Blackburn AL 2500-4 N ALUMINUM LUG 4 HOLE

The AL 2500-4 N is sized for 2500 kcmil conductor, and the wire range also covers 2156 to 2167 ACSR. It is a compression barrel, so the conductor is crimped in rather than clamped with a setscrew. That puts it at the top end of transmission and large service work, not general feeder terminations.

A four-hole pad spreads the current and the mechanical load across four bolts, which is what utility and switchgear specs call for on conductor this large. It also means the bus or pad you are landing on has to have a matching four-hole drilling pattern. If your bus is drilled two-hole, a four-hole tongue will not land, and you want a two-hole compression lug in the same conductor size instead.

This is a compression lug, not a mechanical setscrew type, so it has to be crimped. At 2500 kcmil that means a hydraulic compression tool with the correct die for the barrel, typically multiple crimps along the length. Hand tools are not in play at this conductor size. The lug is supplied as a bare connector, sold each, so bolts, hardware, and any insulating or sealing accessories are separate.

Yes. The AL 2500-4 N is built to ANSI C119.4, the standard covering electric connectors for use between aluminum-to-aluminum and aluminum-to-copper bare overhead conductors. That is the line item most utility and large institutional submittals ask for on a compression lug. It is also made in the United States, which covers domestic-content questions on federally funded work.

The AL 2500-4 N is an aluminum-bodied compression lug and its published wire range is 2500 kcmil plus 2156 to 2167 ACSR, both aluminum conductor sizes. The one hard credential on it is compliance with ANSI C119.4, the standard for connectors used on aluminum and copper conductors. For a dual-rated AL9CU marking on a specific conductor mix, work from the conductor size stated here and match it to the barrel range rather than assuming a copper application.

Overall length is 15-3/8 inches. On a 2500 kcmil termination that matters more than people expect: you need that much straight run between the end of the cable and the face of the pad inside the enclosure or manhole, plus room to get a hydraulic compression head around the barrel. Check your gutter depth and bend radius before you commit to this lug.

No. The AL 2500-4 N is a terminal lug with a four-hole bolted pad, so it lands a conductor onto a bus, pad, or breaker stud. For joining two lengths of conductor end to end you want a compression splice or sleeve in the same 2500 kcmil range, not a lug.

Sold each. Order one per termination, and remember a three-phase plus neutral set at 2500 kcmil means four lugs per end, eight for both ends of a run. The exact manufacturer part number to order is AL 2500-4 N from Blackburn.