Orbit 3-1/2 in Drawn Octagon Steel Box 1-1/2 in Deep 3RB-50-EXT

Product Overview

The Orbit 3RB-50-EXT is a 3-1/2 inch drawn octagon electrical box constructed from galvanized steel and sized 1-1/2 inches deep for dry-location rough-in, fixture support, and contractor stock.

Designed for ceiling fixture and branch-circuit applications in commercial and residential construction, the box carries UL and RoHS listings and is intended for use where a galvanized, steel octagon box is specified.

Key Features

• 3-1/2 in drawn octagonal shape
• 1-1/2 in depth for shallow fixture and device mounting
• Galvanized steel construction
• Listed for dry-location use
• Manufacturer SKU: 3RB-50-EXT (SKU 3RB50EXT)

Function and typical applications

This octagon steel box provides a mounting and junction point for ceiling fixtures, branch-circuit splices, and small device rough-in where a shallow octagonal enclosure is required.

It is intended for contractor stock, new construction, maintenance, and commercial work in dry locations.

• Ceiling fixture support and junctions
• Dry-location branch circuit boxes and splices
• Commercial maintenance and new construction rough-in

Physical specifications and certifications

The 3RB-50-EXT is a drawn steel octagon box with a nominal 3-1/2 inch octagonal shape and 1-1/2 inch depth. The unit is finished in galvanized steel to resist corrosion in typical dry-location environments.

Certifications listed by the manufacturer include UL and RoHS.

• Shape: 3-1/2 in octagon
• Depth: 1-1/2 in
• Material: Steel
• Finish: Galvanized
• Location rating: Dry location
• Certifications: UL, RoHS
• Manufacturer part number / SKU: 3RB-50-EXT / 3RB50EXT

Installation and compatibility notes

Confirm the box size, required depth, knockout placement, wall or ceiling finish thickness, and mounting method before installation to ensure compatibility with fixtures and cover plates.

Field wiring, grounding, device mounting, and final inspection should be performed by a qualified electrician in accordance with local electrical code.

• Verify knockout needs and raised-depth requirements for your fixture or device
• Ensure mounting method (box mount) suits the application
• Use a qualified electrician for wiring and inspection

Before You Order

Confirm the model number and quantity required before ordering. Verify that a 1-1/2 in depth and 3-1/2 in octagonal footprint meet your fixture, knockout, and mounting needs.

• Confirm knockout pattern and raised depth required for your application
• Check wall or ceiling finish thickness and mounting method compatibility
• Use a qualified electrician for installation and code compliance

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 3RB-50-EXT. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.