On April 27, 2019 at 15:36, Ernie Gilman said...
As with most things, the NEC doesn't say who's going to pay for determining FOR DAMN SURE that those wires aren't being used. That's probably a lot more costly than actually removing the wires.
The same article in the NEC also states that if the cables could POSSIBLY be used in the future they can stay - but each cable has to be labeled, at both ends, stating where the other end of the cable is.
The NEC reason for removing abandoned cables is to reduce the fire load.