Blackburn STB110A1508 FLEX BRAID TNCU 1100A 2H 38.1X508MM

It's a flat, flexible tin-plated copper braid connector used to make a current-carrying connection between two bus bars or equipment pads that need to move, flex, or absorb thermal expansion and vibration. Both ends are two-hole pads, so it bolts to standard NEMA two-hole drilled bus. The braid is built to IEEE/ANSI C37.34, the standard covering high-voltage switch flexible connectors.

The tin plating on this braid slows oxidation at the bolted pads and on the strands themselves, which keeps contact resistance stable in outdoor, humid, or industrial switchgear locations. Bare copper works electrically but oxidizes at the joint over time. Tin plating also makes it compatible with tin-plated or aluminum bus hardware without dissimilar-metal issues at the bare-copper interface.

Use the flexible braid wherever the two ends move relative to each other: transformer to switchgear pads, breaker to bus where thermal growth is real, or anywhere vibration would fatigue a rigid link. A solid copper bus link is fine only when both connection points are mechanically fixed. The STB110A1508 is a flexible, flat-shape conductor made for exactly that moving connection, and its 508 mm length gives you the travel.

No. The braid ships as the connector only, sold each. You supply the bolt-up hardware, typically silicon bronze or stainless bolts with Belleville washers sized to the two-hole pad pattern, torqued to the equipment manufacturer's value for the bus pad.

Country of origin on the STB110A1508 braid is the United States. That matters on federally funded utility and institutional work with domestic sourcing language, so it's worth flagging to your procurement group when you submit the spec.