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Manufacturer Resources
Product Specs
- Cable Size:
- 350 kcmil
- Country Of Origin:
- Mexico (MX)
- Product Group:
- Wire Termination
- Product Type:
- Aluminum Two-Hole Lug
- 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:
- Brown
- Product Material:
- Aluminum
Blackburn ATL3502 – Frequently Asked Questions
1) What cable size does the Blackburn ATL3502 compression lug take?
The ATL3502 is sized for 350 kcmil conductor. It's a compression lug, so the barrel is crimped onto the cable with the matching die, not torqued down on a setscrew. Run it on 350 kcmil only, one conductor per barrel.
2) Will the ATL3502 bolt to a 1/2 inch bus stud?
Yes. The pad is drilled for 1/2 inch studs, with two holes rather than one, so it lands on a two-hole NEMA-style bus pad or breaker pad drilled for 1/2 inch hardware. Two holes also keep the lug from rotating under fault or vibration, which is why inspectors on switchgear and transformer terminations often want the two-hole version.
3) Can an aluminum compression lug like the ATL3502 be used on copper cable?
The ATL3502 body is aluminum and is a dual-rated AL/CU type per its marking, but the deciding factor is the crimp: an aluminum compression barrel is filled with inhibitor and sized for 350 kcmil aluminum conductor. For copper 350 kcmil, use a copper compression lug instead so the die and barrel match the conductor. Confirm the AL9CU marking stamped on the part before you put copper in it.
4) What does the brown color band on this Blackburn lug mean?
Brown is the die color code on the ATL3502. Compression connectors are color coded so the crimper die matches the barrel, and brown identifies the die index for this 350 kcmil aluminum lug. Match your die to brown rather than guessing by barrel diameter.
5) Should I use a compression lug or a mechanical setscrew lug for a 350 kcmil feeder?
A compression lug such as the ATL3502 is crimped once with a hydraulic tool and cannot be loosened or under-torqued, which is why it's specified for permanent feeder and service terminations and for anything subject to vibration. A mechanical setscrew lug is the choice when you need to install with hand tools, re-terminate later, or you don't own the die set. Both land the same 350 kcmil conductor; the difference is tooling and whether the joint needs to be reusable.
6) Does the ATL3502 come with mounting bolts?
No hardware is included. The lug is supplied on its own, drilled for 1/2 inch studs, so you supply the bolts, nuts and washers (or use the studs already on the bus pad) and torque to the equipment manufacturer's value.
7) Do I order the ATL3502 by the piece or in a box?
It's sold each, so one lug per unit. Count your terminations, not your cable runs, when you order, and remember a three-phase plus neutral feeder needs four.
8) What's the exact part number and where is this Blackburn lug made?
Blackburn ATL3502 is the manufacturer part number, and it's made in Mexico. Use ATL3502 on the submittal so the 350 kcmil, two-hole, 1/2 inch stud configuration is what actually ships.
How fast can I get the Blackburn ATL3502 delivered?
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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 ATL3502 come with a warranty?
Absolutely. The Blackburn ATL3502 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 ATL3502?
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