ABB - Installation Products CFB-858 - Ceiling Fan Box, 8 Cubic Inches, 4 Inch Diameter x 1/2 Inch Deep, 7/8 Inch Knockouts, Black Non-Metallic, with Lag Screws and V Clamp
ABB - Installation Products

CFB-858

UPC: 785991046458


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Overview

The ABB CFB-858 Ceiling Fan Box is a non-metallic electrical enclosure designed for secure ceiling fan installations in residential, commercial, and light industrial applications. Precision-molded from durable black non-metallic material, this fan box resists corrosion, moisture, and chemical exposure, ensuring long-term reliability in demanding environments. With an 8 cubic inch capacity and a compact 4-inch diameter x 1/2-inch depth footprint, the CFB-858 optimizes space efficiency without compromising functionality, making it ideal for tight installation spaces where performance and durability are critical. Engineered for professional electricians and contractors, the CFB-858 features 7/8-inch knockouts for seamless conduit integration, enabling flexible wiring configurations and simplified installation. The included lag screws and V clamp provide a vibration-resistant mounting solution, ensuring stable fan operation even in high-traffic areas or environments subject to mechanical stress. Key applications include residential ceiling fan installations, commercial office spaces, retail environments, and light industrial facilities where a corrosion-resistant, non-metallic solution is preferred. The non-metallic construction eliminates the risk of galvanic corrosion, making the CFB-858 an excellent choice for installations in humid or outdoor-adjacent areas. Its lightweight design simplifies handling and reduces installation time, contributing to cost-effective project execution. The CFB-858 is part of ABB’s Installation Products line, known for quality and innovation in electrical infrastructure. Whether upgrading existing systems or outfitting new construction, this ceiling fan box provides the reliability and versatility required for modern electrical installations.
  • 8 cubic inch capacity for compact installations
  • 4-inch diameter x 1/2-inch depth footprint
  • 7/8-inch knockouts for flexible conduit integration
  • Includes lag screws and V clamp for vibration-resistant mounting
  • Non-metallic construction resists corrosion, moisture, and chemicals

Specifications

Application
UL classified for 2 hour fire wall and or fire ceiling
Color
Black
Cubic Capacity
8 in3
Cubic Capacity
131096.8 mm3
Depth
1/2 in
Diameter
4 in
Diameter
101.6 mm
Material
Non-Metallic
Number Of Outlet
1
Size
4 Inches Diameter x 1/2 Inch depth
Standard
UL E11461
Standard
UL E11461 / UL E11461
Type
Fan Boxes
Package Dimensions (L x W x H)
0.01 IN x 0.01 IN x 0.01 IN
Package Dimensions (L x W x H)
0.0254 cm x 0.0254 cm x 0.0254 cm
Package Weight (Imperial)
0.180 L
Package Weight (Metric)
0.082 kg
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Frequently Asked Questions

What is the capacity of the ABB CFB-858 ceiling fan box?

The ABB CFB-858 has an 8 cubic inch capacity, suitable for compact installations.

What are the dimensions of the ABB CFB-858 ceiling fan box?

The ABB CFB-858 measures 4 inches in diameter and 1/2 inch in depth.

What type of knockouts does the ABB CFB-858 have?

The ABB CFB-858 features 7/8-inch knockouts for conduit integration.

What mounting hardware is included with the ABB CFB-858?

The ABB CFB-858 includes lag screws and a V clamp for vibration-resistant mounting.

Is the ABB CFB-858 compatible with non-metallic sheathed cable?

Yes, the ABB CFB-858 is designed for use with non-metallic sheathed cable.

What applications is the ABB CFB-858 suitable for?

The ABB CFB-858 is suitable for residential, commercial, and light industrial ceiling fan installations.

Is the ABB CFB-858 suitable for outdoor installations?

The non-metallic construction resists moisture and chemicals, making it suitable for humid or outdoor-adjacent areas.

What is the maximum load capacity for the ABB CFB-858?

The ABB CFB-858 is designed for standard ceiling fan mounting hardware; specific load ratings are not provided in the source data.

How to Install the CFB-858 Ceiling Fan and Fixture Box

This guide provides step-by-step instructions for mounting and wiring the CFB-858 ceiling fan and fixture box securely.

Estimated time: 30m

Tools needed:

Screwdriver, Drill, Wire strippers

Supplies needed:

#12 x 5/8” screws, #12 x 2” screws, Mounting brackets

  1. Position the box

    Position and press the CFB-858 box firmly against the joist where it will be mounted.

  2. Secure the box

    Fasten the preinstalled #12 x 5/8” screw near the center of the box to secure it to the joist.

  3. Drill pilot holes

    Drill 1/8" diameter pilot holes through the two oval slots on the box to prepare for mounting.

  4. Install the bracket

    Pull out the two #12 x 2” long screws and use them to install the fan or fixture bracket through the oval slots into the drilled holes.

  5. Mount the fan or fixture

    Mount the fan or fixture onto the installed bracket and make the electrical connections according to local electrical codes and the instructions provided with the fan or fixture.

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