Substation conductor · Georgia
We buy substation bus wire, tube bus and bus bar
Bus is the least reel-like material in a substation. It arrives as tube, bar, stranded strain conductor and pre-cut jumpers, all referenced to a station drawing, and it is reviewed as a set of fabricated pieces rather than as footage.
- Tube bus and bar
- Strain bus conductor
- Station drawings
01Overview
What this page covers
A substation bus is designed in three forms. Rigid bus is aluminum tube, usually 2 in. through 6 in. IPS schedule 40, supported on post insulators. Strain bus is stranded conductor held under tension between structures, often ACSR or AAAC in a bundle. Jumpers and connections are short flexible lengths that tie the two together.
All three come out of a station rebuild in one movement, and all three are usually released against a demolition or modification drawing. That drawing is the useful document. It lists sizes, lengths and quantities in a way a reel tag never does, and it tells a buyer what the pieces were meant to do.
02Specification
What the station drawing and the piece tell us
- Rigid bus
- Aluminum tube, 2 in. to 6 in. IPS, schedule 40 or schedule 80
- Alloy
- 6063-T6 tube; 6101-T6 bar and channel on older stations
- Strain bus
- ACSR, AAAC or ACSS, single or bundled, 477 kcmil and larger
- Jumpers
- Pre-cut stranded conductor with compression lugs fitted
- Bus bar
- Copper bar, typically 1/4 in. by 2 in. through 1/2 in. by 6 in.
- Standards
- ASTM B241 for aluminum tube, ASTM B187 for copper bar
- Hardware
- Clamps, corona rings, post insulators and expansion fittings
- Condition
- Removed from service, surplus stock, storm-damaged, cut to length
Photograph the end of each tube against a rule. Wall thickness and alloy temper decide the review, and both show at a cut end without any testing.
03Bus and bar we buy
Bus and bar we buy
Rigid aluminum tube bus
Welded or bolted tube runs, with slip joints, expansion fittings and welded taps. Long pieces are worth more as tube than as scrap, so length, straightness and the condition of the welded taps decide whether they are re-usable.
Strain bus and bundle conductor
Tensioned conductor between structures, with dead-end assemblies and spacers. This is the part of a station that behaves like transmission conductor, and it is reviewed on stranding and on damage at the clamps.
Copper bus bar and flexible braid
Flat bar, channel and flexible copper braid from equipment connections. Bar is reviewed on thickness and on whether the plating is intact; braid on condition of the laminations, which crack when it has been flexed too often.
Jumpers, taps and pre-cut leads
Short lengths cut for a specific connection, often with lugs already compressed on. Reviewed by piece count and terminal type rather than by footage, because the labor in a terminated jumper is most of its worth.
04Evaluation
How a station bus lot is reviewed
The drawing comes first, then the physical count. A station modification sheet gives sizes, lengths and quantities, and matching that list against what is standing in the yard is the fastest way to find out whether the lot is complete. Pieces that were cut during demolition lose their drawing reference and are reviewed as scrap tube or scrap bar.
Aluminum tube is judged on straightness, wall thickness and the condition of welded joints. A tube that has been bent, ovalised at a clamp or had a tap torn out is a recovery piece. Copper bar is judged on thickness and plating; silver-plated bar that has been filed or ground to clean a connection is thinner than it reads.
Weight is the final input, because tube and bar are dense compared with conductor. A truckload of 4 in. schedule 40 tube is a heavy load, and it needs a crane and slings rather than a forklift. State the longest piece, because it governs the trailer and the permits.
Tube bus and bar are heavy, rigid and unforgiving. A 20 ft length of 4 in. schedule 40 tube will roll off a trailer bed and will not stop for a boot. Bus in a station that is only partly retired can also be at a different potential from the yard, so nothing is touched until the station ground and the circuit status are confirmed by the owner.
05Seller terms
Before you sell: how it works
Four things a seller should be able to pin down before a truck is booked.
Verification
Footage is checked against the reel tag, the sequential marks on the jacket, the wrap count against the barrel, or a published weight per 1,000 ft — whichever the reel actually supports.
Payment
Payment method and timing are agreed in writing for the specific lot before anything is loaded or moved. No verbal number is treated as an agreement.
Paperwork
A bill of sale for the lot, and for utility material the owning utility’s release reference. Neither is optional and neither is created after the fact.
Freight
Collection is arranged as part of the terms. Say what can lift the reels and whether a 53-foot trailer can reach them, and the pickup is planned around that.
Sending a reel list and photographs costs nothing. A review is not a purchase, and nothing is bought, moved or scheduled until written lot terms are agreed for that material. Request a pickup when the lot is ready.
06Related
Related material
07Questions
Substation bus wire questions
Is rigid tube bus bought by length or by weight?
Both are recorded, but length and wall thickness drive the review. Re-usable tube is worth more as tube; bent or tapped pieces are reviewed on weight.
Do you take bus that was cut during demolition?
Yes, as recovery material. Short cut sections have no drawing reference and are reviewed on alloy and weight, which is a different exercise from a full tube run.
How is copper bus bar reviewed?
On thickness, width, plating and flatness. Bar that has been drilled full of holes or ground back to clean a joint is still copper, but it is no longer bar.
What about the insulators and clamps?
They are a separate lot. Post insulators, clamps and corona rings are reviewed on count and condition, and porcelain that has been in a yard for years needs handling care.
Send the station drawing and a tape measure
Sizes, wall thickness, longest piece and piece count are the four figures that matter. A photograph of a cut end against a rule confirms the rest.