Blackburn EXB170A1406 EX-FLEX BRAID TNCU 1700A 2H 406MM

It is a flexible braid shunt connector used to make a current-carrying connection between two rigid bus or equipment terminals that need to move relative to each other, for example switchgear, disconnects, and transformer bus connections. The conductor is a flat, extra-flexible tin-plated copper braid with a formed two-hole pad at each end, rated 1700 amps, and it is built to the IEEE / ANSI C37, 34 standards. Sold individually.

It is a 1700 amp braid connector. Match that against the continuous rating of the bus it lands on: if your bus run is rated above 1700 A you either parallel braids or step up to a higher-rated shunt, because the flexible link becomes the limiting element in the path.

At 1700 amps, two holes are what you want. The EXB170A1406 has a two-hole terminal pad at each end, which stops the braid rotating under fault or thermal cycling and doubles the bolted contact area, keeping joint resistance and heating down. A single-hole lug can pivot under vibration and loosen, which is why NEMA bus drilling on large connections is two-hole. Check that your bus is drilled to the matching centers before ordering.

The conductor is tin-plated copper. Tin plating slows oxidation at the contact surfaces and on the braid strands, which keeps contact resistance stable over time and makes the pads compatible with aluminum bus without the galvanic problems bare copper brings. For outdoor switchgear or humid plant environments that plating is the reason you would specify this over an unplated braid.

Yes. The braid is built to IEEE / ANSI C37, 34, the standards family covering high voltage air switches and their connection hardware, which is what a utility or substation spec normally calls out for a flexible bus shunt.

Flat. The conductor is a flat, extra-flexible braid rather than a round stranded cable, so it flexes readily in one plane and stacks tight in the limited depth behind switchgear panels. Round flexible connectors are the choice where movement happens in more than one direction.

Made in the United States, and it ships as a single piece, one connector per unit, under part number EXB170A1406. For domestic preference or Buy American language on a utility or federal job, the country of origin is on record as US.