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Manufacturer Resources
Product Specs
- Country Of Origin:
- United States (US)
- Number Of Knockouts:
- 12
- Product Type:
- Electrical box extension
- Selling Unit Of Measure:
- each
- Standards:
- UL E2969
- Volume:
- 30.3 in³
- Department:
- Electrical
- Product Group:
- Electrical Enclosures
- Product Subgroup:
- Boxes
- Product Type2:
- Extension Rings
- Product Size:
- 4 Inches Length x 4 Inches Width x 2-1/8 Inches Depth
- Product Color:
- Red
- Product Material:
- Steel
Steel City 53171-1234RD – Frequently Asked Questions
1) How much extra cubic-inch capacity does a 2-1/8 inch deep 4-square extension ring add for conductor fill?
The 53171-1234RD adds 30.3 cubic inches of volume. That is the number you add to the box's own listed volume when you run the box fill calculation for the conductors, devices and clamps in the opening.
2) How many knockouts are on the Steel City 53171-1234RD extension ring?
Twelve knockouts, spread around the ring so you can bring conduit or cable in from any side after the original box is already set. That is what makes an extension ring useful when you need added raceway entries as well as added depth.
3) Why is this Steel City 4-square extension ring red instead of galvanized?
Red is the identifying color used for fire alarm and life-safety circuits, so crews can tell those boxes apart from general power at a glance during rough-in and inspection. The 53171-1234RD is a red-finished steel extension ring for that purpose.
4) Is this red 4-square extension ring UL listed?
It carries UL listing under file E2969.
5) Should I use an extension ring or replace the box with a deeper one?
An extension ring is the move when the box is already set in the wall or ceiling and you cannot get at it to swap it. The 53171-1234RD bolts to the face of an existing 4 inch square box and gives you another 2-1/8 inches of depth plus 30.3 cubic inches of fill capacity, with twelve knockouts for added conduit runs. If the box is not yet installed, setting a deeper box in the first place is the cleaner job.
6) Does the Steel City 53171-1234RD come in a carton or is it sold singly?
It is sold each, so you order the exact count you need rather than a full carton.
7) Is the Steel City 53171-1234RD made in the USA?
Country of origin is the United States, which matters on federal, municipal and institutional jobs carrying domestic-sourcing requirements.
How fast can I get the Steel City 53171-1234RD 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 Steel City 53171-1234RD come with a warranty?
Absolutely. The Steel City 53171-1234RD 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 Steel City 53171-1234RD?
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 Steel City 53171-1234RD from ZenSupply?
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and
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every order.
Our team is always ready to help you choose the right product for your project.