Blackburn EXH140A1700 EX-FLEX BRAID TNCU 1400A 4H 1700MM

It's a flexible braided jumper for high-current switchgear and substation connections, rated 1400A with a 4-hole pad termination. The conductor is flat and flexible rather than rigid bar, so it absorbs vibration, thermal expansion, and slight misalignment between two bolted pads that a solid copper bus would transmit as stress.

The EXH140A1700 terminates in a 4-hole pad, so it mates with equipment bushings and bus pads drilled on a matching 4-hole pattern. It is built to IEEE/ANSI C37.34, the standard for high-voltage switch connectors, so the pad drilling follows that convention. Check the hole pattern and spacing on your bushing pad before ordering; a 2-hole pad needs a 2-hole braid instead.

The conductor is tin-plated copper. The tin plating is what lets you bolt it to aluminum bus or aluminum equipment pads without a bare copper-to-aluminum galvanic couple, and it holds up better in humid or outdoor switchyard environments than bare copper.

Use the braid where the two pads move relative to each other: breaker racking, transformer connections that vibrate, or long runs that grow and shrink with load cycling. Solid bar is the cheaper and stiffer choice when both terminations are fixed and aligned. Because the EXH140A1700 conductor is flat and flexible, it also lets you take up small alignment errors in the field instead of re-drilling a pad.

It is built to IEEE/ANSI C37.34, the standard covering test code for high-voltage air switches and their connectors. That is the reference a utility or institutional spec usually calls out for switchgear jumpers, so it satisfies drawings citing C37.34.

It ships as a single unit, each. Connections between two pads normally need one braid per phase, so a three-phase set is three pieces. It is made in the United States, which matters if your project carries a domestic-content requirement.

Order it as Blackburn EXH140A1700. That number identifies the 1400A extra flexible tin-plated copper braid with the 4-hole termination pad. Adjacent numbers in the EX-FLEX series change the ampacity, hole count, or length, so quote the full designation rather than a shortened form.