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This subject has so many aspects. You see it on Youtube in various guises. It's here on OGR Forum but the thread wanders off into detail-land. Can someone nail this down for me before I just start hacking away with my dremel tool?

I am using Gargraves track and Ross switches. I want 12 electrical blocks on this 17x17 foot layout to make electrical troubleshooting easier--I want to be able to find shorts quickly. I am running DCS only (no Legacy or conventional) with TMCC run through DCS.

From Barry's book, I get "go 5 or 6 track sections on either side of center" average 27.5 feet but keep the total under 100 feet (3rd ed. pp 62-63). Gargraves switches have unpowered frogs so the switch is a good place to get a "free" block ending. I am not sure about Ross switches.

But there will be plenty of times where a switch will be part of a block and not the end of one. Can anyone suggest a guideline for how many switches can be included? Or in general how to "design" electrical blocks? I am struggling to ask the question correctly. But I hope you get my gist.

Another example: Suppose I have 3-4 parallel tracks coming around a wide curve with a crossover between 2 of them. Should the block group these tracks together over a certain run length?--so all four tracks are in the same block?  Or is it better to have each track be part of a separate block over a longer length and just include the crossover switches in the appropriate block?

I don't think this is rocket science. There probably is no "right" way. I just don't want to end up removing and redoing my connections. I want the best chance I can get to get it right the first time. Any help is MUCH appreciated.

Don

Last edited by Don Merz 070317
Original Post

Below is a schematic of how I did/do it.   This works with a command control or a straight analog system.   Basically I think a switch should be included with the block on point and and the tracks on the frog end should be be the next block unless they are stub, then include them.

For you 4 parallel tracks, you did not explain their relationship, but if assume they are separate loops, they all separate blocks, but if I assume 4  yard tracks on a curve, probably  the same block.track_blocks

Each change in color is for a different electrical block.     These are examples of situations to show how I handled switches and sidings.

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