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Marvel wrote: ↑Sun Feb 02, 2020 4:00 pm Yep I took the blue wire out of the wago to isolate 0.

Thanks for the help guys, I’m well happy it’s working just how I want it.

I have not posted here for a while due to work constraints, however it was a pleasure to help you out. But remember you helped us by giving proper details of your set up and what happened when you connected the different wires together.

Its like most things, it's up to who ever wired how they chose to do it. Its they "why" we will never understand.