Hi Jack: When two wires are run in close proximity to each other, the live (hot) wire will induce a voltage through the insulation into the other wire. This is why it's called induced voltage. It's only voltage, there's no actual power available, so it's harmless. On very long runs, a wire can store that induced voltage, like a capacitor, and give a very mild shock. Don't worry about it. Cheers, Brian.