Running 2 trains on one layout

[jimr]

How can I isolate different runs of track so trains are controlled by separate transformer?

[bbmiroku]

The easiest way is to use plastic rail joiners to separate loops, even if they are connected by a spur.  Of course, I assume you are using DC and not DCC?

[James in FL]

Hi jimr,
Have a look here, it's a good read;

https://www.nmra.org/beginner/wiring

Good luck

[jimr]

Thanks a lot!