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Manufacturer Resources
Product Specs
- Cable Size:
- 4/0 AWG
- Country Of Origin:
- Mexico (MX)
- Product Group:
- Wire Termination
- Product Type:
- Long Barrel
- Selling Unit Of Measure:
- each
- Standards:
- UL E9809
- Stud Size:
- 1/2 in
- Sub Brand Label:
- Blackburn
- Type2:
- Cable or wire lug
- Department:
- Electrical
- Product Subgroup:
- Lugs
- Product Color:
- Purple
- Product Material:
- Copper
Blackburn CTL40L-12 – Frequently Asked Questions
1) What wire size does the Blackburn CTL40L-12 lug take?
The CTL40L-12 is a one-hole compression lug sized for 4/0 AWG copper conductor. It is a copper barrel, so use it on copper cable only, not aluminum. One conductor per lug, and it is sold individually.
2) Can I use this lug to terminate aluminum 4/0 feeder?
No. This is a copper-bodied compression lug and should be used on copper conductor. For aluminum or an AL9CU dual-rated termination, order a lug specifically rated for aluminum; putting aluminum in a copper-only barrel is not a listed connection.
3) Why is this copper lug purple, and does the color matter when crimping?
The purple marking is the die color code on the barrel. It tells the installer which crimp die and number of crimps to use, so match your compression tool's purple die index to the barrel. The color is a tooling reference, not a finish.
4) What does a long barrel lug give me over a standard barrel lug?
A long barrel accepts two crimps instead of one, which raises pull-out resistance on the conductor. Electricians specify them for service entrance terminations, generator and transformer connections, and anywhere vibration or high fault current is a concern. If your application is a light branch circuit landing, a standard barrel one-hole lug is sufficient.
5) How many CTL40L-12 lugs do I need for a 4/0 three-phase feeder?
One lug per conductor end. A three-phase feeder with neutral and a 4/0 ground would need five per termination point, and both ends of the run doubles that. They are sold each, so order by conductor count rather than by kit.
6) What is the exact part number and where is the Blackburn CTL40L-12 made?
Order it as Blackburn CTL40L-12. It is manufactured in Mexico. Distributors cross-referencing the line should note the CTL prefix designates the copper long barrel one-hole series, with the -12 suffix indicating the 1/2 inch bolt hole.
How fast can I get the Blackburn CTL40L-12 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 Blackburn CTL40L-12 come with a warranty?
Absolutely. The Blackburn CTL40L-12 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 Blackburn CTL40L-12?
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