Blackburn FB2D12 FLEXIBLE BRAID 153.6KCMIL,12 INLONG

The FB2D12 is a flat, flexible tin-plated copper braid jumper with a two-hole terminal pad at each end. It bonds or grounds between two points that move, vibrate, or shift relative to each other, such as switchgear doors, bus connections, transformer cases, generator frames, and equipment enclosures. The braid construction lets it flex where a solid bar or a rigid cable lug would fatigue and crack.

12 inches overall. That length is what decides whether it spans your two pads with enough slack left to actually flex. Measure hole center to hole center on your existing connection points and confirm the 12 inch braid gives you the loop or bow you need, because a braid pulled taut between two moving parts loses the whole point of using braid.

The FB2D12 braid is rated at 153.6 KCMIL of copper cross section. That figure is what you size against when you are matching a bonding jumper to an equipment grounding conductor requirement or to the bus it is bridging, and it puts the braid in the range of a 2/0 to 3/0 copper conductor by area. Compare the KCMIL figure on the drawing rather than trying to eyeball the braid width.

It carries UL file E3060 and CSA file LR29625. If your specification or inspector calls for a listed bonding jumper on switchgear, motor frames, or service equipment, those two file numbers are the references to cite on the submittal.

The FB2D12 has two-hole terminal pads. Two holes stop the connection from rotating under vibration or a fault, and most utility, switchgear, and substation specs require two-hole pads on grounding and bonding connections for exactly that reason. If your equipment pad is drilled for a single bolt, this braid will not land on it correctly and you want a one-hole braid instead.

The copper braid is tin plated. Tin plating slows oxidation on the strands and on the terminal pads, which matters on a braid because it has enormous surface area compared with a solid conductor and corrosion there raises resistance across the bond. It also makes the pad compatible with aluminum or tinned bus without the galvanic problem a bare copper pad would create.

For a door, hinge, drawout element, or anything that opens and closes, the flat braid is the right choice. It flexes across its width through many thousands of cycles where a stranded cable jumper with crimped lugs work-hardens at the lug barrel and eventually breaks strands. Where the two points never move relative to each other, a plain cable or bar jumper is simpler and cheaper. The FB2D12 gives you 12 inches of flat flexible braid with pads already formed on both ends, so there is no crimping in the field.

Country of origin is the United States. That is the line to reference on federal, transit, or utility work carrying a domestic-content requirement, alongside the UL E3060 and CSA LR29625 listings.

It sells as each, one braid per unit, under part number FB2D12. If you are bonding a run of enclosures or a row of switchgear sections, count one per connection point and order that quantity.