Comments on: DCC Wiring – Separate Bus Lines for Turnouts

By: Morgan Bilbo, PRR fan

Morgan Bilbo, PRR fan — Thu, 25 Apr 2019 14:52:55 +0000

Dan: That last question is a dinger. What system? NCE and Digitrax are the two most used. Then there’s “others”. About 8 months ago when I came back into the hobby & DCC, my choice was made by visiting other layouts to see which system they used and why and how. Also depends on size of layout, etc. From what you describe in your original post. The Digitrax Zephyr DCS52 might be a good choice. It provides 3 amps and running 6 locos would be OK. (Assuming all locos are DCC with good decoders, using less than .5 amps per.) The Z can be “boosted” for more power if needed and is a fairly commonly used system. It’s what I use. I’m not familiar with MRC, but I do remember when they brought out decoders a few years ago, they were not good quality. Obviously, this is your choice. And I hope I help some.

By: Dan

Dan — Fri, 19 Apr 2019 10:19:17 +0000

Thanks for the responses. I now realize that the bus line feeds the turnout and I need a separate power source for the DPDT switches. Another question my layout will have approximately 500 ft of track, 30 turnouts. Still a toss up on using MRC or Diigitrax, how many amps do I need from the command station ? . ,

By: David Stokes

David Stokes — Wed, 17 Apr 2019 23:36:22 +0000

Look to Peco, Tortoise and Circitron literature when powering points (switches). They are all different, and it looks confusing, but as in all model building, you are only ever joining two wires at the one time, but many times over. Make sure the first one works before moving on to the next.

By: ROBERT SCHWORM

ROBERT SCHWORM — Wed, 17 Apr 2019 23:24:56 +0000

There are several tutorials on how to build a panel and throw tortoise machines with double pole double throw switches that are “crossed over” to allow for throwing in both directions.

By: Kevin Ching

Kevin Ching — Wed, 17 Apr 2019 21:16:27 +0000

I use NCE system and run the turnouts from the same bus si that when i use the turnout function all I need is the decoders between the bus and turnout then use the accessory and number button to change the turnout all these decoders use the tortoise machines not the twin coil machines

By: David Broad

David Broad — Wed, 17 Apr 2019 19:19:43 +0000

Yes always best to use separate wiring for turnouts. That way a turnout fault / short doesn’t stop the trains as well

By: Morgan F Bilbo

Morgan F Bilbo — Wed, 17 Apr 2019 15:19:16 +0000

Dan. I agree with Bill. You can also power turnout motors with a totally separate line, even regular DC, to power the motors. Not sure about AC. Just depends on the machine. But I do recommend using the same machines on the layout. Don’t mix them. Some do with no trouble. But when one goes bad, it’s nice to know exactly how to replace it. Using simple plug in or such. And a separate power supply. Do not run turnout motors with any loco power. Hope this helps.

By: Bill

Bill — Tue, 16 Apr 2019 04:51:52 +0000

Dan;
When you say “power the turnouts” do you mean throw the turnouts? If so and you want to do this with a separate DCC system then yes you will need a dedicated bus line for this. I am not familiar with MRC’s system but on my digitrax system I run a separate bus by running power from my booster to a number of circuit breakers. One circuit breaker supplies all my power to my tortoise switch machines. If I get a short I can still throw the turnouts (most shorts are due to misaligned turnouts) even if the trains are not moving due to a short on the track (again usually due to a loco entering a turnout that is not aligned to receive it.