Thomas & Betts High-Temperatur...
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Thomas & Betts 10-411 Wire Connectors & Termination

Thomas & Betts High-Temperature Porcelain Wire Connectors 300V #18-14 AWG

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Model: 10-411
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Thomas & Betts High-Temperature Porcelain Wire Connectors 300V #18-14 AWG

Professional High-Temperature Wire Connection Solutions

Thomas & Betts delivers reliable wire connection performance with these professional-grade porcelain wire connectors designed for high-temperature applications over 105�C (221�F). These 300V rated connectors accommodate #18-14 AWG stranded copper conductors and feature durable white porcelain construction for demanding electrical installations requiring superior temperature resistance and reliable termination.

Professional Features & Benefits

  • High Temperature Rating Over 105�C (221�F): Ensures reliable performance in demanding thermal environments where standard connectors may fail.
  • 300V Voltage Rating: Provides safe operation in residential and commercial electrical systems with appropriate voltage capacity.
  • Porcelain Construction: Delivers exceptional durability and thermal stability for long-term reliability in harsh conditions.
  • #18-14 AWG Conductor Range: Accommodates common stranded copper wire sizes for versatile installation applications.
  • UL E9809 & CSA 6591 Listed: Meets rigorous safety standards for professional electrical installations and code compliance.
  • White Color Coding: Provides clear identification and professional appearance in electrical enclosures and junction boxes.

Technical Specifications

  • Color: White
  • Conductor Range: #18-14 AWG
  • Department: Electrical
  • Material: Porcelain
  • Outer Dimensions Inches: 5.4x5.2x9.2
  • Outer Quantity: 1000
  • Product Details: Wire Connectors & Termination
  • Product Group: Connectors
  • Product Subgroup: Electrical Connectors
  • Product Type: Wire Connectors & Termination
  • Standard: UL E9809, CSA 6591
  • Temperature Rating: Over 105 Degrees Celsius (221 F)
  • Unspsc: 39121445 Twist on wire connector
  • Voltage Rating: 300V
  • Weight Uom: 1 lbs. per 100

Professional Applications

  • High-Temperature Industrial Equipment Connections
  • Commercial HVAC System Wiring
  • Manufacturing Facility Electrical Installations
  • Process Control System Terminations
  • Professional Electrical Panel Connections
  • Maintenance and Repair Operations

Why Choose Thomas & Betts Quality?

Thomas & Betts wire connectors deliver proven reliability with UL E9809 and CSA 6591 listings, ensuring code compliance and professional performance. The porcelain construction and high-temperature rating over 105�C provide exceptional durability for demanding electrical applications requiring superior thermal resistance and long-term connection integrity.

Manufacturer Resources

Product Specs

Wire Size:
#18-14 AWG
Outer Dimensions Inches:
5.4x5.2x9.2
Outer Quantity:
1000
Product Group:
Connectors
Standards:
UL E9809, CSA 6591
Temperature Rating:
Over 105 Degrees Celsius (221 F)
Unspsc:
39121445 Twist on wire connector
Voltage Rating:
300V
Weight Uom:
1 lbs. per 100
Department:
Electrical
Product Subgroup:
Electrical Connectors
Product Type:
Wire Connectors & Termination
Product Details:
Wire Connectors & Termination
Product Color:
White
Product Material:
Porcelain

Thomas & Betts 10-411 – Frequently Asked Questions

1) Can I use a porcelain wire connector on a fixture whose leads run hotter than a standard wire nut can take?
That is the whole point of the Thomas & Betts 10-411 porcelain connector. It is rated for service over 105 degrees Celsius (221 F), which is where ordinary thermoplastic twist-on connectors stop. Typical uses are high-temperature light fixtures, heaters, commercial HVAC equipment and industrial process wiring. Voltage rating is 300V.
2) What wire sizes fit the Thomas & Betts 10-411 porcelain connector?
It takes #18 through #14 AWG copper conductors. If your splice includes a #12 or larger, this is the wrong size connector, and mixing a conductor outside that range into the cap is not a legal splice.
3) Are these porcelain wire nuts UL listed for code compliance on a commercial job?
They carry UL file E9809 and CSA 6591. That covers both US and Canadian inspection on an institutional or commercial install.
4) Is a 300V connector acceptable on a standard 120/277V branch circuit?
Yes. The 10-411 is rated 300V, which covers 120V and 277V line-to-neutral lighting and equipment circuits. It is not for use where the circuit voltage between conductors in the splice exceeds 300V, so 480V three-phase feeders need a 600V-rated connector instead.
5) Do porcelain wire connectors work the same way as a plastic wire nut, or do they need a different install?
Same twist-on method, different shell. The 10-411 is a twist-on wire connector (UNSPSC 39121445) with a porcelain body instead of thermoplastic. Strip and twist as usual, but treat the shell as brittle: porcelain will crack if you over-torque it with pliers or drop it on a hard deck, where a nylon cap would just flex.
6) What is the manufacturer part number to order these porcelain connectors by?
Thomas & Betts part number 10-411. That is the #18-14 AWG, 300V, high-temperature porcelain twist-on connector in white.
7) How are the 10-411 connectors packed, and what does a full carton weigh out at?
Outer pack is 1,000 pieces, with a carton measuring 5.4 x 5.2 x 9.2 inches. Weight is published as 1 lb per 100 pieces, so a full 1,000-count carton runs about 10 lbs of product.
8) Is the white color on these connectors a size code I need to match to my existing connectors?
White here is the color of the porcelain body, not a wire-range code the way colored plastic caps work. Match on the stated range instead: this one is #18-14 AWG. If you are standardizing a building on one connector, spec by AWG range and temperature rating, not by cap color.
How fast can I get the Thomas & Betts 10-411 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 10-411 come with a warranty?
Absolutely. The Thomas & Betts 10-411 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 10-411?
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 10-411 from ZenSupply?
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