Hi everyone I am new to this thread and had a general question about wiring a layout.  I have all gauges from n to G and I am currently rewiring my layouts using bus wire and feeders now my question is since I have two transformers on each of my layout and would like to keep them all due to collecting. I used to have them wired to the track by themselves and now that I have done the bus wiring with feeders to one of the transformers which worked well but my question is how do you connect the second transformer to use when I want to to the current bus wire with feeders without running another pair of bus and feeders?  Is that at all possible?  I will not use both transformers at once just one or the other at A time. I don't have accessories that are powered on my layouts since I have no room just track and trains so any help would be appreciated.