You may also like
4SQBX,STL,30.3CU,1/2&3/4E-KO CSA
Manufacturer Resources
Product Specs
- Idea Granular Category Code Igcc:
- 4438 >> Steel Outlet Boxes
- Number Of Knockouts:
- 13
- Product Group:
- Electrical Boxes
- Product Type:
- Outlet Boxes
- Selling Unit Of Measure:
- each
- Standards:
- UL E2969
- Volume:
- 30.3 in³
- Department:
- Electrical
- Product Subgroup:
- Electrical Boxes
- Product Color:
- Silver
- Product Material:
- Steel
Thomas & Betts 521711234ECN – Frequently Asked Questions
1) How many conductors can I put in a Thomas & Betts 521711234ECN 4 inch square box?
The box has 30.3 cubic inches of volume, so under the NEC box fill table that works out to 15 No. 14 conductors, 13 No. 12, or 12 No. 10, before you deduct for devices, clamps, and grounds. A device on a mud ring costs you two conductor allowances of the largest wire in the box, so a typical 12 AWG circuit with one receptacle leaves you plenty of room for multiple cable runs.
2) What size knockouts does the T&B 521711234ECN square box have?
It comes with combination 1/2 and 3/4 inch eccentric knockouts, 13 of them in total across the sides and back. The combination style means you can punch out just the 1/2 inch ring for smaller EMT or NM connectors, or take the full 3/4 inch for larger conduit, without needing a reducing washer either way.
3) Do I need a separate cover or mud ring for this 4 inch square box?
Yes. The 521711234ECN ships as the box only, sold each, so you add a flat blank cover for a junction box or a raised device ring sized to your wall finish if you are mounting a switch or receptacle. Match the ring's raise depth to the drywall or plaster thickness so the device sits flush.
4) Is this T&B 4 square box UL listed and CSA accepted for a commercial job?
It carries UL file E2969 and is CSA accepted, so it is usable on both US and Canadian projects. If your inspector wants file documentation for the submittal, the UL number to reference is E2969.
5) Is the 521711234ECN box steel or plastic, and can I use it with metal conduit?
Steel, in a silver (galvanized-look) finish. Because the body is metal, it bonds through metal conduit or MC connectors and serves as part of the equipment grounding path, which a nonmetallic box cannot do. That is what you want for EMT, rigid, or armored cable runs.
6) Can I use a 4 square steel box like this one as a junction or pull box rather than a device box?
That is one of its common uses. With 13 knockouts in 1/2 and 3/4 inch sizes and 30.3 cubic inches of volume, it takes multiple conduit runs and splices, then closes up with a flat blank cover. If it is a splice-only box, all of the volume is available for conductors and clamps instead of being eaten by a device.
How fast can I get the Thomas & Betts 521711234ECN 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 Thomas & Betts 521711234ECN come with a warranty?
Absolutely. The Thomas & Betts 521711234ECN 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 Thomas & Betts 521711234ECN?
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 Thomas & Betts 521711234ECN 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.