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AL TIN 2HOLE NEMA STACK LUG 4
Manufacturer Resources
Product Specs
- Connection Type:
- Compression
- Country Of Origin:
- United States (US)
- Product Group:
- Wire & Cable Management
- Product Type:
- Compression Lug Two Hole Stacking
- Selling Unit Of Measure:
- each
- Standards:
- ANSI C119.4
- Surface Finishing:
- Tin Plated
- Type2:
- Wire connectors
- Wire Size:
- #4 AWG
- Department:
- Electrical
- Product Subgroup:
- Connectors
- Product Size:
- Length 5-1/4 inches X 7/8 inch wide
Blackburn ASL 4 NTN – Frequently Asked Questions
1) What wire size does the Blackburn ASL 4 NTN compression lug take?
The ASL 4 NTN is built for #4 AWG conductor. It is a single-size compression barrel, so it has to be crimped on #4 AWG, not sized up or down with a reducer.
2) Can I use an aluminum lug like the ASL 4 NTN on a copper bus or copper conductor?
The ASL 4 NTN is an aluminum body with a tin plating, which is what makes it dual rated in practice: the tin plate is the barrier that lets an aluminum lug land on copper bus or bolt against copper hardware without direct aluminum to copper contact. The conductor side is still sized for #4 AWG.
3) Will the ASL 4 NTN fit a NEMA standard two hole bus pad?
Yes, the tongue is drilled to the NEMA two hole pattern, so it lands on standard NEMA drilled bus pads and terminal pads. Overall the lug measures 5-1/4 inches long by 7/8 inch wide, so check you have that much clear length in the gutter or termination compartment, especially when you are stacking several of them.
4) Is the ASL 4 NTN a mechanical set screw lug or does it need a crimp tool?
It is a compression lug, so it has to be crimped with a hydraulic or battery powered compression tool using the correct die for the barrel. There is no set screw. If you need a connector you can install with a hex key on site, you want a mechanical lug instead.
5) What does the "stacking" part of a two hole NEMA stack lug mean, and when do I need one?
A stacking lug has a tongue profile that lets two or more lugs bolt down on the same pair of studs without the pads fouling each other, so you can land multiple conductors on one two hole pad. Use it on parallel feeder runs or where a panel, transformer, or switchgear pad has fewer landing points than you have conductors. If you only have one conductor per pad, a standard two hole lug does the same job.
6) Does the Blackburn ASL 4 NTN meet a recognized connector standard for inspection?
It is built to ANSI C119.4, the standard covering connectors for aluminum and copper conductors. That is the reference an inspector or spec writer typically looks for on a power connector submittal.
7) Is the Blackburn ASL 4 NTN made in the USA for a Buy American job?
Country of origin is the United States, which is what a government, school, or federally funded project submittal usually asks for on the connector line item.
8) What part number do I order for the Blackburn #4 AWG tin plated aluminum stacking lug?
Order Blackburn ASL 4 NTN. That is the full catalog designation: aluminum stacking lug, #4 AWG, tin plated, two hole NEMA tongue.
9) Are Blackburn ASL 4 NTN lugs sold individually or in packs?
They are sold each, so order one per conductor termination. On a stacked two hole pad, count every conductor landing on that pad plus any spares you want on the truck.
How fast can I get the Blackburn ASL 4 NTN 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 ASL 4 NTN come with a warranty?
Absolutely. The Blackburn ASL 4 NTN 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 ASL 4 NTN?
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installation tips, and troubleshooting. Contact Us
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