Orbit 3-1/2 in Drawn Octagon Steel Box 1-1/2 in Deep with NM Clamp with Bracket 3RB-NM-FB

Product Overview

The Orbit 3RB-NM-FB is a 3-1/2" drawn octagon steel electrical box finished in galvanized steel. It is 1-1/2" deep and includes an NM cable clamp plus mounting bracket for dry-location rough-in and fixture support.

Designed for contractor stock, new construction, maintenance, and ceiling fixture installations, this box carries UL and RoHS certifications.

Key Features

• 3-1/2 in drawn octagonal shape
• 1-1/2 in depth
• Galvanized steel construction
• Includes NM (nonmetallic) cable clamp
• Integrated bracket for mounting
• Rated for dry locations; UL and RoHS certified

Function and intended use

This octagon steel box is intended for dry-location electrical box and cover work, including rough-in for branch circuits and support for ceiling fixtures. It provides a metal enclosure for splices and device mounting where an octagonal form factor is required.

• Provides an enclosure for splices and fixture connections
• Used where an octagonal box is specified for lighting or ceiling fixture mounts

Common applications

The 3RB-NM-FB is specified for contractor stock, new construction, commercial maintenance, and replacement work where a compact octagon box is needed.

• Octagon box rough-in
• Ceiling fixture support
• Dry-location branch-circuit work
• Commercial maintenance and contractor stock

Dimensions and construction

The box is a 3-1/2 inch drawn octagon with a 1-1/2 inch depth and is made from galvanized steel for corrosion resistance in typical dry indoor environments.

• Shape: 3-1/2 in octagonal
• Depth: 1-1/2 in
• Material and finish: galvanized steel

Mounting, clamps and connections

This SKU includes an NM cable clamp and a bracket for mounting. Confirm knockout sizes and wall finish thickness at the job site to ensure compatibility with fixtures and devices.

• Includes NM clamp for nonmetallic cable
• Includes mounting bracket for box installation
• Mounting type: box mount

Certifications and location rating

The product is listed with UL and complies with RoHS requirements. It is rated for dry locations only and should be used where a dry-location rating is acceptable.

• Certifications: UL, RoHS
• Location rating: Dry location

Before You Order

Confirm the model number and quantity required before ordering. Verify the box depth, knockout requirements, and mounting method against the fixture or device being installed and ensure the dry-location rating meets your project needs. Use a qualified electrician for field wiring, grounding, device mounting, and final inspection.

• Confirm model: 3RB-NM-FB (SKU 3RBNMFB)
• Verify box size, depth, and knockout locations for device/fixture compatibility
• Check wall finish thickness and mounting requirements
• Engage a qualified electrician for installation and final inspection

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Orbit 3-1/2 in Drawn Octagon Steel Box 1-1/2 in Deep with NM Clamp with Bracket 3RB-NM-FB. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.