Auxiliary power · 600 V to 15 kV station cable
Station service cable buyers in New York
Station service is the station's own supply: the 480 V and 600 V feeders, the 5 kV and 15 kV transformer primaries, and the DC circuits that keep protection alive. It is also the most ordinary cable inside the fence, and the easiest to reuse.
- 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
Auxiliary cable is the most reusable material a substation releases because it is built to ordinary commercial standards. XHHW-2, tray cable and shielded 5 kV or 15 kV cable can be tested, matched to a catalog number and sold to any electrical contractor, not only to a utility. Value turns on footage, jacket condition and test records rather than on station history, which is why a partial reel is still worth reviewing.
What station service actually feeds
A station service transformer takes the station's own high side, commonly 69 kV, 13.8 kV or 4.16 kV, down to 480/277 V or 208/120 V and feeds a switchboard inside or beside the control house. From there the cable runs to motor control centers, distribution panels and individual loads. The biggest loads are usually transformer cooling: forced-oil and forced-air fans and pumps on large power transformers run continuously and are fed from the auxiliary system.
The rest of the list explains why the footage adds up. Battery chargers, HVAC, sump pumps, motor-operated disconnects, older breaker operating mechanisms, station lighting, receptacles for test equipment, and fire protection all draw from the same boards. Add the DC side, where a 125 V battery bank feeds protection, trip circuits, SCADA and annunciation, and the auxiliary cable in a medium station runs to thousands of feet across dozens of circuits.
The constructions and the sizes that turn up
On the AC side, most of it is 600 V XHHW-2 in conduit, 1/0 to 500 kcmil copper for feeders and 12 to 2 AWG for branch circuits. Where cable runs in open tray rather than conduit, it is tray cable, TC-ER, rated 600 V and often sunlight resistant because tray runs outdoors between the control house and the yard. Larger stations use 5 kV or 15 kV shielded cable for the station service transformer primary and for large motors, with EPR or XLPE insulation, a copper tape shield with drain wires, and an overall jacket.
The DC side is its own family. Station battery cable is 600 V rated but sized for voltage drop over long runs at low voltage, so 1/0 and 2/0 are common between the battery and the main DC board. It is usually two-conductor or single-conductor in red and black, and it is often the least degraded cable in the station because it sits in a tray or a conduit indoors and is never moved.
Why auxiliary cable is the most reusable thing in the fence
High-voltage cable is built to a utility specification that changes with the utility. Auxiliary cable is built to catalog standards: UL 44 for XHHW-2, UL 1277 for tray cable, ICEA and AEIC documents for the shielded types. That means a reel of 4/0 XHHW-2 from a substation is the same product an industrial contractor buys for a feeder in a plant, and there is a wide market for it beyond the utility that owned it.
It is also testable in the field with ordinary equipment. Insulation resistance on a 600 V reel takes minutes and tells a buyer most of what matters; shielded 15 kV cable can be taken further with a withstand or very low frequency test if the seller has the records. Compare that with paper-insulated transmission cable, where the value question is a fluid sample and a history, and the reason auxiliary cable sells so readily becomes obvious.
- Full or near-full reels, still banded, with the manufacturer tag
- Jacket intact along the length, no crush marks from a pulling grip
- Cut ends sealed and taped rather than left open in a wet vault
- Test results or a statement that the cable was never energized
- For DC cable: the voltage and the pair count, and whether lugs are still fitted
Where a good reel turns into a bad one
Cutover work is hard on cable. A feeder pulled out of a duct after thirty years comes out with its jacket scuffed at every coupling and its end cut at an angle by a saw. A tray run cut at the panel and again at the first support yields lengths that are useful to nobody. The reels that survive well are the ones from a project over-order or from a store, where the cable never went in.
Safety on the auxiliary side is easy to underestimate because the voltages are low. A 480 V board and a 125 V battery bank both arc with energy, and the battery cannot be switched off while the charger is running. Isolation, lockout and a DC-rated approach belong to the owner's electricians. Our review begins after the circuits are dead, the battery is clear and the cable is released.
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.
| 600 V feeders | XHHW-2 copper, 1/0 to 500 kcmil, in conduit or duct; aluminum on larger feeders |
|---|---|
| Tray cable | TC-ER, 600 V, XLPE or PVC/nylon, sunlight resistant, 14 AWG to 500 kcmil |
| Medium-voltage feeders | 5 kV and 15 kV shielded, 100 percent or 133 percent insulation level, EPR or XLPE, copper tape shield |
| DC control | 600 V rated, 125 V DC nominal systems, 8 AWG to 1/0, red and black or black and white pairs |
| Conductor material | Copper is standard for auxiliary work; aluminum appears on long 480 V runs |
| Temperature rating | 90 C dry, 75 C wet for XHHW-2; shielded cable rated at 90 C conductor |
| Typical lengths | Full 500 ft and 1,000 ft reels on new work; 20 ft to 300 ft cut lengths after a cutover |
| Testing | Insulation resistance for 600 V; 5 kV or 15 kV withstand or VLF for shielded cable |
Constructions
Auxiliary cable we review
Most of what a station releases here is ordinary cable in ordinary sizes, which is exactly why it moves.
New-project surplus
Feeder and branch cable bought for a station addition and not installed. Full reels, manufacturer tags, sometimes with a purchase order and test certificate still attached.
Cutover removals
Cable pulled out of service when the auxiliary system was replaced. Jacket wear and random lengths are normal. Valued on what is clean and long enough to re-pull.
Battery and DC cable
125 V DC cable from a battery replacement or a DC board upgrade. Usually short runs, heavy conductor, and often in better condition than the AC cable beside it.
15 kV station service primary
Shielded cable from the station service transformer primary. Fewer feet than the 600 V work, but the highest value per foot, and entirely dependent on test records.
Tray cable offcuts
TC-ER in 14 to 2 AWG from tray runs. Common, useful, and usually sold by the reel rather than by the piece unless the lengths are long.
Contractor stock
Part reels from a contractor who finished a station job. Mixed, but often tagged, and the best source of odd sizes that a store no longer carries.
New York
Auxiliary cable in the New York market
New York stations use both conventions. Utility practice leans to 480/277 V for station service, while industrial plants and some generating sites use 600 V, and the two produce different cable. A seller who states which one the station used saves a round of questions, because a 600 V tray cable lot and a 480 V conduit lot are not the same buyer.
The condition of the auxiliary cable varies with the station type. Outdoor yards with long duct banks produce cable that has been buried and pulled, often scuffed and often in shorter lengths. Enclosed urban stations produce short tray runs and many part reels, because the distances are small and the cable is cut to fit. Stores produce the cleanest material: full reels, obsolete sizes, and spares for equipment that has since been replaced.
What helps a New York lot move
- Voltage and construction for each reel, from the tag if it survives
- Footage, measured from the reel wrap if the tag is gone
- Whether the cable was in service, or bought and never installed
- Conductor material and size, and strand type on larger sizes
- For shielded cable: insulation level and any test records
Seller questions
Questions sellers ask
Which cables count as station service?
Anything feeding the station's own loads rather than the power system. In practice that means 600 V and 480 V AC distribution, 208/120 V panels, 125 V DC battery circuits, and the 5 kV or 15 kV shielded feeders that supply the station service transformer or large auxiliary motors. The 69 kV and above cable in the yard is transmission or subtransmission, not auxiliary.
Why is station service cable easier to sell than transmission cable?
Because it is built to published commercial standards and can be used outside a substation. A reel of 4/0 XHHW-2 or a length of 15 kV shielded feeder is the same product an industrial contractor installs. Transmission cable is often built to a utility specification, and its value depends on oil or paper condition and on records that rarely survive.
Do you buy cable that was pulled out of conduit?
Yes, with the expectation that it is valued differently. Pulled cable usually has jacket scuffing at couplings and may have been cut at both ends. Clean lengths of a hundred feet or more with sound jackets are reusable; shorter or damaged lengths are priced on copper content.
How is 125 V DC battery cable different from ordinary power cable?
Not much in construction, a great deal in application. It is 600 V rated, usually single-conductor or two-conductor in red and black, and sized for voltage drop rather than ampacity because the runs are long and the voltage is low. Lugs are often crimped and left in place, which affects how it is priced and how it must be cut.
What test records change the value of a 15 kV station feeder?
A recent insulation resistance or withstand test, or a very low frequency test, tells a buyer the insulation is sound without pulling the cable apart. Age, storage history and whether the ends were sealed matter almost as much. Without records, shielded cable is bought as untested material and priced accordingly.
Keep reading
Related pages
- Substation wire and bus buyersThe full station material picture
- Medium-voltage cable buyers5 kV to 35 kV cable in general
- Transformer lead wire buyersHeavy flexible copper at the apparatus
- Grounding grid conductor buyersBare copper and bonding
- Decommissioned substation cable buyersWhen a station is retired whole
- Utility surplus conductor buyersStore and project surplus in general
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