Blackburn FB2F12 FLEXIBLE BRAID 460.8 KCMIL 12IN

The FB2F12 is a flat, flexible tin-plated copper braid connector with a two-hole terminal at each end, 12 inches long and rated 460.8 KCMIL. It is used as a bonding or grounding jumper where two points have to stay electrically bonded but one of them moves or vibrates, such as across a switchgear door hinge, a transformer or generator pad, expansion joints in busway or rail, and equipment ground bus connections. The braid flexes so the bond survives movement that would work-harden and crack a solid conductor.

Yes. The FB2F12 flexible braid is UL and CSA Listed, which is what an inspector or a spec on a healthcare, government or industrial job will typically want to see for a bonding jumper. It is also made in the United States, which matters where a domestic-content requirement applies to the project.

The FB2F12 is a 12 inch braid. Measure your span between the two landing pads and allow slack: a bonding braid should never be pulled taut, because the whole point is that it absorbs movement. If the pads sit close to 12 inches apart with no give, step to a longer braid in the same family rather than stretching this one.

The FB2F12's conductor is tin-plated copper. The tin plating slows oxidation on the strands and at the terminal faces, which keeps contact resistance stable over time and reduces galvanic trouble when you land the braid on aluminum or plated steel bus and enclosure surfaces. Bare copper in a damp or outdoor enclosure greens over and the joint degrades.

The FB2F12 ships as the braid assembly itself, sold each, with a two-hole terminal pad at each end. Bolts, nuts, flat and Belleville washers are not part of the item, so order hardware to match your bus drilling and add antioxidant compound if you are landing on aluminum.

Two-hole is the right call anywhere the connection can see vibration or torque. The FB2F12 lands with two bolts per end, so the pad cannot rotate and back off, which is why two-hole terminations are standard on switchgear, motors and generator bonding. A single-hole jumper is quicker but only appropriate on a static, low-vibration ground point with a pad drilled for one bolt. Check your existing bus drilling first, because the hole pattern has to match.

Often, yes. The FB2F12 has a flat conductor shape, so it lies tight against a bus bar or door frame and takes up far less depth than a round 460.8 KCMIL cable of equivalent capacity. Flat braid also bends in the plane of the strap easily, which suits hinge and expansion-joint bonding where a round cable would need a wide loop.

The FB2F12 is sold as individual pieces, one braid per unit, so quantity is simply the number of bonding points you are making. Order under the Blackburn part number FB2F12 to keep every jumper in the lineup identical in length and rating.