Southwire 54151-R-UPC 4 Inch Octagon Electrical Box

Product Description

The SOUTHWIRE 54151-R-UPC is a 4-inch steel octagon electrical box designed for mounting ceiling and wall lighting fixtures, ceiling fans, convenience outlets, and general wiring devices. Built from durable steel, this box provides a solid, code-compliant mounting surface for residential and light commercial electrical installations. It ships with combo-head fixture mounting screws included, reducing the need for additional hardware on the job. Electricians use this box during rough-in and finish phases to support standard fixture loads in junction and outlet applications.

This octagon box is suited for residential new construction, renovation, and retrofit installations where ceiling or wall-mounted lighting fixtures and fans need a secure, stable electrical enclosure. It works with standard convenience outlets and wiring devices as well. The 4-inch octagon format is a widely used configuration in residential branch circuit work, fitting common stud, joist, and bar-hanger mounting setups.

Key Features

• Steel construction for durability and mechanical protection of conductors
• 4-inch octagon form factor compatible with standard residential fixture applications
• Supports ceiling and wall lighting fixtures, ceiling fans, and convenience outlets
• Combo-head fixture and cover mounting screws included
• Sold individually (each) with a minimum order quantity of one

Compatibility

Designed as an OEM-style replacement and standard-fit octagon box for residential and light commercial electrical fixture and device installations requiring a 4-inch octagon enclosure.

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 absence of voltage before beginning any work. Ensure the box is rated for the fixture load being supported, particularly when installing ceiling fans. Secure the box to structural framing or an approved bar hanger before connecting conductors or mounting fixtures.