Aluminum building wire · AA-8000 alloy
Aluminum wire buyers in New York
Aluminum wire has a reputation problem that belongs to a different alloy. The AA-8000 series conductor sold today is not the 1970s aluminum that loosened at terminals, and telling the two apart is the first job on any aluminum lot.
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Aluminum wire is reviewed on alloy, size, insulation type and termination condition. AA-8000 series conductor, marked as such and clean at the ends, is a usable building product. Older EC-grade aluminum, unmarked conductor, or cable with corroded ends and crushed terminations is valued as aluminum metal, which is a much lower basis than copper.
AA-8000 is the alloy that made aluminum acceptable
Aluminum conductors were widely installed in North American buildings from the 1960s, and a well-documented set of failures followed. The conductor of that era was essentially electrical-conductor-grade aluminum, chosen for conductivity, and it behaved badly at terminations: it crept under pressure, expanded and contracted more than the connector around it, and slowly loosened until the joint overheated.
The industry response was the 8000-series alloy, now specified for aluminum building wire and covered by ASTM B800 for the wire and ASTM B801 for compact stranded conductor. These alloys — 8030 and 8176 are the common ones — are formulated to resist creep and to hold torque at a termination far better than the older metal. They are also compact stranded, which produces a smooth, nearly round conductor that fills a lug properly instead of leaving gaps between strands.
That history is why a reel of aluminum wire cannot be valued on metal alone. AA-8000 conductor, correctly identified and clean, is a legitimate product that a contractor will install. Unmarked aluminum of uncertain alloy is a liability that no responsible installer will put into a feeder, and it is bought as metal.
Terminations and the bimetal problem
Aluminum is not difficult to terminate. It is less forgiving than copper. The connector must be listed for aluminum and marked AL or AL9CU, the conductor must be brushed and coated with an antioxidant compound rated for the purpose, and the lug must be torqued to the manufacturer's value with a torque wrench rather than by feel. Skipping any of those steps produces a joint that works for a while and then does not.
The bimetal problem is separate. When aluminum comes into direct contact with copper in a damp location, the two metals form a galvanic couple and the aluminum corrodes preferentially. That is why aluminum-to-copper connections need a connector listed for the combination, a plated barrier, or a short copper pigtail joined with an appropriate splice. It is also why aluminum service conductors are not simply bolted to a copper bus in a wet location.
For resale, termination damage is the visible evidence. A conductor with crushed strands under a set screw, heat discolouration at the end, or white corrosion product packed into the strands has been overheated or has failed. That damage is local, and the cable can sometimes be cut back, but the remaining length and the number of damaged ends decide whether it is worth doing.
How to identify aluminum on a reel
Start with the print. Aluminum building wire is required to be marked, and the surface legend will name the metal or the alloy — 'ALUMINUM', 'AL', or 'AA-8000' — along with the size, insulation type and voltage rating. On older or imported cable the marking may be sparse, in which case the conductor itself is the evidence.
Aluminum is silver-white when freshly cut and oxidises to a flat gray rather than the green of copper. It is about a third the density of copper, so a reel of 4/0 aluminum is noticeably lighter than the same reel of copper, and a length of it feels wrong to anyone who handles copper regularly. A magnet is no help: neither metal is magnetic. A file or a knife on the cut end shows bright silver metal, and the strands of a compact conductor sit tightly together with almost no visible gaps.
The insulation type matters as much as the metal. XHHW-2 aluminum is the usual feeder and branch-circuit conductor; USE-2 aluminum is the direct-burial and service-entrance product; THHN/THWN-2 aluminum appears in conduit work; and aluminum SER cable is a finished assembly with a bare neutral. Each has a different buyer, and the print is what separates them.
Why aluminum is everywhere in New York
Aluminum is used because it is cheaper per amp of capacity and far lighter per foot, and because utilities and large buildings have specified it for service and feeder work for decades. A 350 kcmil aluminum feeder does the work of a 250 kcmil copper feeder at lower material cost, and the reel can be handled by two people instead of a lift. In tall buildings and long underground runs, that weight difference is a design constraint as much as a cost saving.
New York's stock therefore comes from utility service work, large-building feeders, industrial distribution and the residential SER market. Older buildings being renovated release the 1970s aluminum branch-circuit wiring that gave the metal its reputation; those lots are recovery material and should be described as such. Newer service and feeder installations release AA-8000 conductor, and those are the reels a contractor will actually want.
- Alloy marking — AA-8000, or at least a clear aluminum designation
- Size, insulation type and voltage rating from the print
- Condition of the cut ends: bright, gray oxide, or white corrosion
- Whether terminations were cut off cleanly or left crushed and heat-damaged
- Footage, and whether the reel has been stored dry
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.
| Alloy | AA-8000 series aluminum alloy to ASTM B800, compact stranded to ASTM B801 |
|---|---|
| Size range | 6 AWG through 1,000 kcmil; 2, 1/0, 4/0 and 350 kcmil are the common feeder sizes |
| Insulation | XHHW-2, THHN/THWN-2, RHW-2 or USE-2 depending on the installation |
| Voltage rating | 600 V for building wire; 1,000 V on some feeder and service constructions |
| Stranding | Compact round stranded, which gives a smooth, nearly solid profile at the cut end |
| Terminations | Required to be listed for aluminum, marked AL or AL9CU, with antioxidant compound and specified torque |
| Identification | Surface print naming aluminum or AA-8000; silver-white conductor that oxidises gray rather than green |
| Condition signals | White oxide at cut ends, crushed or overheated terminations, jacket damage, water in the core |
Constructions
Aluminum lots we review
Alloy and termination condition separate reusable feeder conductor from metal.
AA-8000 XHHW-2 feeder
The standard aluminum feeder conductor, 1/0 to 500 kcmil, clean and marked. The most reusable aluminum category when the print is legible.
Aluminum USE-2 service cable
Direct-burial rated conductor used for service entrances and outdoor feeders. The burial rating and the print carry most of the value.
Aluminum SER assembly
Service entrance cable with two insulated conductors and a bare neutral, used in residential and light commercial work. Reviewed as a finished assembly, not as loose wire.
Legacy EC-grade branch wiring
The 1960s and 1970s conductor that caused the termination failures. Not reusable as building wire; reviewed on aluminum content and on how cleanly it can be separated.
Aluminum THHN/THWN-2
Conduit-rated aluminum building wire, usually 6 to 2 AWG. Reviewed on size, print and whether the jacket is intact enough to pull again.
Mixed aluminum and copper
Common in demolition and plant closure lots. The two must be separated before weighing; a mixed lot is valued at the lower metal and loses the copper premium.
New York
Aluminum wire in the New York market
Aluminum flows through New York on the utility and large-building side. Service upgrades, feeder replacements and outdoor distribution all consume it, and contractors buy it in the sizes the job needs rather than keeping a broad stock. That makes the resale market for a specific reel narrow but real, and it makes an accurate alloy and size description the difference between a cable price and a metal price.
The state also carries a large legacy stock. Buildings from the 1960s and 1970s still contain aluminum branch-circuit wiring, and renovation releases it in awkward, undocumented lots. Those are handled honestly as recovery material. The material worth pursuing is the newer AA-8000 conductor released from service and feeder work, ideally still on its original reel with the tag attached.
What helps a New York lot move
- Alloy marked on the jacket or identifiable from the print
- Size, insulation type and voltage rating
- Whether the conductor is compact stranded
- Condition of the ends and any termination damage
- Storage history — aluminum and water are a poor combination
Seller questions
Questions sellers ask
How can I tell AA-8000 from older aluminum wire?
The print is the first evidence: AA-8000 series conductor is marked with the alloy or at least the metal, along with the size and insulation type. Older EC-grade conductor often carries a minimal legend or none at all. Age and provenance help, but the print and the reel tag are what a buyer will rely on.
Is aluminum wire worth less than copper?
Per pound, yes, by a wide margin, because aluminum is a lower-value metal. Per amp of capacity the gap narrows, because aluminum carries roughly the same current as a copper conductor two sizes smaller. That is why aluminum is sold on size and application rather than on weight alone.
Can aluminum feeders be reused after removal?
Sometimes. The conductor has to be undamaged at the ends, the alloy has to be identifiable, and there has to be enough length left after cutting back any damaged termination. Removed aluminum with heat damage or white corrosion in the strands is usually recovery material.
What causes the white powder on aluminum conductors?
Aluminum oxide, formed when the bare metal is exposed to moisture and air. A thin gray film is normal and is removed by brushing before termination. Thick white deposits packed into the strands suggest long-term wet exposure and usually mean the cable has taken on water.
Do you buy aluminum SER and service entrance cable?
Yes. Aluminum SER is reviewed as a finished assembly: conductor sizes, the bare neutral, the jacket condition and the footage. It is a different product from loose aluminum conductor and is valued on its own basis, so describe it as SER rather than as aluminum wire.
Keep reading
Related pages
- Feeder cable buyersMulticonductor power feeders in both metals
- Copper wire buyersThe copper side of the same category
- XHHW wire buyersXHHW and XHHW-2 in aluminum and copper
- THHN / THWN wire buyersConduit-rated building wire
- Medium voltage cable buyers5 kV to 35 kV distribution cable
- Plant liquidation cable buyersMixed plant conductor and feeder stock
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