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Question about multiple transformers on the layout

I am thinking about the power on the new layout that I am waiting for the track order to come in to start the first phase of that (knowing the way I worked, ordering all the track at once would be kind of a waste.

On the power side, I am going to wire it for conventional block control. I have two transformers, a KW and ZW (postwar both, been reconditioned), and I have some questions about wiring it. It isn't a huge layout, it has two mains where I can have 2 trains running, then there is a siding leading to a pier and some other industrial/yard areas.

I was going to use both transformers  to power some or all of the blocks together (via a 4 way switch) and have a common ground bus that would tie to the common on both transformers, So either the KW would power the yards and the ZW the mains using toggle switches to select, or a 4 way rotary to allow any of the 4 handles to control any block.

Just want to confirm that in this scheme I would need to make sure the transformers are in phase, correct? Eventually I am hoping to convert to command control and won't need the blocks any more, but for now it is good old block wiring and conventional operation.

Last edited by Rich Melvin
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