Cable from the Great Southwest industrial district.

On one side of a fence, a plant runs machining centers, a quality room and a test bench, and its cable is mostly control, instrumentation and motor feeder at modest horsepower. On the other, a distribution building runs conveyor, lighting and a large service with very little process wiring at all.

The two lots need different descriptions. A machining lot is read on conductor count, shielding and whether the numbered cores are still legible. A distribution lot is read on footage, gauge and how long the cable has sat in a crib under a bench. Both lists are usable; they are simply read differently.

Aerospace work in this district is machining, tooling and sub-assembly rather than final assembly, and its cable follows that: instrumentation pairs from sensors, shielded control cable between machines and cabinets, VFD cable on spindle and axis drives, and motor feeder to coolant and hydraulic pumps. All of it is small gauge, and all of it is worth keeping apart.

Equipment replacement is the usual trigger. A machine is swapped, a cell is rebuilt, a bench is retired, and the cable that connected it is cut at both ends and left in a pile by the door for whoever deals with it next. Put the connectors in a bag with the cable rather than leaving them on the bench.

• Keep shielded and numbered control cable separate from power conductor.
• Note the pair count on instrumentation cable where the print is readable.
• Say whether VFD cable has its drain and shield intact.
• Photograph the connector or terminal end where one survives.

Much of the district was laid out for cross-docking, with doors on both long sides of a building and a trailer court at each end. That is good news for a collection: there is usually a door on the quiet side, and room to turn a trailer without a shunt driver.

Shared drive aisles are the constraint. Two tenants, one aisle, and a trailer parked in it blocks half the block. Confirm the door, the approach and whether the site wants the truck in and out inside a set window before the material is staged. That conversation takes a minute and saves an hour.

Multi-tenant buildings split a large address into small units, and each unit has its own electrical story. A strip-out in one unit produces a few hundred feet of conduit pull and a coil of MC, which is a real lot but a small one, and it is reviewed as carefully as a large one.

List units separately, with the unit number and what the business did there. When several units in one building are emptying at the same time, that detail lets the lots be reviewed and collected together without guessing at the dock about whose cable is on the pallet.