Orbit 4RB-MC-BHA 4 in Octagonal Electrical Box Bar Hanger

Product Description

The ORBIT 4RB-MC-BHA is a 4 inch octagonal (4O) welded electrical box designed for ceiling and wall installations in residential and light commercial wiring projects. Built to a depth of 1.5 inches, it accommodates standard device and fixture connections without crowding the box. The box includes 1/2 inch knockouts sized for MC cable entry and four loom pryouts, giving electricians flexible conduit and cable routing options. An adjustable bar hanger is included, allowing secure mounting between joists or studs without cutting into finished framing.

This octagonal box is suited for ceiling-mounted lighting fixtures, junction applications, and outlet box installations in new construction and renovation work. The adjustable bar hanger spans standard joist spacing, making it practical for retrofit installations where direct structural fastening is not possible. The 4O form factor is a widely used standard in residential electrical rough-in work and is compatible with standard round and octagonal cover plates.

Key Features

• 4 inch octagonal welded steel construction for rigid, durable installation
• 1.5 inch depth provides adequate wire capacity for fixture and junction connections
• 1/2 inch knockouts support MC cable and standard conduit fittings
• Four loom pryouts allow flexible cable routing configurations
• Included adjustable bar hanger enables mounting between joists without structural modification

Compatibility

Designed as an OEM-style replacement and new-construction fit for standard 4 inch octagonal electrical box applications using round or octagonal cover plates.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local ordinances. De-energize the circuit at the panel before beginning any wiring work. Secure the bar hanger firmly to framing members before pulling and connecting conductors. Do not exceed the box fill capacity as calculated per NEC Article 314.