Lighting contactor

[hillbilly1]

That makes absolutely no sense of course there’s gonna be faults on the load side if the contactor is stuck in a closed position regardless if the control wire is landed or not, what do you mean by a wrong tap from a different phase from the load side of another contractor it’s completely separated. That makes zero sense.

It means somebody has tapped two other circuits together with those two somewhere on the load side. It will not show up until you turn the power on, and all contactors are closed. Troubleshooting 101.