SER and SEU cable buyers for service reels
Service-entrance cable is bought in the length the panel needs and a little more, so a service upgrade almost always leaves a coil of SER or SEU on the truck at the end of the day.
- 600 V service cable
- Concentric neutral on SEU
- Aluminium and copper
SEU and SER are the two shapes of service-entrance cable. SEU is the older form: two insulated conductors wrapped around a bare concentric neutral, used for a service drop or a range and dryer circuit. SER is the round version with an insulated neutral and a bare ground among the conductors, and it is what most current residential and light commercial service work uses, because it terminates more easily in a panel.
Both are 600 V cable assemblies listed to UL 854, and both normally use XHHW-2 or THHN/THWN conductors, copper or aluminium, in sizes from 6 AWG up to 4/0 and 250 kcmil. The conductors may be rated 90°C, but the cable has a separate ampacity rule that catches people out: where SE cable is used for interior branch circuits and feeder taps, the ampacity is limited to that of a 60°C conductor.
That single rule shapes the surplus market. A coil of 2/0 aluminium SER bought for a 200-amp service is not worth the same as a coil of 2/0 XHHW to a contractor who understands the derating, and the buyers who understand it are the ones who will pay for the reel. Sellers who skip that step usually end up with a scrap number and a lighter cheque than they expected.
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.
- 2-2-2-4 and 4-4-4-6 aluminium SER
- 1/0 and 2/0 SER for 200-amp services
- SEU with concentric neutral
- Copper SER in short lengths
- Remainders from service upgrade work
What a service reel is worth reviewing for
Size and configuration come first, written the way the trade writes them: 2-2-2-4, 1/0-1/0-1/0-2, 4-4-4-6. That notation tells a buyer the phase conductors, the neutral and the ground in one line, and it is far more useful than a photograph of a label that may or may not be legible.
Metal comes next. Aluminium SER dominates residential service work and copper SER is a smaller, more expensive niche. They are reviewed separately and priced on their own metal. A seller who lists a coil as SER without saying which metal has described half a product.
Coils, not reels, and what that means for condition
Most SER arrives as a coil rather than a reel, because the quantities are small and the cable is stiff enough to hold a shape. A coil opened, pulled through a meter base and re-tied has a memory in it, and the neutral and ground conductors can be kinked where the electrician bent them into the lug. Those kinks are visible at the ends.
Outdoor storage is common and it is not fatal to the conductors, but the outer wrap and the bare ground take the weather. Aluminium SER left on a truck bed for a season will show oxidation at the exposed ends, and the concentric neutral on SEU is the first thing to corrode because it has no jacket over it at all.
Grouping SER and SEU for a clean review
The useful grouping is by configuration and length, not by total weight. Eight coils of 4-4-4-6 at forty feet each is a maintenance-shop lot. Two coils of 4/0 at a hundred and fifty feet is a service lot. Both are legitimate, and they do not belong in the same sentence on a manifest because they do not sell to the same person.
Where a service upgrade has left one long remainder, say sixty feet of 2/0 SER, that is worth a photograph on its own. Short tails under ten feet are cut-off material and should be bundled and described as such. That split takes an hour and it decides whether a lot is reviewed as wire or by weight.
Where this cable turns up in the two states
Residential growth drives this material. The new subdivisions around Myrtle Beach, the Bluffton and Hilton Head corridor, and the northern arc of Raleigh all generate SER through service after service, and the coils that come back are usually aluminium 4-4-4-6 or 2-2-2-4. Panel change-outs in older Charlotte and Columbia neighbourhoods add copper and the occasional SEU coil.
Utility service work contributes too. Co-operatives and municipal systems across the coastal plain and the Piedmont set meters and risers on their own schedules, and the cable ordered for a batch of services is bought in quantity. What is left at the end of a programme is often several full coils of one configuration, which is the easiest kind of service lot to describe and often the easiest to sell.
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.
SER and SEU cable questions
What is the difference between SER and SEU?
SEU carries a bare concentric neutral wrapped around two insulated conductors and was traditionally used for services and for range and dryer circuits. SER is the round construction with separately insulated conductors and a bare ground, and it is what most current service work uses. The print identifies which one a coil is.
Why does a 90°C conductor get 60°C ampacity in SE cable?
Because the installation code applies a limit for SE cable used in interior branch-circuit and feeder-tap applications, regardless of the conductor’s own rating. The conductors may be marked 90°C, but the permitted ampacity is that of a 60°C conductor. It is a common source of confusion on surplus lots and it affects what a contractor will pay.
Do you buy short lengths left over from a service upgrade?
Yes, though short lengths are grouped rather than sold individually. A single coil of fifty or sixty feet is worth listing on its own if the configuration is a common one. Tails under ten feet go into a cut-off group. Either way, write the configuration in trade notation and state the metal, because those two facts decide the buyer.
Is aluminium SER acceptable, or does everyone want copper?
Aluminium is the normal material for residential service-entrance cable in the sizes used for 100, 150 and 200 amp services, and it is bought on that basis. Copper SER exists and is priced on copper. What matters is that the two are never mixed in one description, and that terminations on salvaged lengths are checked.
Send ser and seu cable 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.