Southwire 54151-S-UPC Old Work 4x4 Octagon Box

Product Description

The SOUTHWIRE 54151-S-UPC is a 4-inch by 4-inch old-work octagon electrical box designed for installing ceiling and wall lighting fixtures, ceiling fans, and convenience outlets in existing construction. Built from durable steel, this box ships ready to mount with combo-head fixture cover mounting screws included. It is sized for standard octagon cutouts and fits into finished ceilings or walls without requiring full tear-out. Licensed electricians and qualified electrical contractors handle this type of installation in both residential and light commercial settings.

This old-work octagon box is suited for retrofit and renovation projects where the wall or ceiling finish is already in place. It works with ceiling-mounted lighting fixtures, fan-rated applications where the box meets load requirements, and wall-mounted devices or convenience outlets. The steel construction provides a stable mounting surface for fixture canopies and cover plates. It is appropriate for dry and damp-listed locations depending on the fixture installed.

Key Features

• Old-work design for retrofit installation in finished ceilings and walls
• 4 inches by 4 inches octagon form factor fits standard cutouts
• Durable steel construction for rigid fixture support
• Combo-head fixture and cover mounting screws included
• Compatible with lighting fixtures, ceiling fans, and convenience outlets

Compatibility

Designed as an OEM-style replacement and retrofit solution for standard 4-inch by 4-inch octagon box applications in residential and light commercial electrical systems.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize the circuit at the breaker panel and verify the absence of voltage with a meter before beginning work. Ensure the box is rated for the load of the fixture or fan being mounted, particularly for ceiling fan installations where dynamic loading applies. Secure the box firmly to framing or use an approved old-work brace before attaching the fixture.

Technical Specifications

• Box Size: 4 inches x 4 inches
• Box Type: Old Work Octagon
• Material: Steel
• Weight: 0.51 pounds
• Unit of Measure: Each

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: 54151-S-UPC