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RACO 202 4 in. Square Steel Extension Ring, 1-1/2 in. Deep, Eight 3/4 in. KO's
Model: RACO-202
RACO 202 4 in. Square Steel Extension Ring, 1-1/2 in. Deep, Eight 3/4 in. KO'sThe RACO 202 is a 4 in. square extension ring, drawn from steel, engineered to extend the depth of an existing 4 in...
RACO
$3.69
RACO 203 4 in. Square Steel Extension Ring, 1-1/2 in. Deep
The RACO 203 is a 4 in. square extension ring engineered from drawn steel to extend the depth of existing square outlet and device boxes used in conduit wiring systems. This extension ring measures 1-1/2 in. deep and features eight 1/2 in. and four 3/4 in. knockouts, giving installers multiple conduit entry options for panel, junction, and device box applications. Manufactured without a mounting bracket, the RACO 203 mounts directly to an existing box to add capacity for additional conductors, splices, or devices. This extension ring is UL Listed, making it suitable for commercial, industrial, and residential electrical installations that require reliable conduit-based wiring.
Key Features
- Trade Size: 4 in. square footprint matches standard square boxes for straightforward alignment and stacking.
- Durable Construction: One-piece drawn steel body provides a strong, seamless enclosure suited to demanding conduit wiring systems.
- Extension Depth: 1-1/2 in. deep design adds usable interior volume to an existing 4 in. square box for additional splices, devices, or conductor fill.
- Knockout Configuration: Eight 1/2 in. and four 3/4 in. knockouts provide flexible conduit entry points on multiple sides of the ring.
- Conduit Wiring System: Purpose-built for conduit wiring systems, allowing conduit to be run directly into the extended box assembly.
- No Bracket Design: Ships without a mounting bracket, allowing the ring to be secured directly to the existing device or junction box.
- Square Shape: Square profile matches standard 4 in. square box footprints for seamless stacking and alignment.
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;3/4 in
- Certified Listed: UL Listed
Typical Applications
- Extending Existing 4 in. Square Device and Junction Boxes
- Commercial and Industrial Conduit Wiring Installations
- Adding Depth and Capacity for Additional Wire Splices
- New Construction and Renovation Electrical Projects
- Panelboard and Junction Box Extensions
- Multi-Conduit Entry Applications Requiring 1/2 in. and 3/4 in. Knockouts
Why RACO?
RACO 203 extension rings combine one-piece drawn-steel construction with UL Listed performance for dependable, code-compliant box extensions on the job site. The 4 in. square profile, 1-1/2 in. extension depth, and combination of eight 1/2 in. and four 3/4 in. knockouts give electrical contractors the flexibility to adapt existing boxes for additional conduit runs and device capacity. Backed by RACO's reputation for rugged steel electrical boxes and fittings, the 203 extension ring is built for demanding commercial and industrial conduit wiring systems.
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;3/4 in
- Certified Listed:
- UL Listed
- Department:
- Electrical
- Product Subgroup:
- Electrical Boxes
- Product Group:
- Boxes & Enclosures
RACO RACO203 – Frequently Asked Questions
1) Will the RACO 203 extension ring fit a standard 4 in. square box?
Yes. The RACO 203 has a 4 in. square footprint that matches standard 4 in. square outlet, device, and junction boxes, so it stacks directly on top of the existing box with no adapter. It adds 1-1/2 in. of depth to that box.
2) I need to extend a single-gang switch box in a conduit run - is the RACO 203 the right part?
Not for a single-gang box. The RACO 203 is built for conduit wiring systems and carries eight 1/2 in. and four 3/4 in. knockouts, but its 4 in. square footprint only aligns with 4 in. square boxes. For a 1-gang switch box, the Thomas & Betts SBEX Steel City adjustable switch box extension is the part sized to that opening, at 3.5 cu. in. in pre-galvanized steel.
3) Can a Steel City SBEX switch box extension be used in place of the RACO 203 extension ring?
No, they extend different boxes. The RACO 203 is a 4 in. square extension ring, 1-1/2 in. deep, with a square profile that stacks on a standard 4 in. square outlet or junction box. The Thomas & Betts SBEX is a 1-gang switch box extension of 3.5 cu. in. in pre-galvanized steel, sized for a single-gang switch box opening. If the existing box is a 4 in. square, the 203 is the one that matches the footprint; if it is a 1-gang switch box, the SBEX is the matching extension.
4) How much extra box volume does a 1-1/2 in. deep 4 in. square extension ring give me for wire fill?
The 203 adds 1-1/2 in. of usable depth on top of an existing 4 in. square box, which is the room you gain for extra conductors, splices, or a device you could not fit in the original box. It does not change the 4 in. square footprint, so your existing cover and device plates still line up.
5) Does the RACO 203 come with a mounting bracket?
No bracket. The 203 is built to screw directly to the existing device or junction box, not to a stud or joist. If you need a bracketed box for new framing, this is the wrong part.
6) Is the RACO 203 extension ring UL Listed for commercial work?
Yes, the 203 is UL Listed, which is what most commercial and industrial inspections look for on a steel box extension. It is built for conduit wiring systems rather than cable-clamped NM installations.
7) Can I add a receptacle or switch to an existing 4 in. square box that is already crowded?
That is exactly what the 203 is for. It mounts on the existing box and adds 1-1/2 in. of depth so you have room for the device plus the conductors already in the box, and the 1/2 in. and 3/4 in. knockouts let you bring another conduit run in at the same time.
8) Drawn steel or welded steel extension ring, does it matter?
The 203 is drawn, meaning the body is formed from one piece of steel with no welded corner seams. For exposed conduit work in a plant or garage that means fewer seams to fail and a cleaner interior with no weld burrs to nick insulation.
9) What is the RACO part number for a 4 in. square 1-1/2 in. deep steel extension ring?
RACO 203. That is the manufacturer part number to order, and it covers the 4 in. square drawn-steel ring at 1-1/2 in. depth with no bracket.
10) What is the difference in steel construction between the RACO 203 and the Steel City SBEX extension?
The RACO 203 is a one-piece drawn steel extension ring, which gives it a seamless body, and it is UL Listed. The Thomas & Betts SBEX is made from pre-galvanized steel and is described as adjustable. Drawn construction is a forming method; pre-galvanized refers to the coating on the stock, so the two describe different attributes of the steel rather than competing grades.
How fast can I get the RACO RACO203 delivered?
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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 RACO203 come with a warranty?
Absolutely. The RACO RACO203 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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