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Manufacturer Resources
Product Specs
- Cable Size:
- 4/0 AWG
- Country Of Origin:
- Mexico (MX)
- Product Group:
- Wire Termination
- Product Type:
- Standard 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 CTL40-12 – Frequently Asked Questions
1) What wire size does the Blackburn CTL40-12 compression lug take?
The CTL40-12 is sized for 4/0 AWG copper conductor. It is a copper compression lug, so it terminates copper cable only, not aluminum. The purple color code on the barrel is the die/size identifier crimpers use to confirm they are on the right conductor size before compressing.
2) Will the Blackburn CTL40-12 lug bolt to a 1/2 inch stud on my panel bus?
Yes. The CTL40-12 has a single bolt hole sized for a 1/2 inch stud, and it is a one-hole tongue, so it lands on a single 1/2 inch stud or bolt on a bus bar, breaker pad or ground bar.
3) Can I use the Blackburn CTL40-12 on aluminum cable?
No. This is a copper-bodied lug rated for copper conductor only. Putting aluminum cable in a copper-only barrel is not an approved termination. For aluminum feeders you need a lug marked AL9CU or aluminum-rated.
4) Is the CTL40-12 a mechanical set screw lug or a crimp lug?
It is a compression (crimp) lug with a short barrel, not a set screw mechanical connector. You install it with a hydraulic or battery crimp tool and the die matched to the purple 4/0 copper code. If you need a lug you can install with a hex key and no tooling, a mechanical set screw lug is the type to look for instead.
5) Does the CTL40-12 come as a single lug or in a bag of multiples?
It sells individually, one lug per unit. For a three-phase feeder plus neutral you would order four, and add one more for the ground if it is also 4/0.
6) Where is the Blackburn CTL40-12 made?
The CTL40-12 is manufactured in Mexico. Buyers working to domestic-content or country-of-origin requirements on a public project will want that on record before submittal.
How fast can I get the Blackburn CTL40-12 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 Blackburn CTL40-12 come with a warranty?
Absolutely. The Blackburn CTL40-12 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 CTL40-12?
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 Blackburn CTL40-12 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.