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RACO 207 4 in. Square Extension Ring, Welded Steel, 2-1/8 in. Deep
The RACO 207 is a 4 in. square extension ring engineered to extend the depth of an existing outlet box, adding usable interior volume for conductors, devices, and conduit connections. Built with welded steel box construction, this extension ring measures 2-1/8 in. deep and includes six 1/2 in. and six 3/4 in. knockouts for flexible conduit entry in commercial and residential wiring systems. The RACO 207 is UL Listed, giving electrical contractors a code-compliant solution for expanding box capacity without replacing the existing enclosure.
Key Features
- 4 in. Square Design: Matches standard 4 in. square box dimensions for a seamless fit when extending existing installations.
- 2-1/8 in. Deep: Adds significant interior volume to accommodate additional wiring, devices, or conduit fill.
- Welded Steel Construction: Durable welded steel box body resists deformation and provides long-term structural integrity.
- Six 1/2 in. and Six 3/4 in. Knockouts: Multiple knockout sizes support flexible conduit entry points for a variety of conduit wiring system layouts.
- No Bracket Configuration: Designed without a mounting bracket for direct box-to-box extension applications.
- Square Shape: Standard square profile compatible with common 4 in. square box and cover accessories.
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: No Bracket
- Wiring System: Conduit
- Knockouts: 1/2 in;3/4 in
- Certified Listed: UL Listed
Typical Applications
- Extending Existing 4 in. Square Outlet Boxes
- Increasing Box Volume for Additional Conductor Fill
- Commercial and Residential Conduit Wiring Systems
- New Construction and Remodel Electrical Work
- Panel and Junction Box Depth Extensions
Why RACO?
RACO extension rings are built with welded steel construction for durability on demanding jobsites, and the RACO 207 carries UL Listing so electrical professionals can specify it with confidence in code-driven installations. With a 4 in. square footprint, 2-1/8 in. depth, and six 1/2 in. plus six 3/4 in. knockouts, the RACO 207 delivers a practical, reliable way to extend existing boxes without compromising conduit routing options.
Manufacturer Resources
Spec Sheet
Product Specs
- list_batch:
- RACO-20260916
- Product Type:
- Box Extension Ring
- Product Size:
- 4 in
- Product Depth:
- 2.125 in
- Product Shape:
- Square
- Drawn or Welded:
- Welded
- Bracket Type:
- No Bracket
- Wiring System:
- Conduit
- Knockouts:
- 1/2 in;3/4 in
- Certified Listed:
- UL Listed
- Department:
- Electrical
- Product Subgroup:
- Electrical Boxes
- Product Group:
- Boxes & Enclosures
RACO RACO207 – Frequently Asked Questions
1) How much depth does the RACO 207 add to an existing outlet box?
It adds 2-1/8 in. of depth. That is the deepest of the common 4 in. square ring depths, so it is the one to reach for when you are over on conductor fill or stacking a device behind a thick wall finish. The added volume is usable interior space for conductors, devices, and conduit connections.
2) Can I use a square extension ring instead of replacing an undersized electrical box?
That is exactly what the 207 is for. Rather than cutting out and re-roping an existing 4 in. square box, you bolt the 2-1/8 in. deep ring onto the face and gain interior volume for added conductors or a deeper device. Replacing the box only makes sense if the box itself is damaged or the wrong footprint. Note the ring has no mounting bracket, so it depends on the existing box being properly secured.
3) What size conduit knockouts does the RACO 207 square extension ring have?
Six 1/2 in. and six 3/4 in. knockouts, so you can bring in either trade size of EMT or rigid without changing rings. It is built for conduit wiring systems rather than cable clamps, so there are no integral NM clamps in it.
4) Is the RACO 207 extension ring UL Listed for commercial inspection work?
Yes, the 207 is UL Listed, which is what an inspector looks for on an extension ring in a code-driven commercial or institutional install. That is the full listing claim on record for it.
5) Will standard 4 in. square covers and device rings fit on the RACO 207?
Yes. The 207 keeps a standard 4 in. square profile, so common 4 in. square covers, blank plates, and device plaster rings mount to it the same as they would to the box underneath. You still need to order the cover separately; the ring is just the depth extension.
6) Can I use the RACO 207 with NM cable instead of conduit?
The 207 is specified for conduit wiring systems and has knockouts only, no built-in cable clamps. If you are landing NM cable you will need to add listed cable connectors to the 1/2 in. knockouts to secure the cable at the ring.
7) Is the RACO 207 welded or drawn steel, and does it matter?
Welded steel construction. On a welded body the corners are seam-welded rather than formed from a single stamped piece, which holds the square shape when you are pulling conduit or torquing a locknut against it. For an extension ring taking multiple conduit entries, that rigidity is the practical difference.
How fast can I get the RACO RACO207 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 RACO207 come with a warranty?
Absolutely. The RACO RACO207 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the RACO RACO207?
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