Comments on: Circuit Polarity and Power Needed To Haul 4 Engines https://blog.model-train-help.com/2023/09/circuit-polarity-and-power-needed-to-haul-4-engines.html?utm_source=rss&utm_medium=rss&utm_campaign=circuit-polarity-and-power-needed-to-haul-4-engines Model railroads and model trains Wed, 18 Oct 2023 17:13:35 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: David Zehr https://blog.model-train-help.com/2023/09/circuit-polarity-and-power-needed-to-haul-4-engines.html#comment-64244 Wed, 18 Oct 2023 17:13:35 +0000 http://blog.model-train-help.com/?p=6748#comment-64244 In reply to ROBERT SCHWORM.

The boxcar is a very good suggestion. I will use that. Thanks,

]]> By: Frank B https://blog.model-train-help.com/2023/09/circuit-polarity-and-power-needed-to-haul-4-engines.html#comment-64102 Wed, 04 Oct 2023 06:35:18 +0000 http://blog.model-train-help.com/?p=6748#comment-64102 I advise reading a basic book on DCC railroad systems before you start planning. This will probably give you the answers to all your questions (as well as the answers to many questions you didn’t yet think of !)

]]> By: Kim Fokken https://blog.model-train-help.com/2023/09/circuit-polarity-and-power-needed-to-haul-4-engines.html#comment-64101 Wed, 04 Oct 2023 05:52:20 +0000 http://blog.model-train-help.com/?p=6748#comment-64101 I forgot to mention that my layout is HO. What I used as what would normally be pos and neg in dcc is actually Rail A and Rail B. My inside rails towards the inner part of layout I have is Rail A and outer rail is Rail B but does not apply to everyone’s layouts. Using the wrong wires will result in the controller letting out a warning of a short. Most controllers have short protection that will just be a warning beeps and disabling the system until the issue is resolved, then the system will enable the circuit. I am wondering if locomotives of different gauges use different voltages, I don’t know that.

]]> By: Kim Fokken https://blog.model-train-help.com/2023/09/circuit-polarity-and-power-needed-to-haul-4-engines.html#comment-64099 Wed, 04 Oct 2023 03:56:28 +0000 http://blog.model-train-help.com/?p=6748#comment-64099 I have 4 x 10 dcc layout. I use a Digitrax dcs52 controller and I have quite a well distributed power for two purposes. Power distribution and jumpers for electro-frog switches and I have 9 switches(5 in front and 4 in back. The track between switches needed jumpers because of required insulating joiners so well distributed power is important.

]]> By: Hervey Howe https://blog.model-train-help.com/2023/09/circuit-polarity-and-power-needed-to-haul-4-engines.html#comment-63925 Tue, 19 Sep 2023 22:20:17 +0000 http://blog.model-train-help.com/?p=6748#comment-63925 David,
The previous 2 answers are good in that they are correct as far as they go. That said DCC is a bit more than a bus wire with droppers. You will have to evaluate your turnouts to ensure they are DCC friendly.
Are any of your loops reversing? If so you will want to deal with that to avoid having to throw switches. Short circuits in DCC are potentially much more costly than in DC, try to make them impossible, so as to avoid damaging decoders.
As for what power you will require, it depends on how you run you layout. If operating mostly by yourself or with one other person you probably only run a maximum of 3 or 4 locos at once and will probably only need a 3amp system. If you are running up to 8 locos at once go to a 5amp system.

]]> By: ROBERT SCHWORM https://blog.model-train-help.com/2023/09/circuit-polarity-and-power-needed-to-haul-4-engines.html#comment-63914 Tue, 19 Sep 2023 09:20:58 +0000 http://blog.model-train-help.com/?p=6748#comment-63914 DCC is a system of a 2-wire bus for track power. Wome people twist these wires loosly along the length. The voltage is a constant alternating voltage roughly 15 volts from your DCC power supply.
I use NCE Power Pro that is rated for 5 amps. Another offering is a 10 amp system, but 5 should be enough.
When wiring my layout, I set a box car onto the track with a note that says RED. then I push the car around the layout and the labels on the car define which rail gets what color of wire.

For a bus of 5 amps, my wire gage is 14AWG. The dropers I use are 18-20 awg.

]]> By: David Stokes https://blog.model-train-help.com/2023/09/circuit-polarity-and-power-needed-to-haul-4-engines.html#comment-63910 Tue, 19 Sep 2023 08:20:26 +0000 http://blog.model-train-help.com/?p=6748#comment-63910 If your current wiring is red to the rear, or even black to the back, which appears to be the DCC mantra then just connecting your DCC System to one loop and jumpers to each of your respective loops would do the job. I am told that a pair of wires following the schematic and connected to the rails with droppers is a very sure way of success. Try the first suggestion and if it doesn’t work then rewire your layout.

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