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Cantex PVC Junction Box, Non-Metallic Conduit Enclosure
The Cantex PVC Junction Box is a durable, non-metallic enclosure engineered for splicing, pulling, and protecting electrical conductors in conduit systems. Molded from rugged PVC, this junction box resists corrosion, moisture, and chemical exposure far better than traditional metallic boxes, making it a reliable choice for demanding electrical installations. This family is available in box dimensions ranging from 8" x 8" x 4" up to 12" x 12" x 6", giving electricians and contractors a consistent, dependable enclosure profile to match the wiring capacity required for a given run. Whether used in commercial, industrial, or utility applications, this PVC junction box delivers a lightweight yet tough solution for housing conductor splices and providing convenient access points along a conduit run.
Key Features
- Box Dimensions: Available from 8" x 8" x 4" up to 12" x 12" x 6", providing ample interior volume for conductor splicing, pulling, and termination across a range of job requirements.
- Durable PVC Construction: Non-metallic PVC material resists corrosion, rust, and chemical degradation, extending service life versus metallic enclosures.
- Junction Box Configuration: Purpose-built as a junction box for use with PVC and compatible conduit systems, simplifying access and maintenance.
- Lightweight Design: PVC construction reduces overall weight compared to steel or aluminum boxes, easing handling and installation.
- Non-Conductive Material: PVC construction adds a layer of electrical insulation not found in metallic junction boxes.
- Consistent Fit Across Sizes: Each size in the range is molded to a predictable, repeatable profile for consistent installations across a job site, from the compact 8" x 8" x 4" option to the larger 12" x 12" x 6" option.
Technical Specifications
- Product Type: PVC Junction Box
- Box Dimension Range: 8" x 8" x 4" to 12" x 12" x 6"
- Material: PVC
Typical Applications
- Commercial and Industrial Electrical Installations
- PVC Conduit and Raceway Systems
- Underground and Corrosive Environment Wiring
- Splice and Pull Points Along Conduit Runs
- Renovation and New Construction Projects
Why Cantex?
Cantex is a trusted manufacturer of PVC electrical and conduit products, known for durable, corrosion-resistant construction suited to demanding job site conditions. This Cantex junction box family reflects that same commitment to dependable, code-compliant performance for professional electrical work, giving contractors a non-metallic enclosure option that stands up to moisture and chemical exposure over the long term, no matter which size in the 8" x 8" x 4" to 12" x 12" x 6" range best fits the application.
Manufacturer Resources
Product Specs
- Product Type:
- Junction Box
- Department:
- Electrical
- Product Subgroup:
- Electrical Boxes
- list_batch:
- CAN-20260924
- Product Material:
- PVC
- Product Size:
- 8" x 8" x 4" - 12" x 12" x 6"
- Product Group:
- Boxes & Enclosures
Cantex 5133712 – Frequently Asked Questions
1) What sizes does the Cantex PVC junction box come in?
Two sizes: 8 x 8 x 4 inches (MPN 5133712) and 12 x 12 x 6 inches (MPN 5133713). Pick by the number and size of conductors you have to splice and the bending room you need at a pull point, the 6 inch depth on the larger box gives noticeably more room to work large conductors than the 4 inch depth.
2) Can I use a PVC junction box in a corrosive or wet environment instead of a steel box?
That is the main reason to choose it. The Cantex box is molded PVC, so it resists corrosion, moisture and chemical exposure where a steel enclosure would rust out. Typical uses are underground and corrosive-environment wiring, and splice or pull points along PVC conduit runs. Steel options like the Orbit 4SDB welded steel square box are the wrong material for those conditions.
3) What non-metallic junction box works for a smaller splice point than an 8 x 8 x 4?
The Cantex PVC junction box family starts at 8" x 8" x 4" and goes up to 12" x 12" x 6", so for a tighter splice point the Carlon E987R polycarbonate screw-cover junction box measures 6" x 6" x 4" and is also a non-metallic enclosure. Both keep the run non-conductive and corrosion resistant; the Cantex sizes give far more interior volume for multi-conductor pulls and terminations.
4) Is a non-metallic junction box non-conductive, and does that mean I skip bonding?
PVC is non-conductive, so the enclosure itself adds insulation that a metal box does not. That means the box is not part of an equipment grounding path, so any equipment grounding conductors in the run have to be spliced through inside the box rather than bonded to the enclosure.
5) What conduit does the Cantex PVC junction box work with?
It is built for PVC and compatible conduit systems as a splice, pull and termination point along the run. Because it is a non-metallic enclosure, it pairs naturally with rigid PVC raceway rather than being the obvious choice for a metallic raceway system.
6) Is this the right box for mounting a device like a switch or receptacle?
No. This is a junction box for splicing, pulling and protecting conductors along a conduit run, not a device box. For device work in a stud wall you want a 4 inch square box such as the Orbit D4SB drawn steel 1-1/2 inch deep square box or the Orbit 4SDB deep square box.
7) For a corrosive or wet environment, should I use the Cantex PVC box or a steel box?
The Cantex junction box is molded PVC, which resists corrosion, moisture, and chemical exposure and adds electrical insulation that metallic boxes do not have, which is why it is used for underground and corrosive environment wiring. The Orbit 4SDB welded steel and Orbit D4SB drawn steel boxes are metallic enclosures. Where chemical or moisture exposure is the governing condition, the non-metallic Cantex or the polycarbonate Carlon E987R are the material-appropriate choices.
8) What is the difference between the Cantex PVC junction box and the Carlon E987R?
Both are non-metallic enclosures. The Carlon E987R is polycarbonate with a screw-cover lid at 6" x 6" x 4". The Cantex is molded PVC and ranges from 8" x 8" x 4" to 12" x 12" x 6", built for splicing, pulling, and protecting conductors in PVC conduit systems. The choice comes down to the enclosure volume the conductor count requires and whether a PVC or polycarbonate body suits the environment.
9) Will the two Cantex box sizes look and install consistently across a job site?
Yes, both the 8 x 8 x 4 and the 12 x 12 x 6 are molded to a repeatable profile, so a facility standardizing on one enclosure family gets the same look and the same install routine whichever size an opening in the run calls for.
10) Are PVC junction boxes easier to handle on a ladder than steel ones?
Noticeably. PVC weighs less than steel or aluminum for the same box size, which matters on a 12 x 12 x 6 enclosure being set overhead or on a pole by one person.
11) I need boxes in bulk quantity for a large job. What are my options versus the Cantex PVC junction box?
The Cantex PVC junction box is sold by box size, 8" x 8" x 4" (MPN 5133712) and 12" x 12" x 6" (MPN 5133713). If the job calls for many small steel device boxes rather than large pull points, the Orbit D4SB 1-1/2" deep 4" square drawn steel junction box is offered in a pack of 100. They serve different roles: the Orbit for high-count device and fixture boxes, the Cantex for larger non-metallic splice and pull enclosures.
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Does the Cantex 5133712 come with a warranty?
Absolutely. The Cantex 5133712 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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