Thomas Betts 54151-1/2 3/4 Octagon Ceiling Box 4in

Product Description

The THOMAS BETTS 54151-1/2 3/4 is a steel octagon ceiling electrical box designed for overhead junction and fixture applications in residential and light commercial electrical installations. Constructed from galvanized steel, it measures 4 inches in height, 4 inches in width, and 1-1/2 inches in depth. The box features nine knockouts sized for 1/2-inch and 3/4-inch trade-size conduit or connectors, giving installers flexible routing options. It carries UL listing under File E2969, confirming compliance with standard safety requirements for electrical enclosures. Licensed electricians use this box as a primary junction point or as a mounting base for ceiling-mounted fixtures and devices.

This octagon ceiling box is suited for new construction and retrofit wiring projects where a standard 4-inch round-footprint box is required at ceiling level. It is non-weather-resistant and intended for dry or damp interior locations only. The galvanized finish provides corrosion resistance appropriate for typical indoor environments. The 1-1/2-inch depth accommodates standard wire bundles and connectors in typical residential and light commercial ceiling assemblies.

Key Features

• Octagon form factor with 4-inch height and 4-inch width for standard ceiling box fitment
• 1-1/2-inch depth supports wire management and connector clearance
• Nine knockouts in 1/2-inch and 3/4-inch trade sizes for conduit or cable connector entry
• Galvanized steel construction for durability and corrosion resistance in interior applications
• UL listed under File E2969
• Non-weather-resistant rating — suitable for interior dry or damp locations

Compatibility

Designed as an OEM-style replacement or new-installation ceiling box for standard 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 NFPA 70 (NEC) requirements for electrical box mounting and fill calculations. De-energize the circuit at the breaker panel and verify absence of voltage before beginning work. Secure the box to framing or an approved hanger bar rated for the intended load before pulling conductors. Do not exceed the box fill capacity as calculated per NEC Article 314.