Crouse-Hinds 4" Steel Square E...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$9.95
Eaton Crouse-Hinds 4" Steel Square Extension Rings - 2-1/8" Deep with Conduit Knockouts

Crouse-Hinds 4" Steel Square Extension Ring 2-1/8" Deep with Conduit Knockouts

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Model: TP443

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

$9.95
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Crouse-Hinds 4" Steel Square Extension Ring 2-1/8" Deep with Conduit Knockouts

Professional electrical box extension for increased wiring capacity

The Crouse-Hinds 4" Steel Square Extension Ring provides reliable electrical box extension with 2-1/8" depth and 30.3 cubic inches of capacity. Constructed from drawn steel for durability in ordinary/non-hazardous locations, this extension ring features multiple conduit knockouts for versatile wiring configurations and meets NEC/CEC standards for professional electrical installations.

Professional Features & Benefits

  • 30.3 Cubic Inch Capacity: Provides ample space for wire connections and electrical components in extended installations.
  • 2-1/8" Depth: Offers optimal extension depth for accommodating additional wiring while maintaining compact profile.
  • Drawn Steel Construction: Ensures long-lasting durability and structural integrity in demanding electrical applications.
  • Multiple Knockout Configuration: Features (8) 1/2" and (4) 3/4" knockouts for flexible conduit entry options.
  • 4" Square Design: Standard sizing ensures compatibility with existing electrical box systems and mounting hardware.
  • NEC/CEC Compliance: Meets national and Canadian electrical code requirements for safe professional installation.
  • Lightweight Design: At 0.66 lb, provides easy handling and installation without compromising structural strength.

Technical Specifications

  • Area Classification: Ordinary/Non-Hazardous Locations
  • Box Size: 4"
  • Capacity: 30.3 cubic in
  • Construction: Drawn
  • Depth: 2-1/8"
  • Product Height: 2.13 in
  • Product Length Depth: 4 in
  • Product Material: Steel
  • Product Weight: .66 lb
  • Product Width: 4 in
  • Side Knockouts: (8) 1/2 in, (4) 3/4 in
  • Standards Type: NEC/CEC

Professional Applications

  • Residential electrical box extensions for additional wiring capacity
  • Commercial building electrical installations requiring extended depth
  • Industrial facility electrical system modifications
  • Retrofit applications where additional wire space is needed
  • Multi-unit residential electrical upgrades
  • Professional electrical contractor installations
  • Maintenance and repair applications requiring code-compliant extensions

Why Choose Crouse-Hinds Quality?

Crouse-Hinds delivers professional-grade electrical components with drawn steel construction and NEC/CEC compliance. This extension ring provides reliable performance in ordinary locations with durable materials and precise manufacturing for long-term electrical system integrity.

Manufacturer Resources

Product Specs

Area Classification:
Ordinary/Non-Hazardous Locations
Box Size:
4"
Capacity:
30.3 cubic in
Construction:
Drawn
Product Height:
2.13 in
Product Length Depth:
4 in
Product Material:
Steel
Product Weight:
.66 lb
Product Width:
4 in
Side Knockouts:
(8) 1/2 in, (4) 3/4 in
Standards Type:
NEC/CEC
Product Depth:
2-1/8"
Department:
Electrical
Product Type:
Box Extension Ring
Product Subgroup:
Electrical Boxes
Product Group:
Boxes & Enclosures

Crouse-Hinds TP443 – Frequently Asked Questions

1) How much extra wire volume does a 2-1/8 inch deep extension ring add for box fill?
30.3 cubic inches, at a 2-1/8 inch depth. That is added to the volume of the box it sits on, so it is the number you use when a box is over-filled and you need to get legal on conductor count. Steel, drawn construction, so it counts as a metal box extension and the ring itself bonds through the mounting screws.
2) What size conduit can I land on the Crouse-Hinds TP443 extension ring?
The sides carry (8) 1/2 in and (4) 3/4 in knockouts, so you can bring in 1/2 or 3/4 trade size conduit or connectors on any side. Anything larger than 3/4 has to enter through the box behind it, not the ring.
3) Is this Crouse-Hinds extension ring code compliant for commercial work in the US and Canada?
It is built to NEC/CEC standards, which is why it shows up on both US and Canadian jobs. For box fill calculations, use the marked 30.3 cubic inch capacity of the ring added to the volume of the box underneath.
4) Is a steel extension ring OK for a damp location or an outdoor box?
Drawn steel, ordinary location rated. It has open knockouts and no gasket, so on its own it is an indoor, dry location part. For a wet or damp exterior box you want a weatherproof cast or die-cast enclosure and gasketed cover rather than this ring.
How fast can I get the Crouse-Hinds TP443 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 Crouse-Hinds TP443 come with a warranty?
Absolutely. The Crouse-Hinds TP443 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 Crouse-Hinds TP443?
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 Crouse-Hinds TP443 from ZenSupply?
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