You may also like
Centaur 1-Gang Plastic Switch Boxes – Nail-On, 18–22 cu in (per 100)
Model: TAMCO-PSB-NO-100
Centaur 1-gang plastic nail-on switch boxes are built for new work residential and light commercial electrical installations. Made from high-strength non-metallic material, these boxes come in 18,...
Centaur
Starting at
$128.19
Centaur 2-Gang Plastic Switch Box – 44 cu in, Nail-On (per 60)
Model: TAMCO-PSB-NO-60
The Centaur PSB244 is a 2-gang plastic switch box designed for new work electrical installations. With a spacious 44 cubic inch capacity, it provides ample room for wiring larger device setups. Its...
Centaur
$213.03
Centaur 2-Gang Plastic Switch Box – 32 cu in, Nail-On (per 50)
Model: TAMCO-PSB-NO-50
The Centaur PSB232 is a 2-gang plastic switch box designed for new work applications in residential and light commercial environments. With a 32 cubic inch capacity, it provides sufficient space for...
Centaur
$155.25
Centaur Plastic Switch Boxes – 3–4 Gang, Nail-On, 44–87 cu in (per 30))
Model: TAMCO-PSB-NO-30
Centaur 3-gang and 4-gang plastic nail-on switch boxes are built for new construction electrical installations where high-capacity wiring is required. These non-metallic boxes offer spacious cubic...
Centaur
Starting at
$220.97
Red 1-Gang Plastic Switch Boxes – Nail-On, 18 to 22 Cu. In.
These vibrant red 1-gang plastic switch boxes are designed for new construction applications, providing high visibility and reliable performance in residential or light commercial electrical projects. Constructed from non-conductive, flame-retardant thermoplastic, they are durable, easy to install, and resistant to impact and corrosion.
| Stock Code | Length | Width | Height |
|---|---|---|---|
| PSB118R | 2.88 Inches | 2.25 Inches | 3.75 Inches |
| PSB120R | 3.25 Inches | 2.25 Inches | 3.875 Inches |
| PSB122R | 3.5 Inches | 2.25 Inches | 3.75 Inches |
PSB118R
Product Specs
- Box Type:
- Plastic Switch Box – Nail-On
- Gang Options:
- 1-Gang
- Product Type:
- Switch Box
- Application:
- Installing single gang outlets or switches with visual identification
- Color Options:
- Red
- Cubic Capacity:
- 18 / 20 / 22 cu in
- Mounting Feature:
- Nail-On
- Product Group:
- Electrical Boxes
- Product Subgroup:
- Junction Boxes
- Product Material:
- Plastic
- Department:
- Electrical
Centaur PSB118R – Frequently Asked Questions
1) What is the difference between the 18, 20 and 22 cu in Centaur red plastic switch boxes?
The difference is box depth and the resulting wire fill volume. The PSB118R measures 2.88 x 2.25 x 3.75 inches, the PSB120R 3.25 x 2.25 x 3.875 inches, and the PSB122R 3.5 x 2.25 x 3.75 inches. All three are 1-gang nail-on boxes in red. Pick the capacity by how many conductors, devices and grounds land in the box: more circuits or a pigtailed run wants the 22 cu in.
2) Can I use a nail-on plastic box in an existing finished wall, or is it new construction only?
Nail-on is a new-construction mount. The box nails directly to the face of a stud before drywall goes up, so you need open framing. For cutting into finished drywall you want an old-work (remodel) box with wing clamps instead, since there is no stud face to nail to.
3) Why is this Centaur switch box red instead of blue?
The red color is for visual identification on the job. Crews commonly color-code boxes so a particular circuit type or system is spotted instantly during rough-in and later during service, rather than tracing wire. Electrically it is the same non-metallic 1-gang nail-on box; the color just tells you which boxes on the wall belong to that group.
4) Will a standard single-gang switch or receptacle mount in the Centaur PSB118R box?
Yes. These are 1-gang boxes intended for a single switch or a single duplex receptacle, and the device screws into the box ears. One device per box; for two devices side by side you need a 2-gang box.
5) Are these red plastic boxes OK for a commercial job or only residential?
Centaur lists them for residential and light commercial electrical work. They are not metal, so on jobs where the spec calls for metallic boxes and conduit, or anywhere the drawing requires a metal raceway system, these will not meet the spec.
6) Do I need to run a ground to a plastic box?
The box body itself is non-conductive, so there is nothing to bond on the box. The equipment ground lands on the device and is spliced through with the branch circuit grounds. Count those grounds when you size the box: that is part of why the 22 cu in version exists alongside the 18.
7) How many switch boxes come in a case?
The red 1-gang Centaur nail-on switch boxes are sold in quantities of 100 per pack, which is how most rough-in crews buy them for a full house or floor.
8) Is the plastic in these boxes flame retardant?
The boxes are molded from non-conductive, flame-retardant thermoplastic, and the material also resists impact and corrosion, which matters in damp basement or garage framing where steel boxes can rust.
How fast can I get the Centaur PSB118R 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 Centaur PSB118R come with a warranty?
Absolutely. The Centaur PSB118R 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 Centaur PSB118R?
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 Centaur PSB118R from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.