Orbit 4 in Octagon 1-1/2 in Deep 4O Octagon Steel Box NM Clamp FB Bracket 4RB-NM-FB

Product Overview

The Orbit 4RB-NM-FB is a welded 4 in octagon steel electrical box for rough-in and fixture replacement work. It measures 4 in x 4 in x 1-1/2 in and provides 15.5 cu in of internal volume.

This SKU includes an NM clamp and an FB bracket and is constructed from galvanized 16 GA sheet steel. The box is UL listed (UL File E227970) and RoHS compliant for dry-location applications.

Key Features

• 4 in octagon welded steel box, 1-1/2 in depth
• 15.5 cubic inch internal capacity
• Includes NM clamp for nonmetallic cable entries
• Includes FB bracket for fixture mounting support
• Galvanized finish, 16 GA sheet steel construction
• UL listed and RoHS compliant (UL File E227970)

What this box is for

The Orbit 4RB-NM-FB is intended for electrical rough-in, junction, and light fixture box installations where a 4 in octagon box is required.

Typical uses include ceiling or wall junction box work, light fixture installations and replacements, commercial ceiling rough-in, and general dry-location electrical work.

• Suitable for fixture and junction box applications where a 4 in octagon box is specified
• Used in new construction, retrofit, and maintenance projects in dry locations

Dimensions and box volume

Physical size and internal capacity are provided to help verify box-fill and fit.

The box measures 4 in W x 4 in H x 1-1/2 in deep and provides 15.5 cubic inches of internal volume.

• External dimensions: 4 in x 4 in x 1-1/2 in
• Internal volume: 15.5 cu in — use applicable local box-fill rules to confirm suitability for conductors, devices, and fittings

Cable entry and clamp type

This SKU includes an NM clamp intended for use with nonmetallic (NM) cable entries.

Verify the knockout pattern and NM clamp orientation against your installation requirements.

• Clamp type: NM clamp (included)
• Intended for securing nonmetallic sheathed cable where permitted by local code

Bracket and mounting considerations

The box is supplied with an FB bracket intended to assist with fixture mounting. The bracket provides a means to attach fixtures per the product's design.

Verify fixture mounting method, required support, and compliance with local codes and installation guidelines for your specific fixture.

• Bracket type: FB bracket (included)
• Confirm mounting method and required support for the fixture being installed

Certifications and location rating

The Orbit 4RB-NM-FB is listed by UL and is RoHS compliant. The UL file reference is E227970.

The product is rated for dry location installation; install in accordance with applicable electrical codes.

• Certifications: UL, RoHS (UL File E227970)
• Location rating: Dry location

Before You Order

Confirm model number, depth, knockout pattern, clamp type, and device opening before ordering. Installation should be completed by qualified electrical personnel.

• Verify box-fill calculations for 15.5 cu in capacity against devices and conductors to be installed
• Confirm NM clamp is appropriate for the cable type and permitted by local code
• Check that your fixture mounting method and support meet local code and installation requirements

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Orbit 4 in Octagon 1-1/2 in Deep 4O Octagon Steel Box NM Clamp FB Bracket 4RB-NM-FB. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.