Thomas & Betts Ceiling Box 26 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$109.56
$14.81
Thomas & Betts FN-426-C-V CEIL-FIXT VPRTGT BX 26CU 4X4X2.75

Thomas & Betts Ceiling Box 26 Cubic Inch Polycarbonate Vapor-Tight Fixture Box

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Model: FN-426-C-V
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$109.56
$14.81
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Thomas & Betts Ceiling Box 26 Cubic Inch Polycarbonate Vapor-Tight Fixture Box

Professional vapor-tight ceiling fixture mounting solution

The Thomas & Betts ceiling fixture box delivers reliable mounting and protection for ceiling-mounted electrical fixtures with 26 cubic inches of wiring capacity. Constructed from durable polycarbonate material in a professional black finish, this vapor-tight box provides secure installation for various ceiling fixture applications while maintaining electrical safety standards.

Professional Features & Benefits

  • 26 Cubic Inch Capacity: Provides ample wiring space for standard ceiling fixture connections and wire management requirements.
  • Polycarbonate Construction: Delivers superior durability and impact resistance for long-lasting performance in ceiling installations.
  • Vapor-Tight Design: Protects electrical connections from moisture and environmental contaminants in demanding applications.
  • Black Finish: Professional appearance that blends seamlessly with most ceiling fixture installations and decor.
  • UL Listed: Meets rigorous safety standards (UL e11461) ensuring reliable performance and code compliance.
  • Zero Knockouts: Clean design allows for custom entry points based on specific installation requirements.

Technical Specifications

  • Color: Black
  • Department: Electrical
  • Idea Granular Category Code Igcc: 4448 >> Ceiling box
  • Material: Polycarbonate
  • Number Of Knockouts: 0
  • Product Group: Electrical Boxes
  • Product Subgroup: Electrical Boxes
  • Product Type: Ceiling Boxes
  • Selling Unit Of Measure: each
  • Standards: UL e11461
  • Volume: 26 in_

Professional Applications

  • Residential ceiling fixture installations
  • Commercial lighting systems
  • Industrial facility lighting
  • Retail establishment fixtures
  • Office building ceiling mounts
  • Multi-unit property lighting
  • Professional service environments

Why Choose Thomas & Betts Quality?

Thomas & Betts ceiling boxes deliver proven reliability through UL listed safety certification and durable polycarbonate construction. The vapor-tight design and professional black finish ensure long-term performance and code compliance in demanding electrical installations.

Manufacturer Resources

Spec Sheet

Product Specs

Idea Granular Category Code Igcc:
4448 >> Ceiling box
Number Of Knockouts:
0
Product Group:
Boxes & Enclosures
Product Type:
Ceiling Boxes
Selling Unit Of Measure:
each
Standards:
UL e11461
Volume:
26 in³
Department:
Electrical
Product Subgroup:
Electrical Boxes
Product Color:
Black
Product Material:
Polycarbonate

Thomas & Betts FN-426-C-V – Frequently Asked Questions

1) Does the FN-426-C-V ceiling box come with knockouts for conduit or cable entry?
No. The box ships with zero knockouts, so every entry point is one you make yourself with the connector or fitting the job calls for. That is deliberate on a vapor-tight box: unused factory knockouts are leak paths, and on a non-metallic box you drill only where you need it and seal the entry with the appropriate listed watertight connector. Plan on supplying those fittings separately.
2) Can I use a polycarbonate ceiling box like this in a damp or wet location such as a parking garage or a shower area?
That is the point of it. The FN-426-C-V is a vapor-tight fixture box in polycarbonate, so the body will not corrode the way a steel box does in humid or washdown environments, and the sealed design keeps moisture off the splices. It is used for ceiling fixture mounting in commercial, industrial, and multi-unit lighting. The location listing still depends on the fixture and the connectors you use at each entry, so match those to the same damp or wet rating.
3) Is this Thomas & Betts vapor-tight ceiling box UL listed?
Yes. The FN-426-C-V carries UL listing under file e11461, which is the point an inspector will ask about on a non-metallic fixture box in a damp location.
4) Do I need a separate ground when using a non-metallic ceiling box?
Yes. Polycarbonate is non-conductive, so the FN-426-C-V cannot serve as part of the equipment grounding path the way a metal box can. Bring the equipment grounding conductor through and bond it directly to the fixture. Also note the box has no knockouts, so there is no metal raceway path to rely on either.
5) Should I use a vapor-tight box or a standard ceiling box for lighting in a cold or unconditioned space?
Where warm interior air can reach a fixture opening in an insulated ceiling below an attic or an unheated space, a vapor-tight box like the FN-426-C-V is the right call: it keeps moisture-laden air from migrating through the opening and condensing in the cavity. A standard steel or plastic ceiling box has open knockouts and does nothing for air sealing. Inside a conditioned space with no vapor barrier concern, a standard box is fine and cheaper to install.
6) Is the Thomas & Betts FN-426-C-V sold individually or in a case?
It is sold each, so order one per opening. The model number to specify is FN-426-C-V.
7) What color is the FN-426-C-V and will it show below a fixture canopy?
Black. On most ceiling installs the fixture canopy covers the box entirely, and where a sliver shows, black reads less than a bare steel or white box against a dark ceiling or an open joist bay.
How fast can I get the Thomas & Betts FN-426-C-V delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Thomas & Betts FN-426-C-V come with a warranty?
Absolutely. The Thomas & Betts FN-426-C-V is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Thomas & Betts FN-426-C-V?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Thomas & Betts FN-426-C-V from ZenSupply?
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