We buy electrical wire in Richmond and Rosenberg.

Rail-served industry along the US-90A corridor

A rail spur changes the electrical work at a plant. Car movers, loading racks, conveyor systems and dust collection all run at 480 volts, and the runs between them are long enough to need feeders rather than branch circuits. Cable is bought by the reel, and a reel that is short of its original length is a partial, not a mistake. Distribution is spread across the site, so footage adds up quickly.

Rail loading equipment also uses flexible cable: festoon and reel cable for a moving carriage, heavy SOOW for portable tools, and control cable for the interlocks that stop a load when a gate is open. That material is replaced on wear rather than on failure, so it comes out in lengths that are still serviceable. It is also the easiest cable on site to misidentify, because the jacket printing wears off first.

• 480 volt feeders in 250 to 750 MCM
• Festoon and reeling cable for moving equipment
• Conveyor and dust collector motor feeders
• Interlock and safety control cable
• Heavy SOOW cord for portable equipment

Cable around grain, feed and concrete plants

Grain elevators, feed mills and concrete batch plants share a pattern: a lot of motors, a lot of dust, and cable that has to survive both. Motor lead is often 2 kV or 5 kV, and the installations favour conduit and tray over exposed runs, which means the cable is usually protected and the failures happen at the terminations. A plant that runs a leg hard will replace motor lead long before the conductor is worn out.

Surplus appears when a spare motor arrives with a length of cable cut for it and the motor is never installed, or when a project changes the layout after the cable is on site. Both are common here, where the equipment is old, the drawings are older, and the maintenance crew works from memory. That memory is usually right, and it is not documentation.

Dust and moisture are the two things to photograph at a grain plant. A clean jacket in a dusty building is a better sign than it sounds.

What the Brazos flooding did to Fort Bend yards

Richmond and Rosenberg sit close to the Brazos, and the flood years left a mark on yards across the county. Cable stored at ground level took water, silt worked into the wraps, and reels stood in place for weeks before anyone could get to them. A yard that flooded twice has material from both events, and it is rarely separated. The older reels are usually the ones that were never moved.

The damage is not always obvious from the outside. A wet reel dries at the surface and stays damp at the core. Aluminium conductor corrodes inside the jacket, steel reel bolts rust and the wood flange softens, and a reel that looks fine will not roll. Lift one end before deciding what it is. If the flange flexes, it is a handling problem before it is a cable problem.

• Silt and stain lines on the flange
• Rusted bolts and soft or split wood
• Water staining inside the wrap
• White corrosion at the cut end of aluminium
• A jacket that has lifted from the insulation

Reels that sat through a season outdoors

A reel stored outside in this climate goes through a full cycle every year. Summer heat softens the jacket, the afternoon storms soak the wrap, and the winter is mild enough that nothing ever dries out completely. Two summers is a long time for a paper tag, and three is usually the end of it. The cable underneath may be fine, but nobody can prove it from the label.

None of that makes the cable worthless. It makes it a condition grade rather than a surplus grade, and the review will look at the ends, the outer wrap and the reel itself. If the cable has been under a tarp on a rack, say so, because that is a different history from a reel on bare ground. Both are buyable. They are not the same lot.

Photograph the bottom of the reel as well as the top. That is where the water sits and where the damage usually starts.