Classic Lionel zw

Yes, BUT, you need to know the power requirements for these accessories.  The 275 watt ZW has an output around 180 watts.  If you are using 14 volts the maximum amps you could support is about 12.5.  Running at max, like this, will cause the ZW to get very hot.  If you use 6-8 amps the ZW should be okay.

Maybe you can. I like to run them at different times so some are running, some aren't. This gives the transformers a little break. With 5 zw's though, power isn't an issue, using only 1 leg of 1 zw to run them all might be. If it is, just spread the load.

One leg of one ZW can handle the full ZW amp output. The output doesn't have to be split up among the throttles, but can be.

Amp draw is what counts, voltage is a sidenote. You can run 10 items if the total amp draw doesnt trip a breaker.

So #A draws 3a set at 12v for a Ferris Wheel, #B draws 4a set at 14v for a tilt a whirl, #C draws 1a at 9v for to streetlamps, and #D draws 0.5a at 4v for 2 ac ready led lamps in a clown car 🤡.... 3a+4a+1a+0.5a = 8.5a on one ZW. So it shouldn't trip a breaker. (I'd expect closer to 10a to be ok if there aren't alot of unaccounted for peak voltages..you have to measure...not hard.)

  When using multiple transformers together you should "phase" them if there is any possibility of a shared connection. (try youtube, "phasing two or more transformers for use together" -by Lionel)

I'd also strongly consider putting a fuse just before each accessory. It should be rated small enough that acceessory's wire can't burn should something go wrong in the accessory. A ZWs breaker protects the transformer... the ZW itself provides plenty of power for meltdowns outside it's case; that's what a fuse is for, wire protection.

And maybe a TVS (dirt cheap ) if electronics are involved.(transient voltage suppressor)

Awesome thanks u guys