Southwire SBEX-UPC Add-a-depth Switch Box Extension Ring

Product Description

The SOUTHWIRE SBEX-UPC is a switch box extension ring designed to increase usable depth in existing electrical boxes. It supports two or more toggle switches, duplex receptacles, decorative devices, and a variety of outlet configurations within a single gang or multi-device box opening. The telescoping design adjusts to match the actual wall depth, allowing a flush, code-compliant finish without cutting out additional drywall or retrofitting a deeper box. Licensed electricians and experienced low-voltage installers use this ring during new construction and remodel work to bring shallow boxes up to proper fill capacity.

This extension ring is well suited for commercial environments where multiple-point lighting controls, switch banks, or grouped receptacle clusters are required at a single wall location. It is also used in residential remodel projects where existing boxes fall short of NEC box-fill depth requirements after additional wiring is added. The adjustable depth range makes it practical across a range of wall assemblies, including standard drywall and thicker plaster or tile substrates.

Key Features

• Telescoping design adjusts to correct wall depth without box replacement
• Supports two or more toggle switches, duplex devices, and decorative outlet configurations
• Suited for commercial multi-point lighting control applications
• UL listed for safety compliance
• RoHS compliant construction

Compatibility

Designed as an OEM-style add-depth solution for standard residential and commercial switch boxes requiring additional depth to meet NEC box-fill requirements.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize the circuit at the breaker panel and verify with a voltage tester before opening the box or handling any conductors. The ring slides over the existing box and adjusts to the wall surface before securing; ensure all conductors are properly managed within the extended fill space. Do not exceed the box-fill capacity as calculated per NEC Article 314.

Technical Specifications

• Weight: 0.123 pounds
• Certifications: UL Listed, RoHS Compliant
• Unit of Measure: Each

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: SBEX-UPC