Blackburn ASC 300 TN Alum Comp Splice 300kcmil 90 Deg

The ASC 300 TN is sized for 300 kcmil conductors, one in each end. It is a two-conductor, in-line compression splice, so it joins a single 300 kcmil run to another 300 kcmil run, not a step-down between two different sizes.

Yes. The ASC 300 TN is an aluminum body that is tin-plated, which is what makes it suitable for aluminum-to-aluminum, copper-to-copper, or aluminum-to-copper 300 kcmil splices. The tin plating is the barrier that keeps the aluminum body from reacting directly against copper.

It ships bare. Insulation material is listed as none, so the splice is an uninsulated metal barrel and you insulate it in the field, typically with heat shrink, a cold shrink sleeve, or tape build-up rated for the circuit voltage.

Yes, the ASC 300 TN is built to ANSI C119.4, the standard covering connectors for use between aluminum and copper conductors. That is the citation to put on a submittal when the drawing calls for a C119.4 compliant compression splice.

Yes. This is a compression connection, not a set-screw or mechanical splice, so it has to be crimped with a hydraulic compression tool and the correct die for the barrel. No crimp tool or dies are included with the splice.

It is a 90 degree C rated splice, which lets it be used with 90 C rated conductor insulation such as THHN/THWN-2 or XHHW-2 where the termination temperature is the limiting factor.

Plan for a 3-1/8 inch barrel length plus the insulation build-up you add over it and the bending radius of 300 kcmil cable on each side. In tight gutters and pull boxes that barrel length, not the conductor, is usually what decides whether the splice lays in cleanly.

A compression splice like the ASC 300 TN gives a permanent, tamper-free joint with no torque to re-check, but it needs a hydraulic crimper and the right die on site. A mechanical set-screw splice installs with a hex key or torque wrench and suits a one-off repair or a crew without a crimper. If you are splicing many joints or want nothing that can loosen over time, go compression.

The manufacturer part number is ASC 300 TN from Blackburn. ASC is the aluminum splice series, 300 is the conductor size in kcmil, and TN denotes the tin plating. If your spec calls for a bare aluminum splice without plating, that is a different suffix in the series.

Sold individually, one splice per unit, so order one per joint plus spares for miscrimps. It is manufactured in the United States, which covers Buy American style requirements on federal and institutional work.