PRS-JP-BRAID
Braided copper bonding jumper
Flexible braid with lugs for frames, doors, and equipment that moves.
Quote by length, circular mil area or ampacity note, and lug hole size at each end.
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Bonding jumpers for data center grounding
Hardware alone does not bond a tray joint, a hinged door, or a pipe. Jumpers do. US data center grounding details call them out across tray splices, equipment frames, and raised-floor pedestals. Length and the lug at each end are the quote.
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How bonding jumpers are used in data center grounding
Bonding jumpers connect things that a rigid bus cannot: a hinged door, a tray splice, an expansion joint, a pipe, a frame that gets pulled for service. Flat copper braid stays flexible. A short tray jumper keeps two ladder sections electrically continuous. A pipe clamp lands a conductor on conduit or steel.
They are the above-grade stitches in a system whose main bars are ground bars and whose buried joints are often exothermic welds. Length and the lug hole at each end are the quote. Fault duty or an approximate circular-mil size belongs in the notes when the spec states it. A jumper that is too short will not reach. One with no slack across an expansion joint will tear.
Tray pathways are where crews notice missing bonds. Quote jumpers with cable tray if the splices are not already detailed. This is materials for a US job. It is not a grounding study, and it does not set the grid resistance the engineer is responsible for.
Braid where the joint moves
Flat copper braid with lugs handles doors, shipping splits, and equipment that gets pulled for service. A stiff conductor works until the door cycles. Quote length, approximate circular-mil size or the fault duty you are designing for, and the hole size on each lug.
Those lugs often land on a ground bar. Include the bar if it is not already on the wall.
Tray splices and pipe
Tray-to-tray jumpers keep a run electrically continuous across splices and expansion joints. Expansion joints need slack, so say if that is the detail. Pipe clamps bond conduit, water pipe, or steel. They are not a substitute for the below-grade connections quoted under exothermic grounding.
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PRS-JP-TRAY
Tray-to-tray bonding jumper
Bond across tray splices and expansion joints so the run stays continuous.
Quote by length and tray material. Expansion joints need slack. Say if that is the case.
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PRS-JP-PIPE
Pipe ground clamp jumper
Clamp-to-lug jumper for bonding conduit, water pipe, or steel.
Quote by pipe size range and conductor size landing on the lug.
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Codes keep a quote attached to the right line in this catalog. They are not a manufacturer part number. If you have a spec, put it in the notes. We price that request, not a shopping cart.
Frequently asked questions
Where are bonding jumpers required in a data hall?
Wherever the spec calls for a flexible bond: tray splices, expansion joints, doors, equipment frames, and some pipe or conduit bonds. They are not a replacement for the main grounding electrode conductor or the room ground bar.
Braid or a stiff conductor?
Braid where the joint moves, including doors and gear that is rolled out. A stiff conductor is fine on a joint that never flexes, until someone cycles that door. If the detail shows braid, quote braid. Do not substitute a scrap of wire and call it the same.
How long should a tray bonding jumper be?
Long enough to reach the two landing points, with slack if the joint expands. Measure the splice or send the tray manufacturer’s bond detail. Expansion joints need more slack than a fixed splice. Guessing a six-inch jumper for every joint is how bonds get left off.
What lug holes should I specify?
The hole size on each end, which may not match. A two-hole lug on a bus and a smaller hole on a tray lug are common. Send both. The lug page is the same hardware family if you are buying loose lugs too.
Is a pipe clamp the grounding electrode?
No. A pipe clamp bonds a pipe or conduit into the system. The electrode, the grid, and the main bonding jumper are separate details. Below-grade welds are quoted under exothermic grounding, not as a clamp.
Do jumpers have a published lead time?
Standard short braids differ from a long, high-circular-mil strap with special lugs. We quote timing with the price. There is no inventory count on this page.