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AL COMP LUG 500 4HOLE NEMA
Manufacturer Resources
Product Specs
- Connection Type:
- Compression
- Country Of Origin:
- United States (US)
- Insulation Material:
- None
- Product Group:
- Wire & Cable Management
- Product Type:
- Compression Lug Four Hole
- Selling Unit Of Measure:
- each
- Standards:
- ANSI C119.4
- Type2:
- Wire connectors
- Wire Size:
- 500 kcmil
- Department:
- Electrical
- Product Subgroup:
- Connectors
- Product Size:
- Nominal Length 7.625 inches, Barrel 3.750 inch, Pad .625 inch thick, 3 inches wide.
Blackburn AL 500-4 N – Frequently Asked Questions
1) What wire size does the Blackburn AL 500-4 N compression lug take?
The AL 500-4 N is sized for 500 kcmil conductor. It is a compression lug, so the barrel is crimped onto the conductor with a die-type compression tool rather than tightened with a set screw. The barrel is 3.750 inches long, which is the crimp area you need clearance for behind the pad.
2) Will a four-hole NEMA lug like the AL 500-4 N land on my switchgear bus pad?
It is drilled to the four-hole NEMA pattern, so it lands on gear and bus pads prepped for a standard four-hole NEMA drilling. The tongue is 3 inches wide and .625 inch thick, so confirm your pad has 3 inches of clear width and that the bolt stack still makes up with a .625 inch pad in it.
3) How much room do I need in the termination cabinet for this 500 kcmil lug?
Allow for 7.625 inches nominal overall length, with 3.750 inches of that being the compression barrel. In a tight gutter or termination compartment that length plus the conductor bend radius is usually the limiting factor, not the pad.
4) Is the Blackburn AL 500-4 N aluminum lug rated for copper conductor too?
It is an aluminum body lug for 500 kcmil. Aluminum compression connectors of this type are commonly dual rated, but rating is what decides an inspection, so go by the AL/CU marking stamped on the barrel and the ANSI C119.4 listing it carries for the conductor you are landing.
5) What standard does this Blackburn compression lug meet?
ANSI C119.4, the standard covering connectors for use between aluminum and copper conductors. That is the reference a spec section or a plan reviewer will ask for on a 500 kcmil feeder termination.
6) Is this Blackburn lug made in the USA for a Buy American job?
Country of origin on the AL 500-4 N is the United States, which is what a federally funded or Buy American specified project will want documented for the connector.
7) What is the exact part number to order this 500 kcmil four-hole lug?
Blackburn AL 500-4 N. In that designation AL is the aluminum body, 500 is the 500 kcmil conductor size, and 4 N is the four-hole NEMA pad drilling.
8) Does the AL 500-4 N come insulated or do I need to cover it?
Bare, with no insulation on the body. Any insulating or covering at the termination, heat shrink, boots or taping, has to be supplied separately per your spec.
9) Is the AL 500-4 N sold individually or in a box?
Sold each. On a three-phase plus neutral termination you would order four, and remember each lug is a single crimp point, so count both ends of the feeder if you are landing at both.
How fast can I get the Blackburn AL 500-4 N 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 AL 500-4 N come with a warranty?
Absolutely. The Blackburn AL 500-4 N 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 AL 500-4 N?
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