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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 CTL402 – Frequently Asked Questions
1) What wire size does the Blackburn CTL402 lug take?
The CTL402 compression lug is sized for 4/0 AWG conductor. It is a copper barrel lug, so it is intended for copper cable of that size. If your feeder is a different gauge, you need a different catalog number in the series, since a compression barrel is die-specific to one conductor size.
2) Will the CTL402 bolt to a 1/2 inch stud on my panel or bus bar?
Yes. The tongue is punched for 1/2 inch hardware, so it lands on a 1/2 inch stud or bolt. It is a two-hole tongue, which spreads the torque over two fasteners and keeps the lug from rotating on the pad, so your bus or breaker pad has to have two 1/2 inch holes at the matching spacing.
3) Is the Blackburn CTL402 a compression lug or a mechanical set screw lug?
It is a compression (crimp) barrel lug, not a set screw connector. That means you need a hydraulic or battery crimp tool with the correct die to install it, and once crimped it is not reusable or removable from the conductor. If you want a termination you can install with a hex key and re-terminate later, you want a mechanical lug instead.
4) Can I use the CTL402 to terminate aluminum cable?
No. This is a copper-bodied lug specified for copper conductor. For aluminum or for a mixed copper/aluminum run you need a dual-rated AL9CU connector; putting bare aluminum into a copper-only barrel risks a galvanic and thermal problem at the joint.
5) What does the purple color band on this Blackburn lug mean?
Purple is the die color code for this lug. The barrel is marked purple so the installer knows which compression die and die index to use in the crimp tool, and so an inspector can verify the right die was used after the crimp. Match the tool die to purple, not to the wire size alone.
6) Is the Blackburn CTL402 UL listed for an inspected commercial job?
Yes, it carries UL file E9809. For an electrical inspector on a commercial or institutional installation, that file reference plus a crimp made with the matching purple die is what documents the termination as a listed assembly.
7) Is the CTL402 sold each or in a bag of ten?
Each. One lug per unit, so for a three-phase-plus-neutral 4/0 feeder termination you would order four, and count the far end separately if both ends are being lugged.
8) What is the exact part number and origin for the Blackburn 4/0 two-hole copper lug?
Order it as Blackburn CTL402. Country of origin is Mexico, which is the data a government or institutional procurement file usually needs alongside the UL reference.
How fast can I get the Blackburn CTL402 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 CTL402 come with a warranty?
Absolutely. The Blackburn CTL402 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 CTL402?
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installation tips, and troubleshooting. Contact Us
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