The club I belong to has two MTH Z-4000's. We were testing the wiring on our modular layout. We have three tracks, all independent but they are wired with a common ground. When I checked the phasing ( I connected the commons, set the voltage to the same reading, 14 v., and checked for a spark) I found the transformers were out of phase (Got a whale of a spark!). Of course the transformers have polarized plugs so I couldn't just reverse one of the plugs. So I took off one of the Z-4000's and replaced it with an MRC AH101. I phased it properly and everything ran fine at our display today.
Question: Has anyone else seen this? I would have thought with polarized plugs they would all be wired the same internally. Any suggestions for an easy fix? Other than cutting off the plug?
Thanks for your help.
Don
