I have a bunch of single wire cables that start at the same place in my house but end up in different rooms. If the cable lengths consisted of 2 (or more) wires, then I know I could work out which cable run corresponds with which room using a multimeter set up for a 'continuity' test, but I was wondering how I could work out the same thing if each run only has a single wire.
Apologies in advance if this is a really stupid question!