wiring Ross 3-rail switches

An 18 or 16  bus and 22 feeders should be fine. You can use euro style barrier strips for connections. Their use is shown in some of this post.

LINK

Dale H

I think you're talking about the switch machines, not the switches themselves. You can run a single line of 14VAC to the area (terminal block, etc...) and then split it to each switch machine. The buttons need to stay separate, because the button is what completes the clrcuit. There's no issue with using stranded and solid together, but it may create some resistance. For this application though, thats probably not of any concern.