Topaz Lighting 311 Rigid Insul...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$0.21
Topaz Lighting 311 Rigid Insulated Bushing, Zinc Die-Cast

Topaz Lighting 311 Rigid Insulated Bushing, Zinc Die-Cast

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Model: 311

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

$0.21
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Topaz Lighting 311 Rigid Insulated Bushing, Zinc Die-Cast with Thermoplastic Liner

Topaz Lighting's Rigid Insulated Bushing is engineered to protect conductors at rigid conduit terminations, shielding cables from abrasion caused by sharp conduit edges. Constructed from corrosion-resistant zinc die-cast with a flame-retardant thermoplastic liner rated to 105°C, this bushing is available in trade sizes from 1/2" to 4" to fit a wide range of rigid conduit installations. UL Listed and engineered for fast, reliable installation, it is well suited to communications, television, and security system wiring in commercial and industrial settings where conductor integrity at the conduit termination is critical to a code-compliant installation.

Key Features

  • Trade Size Range: Available in sizes from 1/2" to 4" to accommodate a broad range of rigid conduit installations.
  • Durable Construction: Corrosion-resistant zinc die-cast body provides long-lasting mechanical strength and resistance to harsh commercial and industrial environments.
  • Insulated Thermoplastic Liner: Integrated thermoplastic liner is certified flame retardant to 105°C, offering maximum protection against cable abrasion at sharp conduit edges.
  • Cable Protection: Specifically designed to prevent damage to conductors from sharp rigid conduit edges, reducing the risk of insulation failure and downstream faults.
  • Easy Installation: Engineered for quick, straightforward field installation across the full range of available trade sizes.
  • Ideal Application Fit: Well-suited for communications, television, and security system wiring installations where conductor integrity is critical.

Certifications & Compliance

  • UL Listed
  • Thermoplastic Liner Certified Flame Retardant to 105°C

Technical Specifications

  • Conduit Type: Rigid/IMC
  • Pack Size: 100

Typical Applications

  • Rigid Conduit Terminations in Commercial and Industrial Electrical Systems
  • Communications and Low-Voltage Wiring Installations
  • Television and Audio/Visual System Conduit Runs
  • Security and Access Control System Wiring
  • New Construction and Renovation Electrical Projects
  • Any Application Requiring Cable Abrasion Protection at Rigid Conduit Ends

Why Topaz Lighting?

Topaz Lighting's Rigid Insulated Bushings are built from corrosion-resistant zinc die-cast with a flame-retardant thermoplastic liner rated to 105°C, delivering reliable, code-compliant cable protection at conduit terminations across the full 1/2" to 4" trade size range. Their UL Listed rating and easy-install design make them a trusted choice for professional electricians and contractors handling rigid conduit terminations in communications, television, and security system installations.

Product Specs

Product Type:
Insulated Bushing
Conduit Type:
Rigid/IMC
Listing:
UL Listed
Department:
Electrical
Product Group:
Conduit & Raceway
Product Subgroup:
Conduit Bodies & Fittings
Product Material:
Zinc Die-Cast
Pack size (unit):
100
Product Size:
1/2" - 4"

Topaz Lighting 311 – Frequently Asked Questions

1) Will the Topaz 311 insulated bushing thread onto IMC as well as rigid conduit?
Yes. The Topaz 311 insulated bushing is made for Rigid/IMC conduit, so it threads onto either. Trade sizes run 1/2 inch through 4 inch, and you order the size that matches the conduit trade size, not the conductor.
2) Is this bushing UL Listed for a commercial inspection?
Yes, the Topaz rigid insulated bushing is UL Listed, and the thermoplastic liner is certified flame retardant to 105 C. That is the combination an inspector looks for at a rigid conduit termination where conductors leave the raceway.
3) What sizes does the Topaz rigid insulated bushing come in, and which part number is which?
Eight trade sizes. 1/2 inch is part 311, 1 inch is 313, 1-1/4 inch is 3-1/4, 1-1/2 inch is 315, 2-1/2 inch is 317, 3 inch is 318, 3-1/2 inch is 319, and 4 inch is 320.
4) Do I need an insulated bushing on every rigid conduit end, or just some?
Use one wherever conductors exit a rigid or IMC termination and would otherwise bear on the cut thread edge. That is the job this Topaz bushing does: the thermoplastic liner covers the sharp edge so conductor insulation is not abraded. It is common practice on communications, television, and security system runs where the cable jackets are thin and a nicked conductor shows up later as a fault.
5) How many bushings come in a box?
The Topaz rigid insulated bushings are packed 100 per unit, so a single order covers a full rough-in rather than a handful of terminations. Buy by trade size, since each size is a separate part number.
6) Will zinc die-cast bushings hold up in a damp or corrosive industrial area?
The body is corrosion-resistant zinc die-cast, which is the standard choice for rigid conduit terminations in commercial and industrial environments. For genuinely wet or chemically aggressive locations, the bushing is only one part of the termination, so match it to the rest of your listed fitting system for that environment.
How fast can I get the Topaz Lighting 311 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 Topaz Lighting 311 come with a warranty?
Absolutely. The Topaz Lighting 311 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 Topaz Lighting 311?
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 Topaz Lighting 311 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.
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