Blackburn EXJ260A1279127 XFLEX BRAID TNCU 2600A 4H 279X127MM

It's a flexible braided expansion connector for high-current bus work. Tin-plated copper braid, flat conductor shape, four-hole pads at 90 degrees to each other, rated 2600A. The braid absorbs thermal expansion, vibration, and slight misalignment between rigid bus bars or between a bus and a switchgear terminal, so the joint isn't taking mechanical stress.

Right angle. The EXJ260A1279127 is a 90 degree connector, so the two four-hole pads face perpendicular to one another. If your bus run continues in a straight line, this is the wrong geometry and you want an in-line version of the extra-flexible braid instead.

The 127 mm figure is the cable length of the braid itself. The 279 mm is the second dimension called out in the part designation, 279 x 127 mm. Lay the part against your bus centers before drilling anything, because the 90 degree pad orientation means the two connection faces sit on perpendicular planes rather than in line.

Four holes per pad, which is the standard NEMA-style four-hole bus drilling used on high-amperage connections. Match your existing bus bar drilling pattern before ordering; a two-hole pad won't interchange.

IEEE / ANSI C37 and 34 are the standards cited for this extra-flexible braid connector. That's the switchgear and high-voltage apparatus family, which is consistent with where these get installed: substation bus, switchgear cubicles, and generator terminal connections.

That's exactly what it's for. The conductor is flexible flat braid rather than a rigid bar, so it accommodates thermal growth, settling, and vibration between two fixed terminations. Rigid bus bolted directly across that kind of interface transmits the stress into the terminals; the braid decouples it.

The conductor on this 2600A braid is tin-plated copper. Tin plating slows oxidation at the contact faces, which matters on a bolted bus joint where a growing oxide layer raises contact resistance and drives heating. It also makes the braid a safer match to aluminum or plated hardware than bare copper.

Sold each. A three-phase bus transition needs three of them, so order by the count of connections you're making, not by the number of phases in the lineup.

Manufactured in the United States. Useful if you're working a federally funded job or an institutional spec with domestic sourcing language attached.