138 kV cable · Harris County / Greater Houston
We buy 138 kV cable.
Class 138 kV cable is heavier, slower to make and rarely ordered twice. When a project changes scope, the reel bought for it becomes a storage problem instead.
Class 138 kV cable is a step up in every dimension. Insulation walls are thicker, the shield is heavier, the reels are larger, and the cable itself is far less forgiving of a bad bend radius. It is also bought in smaller quantities and scheduled further ahead than the classes below it. Delivery dates run to months rather than weeks.
That combination explains why surplus at this level comes from a narrow set of situations, and why a seller holding a 138 kV reel usually has a story that matters as much as the cable. Scope changes, deferrals and plant upgrades account for most of it. Whatever the reason, a review starts with the paper that came with the drum.
Heavier insulation and the handling that follows
The insulation wall on a 138 kV cable is measured in tenths of an inch rather than in mils, and both the conductor shield and the insulation shield are thicker. That adds diameter, weight and stiffness. A reel that looks manageable beside a 15 kV drum of the same footage can weigh twice as much.
Minimum bend radius scales with diameter, and it is not a suggestion. Cable bent past its radius at a flange or over a truck bed can develop a shield wrinkle or a void at the insulation interface, and neither defect shows from outside. Handling is part of the condition grade.
Storage follows the same logic. These reels want to stand upright on firm ground with the lagging intact, out of standing water, and with the ends sealed. Two summers on a Houston apron without lagging will show in the oversheath long before it shows in the test results. Water under a drum is the usual killer, and it shows in a photograph.
Where 138 kV surplus actually comes from
Utility projects are the first source. A substation expansion or a new industrial tie purchases cable to a calculated length, and if the route changes the reel bought for it can end up too long or too short. The excess, or the cable it replaced, becomes surplus at the end of the job.
Cancelled and descoped work is the second and usually the cleanest. A project deferred after delivery leaves full reels under lagging, tagged and untouched. That material reviews most easily and is hardest for the owner to keep, which is why it moves. Age counts here more than the tag suggests, because a deferred job can sit for years.
Third is the plant that upgraded. A large industrial user with its own 138 kV supply may replace a run during a turnaround and keep the removed cable, because nobody has decided what to do with it. That cable is used rather than surplus, and it is graded that way.
- Full reels from deferred or cancelled projects
- Part reels left by route changes and field cuts
- Removed cable from plant and utility upgrades
- Cut lengths from terminations and ties
- Joints and terminations where they came with the reel
Documentation carries weight at this class
At 600 volts a missing tag is an inconvenience. At 138 kV it changes the review. The factory test report, the reel tag and the purchase record establish construction, insulation level and shipped length, and at this class a buyer cannot reconstruct those from the jacket print alone. Ask for the paperwork before the drum is described any other way.
Routine test documents matter because the cable is a long-lived asset in a critical position. A reel with full paperwork is a candidate for reuse in a real installation. The identical reel without it is a candidate for metal recovery, which is a much lower outcome for everyone involved. At this voltage the file is part of the asset.
Ask also about the route the cable took. A reel delivered to a site and stored under a tarp for a year is not the same as one pulled into a duct and cut out again. The first is surplus. The second is used cable with a service history, and both are bought.
Offering a full reel and offering a stub
A full reel under lagging is described in a few lines: voltage class, conductor size and material, insulation type, manufacturer, shipped length and year. Add a photograph of the tag and one of the drum, and the review can begin without anybody leaving the office. A stencil on the flange is worth as much as the paper label.
A stub is different. Once a drum has been cut, the remaining length is an estimate, and the estimate needs a basis: a wrap count, a weighing against tare, or a factory counter reading. Say which method was used, because a guess and a measurement are not the same claim.
- Voltage class and insulation type
- Conductor size, material and number of conductors
- Shipped length, and how the remainder was estimated
- Test documentation and reel tag
- Storage conditions and whether lagging is intact
Do not unwrap a lagged reel to inspect it. Cut a window in the lagging instead, and photograph what is underneath.
Questions sellers ask
What separates 138 kV cable from 69 kV cable?
Insulation thickness, shield size and physical weight, mainly. Both are shielded constructions with a metallic layer over the insulation, but 138 kV carries a thicker wall and a larger diameter for the same conductor. Handling limits and test documentation are stricter as a result.
Do you buy 138 kV cable that has been energised?
Yes. Removed cable is bought and graded as used, with attention to the oversheath, the shield and the ends. Cable from a plant or utility upgrade is common. Cable with known faults or moisture in the insulation is not bought on the same terms.
Is a part reel at this voltage worth anything?
It can be. A continuous length long enough for a termination-to-termination run is what a buyer wants. Short pieces are limited to joint practice, and joints at 138 kV are engineered work. State the length and let the answer follow from it.
Can accessories be included with a 138 kV lot?
Yes. Joints, terminations and stress cones that came with the project are worth listing separately rather than leaving in a crate. They are matched to the cable construction, and a buyer reviewing the reel will want to know whether they exist.
Buying desk · Greater Houston
Have this cable on the yard?
Tell us what is on the reel, where it sits and what condition it is in. A buyer reviews the lot, asks for photographs of the tag and the cut end, and comes back with a real answer — not a request to call a call centre.
- Cable type, size and voltage class
- Footage, reel count or weight, and condition
- City, and whether the site has loading equipment