:
- Box Extension Ring
- Product Size:
- 4 in
- Product Depth:
- 1.5 in
- Product Shape:
- Square
- Drawn or Welded:
- Drawn
- Bracket Type:
- No Bracket
- Wiring System:
- Conduit
- Knockouts:
- 1/2 in
- Certified Listed:
- UL Listed
- Department:
- Electrical
- Product Subgroup:
- Electrical Boxes
- Product Group:
- Boxes & Enclosures
RACO RACO201 – Frequently Asked Questions
1) Will the RACO 201 extension ring fit a standard 4 in. square box?
Yes. The RACO 201 is a 4 in. square extension ring with a square profile, sized to sit directly on the footprint of a standard 4 in. square box. It uses a no-bracket design so it mounts straight to the existing box rather than to framing.
2) How much depth does the RACO 201 add to an existing box?
It adds 1-1/2 inches of depth. That extra volume is what lets you keep an existing 4 in. square box in the wall or ceiling when you have added conductors or devices and run out of room, instead of cutting the box out and replacing it.
3) Can a Steel City SBEX switch box extension be used in place of the RACO 201 extension ring?
No, they fit different box footprints. The RACO 201 is a 4 in. square extension ring, 1-1/2 in. deep, with square shape matched to a 4 in. square box and twelve 1/2 in. knockouts for conduit entry. The Thomas & Betts SBEX is an adjustable 1-gang switch box extension of 3.5 cu. in. in pre-galvanized steel, sized for a single-gang switch box opening. Use the 201 when the existing box is 4 in. square; use a 1-gang extension when the existing box is a single-gang switch box.
4) Is the RACO 201 extension ring UL Listed for commercial electrical work?
The 201 is UL Listed. It is built for conduit wiring systems, which is the typical commercial and industrial rough-in application.
5) Which extension gives more added wiring volume, the RACO 201 or a 1-gang box extension?
The RACO 201 adds a full 1-1/2 in. of depth across a 4 in. square footprint, so the added volume follows the larger square opening. The Thomas & Betts SBEX adds 3.5 cu. in. over a single-gang opening. Match the extension to the box you already have in the wall rather than to the volume figure alone.
6) Is the RACO 201 drawn or welded steel, and does it matter?
Drawn. The body is formed from one piece of steel rather than welded from panels, so there are no seams at the corners. For conduit rough-in where the ring takes handling abuse on the job, that one-piece body is the practical difference.
7) What is the RACO part number to order for a 1-1/2 in. deep 4 in. square extension ring?
Order RACO 201. That is the manufacturer part number for the 4 in. square, 1-1/2 in. deep drawn steel extension ring, and RACO publishes a spec sheet for it at hubbellcdn.com/specsheet/RACO-201-SPEC-EN.pdf.
8) Does the RACO 201 come with a cover or mounting screws?
The 201 is the extension ring itself. A cover or device plate to close the assembly, and any raised cover you need for the device, are separate items, as is the hardware to tie the ring to the existing box.
How fast can I get the RACO RACO201 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the RACO RACO201 come with a warranty?
Absolutely. The RACO RACO201 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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