Model # B120R

Internet #202077323

Store SKU #141206

null 1-Gang 20 cu. in. PVC Old Work Box

1-Gang 20 cu. in. PVC Old Work Box

  • For Old Work applications
  • 20 cubic inch capacity
  • Includes integral clamps to hold wiring securely in place
$189 /each
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Frequently Bought Together

Product Overview

The Carlon Zip Box Blue 1-Gang 20 cu. in. Old Work Non-Metallic Switch and Outlet Box is designed to work with non-metallic sheathed cable in accordance with Article 314 of the National Electric Code. Great for light commercial and residential applications, the box is crafted with non-conductive PVC for durability and is fire rated and UL listed to help ensure safety.

  • Use for old work applications in residential or commercial remodeling projects
  • Designed for use with non-metallic sheathed cable and listed for masonry walls
  • Sized for standard devices and switches and extra capacity for wiring and larger devices
  • Thermoplastic construction resists rust and will not conduct electricity
  • Built-in cable clamps hold wires firmly in place
  • Mounting ears, swing bracket and captive nails provide wide range of installation options
  • PVC construction is classified for 2-hour fire wall rating
  • Meets NEMA OS-2, UL listed UL514C, E11461 and R9140
  • Add an additional outlet where you need it. Check out our Project Guide on How to Install Remodeling Boxes.

Info & Guides

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Product Depth (in.)
Product Height (in.)
Product Width (in.)
Trade Size (in.)


Box Type
Wall box
Color Family
Electrical Product Type
Clamp,Ears,Old Work
Number of Gangs
Number of Knockouts
Package Quantity
Packaging Type
Consumer Packaging
Power Distribution Features
Fire Rated
Product Weight (lb.)

Warranty / Certifications

Certifications and Listings
1-UL Listed
Manufacturer Warranty

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Customer Questions & Answers

Wall Depth?

Hi, I live in an old house and the walls are 1inch thick due to the outer layer of plaster and then wooden slats. Are the tabs far back enough to fit this depth of wall? Cheers
Asked by: Bungle02
It will be if you use longer screws, I've had to do it before on some walls and it works great with longer screws. I believe they're size #6 screws.
Answered by: 03Xtreme
Date published: 2017-03-06

I hear that you can only put 1 cable (romex) per box, is this correct?

Asked by: BossMan
There can only be one cable per cable entrance, but you can use mulitple cables up to the capacity of the box - reference Article 314 to the NEC.
Answered by: Thomas & Betts
Date published: 2016-09-26

can these be used with fmc wire

Asked by: Pete01
No, you cannot use flexible metallic conduit with PVC wall boxes.
Answered by: Thomas & Betts
Date published: 2015-09-20

specification of pvc used in gang box

Asked by: shammi
Box is made of polyvinyl chloride
Answered by: Thomas & Betts
Date published: 2016-01-23
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Customer Reviews

1-Gang 20 cu. in. PVC Old Work Box is rated 3.1 out of 5 by 11.
Rated 1 out of 5 by from One problem with this box is that the swing bracket screw requires so much torque to get it movin... One problem with this box is that the swing bracket screw requires so much torque to get it moving initially that it's very easy to break the dry wall. I found this out the hard way. The remedy is to get the screw started before you insert the box into cavity. One done, the box works well, but I've never had this problem with other boxes, and it's something the manufacturer could easily fix. Hence I'm giving this 2 stars as I'm betting I won't be the only one to hit this problem where a simple DIY job becomes a much more complicated one.
Date published: 2016-12-11
Rated 3 out of 5 by from This box works well for existing walls. Mark and cut the hole, push the box in the hole, tighten ... This box works well for existing walls. Mark and cut the hole, push the box in the hole, tighten the screws, done. BUT the screws are hard t turn and are cheap, soft metal and strip easily.
Date published: 2017-01-28
Rated 1 out of 5 by from Poor design Bought some reccessed wall outlets for My TV outlet doesnt fit had to shave some of the trim inside box
Date published: 2017-03-02
Rated 5 out of 5 by from Best box for drywall For any DIYers out there that have drywall in their homes, I highly recommend that you have a few of these boxes on hand. Installing an electrical box after the drywall is already up can be challenging, but this box helps to take away some of the difficulty. You have the freedom to install this box anywhere on the wall, rather than only next to a stud. There is no need to nail anything into place and this box, when tightened, holds securely to the wall. This box works great for retrofitting your home for wall mount televisions, installing additional light switches, adding outlets in places like the garage, and many other potential uses.
Date published: 2013-10-08
Rated 2 out of 5 by from No good anymore. Not sure what changed but the screws are impossible to tighten lately and strip twice as easy.
Date published: 2016-12-21
Rated 5 out of 5 by from Perfect sized box for times or many junction connections Simple to use, just cut a hole in the wall, fasten using upper and lower wing screws, and your done.
Date published: 2011-11-29
Rated 4 out of 5 by from good retrofit box Retrofit old work box. The extra depth makes wiring a little easier when using 12/2 awg. I found that I had to screw the tabs in a little before putting in the wall or the tabs won't start turning correctly. They're made with just two tabs (one on top and one on bottom). Wish they had four tabs on them like the 3 gang boxes. They squeak a little when tightened to the drywall. Overall a great retrofit product.
Date published: 2014-06-10
Rated 5 out of 5 by from Love these boxes Over the years I've used hundreds of these. They're inexpensive and once installed they're rock solid. These require 2 x 4 or 2 x 6 studded walls. For 2 x 3 studded walls use the 14 CU, IN. shallow box.
Date published: 2014-05-31
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