Shielded distribution cable · 5 kV – 35 kV
Medium-voltage cable buyers in New York
The five-to-thirty-five kilovolt band is where most industrial and utility distribution cable sits, and it is the category where sellers most often accept a scrap price for material that was never scrap.
- New York State
- Documented lots
- Reels and cut lengths
- Buyer review
Sell this cable
Send the construction, size and footage. Photographs can follow.
Prefer to talk? 614-715-3047 · saleselectricalbuyers@gmail.com
Medium-voltage cable is priced on voltage class, insulation thickness and shield type before weight is mentioned. A 15 kV 220 mil 1/0 concentric-neutral reel and a 15 kV 175 mil tape-shielded reel of the same size are different products. Footage, jacket condition and sealed ends decide whether it sells as cable or as recovery, and the jacket legend answers most of it without test equipment.
What actually makes a cable medium voltage
Above about 5 kV the cable stops being a conductor with a jacket and becomes a field-control assembly. The build is a concentric stack: stranded conductor, an extruded semiconducting screen over the strands, the insulation, a second semiconducting screen around the outside of the insulation, a metallic shield, and a jacket. The two semicon layers are what separate this product from building wire. Without them, the electric field concentrates in the small air gaps at the strand valleys and at the shield interface, and the insulation fails from the inside after a few years of service.
The insulation is cross-linked polyethylene or ethylene propylene rubber. XLPE is the utility default: higher dielectric strength, higher allowable conductor temperature, and a harder, more dimensionally stable cable that holds its shape on a reel. EPR is more forgiving of flexing and of moisture ingress, which is why it turns up in plant work, on cables that get moved, and in older industrial installations where the specification was written around rubber.
Everything outside the insulation is about the shield. The metallic shield carries charging current, carries fault current for the few cycles before protection operates, and holds the field inside the cable so that the jacket and the air around it are not part of the dielectric. It also has to be grounded, and the way it is grounded decides whether the jacket has to stand off voltage — which is why a jacket that looks cosmetic on a 600 V cable is a safety component here.
133% insulation, and what the class on the jacket means
Insulation level is expressed as a percentage of the basic thickness for the voltage class, and it reflects how the system is grounded and how quickly faults are cleared. A solidly grounded system cleared in a few cycles can use 100% insulation. A system that can run with one phase grounded for hours, or that clears slowly, needs 133% or 173% so the insulation can withstand the elevated voltage stress it will actually see.
Utility distribution in New York is built almost entirely at 133%, so the thickness on the jacket tells you the voltage class in one glance. A 220 mil cable is 15 kV at 133%. The same 15 kV cable at 100% is 175 mil, which is a thinner, cheaper product used in some industrial yards and in shielded cable run in protected trays.
This matters at resale because thickness is not visible in a photograph and rarely printed twice. If the jacket legend is worn, the measured insulation thickness at a cut end, taken with a calliper, resolves the level. It is one of the few checks a seller can do without test equipment, and it changes the answer from a guess to a specification.
| Class | Insulation at 133% | Where it turns up |
|---|---|---|
| 5 kV | 115 mil | Plant distribution, motor feeders, older mill and utility substations |
| 8 kV | 140 mil | Industrial retrofits, generator leads, some substation service |
| 15 kV | 220 mil | The workhorse: 13.2 kV and 13.8 kV feeders, URD, risers, switchgear |
| 25 kV | 320 mil | 23 kV and 27.6 kV distribution, longer feeders, higher fault duty |
| 35 kV | 420 mil | Subtransmission, large plant distribution, renewable collector feeders |
Concentric neutral or tape shield
Two shield constructions account for most of the band. A concentric neutral is a layer of copper wires helically applied over the insulation shield, and it doubles as the neutral conductor. A tape shield is a flat copper tape applied with an overlap, usually with one or two drain wires underneath, and it carries fault current and charging current but is not a neutral.
The neutral can be full, two-thirds or one-third. A one-third neutral carries less current than the phase conductor, on the assumption that the earth and the system grounding take the rest, and it is common on underground residential distribution where the cost of copper in the neutral matters across miles of cable. A full neutral is used where the neutral has to carry the full unbalanced current or where the soil is a poor return path.
For a seller the distinction is concrete: on a concentric-neutral cable the copper neutral is a second copper stream, applied helically around the whole length. On a tape-shielded cable it is a thin ribbon that contributes little to weight and nothing to neutral capacity. Two reels of identical phase conductor can differ by a material quantity that way, and it is written in the jacket legend.
Why this is the highest-value cable most industrial sellers hold
Medium-voltage cable is expensive at the factory because every foot of it is built, screened, cured and tested to a specification. It is also heavy in metal: copper at 4/0 AWG is about two-thirds of a pound per foot of conductor, at 500 kcmil about a pound and a half, and at 750 kcmil more than two pounds. Add the concentric neutral and a large 15 kV cable is carrying well over two pounds of copper per foot before the insulation is counted.
The mistake is to price the reel by total weight. The insulation, both semicon screens and the jacket are most of the diameter and a good part of the mass, and they have no metal value at all. A seller who accepts a per-pound number on a tagged 15 kV reel is comparing a manufactured, tested product against a pile of mixed cable and absorbing the whole difference.
That is not an argument that removed cable is worth more than metal — it is an argument that surplus and new cable should be priced as cable first. Removal itself is the owner's work: nothing is disconnected or cut until the circuit is de-energised, isolated and released by the people who control it. Cable falls back to recovery value when the jacket is sun-cracked, the ends have been open to water for years, the reel has collapsed and crushed the outer layers, or the lengths are too short to terminate. Everything else deserves a footage-based review.
- Reel tag or jacket legend showing voltage, insulation level, size and shield type
- Footage, and whether it is a full factory length or the balance of one
- Ends sealed and capped, with no water visible in the strands at a cut end
- Jacket intact, with no sun cracking, gouges or tracking marks
- For removed cable: the reason it came out, because a feeder taken out for a fault is not the same as one taken out for a rebuild
Specification
What a buyer needs to know about this cable
Every row below changes what a lot is worth. If the reel tag is gone, the jacket print and a cut end usually answer most of it.
Missing detail is not a problem — say what is missing and the review works from photographs.
| Voltage classes | 5 kV, 8 kV, 15 kV, 25 kV and 35 kV; 15 kV dominates industrial and utility distribution |
|---|---|
| Insulation level | 100%, 133% and 173%; 133% is the utility distribution default |
| Insulation thickness | 115 mil at 5 kV, 220 mil at 15 kV, 320 mil at 25 kV, 420 mil at 35 kV — all at 133% |
| Insulation | Cross-linked polyethylene, frequently tree-retardant, or EPR for flexing and wet locations |
| Conductor | 1/0 AWG to 1000 kcmil, class B stranded copper or compact aluminum |
| Shield | Copper tape with drain wires, or concentric copper neutral wires in full, two-thirds or one-third |
| Jacket | PVC or linear low-density polyethylene, sunlight- and track-resistant on URD |
| Standards | AEIC CS8 for XLPE, CS6 for EPR, ICEA S-94-649, UL 1072 |
Constructions
Medium-voltage constructions we review
The voltage class sets the thickness, the shield sets the copper, and the service history sets the condition.
15 kV 220 mil feeder cable
The most common shielded cable in the state. Copper or aluminum, concentric neutral or tape shield, on reels from plant and utility projects.
5 kV and 8 kV plant cable
Older industrial distribution, motor feeders and generator leads. Smaller insulation, often EPR, frequently at the end of a plant's service life.
25 kV and 35 kV cable
Higher classes with 320 mil and 420 mil insulation, used on 23 kV and 27.6 kV systems, long feeders and subtransmission.
Reduced-neutral URD
One-third neutral cable built for subdivision loops. Priced on the phase conductor and the neutral count, not on the reel weight.
EPR constructions
Rubber-insulated cable from plants and older installations. Heavier and more flexible, and worth identifying before it is grouped with XLPE.
Short cut lengths with terminations
Cable cut out of service with stress cones or separable connectors still fitted. The termination is usually worth more than the copper behind it.
New York
Where medium-voltage cable comes from in New York
Distribution voltages around the state include 13.2 kV and 13.8 kV almost everywhere, 23 kV and 27.6 kV on parts of the downstate network, 4 kV remnants in older city and village centers, and 34.5 kV on subtransmission and collector systems. Every one of those voltages produces surplus cable when a feeder is rebuilt, a plant closes, or a service is upgraded.
The industrial stream is larger than most sellers expect. Paper mills, chemical plants, food processing, water and wastewater works, hospitals, universities and large campuses all run their own 5 kV or 15 kV distribution, and all of them hold spare reels in a substation store. When a plant changes hands, that store is usually cleared by someone who has no reason to know what a 220 mil reel is worth.
What helps a New York lot move
- Voltage class and insulation level stated from the jacket, not guessed from the diameter
- Shield type and neutral count, since both change the metal content
- Footage per reel and the total, with part reels identified separately
- Storage: indoors, covered, or standing outdoors in UV
- Whether the cable is surplus to a project or was removed from service, and why
Seller questions
Questions sellers ask
How do I tell 15 kV cable from 25 kV cable?
Measure the insulation thickness at a cut end. At the 133% level, 15 kV cable has 220 mil of insulation and 25 kV cable has 320 mil, which is a visible difference once the semicon screens are accounted for. The jacket legend settles it when it is legible, since it normally prints voltage, insulation level, size and shield type.
What does 133% insulation actually mean?
It means the insulation is 133% of the basic thickness for that voltage class, which allows the cable to withstand higher voltage stress during a ground fault or slow clearing. Utility distribution is normally built at 133%. The same voltage at 100% is thinner and is used where the system is solidly grounded and faults clear quickly.
Is aluminum medium-voltage cable worth buying?
Yes. Aluminum is common in underground residential distribution and on long feeders because it is lighter and less costly, and it is priced on its own metal basis rather than being treated as a poor relation to copper. The construction, footage and condition matter as much as they do for copper.
Why is my 15 kV cable worth more than the scrap yard's per-pound price?
Because most of its weight is insulation, screens and jacket, and none of that has metal value. A per-pound price on the whole reel prices the copper at scrap value and ignores that the cable is a tested, specified product with a footage and a class. Cable is only a metal lot when it is genuinely not reusable.
Do you buy part reels and short lengths?
Yes. Part reels are normal in plant stores, and short lengths are common where cable was cut for a specific run. Each is reviewed on what can be terminated from it: a length too short to make two terminations with slack is a recovery item, while a fifty-foot length with a factory end can still be usable.
Keep reading
Related pages
- URD cable buyersUnderground residential construction in detail
- Padmount cable buyersCable that lands on transformer elbows
- Switchgear cable buyersShort tails and terminations from gear replacements
- PILC cable buyersThe paper and lead construction this replaced
- HPFF pipe-type cable buyersTransmission cable in steel pipe
- Splice kit and accessory buyersTerminations and joints for this cable
City pages
Where this turns up in New York
Next step
Send the lot details
Include the storage city, how it is stored and what can reach it. If you have photographs of reel tags or jacket print, send them with the enquiry.
Send the lot
One desk reviews every lot that arrives.
Prefer to talk? 614-715-3047 · saleselectricalbuyers@gmail.com