Blackburn FB3D12-1 FLEX BRAID 230.4 KCMIL 12IN 1HOLE

It is a flat, flexible tin-plated copper braid jumper, 230.4 kcmil, 12 inches long, with a single bolt hole terminal at each end. Braids like this are used where a rigid conductor will not do: bonding across expansion joints, equipment that vibrates or moves, transformer and switchgear connections, and grounding jumpers between bus and frame. The flat braid flexes without work-hardening the way a solid bar or large solid conductor would.

The braid carries UL E3060 and CSA LR29625 file listings, so it can be specified on jobs where an inspector wants a listed bonding jumper rather than a shop-made one. Those two file numbers are what to cite on a submittal.

One hole per terminal pad, each end. The catalog states the 1-hole configuration but not the bolt diameter, so match the pad to your existing bus or lug bolt pattern before drilling anything. If your bus requires two bolts per pad for the amperage or for anti-rotation, a 1-hole braid is the wrong choice and you want a 2-hole version.

The 12 inch figure is the cable length as published for this braid. When you are laying out a jumper across an expansion joint or between two bus pads, measure your actual hole-to-hole span and allow slack, since a braid pulled taut loses the flexibility it was bought for.

The conductor is tin-plated copper. Tin plating slows oxidation at the terminal faces and is what allows the braid to land on aluminum bus or aluminum equipment pads without the galvanic problem bare copper creates. For outdoor, damp, or industrial atmospheres it also keeps the contact surface cleaner over time.

Not where there is repeated motion. This part is classed as a flexible, flat conductor, and that flat braid construction is what tolerates continuous vibration or thermal movement at an expansion joint. A stranded cable jumper of equivalent kcmil will carry the current but fatigues at the lug where a braid does not. If the connection is static, a cable jumper is fine.

It sells as each, one braid per unit, so order one per connection point. Country of origin is the United States, which matters if you are on a project with domestic content requirements.

Blackburn FB3D12-1. That is the manufacturer part number for the 230.4 kcmil flexible braid, 12 inches, 1-hole. Ordering the adjacent length or the 2-hole version changes the number, so quote FB3D12-1 exactly.