High voltage cable above 35 kV: where it goes and why it rarely moves
Cable above 35 kV is transmission plant, and transmission plant has an owner with a standards book, a test record and a reason to keep the reel. Very little of it reaches a secondary buyer.
- 46 kV and above
- Utility owned
- Rarely resold
The classes are 46 kV, 69 kV, 115 kV, 138 kV, 230 kV, 345 kV and 500 kV, and almost all of it belongs to a utility, a generation owner or a large industrial site with its own transmission. It is bought against a specification, installed by a contractor working to that specification, and tested before it is energised. A surplus reel is therefore a document as much as a length of cable.
Constructions split into solid dielectric and fluid filled. Solid dielectric transmission cable looks like a scaled-up medium voltage cable, with conductor and insulation screens, a metallic sheath, sometimes a moisture barrier and a heavy outer jacket. Fluid-filled cable, whether high-pressure pipe type or self-contained, depends on oil under pressure for its dielectric strength, and that changes everything about handling it. The two are handled by different trades and priced by different buyers.
We do not pretend this is our normal business. If a Carolinas utility or a plant with a 69 kV yard has surplus transmission cable, the usual path is back through the manufacturer, into another utility project, or to a specialist who deals in that class. What we can do is tell a seller honestly which of those paths applies, including when the answer is that we are not the right buyer.
What we buy in this family
Condition and documentation decide the basis, not the family alone. These are the forms this material usually arrives in.
- De-energised solid dielectric transmission cable
- 69 kV and 115 kV surplus reels
- Overhead transmission conductor on reels
- Accessories and terminations in a lot
- Cable with test records and tags
- Utility surplus with a disposal record
Solid dielectric and fluid filled are two different problems
Solid dielectric cable can be handled, stored and photographed like any shielded cable, provided the ends are sealed and the sheath is intact. Its value depends on the record: class, conductor size, insulation wall, sheath type, test history and remaining length. Without that record it is an expensive unknown.
Fluid-filled cable is a different matter. Pipe-type cable lives inside a steel pipe with oil circulated under pressure, and self-contained cable holds its oil inside its own sheath. Neither can be cut casually, neither can be stored on a pallet, and both need oil handling and environmental controls. We generally do not take pressurised fluid-filled cable, and saying so early saves everyone a wasted site visit.
Why transmission cable rarely comes to a secondary buyer
Utilities keep records for the life of an asset, and a spare reel is an asset. When a project changes, the cable usually goes back into stores against a future job rather than out to a buyer, because the specification, the test certificate and the warranty travel with it. That is efficient, and it is the main reason the secondary market in this class is thin rather than merely quiet.
Where material does reach the market it tends to be overhead conductor: ACSR, ACAR and AAAC in transmission sizes, often on steel or timber reels that have been outside for years. That conductor is a metal and a construction question, priced as such rather than as insulated cable.
What we ask when a seller believes they have transmission cable
First the print, then the class, then the sheath. Photographs of the jacket print, the reel tag and both ends tell us more than a verbal description. If the material sits in a substation yard, we ask who owns it and whether disposal is running through the utility’s own asset process.
If the cable turns out to be 15 kV or 25 kV distribution cable, which is the common outcome, it is welcome and it is reviewed on the medium voltage page. Descriptions drift upward in retelling. A reel described as high voltage is often a 15 kV shielded reel that nobody has read the print on since it came off the truck.
Where this cable turns up in the two states
Transmission in the Carolinas is a utility business. Duke Energy’s system, the co-operative network and the municipal utilities that serve towns across both states own the 115 kV and 230 kV plant, and the 500 kV backbone crossing the Piedmont belongs to the same world. Surplus out of that plant moves inside it, through the manufacturer, or through specialist channels that deal in transmission class material.
The industrial sites holding transmission class material are the large ones: chemical complexes around Charleston, paper and manufacturing loads in the Piedmont, and generating stations. Even there, a 69 kV yard is usually the utility’s asset standing on the customer’s land, and the cable stays with the utility when that yard is rebuilt.
Coverage
North and South Carolina
Every city page carries the local industrial base and access notes. Start from a state hub if you are not sure which one applies.
If the material is in one of these states
High voltage cable above 35 kV questions
Do you buy 69 kV cable?
We will review it, but we are not the usual route for it. Most 69 kV cable that becomes surplus goes back through the manufacturer or into another utility project, because the test record and the specification matter as much as the conductor. If you have a documented reel, send the tag and the print and we will tell you what we think.
Can you take oil-filled pipe type cable?
No, not in normal practice. Pipe-type and self-contained cable hold insulating oil under pressure, which means oil handling, environmental controls and a proper decommissioning process. A utility or a specialist contractor should be removing it. We will say that rather than quoting for something we cannot move safely or lawfully.
How do I tell high voltage cable from medium voltage?
Read the print on the jacket. It gives the voltage class, and 46 kV and above is transmission. The physical clue is insulation wall thickness: transmission cable has a much thicker wall relative to its conductor than 15 kV distribution cable, and it usually carries a metallic sheath with a jacket over that sheath.
Is overhead transmission conductor something you handle?
Yes, as conductor rather than as cable. ACSR and AAC in transmission sizes are reviewed on stranding, conductor diameter, length and the condition of the steel core, and they are priced against the aluminium market. Reels that have stood outside for years need the outer layers inspected before anyone talks seriously about length.
Send high voltage cable above 35 kv details
Construction, footage, condition and pickup city. Photographs can follow once a buyer has replied.
Or email saleselectricalbuyers@gmail.com
- No fee and no obligation to sell.
- Written lot terms before anything moves.
- Pickup scheduled around your access rules.