Hey NJwirenut,

Wow,.....interesting. That was a capacitive reaction between the two wires? Capacitive and not inductive? The length of wire was like the coils of conductor inside a capacitor and 200' was enough to make 15v across the input terminals of the SSR, right?
Did you know what was going on right away, when you measured the 15vac?

Would using twisted shielded wire prevent stuff like that or not in this application?