On Mon, 29 Jul 2019 10:26:14 -0500 John Hasler <jhasler@newsguy.com> wrote: > They don't have to be on the same branch circuit: just on the same > "phase"[1]. There is probably a gadget available that bridges the > signal between phases. > > > [1] They aren't really phases but everyone calls them that. They are in my country. 3-phase, 240V RMS each phase to neutral, 415V RMS between phases. -- Joe