Blackburn ATC 300 AL TAPERED SPLICE CONCENTRIC 300

The Blackburn ATC 300 is a tapered compression splice for joining two aluminum conductors end to end, sized for 300 concentric conductor. It joins 2 conductors in one crimp and is a bare, uninsulated connector, so the splice body carries no insulation and you insulate over it after crimping.

Yes. The ATC 300 ships bare with no insulation on the barrel, so the completed splice has to be covered, typically with heat shrink or tape appropriate to the circuit voltage. Plan the cover length around a splice body that is 4-5/16 inches long.

It is a crimp connector. The ATC 300 is a compression splice, so it needs a hydraulic or battery crimp tool with the correct die, not a wrench. There are no set screws or bolts to torque. If you want a re-enterable connection you can take apart later, a mechanical bolted splice is the better choice.

Yes, the ATC 300 splice is listed to ANSI C119.4, the standard for connectors used with aluminum and copper conductors. That is the reference specifiers and utility inspectors usually call out on underground and secondary aluminum splices.

The body measures 4-5/16 inches in length, so allow that plus stripped conductor and sleeve overlap on each end when you are figuring clearance in a handhole, pedestal, or pull box.

The tapered profile of the ATC 300 steps the barrel down toward each end so the compression splice transitions smoothly onto the conductor and reduces stress at the crimp edges. It also means orientation matters: seat each conductor fully into its end of the barrel before crimping, and crimp to the die sequence for the barrel, not a single center crimp.

It is sold each, one splice per unit, under manufacturer part number ATC 300. Order one per conductor pair you are joining, and remember a crimp splice is single use.

Country of origin on the ATC 300 aluminum splice is the United States, which matters if you are buying against a Buy American or domestic-content requirement on a public project.