Demolition cable: what the removal method changes

Why demolition cable is its own category

In a demolition, cable is an obstacle rather than an asset. The crew is paid to get the building down, the electrical contractor is paid to make the building safe, and neither is paid to preserve footage. Cable comes out in whatever way is fastest, and the way it comes out decides what it is afterwards.

Tags rarely survive. A demolition contractor has no reason to keep a reel tag, and reels are often the first thing crushed to get them out of the way. So a demolition lot arrives as coils, bundles and cut lengths with no identification beyond the jacket print, and the print is the only thing standing between the cable and the scrap bin.

Three removal methods, three outcomes

Pulling is the good one. The cable is disconnected, pulled back through the conduit or lifted out of tray, and coiled. It keeps its length and most of its jacket. A pulled run of feeder or tray cable can be reused if the print is legible and the ends are sound, and the footage is whatever the run was.

Cutting to length is the middle case. Cable is cut into liftable sections so it can be carried down stairs or out of a mezzanine, and the sections are still cable but no longer a run. They suit shorter work, and the print along each section has to be read to know what they are.

Shearing and pulling with heavy equipment is the end of the line. Cable dragged out by a machine, cut with a shear, or pulled through a wall that is being knocked down arrives kinked, crushed and full of grit. It is metal, and the only useful thing to do is keep it separate from the good material rather than mixed in with it.

• Coils kept apart from cut bundles
• Ends taped as soon as they are cut, not later
• Jacket print legible somewhere along the length
• Grit and demolition dust brushed off before coiling

What testing can and cannot settle

Visual inspection settles most of it. A jacket crushed flat has damaged the insulation under it, and no test will make that cable reusable. Kinks that hold their shape mean the conductor strands have yielded. Water staining at an end means the strands have been wet, and on a paper or moisture-sensitive construction that is the end of the argument.

Electrical testing adds information on the higher-voltage material. Insulation resistance and a proof test on medium-voltage cable show whether the insulation survived, but they do not show whether the jacket will hold up in service, and they cost money to run. For most demolition lots, the decision is made on inspection, and testing confirms a judgment rather than forming one.

The Ohio demolition pattern

Demolition in Ohio follows the industrial map. The cleared brownfield parcels around Mansfield, where large stamping and appliance plants once stood, produce structural steel and copper in the same pass. Mill sites in the Mahoning Valley come down under environmental controls, which means the cable may be treated as part of a regulated process rather than as salvage.

Timing is set by the demolition schedule, not by the cable. A building that is coming down in March has to have its cable out in February, and the lot is what it is by then. The useful move is early contact with the demolition contractor, before the electrical strip-out is scoped, so that pulling is specified on the runs worth pulling.