RACO 203 4 in. Square Steel Extension Ring, 1-1/2 in. Deep

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.