I have a relay that can be powered by 120 Vac, single phase. The 120 Vac power originates from an outlet about 600 feet from where the relay is located. The "hot" line lead of the 120Vac is routed through contacts from other equipment. Once the hot lead arrives at the relay, it is 600 ft away as described above. NOTE: The neutral at the circuit is not routed to the relay.
Another 120 Vac circuit (600 ft away) is routed to the relay. Only the neutral from this circuit (no the hot lead) is routed to the relay.
I know this is a problem but do you know the safety consequences and is identified in the National Electric Code.
SUMMARY of my question:
The line lead of one 120 Vac system is tied to the relay. The neutral lead of a separate 120 Vac system is tied to the same relay. In other words, the line and neutral lead does not come from the same 120 Vac system.