Thomas & Betts 3-Gang Vapor-Ti...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$137.79
$19.40
Thomas & Betts FN-354-V 3-G VPRTGT 54CU 3.5X5.625X3.25IN PC

Thomas & Betts 3-Gang Vapor-Tight Electrical Box 54 Cubic Inch Non-Metallic Construction

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Model: FN-354-V
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$137.79
$19.40
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Thomas & Betts 3-Gang Vapor-Tight Electrical Box 54 Cubic Inch Non-Metallic Construction

Professional vapor-tight protection for demanding electrical installations

The Thomas & Betts 3-gang vapor-tight electrical box delivers reliable protection with 54 cubic inches of capacity in durable non-metallic construction. This specialty electrical box provides professional-grade vapor-tight sealing for applications requiring moisture and environmental protection, featuring black finish and UL E11461 standards compliance for dependable performance in challenging conditions.

Professional Features & Benefits

  • 54 Cubic Inch Capacity: Generous interior volume accommodates multiple connections and wiring configurations for complex installations.
  • 3-Gang Configuration: Triple-gang design supports multiple devices or switches in a single enclosure for efficient space utilization.
  • Vapor-Tight Construction: Specialized sealing design prevents moisture infiltration and protects electrical connections in humid or wet environments.
  • Non-Metallic Material: Corrosion-resistant construction eliminates rust concerns while providing excellent durability and longevity.
  • UL E11461 Listed: Meets rigorous safety standards ensuring reliable performance and code compliance for professional installations.
  • Black Finish: Professional appearance integrates seamlessly with various installation environments and aesthetic requirements.

Technical Specifications

  • Color: Black
  • Department: Electrical
  • Idea Granular Category Code Igcc: 4439 >> Specialty electrical boxes
  • Material: Non-Metallic
  • Product Group: Electrical Boxes
  • Product Subgroup: Electrical Boxes
  • Product Type: Specialty Electrical Boxes
  • Selling Unit Of Measure: each
  • Standards: UL E11461
  • Volume: 54 in_

Professional Applications

  • Outdoor electrical installations requiring weather protection
  • Industrial facilities with high humidity or moisture exposure
  • Commercial buildings in challenging environmental conditions
  • Residential applications in basements, garages, or exterior locations
  • Marine and coastal installations requiring corrosion resistance
  • Food service and processing facilities with washdown requirements

Why Choose Thomas & Betts Quality?

Thomas & Betts delivers proven reliability through UL E11461 listing and professional-grade non-metallic construction. The vapor-tight design and 54 cubic inch capacity provide long-term performance and versatility for demanding electrical applications where moisture protection and durability are essential.

Manufacturer Resources

Spec Sheet

Product Specs

Idea Granular Category Code Igcc:
4439 >> Specialty electrical boxes
Product Group:
Boxes & Enclosures
Product Type:
Specialty Electrical Boxes
Selling Unit Of Measure:
each
Standards:
UL E11461
Volume:
54 in³
Department:
Electrical
Product Subgroup:
Weatherproof Enclosures
Product Color:
Black
Product Material:
Non-Metallic

Thomas & Betts FN-354-V – Frequently Asked Questions

1) Will a 3-gang vapor-tight box with 54 cubic inches give me enough fill for three devices?
The Thomas & Betts FN-354-V gives you 54 cubic inches across the full 3-gang enclosure, which is the number you work from when you run your box fill calculation for conductors, devices and grounds. Because it is a single one-piece 3-gang body rather than ganged singles, that volume is shared, so you size the whole opening at once instead of per gang.
2) Is the Thomas & Betts FN-354-V UL listed?
It carries UL listing under file E11461. If your inspector or spec calls for a listed non-metallic enclosure, that is the reference to cite on the submittal.
3) Is the FN-354-V box metal or plastic, and will it hold up in a coastal or washdown area?
Non-metallic construction, so there is nothing in the body to rust or corrode. That is why it gets specified in coastal and marine work, food service areas that get hosed down, and damp basements or garages where a steel box would eventually bleed rust through the cover. The body is black.
4) What does vapor-tight actually buy me over a standard weatherproof box?
A vapor-tight box is built to keep moisture-laden air out of the wiring compartment, not just to shed rain off the outside. That matters where the air itself is the problem: humid industrial spaces, refrigerated or processing rooms, washdown zones, exterior walls that see condensation cycling. A standard box relies on a gasketed cover to shed water and will still breathe humidity through the seams. If your problem is splash, a weatherproof box is enough; if it is constant humidity or washdown, this is the category you want.
5) I need this on a submittal - what is the manufacturer part number for the Thomas & Betts 3-gang vapor-tight box?
Thomas & Betts FN-354-V. That is the 3-gang, 54 cubic inch, non-metallic vapor-tight version, and the V suffix is what separates it from the non-vapor-tight members of the FN series. Specify the full designation including the suffix so you do not get shipped the standard box.
6) Do I order the FN-354-V by the box or individually?
It sells each, one box per unit, so order the actual count of openings you have. There is no case-pack minimum to work around when you only need a couple for a job.
How fast can I get the Thomas & Betts FN-354-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-354-V come with a warranty?
Absolutely. The Thomas & Betts FN-354-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-354-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
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