Blackburn STB200A1457 STB FLEX BRAID SERIES 457IN LONG

The STB200A1457 braid measures 457 mm of cable length. That length is what sets how far apart your two bolted terminations can sit, so lay it out against the actual gap between pads before you order, allowing for the slack a flexible braid needs to absorb movement.

It is a 2-hole standard flexible braid connector, so each terminal pad is drilled for two bolts rather than one. Two-hole pads resist rotation under fault current and vibration, which is why they are specified on substation and switchgear bus work instead of single-bolt lugs. You supply the bolts, nuts, and washers to match your bus drilling.

Use the braid where the two ends move relative to each other. The STB series conductor is flexible and flat in shape, so it takes up thermal expansion of a bus run, switch blade travel, and vibration without loading the terminal pads. A rigid link or bar is the right choice only where both pads are fixed and aligned; anything that shifts will eventually crack solder joints or loosen bolts on rigid hardware.

Copper. That matters for the joint you are making: copper braid bolted directly to an aluminum bus pad creates a dissimilar-metal connection, so use a bimetallic transition washer or plate and an appropriate joint compound at that interface. Copper to copper or copper to tin-plated pads needs no transition.

Blackburn STB200A1457, in the STB flexible braid series. Order by that full designation: the trailing digits track the length, so an adjacent number in the same series is a different braid length and will not span the same gap.

Sold each, one braid per unit. A two-ended connection takes one braid, so count one per bus joint you are making. It is manufactured in the United States, which covers Buy American language on utility and federal jobs.