Allied Moulded P-221NV Black P...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$5.68
Allied Moulded P-221NV Black Polycarbonate Switch/Receptacle Box

Allied Moulded P-221NV Black Polycarbonate Switch/Receptacle Box

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Model: P-221NV

In Stock (leaves warehouse same day if ordered before 3pm ET)

$5.68
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Allied Moulded P-221NV Black Polycarbonate Switch/Receptacle Box

The Allied Moulded P-221NV is a black polycarbonate residential vapor seal switch/receptacle electrical box, engineered as part of Allied Moulded's FlexBox® line for durable, code-conscious residential wiring installations. Measuring 2-1/4-Inch x 3-9/16-Inch x 3-7/8-Inch with a 22-Cubic-Inch interior volume, this box is sized to accommodate standard switch and receptacle devices while providing a vapor-sealed barrier that helps limit air infiltration around wall penetrations. Built from tough, non-conductive polycarbonate, the P-221NV resists corrosion and impact better than many traditional metallic boxes, making it a reliable choice for new construction and remodel wiring projects.

Key Features

  • Compact Dimensions: 2-1/4-Inch x 3-9/16-Inch x 3-7/8-Inch footprint fits standard wall stud cavities for switch and receptacle installations.
  • 22-Cubic-Inch Capacity: Interior volume sized for single-gang switch or receptacle wiring devices and associated conductors.
  • Durable Polycarbonate Construction: Black polycarbonate material resists corrosion, cracking, and impact, offering long-term durability versus metallic alternatives.
  • Vapor Seal Design: Residential vapor seal construction helps reduce air infiltration around the box for improved wall assembly performance.
  • Switch/Receptacle Configuration: Purpose-built to house single-gang switch or receptacle devices in residential wiring applications.
  • FlexBox® System: Part of Allied Moulded's FlexBox® product line of nonmetallic residential electrical boxes.

Technical Specifications

  • Product Type: Switch/Receptacle Electrical Box
  • Material: Black Polycarbonate
  • Dimensions: 2-1/4-Inch x 3-9/16-Inch x 3-7/8-Inch
  • Volume: 22-Cubic-Inch
  • Model: P-221NV
  • Product Line: FlexBox®

Typical Applications

  • Residential Switch and Receptacle Wiring
  • New Construction Electrical Rough-In
  • Remodel and Retrofit Wiring Projects
  • Vapor Barrier Wall Assemblies
  • Single-Gang Device Installations

Why Allied Moulded?

Allied Moulded's P-221NV combines a durable black polycarbonate build with a vapor-sealed design to deliver a reliable, non-conductive alternative to metal boxes for residential switch and receptacle installations. As part of the established FlexBox® line, it's built to help electricians and homeowners complete clean, code-conscious wiring installations with confidence.

Manufacturer Resources

Product Specs

list_batch:
ALM-20260924
Product Type:
Electrical Box
Configuration:
Switch/Receptacle
Department:
Electrical
Product Group:
Boxes & Enclosures
Product Subgroup:
Electrical Boxes
Product Material:
Polycarbonate
Product Color:
Black

Allied Moulded P-221NV – Frequently Asked Questions

1) Is the Allied Moulded P-221NV big enough for a single-gang switch or receptacle with 12 AWG wiring?
The P-221NV gives you 22 cubic inches of interior volume for one single-gang switch or receptacle plus its conductors. That is a generous single-gang box, so a device fed with a couple of cables and grounds has room without cramming. Box fill still has to be calculated for your specific conductor count and device.
2) Will the P-221NV fit in a standard 2x4 stud wall cavity?
Yes. The box measures 2-1/4 x 3-9/16 x 3-7/8 inches, which sits inside a standard wall stud cavity for switch and receptacle work. A 2x4 stud gives 3-1/2 inches of depth, so the box footprint clears without furring the wall.
3) What does the vapor seal version of this Allied Moulded box actually do for me?
It gives you a sealed barrier at the box so air does not leak through the wall penetration behind a switch or receptacle. On an exterior wall with a poly vapor barrier, that means you are not cutting and taping around a standard box to keep the envelope intact. On an interior partition where air sealing is not a concern, a plain nonmetallic box does the same electrical job.
4) Can I use a nonmetallic box like the P-221NV instead of a metal box for residential rough-in?
The P-221NV is polycarbonate, non-conductive, and built for residential switch and receptacle rough-in, so it substitutes for a metal single-gang box in NM cable work. Because it is nonmetallic, the box itself needs no bonding, the ground goes straight to the device and to the grounding conductors. Where you are running metal conduit or armored cable and relying on the raceway for ground, you want a metal box instead.
5) Does the P-221NV hold up better than metal in a damp or corrosive spot?
Polycarbonate does not rust, and the description calls out resistance to corrosion, cracking, and impact compared with metallic boxes. That is the argument for using it in a basement, garage, or coastal build where a steel box would eventually bloom. It is a residential-duty box, not a weatherproof outdoor enclosure.
6) What is the exact part number to order for the Allied Moulded black vapor seal single-gang box?
Order Allied Moulded P-221NV. It is the black FlexBox single-gang vapor seal switch/receptacle box, one model with no size or color options to specify.
7) Is the P-221NV suitable for a remodel cut-in, or is it new construction only?
Allied Moulded lists it for both new construction rough-in and remodel or retrofit wiring. On new work it goes in before the drywall with the vapor seal integrated into the barrier; on a retrofit you only get the full air-sealing benefit if the wall is open enough to tie the seal into the barrier.
8) Will a standard switch plate or receptacle cover fit this box?
Yes. The P-221NV is a single-gang switch/receptacle box, so standard single-gang devices and standard or decorator wall plates mount to it the same way they would on any single-gang box.
How fast can I get the Allied Moulded P-221NV 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 Allied Moulded P-221NV come with a warranty?
Absolutely. The Allied Moulded P-221NV 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 Allied Moulded P-221NV?
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 Allied Moulded P-221NV from ZenSupply?
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