Thomas & Betts Copper Lay-In L...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$74.46
$10.59
Thomas & Betts CULL4-14 COPPER LAY IN LUG No14 TO No4 AWG

Thomas & Betts Copper Lay-In Lug 14-4 AWG Mechanical Grounding Connector

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Model: CULL4-14
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$74.46
$10.59
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Thomas & Betts Copper Lay-In Lug 14-4 AWG Mechanical Grounding Connector

Professional copper grounding solution for 14-4 AWG applications

The Thomas & Betts Copper Lay-In Lug delivers reliable mechanical grounding performance for electrical installations requiring secure conductor connections from 14 AWG to 4 AWG. This professional-grade copper connector ensures dependable grounding integrity with lay-in design for efficient installation and long-term electrical safety.

Professional Features & Benefits

  • 14-4 AWG Wire Range: Accommodates multiple conductor sizes for versatile grounding applications and installation flexibility
  • Copper Construction: Provides excellent conductivity and corrosion resistance for reliable long-term grounding performance
  • Lay-In Design: Enables efficient conductor installation without complex threading or manipulation for faster connections
  • Mechanical Grounding: Delivers secure mechanical connection ensuring consistent electrical continuity and safety compliance
  • UL Listed: Meets UL E9809 standards for verified safety and performance in professional electrical installations
  • Professional Grade: Thomas & Betts quality construction ensures dependable service in demanding electrical environments

Technical Specifications

  • Department: Electrical
  • Idea Granular Category Code Igcc: 4909 >> Grounding devices or assemblies
  • Insulation Material: No
  • Material Of Conductor: Copper
  • Product Group: Connectors
  • Product Subgroup: Lugs
  • Product Type: Mechanical Grounding
  • Selling Unit Of Measure: each
  • Standards: UL E9809

Professional Applications

  • Electrical Panel Grounding Systems
  • Commercial Building Grounding
  • Industrial Equipment Grounding
  • Residential Service Grounding
  • Equipment Bonding Applications
  • Electrical Safety Grounding
  • Code Compliance Installations

Why Choose Thomas & Betts Quality?

Thomas & Betts delivers proven reliability with UL E9809 listed performance and professional-grade copper construction. This mechanical grounding connector provides the dependable electrical safety and installation efficiency that electrical professionals trust for critical grounding applications.

Manufacturer Resources

Spec Sheet

Product Specs

Idea Granular Category Code Igcc:
4909 >> Grounding devices or assemblies
Insulation Material:
No
Material Of Conductor:
Copper
Product Group:
Grounding & Bonding
Product Type:
Grounding Connector
Selling Unit Of Measure:
each
Standards:
UL E9809
Department:
Electrical
Product Subgroup:
Grounding & Bonding

Thomas & Betts CULL4-14 – Frequently Asked Questions

1) What wire sizes does the Thomas & Betts CULL4-14 lay-in lug accept?
The CULL4-14 takes copper conductors from 14 AWG up to 4 AWG, so one part covers everything from a small equipment bonding jumper to a heavier grounding electrode conductor on a panel. It is a mechanical grounding connector, so the conductor is clamped under a setscrew rather than crimped.
2) Can I use this lug on aluminum ground wire?
No. The CULL4-14 is a copper-bodied lug listed for copper conductors, so run it with copper ground wire only. For aluminum or a mixed copper/aluminum run you need a connector rated AL9CU or dual-rated for that combination.
3) Is the Thomas & Betts CULL4-14 grounding lug UL listed for inspection sign-off?
Yes. It carries UL file E9809, which is what an inspector will look for on a grounding or bonding connection. Use it within its listed 14-4 AWG copper range to keep that listing valid.
4) I ordered a CULL4-14 but my ground conductor is 2 AWG. Will it fit?
No, 2 AWG is outside the range. The CULL4-14 tops out at 4 AWG copper. Forcing a larger conductor into the channel will not give you a listed connection, so step up to a lay-in lug whose printed range covers 2 AWG.
5) What does lay-in mean on this grounding lug, and why does it matter in a crowded panel?
Lay-in means the conductor drops into an open channel from the side instead of being threaded through a closed barrel. In a loaded panel or a box where the ground wire is already terminated at one end, that saves you pulling the whole conductor back out. Back off the setscrew, lay the wire in, torque it down.
6) Will this work for bonding equipment enclosures and panel ground bars, or only service grounding?
Both. The CULL4-14 is used for electrical panel grounding, commercial and industrial equipment grounding, residential service grounding, and general equipment bonding. The deciding factor is the conductor: copper, 14 through 4 AWG.
7) Does the CULL4-14 come insulated?
No insulation. The CULL4-14 is a bare copper lug, which is normal for grounding and bonding where the connection is intended to be metal-to-metal and visible for inspection. If you need the termination covered, plan on separate heat shrink or an insulating boot.
8) Is this lug sold individually or in a bag of multiples?
It is sold each, so quantity on an order is the number of lugs you receive. For a service upgrade or a multi-panel bonding job, count your terminations and order accordingly.
How fast can I get the Thomas & Betts CULL4-14 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 CULL4-14 come with a warranty?
Absolutely. The Thomas & Betts CULL4-14 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 CULL4-14?
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
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