Blackburn FBS4H235A1-18 FLEX BRAID 4 9/16H 1/2 X 3 X 18 IN

Yes. The braid is built to CEI 60694 and IEEE/ANSI C37.34-1994, the standard covering high-voltage air disconnect switches, so it is specified for substation and switchgear duty rather than general building wiring.

Each end pad is drilled with four holes on a 1/2 inch hole size, 3 inch spacing pattern, with the pad dimension given as 4 9/16 inches. Match those figures against the drilling on your bus pad or switch terminal before you order; a 2-hole or NEMA 4-hole pad with different centers will not line up.

It's a flat, flexible tin-plated copper braid connector with a 4-hole pad at each end, used to carry current across a joint that has to move or flex, such as substation bus connections, switchgear, disconnect switch blades, and expansion joints in rigid bus runs. The braid absorbs thermal expansion, vibration, and minor misalignment that a solid bar connection cannot. Overall length is 18 inches.

That's exactly the trade-off this part addresses. A solid bar link is cheaper and stiffer, but it transmits every bit of thermal growth and vibration into the bolted joint and the switch casting. A flexible flat braid like the FBS4H235A1-18 takes that movement instead, which is why it's specified to IEEE/ANSI C37.34-1994 for air disconnect switch service. Use the solid link only where the two pads are fixed relative to each other and will stay that way.

The conductor is tin-plated copper. Tin plating slows the oxidation that builds resistance at a bolted joint and makes the braid safer to bolt to aluminum bus or aluminum switch pads, where bare copper is more prone to galvanic trouble outdoors.

Yes, country of origin is the United States, which matters if you're buying under a domestic-content or Buy American requirement on a utility or government substation project.

It's sold each, so one 18 inch braid per unit. If you're bridging both poles of a three-phase bus run or doubling braids for ampacity, order the quantity to match.