Carlon Blue PVC Adjustable Ele...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$336.16
$313.75
Carlon Blue PVC Adjustable Boxes - Wall and Floor Applications

Carlon Blue PVC Adjustable Electrical Box with Mounting Bracket for Wall and Floor Applications

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Model: B121BFSS

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

$336.16
$313.75
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Carlon Blue PVC Adjustable Electrical Box with Mounting Bracket for Wall and Floor Applications

Professional adjustable mounting solution for versatile electrical installations

The Carlon Blue PVC Adjustable Electrical Box delivers reliable performance for both wall and floor applications with its adjustable bracket mounting system. This professional-grade electrical box features durable blue PVC construction and UL E11461 listing, ensuring code compliance and long-lasting service in residential and commercial installations.

Professional Features & Benefits

  • Adjustable Bracket Design: Provides flexible mounting options for precise positioning in wall and floor applications, accommodating various installation requirements.
  • Blue PVC Construction: Offers excellent durability and corrosion resistance while providing easy identification during installation and inspection.
  • UL E11461 Listed: Ensures compliance with safety standards and building codes for professional electrical installations.
  • Wall and Floor Compatible: Versatile design supports installation in multiple orientations for maximum application flexibility.
  • Zero Knockout Configuration: Clean design allows for custom knockout placement based on specific wiring requirements.
  • US Manufacturing: Made in the United States for consistent quality and reliable supply chain support.

Technical Specifications

  • Country Of Origin: United States (US)
  • Department: Electrical
  • Installation Category: Adjustable Bracket
  • Number Of Knockouts: 0
  • Standards: UL E11461

Professional Applications

  • Residential Electrical Installations
  • Commercial Building Projects
  • Renovation and Retrofit Work
  • New Construction Applications
  • Industrial Facility Wiring
  • Multi-Unit Housing Developments

Why Choose Carlon Quality?

Carlon electrical boxes deliver proven reliability with UL E11461 listing and US manufacturing standards. The durable PVC construction and adjustable bracket system provide long-term performance in demanding electrical applications, backed by consistent quality manufacturing processes.

Manufacturer Resources

Product Specs

Country Of Origin:
United States (US)
Department:
Electrical
Installation Category:
Adjustable Bracket
Number Of Knockouts:
0
Standards:
UL E11461
Product Group:
Old Work/New Work Boxes
Product Type:
Outlet Boxes

Carlon B121BFSS – Frequently Asked Questions

1) Which Carlon B121/B234 box do I order for a floor outlet, and what cover comes with it?
Three of the Carlon blue PVC boxes are built as floor boxes and each ships with its cover. The 1-gang B121BFSS is 20 cubic inches with a stainless steel cover. In 2-gang there are two, both 34 cubic inches: B234BFSS with a stainless steel cover and B234BFBB with a brass cover. Pick the gang count by how many devices you need in the floor, then the cover by what the finished floor has to match.
2) I need a wall box, not a floor box - which Carlon blue PVC adjustable box is the wall version?
Two of them are wall boxes. B121ADJH is the 1-gang, 21 cubic inch horizontal outlet box, and B349ADJ is the 3-gang, 49 cubic inch wall box. The other three numbers in the family (B121BFSS, B234BFSS, B234BFBB) are floor boxes supplied with covers, so don't order one of those for a wall opening.
3) How many conductors will fit in a 21 cubic inch Carlon blue PVC box?
Box fill comes straight off the cubic inch rating stamped on the box. At 21 cubic inches, the B121ADJH gives you room for 10 No. 14 conductors at the 2.0 cubic inch per conductor allowance, and that total has to cover the device (counted as two), any equipment grounds (counted as one together), and any internal clamps. The 3-gang B349ADJ at 49 cubic inches is the one to reach for when three devices plus feed-through and travelers are going in the same box.
4) Are Carlon blue PVC adjustable boxes UL listed for a commercial inspection?
Carlon's blue PVC adjustable box family carries UL listing under file E11461, and that is the number to hand an inspector or drop into a submittal package. It applies across the wall and floor box configurations in the family.
5) Brass or stainless steel floor box cover - what should I put in a 2-gang Carlon floor box?
Same box, same 34 cubic inch 2-gang body, only the cover metal changes. B234BFBB comes with brass, which is what commercial lobbies, hotel spaces and older millwork interiors usually want to match. B234BFSS comes with stainless steel, which reads neutral against concrete, tile and modern trim and is the easier standardization choice across a portfolio. Electrically they are the same order.
6) Do the Carlon blue PVC boxes have knockouts, or do I make my own openings?
Knockout count on these blue PVC boxes is zero, so there are no pre-punched entry openings to plan your runs around. Lay out the cable or conduit entries you actually need before the box goes in the wall or the deck, rather than assuming a factory opening is sitting where your home run lands.
7) What does the adjustable bracket on the Carlon B121ADJH and B349ADJ actually do for me?
These are bracket-mount boxes rather than fixed-depth nail-on boxes. The bracket fastens to the framing and lets you set the box face position on the job, which is how you keep the box flush when the finished wall thickness is not what the layout assumed, or when drywall gets furred out, doubled, or tiled over. That is the reason to spend the money on an ADJ box instead of a fixed one.
8) Can I use one box type for both the floor outlets and the wall outlets on a job?
No, and this is where orders go wrong on this family. The floor versions (B121BFSS, B234BFSS, B234BFBB) are configured for floor service and come with their metal covers; the wall versions (B121ADJH, B349ADJ) are bracket-mount boxes with no cover in the order. Spec them separately by location. The one thing that carries across both is the PVC body and the UL E11461 listing, so you are not mixing listings on the job.
9) Is PVC or metal the right box for a floor outlet in a concrete pour?
Nonmetallic PVC is the usual pick where the box sits in or against concrete and moisture: the body does not corrode, and it needs no bonding of the box itself the way a metal box does, though your equipment grounding still runs to the device. The Carlon floor boxes keep the metal where it earns its place, in the cover you walk on, with stainless steel on B234BFSS and B121BFSS and brass on B234BFBB. Go metal instead when the design calls for a box that is part of a bonded raceway system.
10) Are Carlon blue PVC electrical boxes made in the USA for a domestic-preference spec?
Country of origin on the Carlon blue PVC adjustable boxes is the United States, which is what you need on the line item when a public, institutional or federally funded job carries a domestic sourcing requirement. Pair it with the UL E11461 file number and the submittal is usually complete on the box itself.
How fast can I get the Carlon B121BFSS 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 Carlon B121BFSS come with a warranty?
Absolutely. The Carlon B121BFSS 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 Carlon B121BFSS?
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 Carlon B121BFSS from ZenSupply?
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