I plan on running, DCS, TMCC, and conventional engines on two loops of fastrack, none larger than 10 x 12 ft. max., powered by a Z-4000 connected to a TIU's variable 0-22 voltage input with a TMCC base connected to that TIU. (The TIU is a version I that's been updated to version 5.0 software.) The TIU will be powered at aux. power in using an 18 volt 1.5 amp AC/DC adapter. I also hope to add the WIFI WIU module sometime in the future.
I'm aware the DCS Companion book states if you opt to include a fuse between the transformer and TIU that a conservation recommendation is to use a fast blow 10 amp fuse which is exactly what I plan to include using a mini blade type fuse.
My question is, "Would it be worthwhile and add additional protection to also have a fast blow fuse between the TIU's output and the track?" If yes, then what amperage would be recommended?
Finally, I know that besides short circuits, transient voltage spikes can destroy a train's electronics too so how should those be dealt with? Would a surge suppressor provide adequate protection, and if yes, then how many joules? If something better is available, what is it and where can it be purchased ? Please include manufacturer, model or item number and where in the setup I've described it should be installed.
Thank you for your help and recommendations.