01
Test and engineering facilities
Work at the Arnold Engineering Development Complex produces instrumentation cable in quantity: shielded pairs, triads and multiconductor runs with a drain wire and an overall jacket. When a test cell is reconfigured, lengths are cut out and the remainder returns to stores. Some of it is scrapped, and some is simply superseded by a different specification.
Instrumentation is priced on construction rather than on copper alone. Shield type, pair count, gauge and whether the cable is twisted or individually shielded all change what it is worth. A photograph of the print legend answers most of those questions before anyone drives out to look.
02
Tullahoma Utilities Board stores
The municipal utility keeps building wire, control cable and tray cable for distribution work and for the equipment in its own buildings. Utility stores are disciplined: material is issued against a job and returned when the job closes, which leaves part reels with tags still readable and lengths still noted. A municipal store also keeps older material longer than a plant would, because a repair may call for a size that is no longer common.
Distribution work also produces armored and direct-burial material that has been handled outdoors. We check for jacket abrasion and for water taken up at a cut end, since both change the value of an otherwise sound reel. Copper that has oxidized green under a jacket is still copper, but it sells differently.
03
Plateau manufacturing and machine work
Coffee County manufacturers build components for customers further afield, and their shops run CNC equipment, presses and test stands. Tray cable carries power and signal between cabinets, control cable handles interlocks, and MC feeds exposed runs where conduit is impractical. A single shop can hold all three within twenty feet of each other. Shops like that are where a mixed pallet of tray and control cable comes from, and it is worth sorting before it is weighed.
A shop that retools keeps the old cable until someone decides the floor space is needed. That decision is when we get called. Lots like this are usually mixed and partly unidentified, and we sort them on site before quoting so the seller can see how the pile divides.