I have two low voltage wires that run from one side of a building to another. The insulation on both wires is the same color. I eventually just walked an additional wire around the building and checked continuity. Is there an easier way to differentiate between the two wires?
1. At one side of the building mark the two wires. 2. Connect a battery to the two ends noting which is positive. 3. Go to the other side of the building and use your voltmeter to determine which wire end is positive. Mark that one the sameas you did the other end of the positive wire.
Assuming that the two wires are unconnected at both ends. If it was a long way to walk, I'd probably just have connected one wire to earth (or an earth bonded item like a radiator) at the far end and checked for continuity to earth at the local end. A slightly more esoteric way would be to connect a diode between the wires at the remote end. A d.c. continuity check between the two wires at the local end would allow you to deduce which wire was connected to the anode and which to the cathode. A battery between the wires at the far end and a d.c. voltmeter at the local end would do much the same job in that it would tell you which wire was connected to positive! .
i think i get what your saying if for example your running 3 black wires (the insulation is black)and each one is for example a line or hot wire i would take different colored tape and color code each one on each end it eliminates having to ring them out RING =continuity
