Southwire 54151-BX-UPC Nail-on 4x4 Octagon Electrical Box

Product Description

The SOUTHWIRE 54151-BX-UPC is a nail-on octagon electrical box designed for mounting ceiling and wall fixtures in residential and light commercial wiring applications. At 4 inches by 4 inches, it provides a standard footprint suitable for a range of device installations. The box ships with combination-head cover mounting screws, so the hardware needed to secure a fixture cover is included out of the box. Weighing 0.542 pounds, it is lightweight enough for single-person installation. UL listing confirms it meets recognized safety standards, and RoHS listing confirms compliance with hazardous substance restrictions.

This octagon box is suited for new construction and retrofit wiring where a nail-on fastening method is practical. Typical applications include installing flush or pendant ceiling light fixtures, ceiling fans, wall-mounted light fixtures, and convenience outlet devices. The 4-inch by 4-inch octagon format is a widely used configuration in residential electrical rough-in work, making this box a common choice when running branch circuits to lighting and fan locations.

Key Features

• 4 inches by 4 inches octagon footprint — standard size for ceiling and wall fixture mounting
• Nail-on design for direct attachment to framing during rough-in
• Combination-head cover mounting screws included
• UL listed for compliance with recognized electrical safety standards
• RoHS listed — meets hazardous substance restrictions
• Lightweight at 0.542 pounds for easy single-person installation

Compatibility

Designed as an OEM-style replacement and new-installation box compatible with standard 4-inch octagon fixture covers, ceiling light fixtures, ceiling fans, and convenience outlet devices in residential and light commercial wiring systems.

Installation Notes

Installation of electrical boxes must comply with applicable NEC requirements and local jurisdiction amendments. A licensed electrician should perform or inspect branch circuit rough-in work. De-energize the circuit at the breaker panel and verify with a non-contact voltage tester before making any wire connections. Do not exceed the box fill capacity as calculated per NEC conductor fill rules.