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  • Member since
    September, 2002
  • 6,758 posts
component preferred location
Posted by ndbprr on Monday, April 30, 2018 4:13 PM

Layout is a dogbone with about 80' of track between the return loops.  Loops will be staging at either end probably three tracks of reach of two tracks.  Layout will be four tracks wide (PRR). all 4 will be wired so trains can cross all four tracks for switching.  end loops will have reversers. so here are the questions:

1. Intend to place NCE DCC base unit app, at the middle of the 80' and run a main bu  for each half of the layout with its own booster (2 total). each half will be divided into 20' blocks with circuit breakers plus the loops making 6 total. do te circuit breakers go at the block they control or near the base unit?.

2, If near the block I assume i am pulling a parallel bus from the main for the block.  should it be seperated by any distance from the main bus other than the connection?

3. Do I need a snubber on the blocks or main bus terminations?

Thank you.

  • Member since
    December, 2004
  • From: Bedford, MA, USA
  • 17,766 posts
Posted by MisterBeasley on Monday, April 30, 2018 4:50 PM

I have two reversing sections, old PS-REV (DCC Specialties) boards that still work fine.  For no reason in particular, I mounted them near the track sections they control.

Later, I sub-divided the layout using the two reversers and a PSX-4 (DCC Specialties)  The PSX-4 is 4 breakers mounted side by side on a single circuit board.  It's easiest to leave the board as one and just run short jumpers to daisy-chain the inputs.  I put that close to my base station.  I left the reversers where they were and ran separate power lines from the base station to them.

Either way, it seems to work fine.  They are attached to the wood cross-pieces of the benchwork, beneath the pink foam sub-roadbed.

Each of these circuits has indicator LEDs which can be made remote.  I should have done that, to bring them out to the front of the benchwork and make them easily visible without bending over to see them under the layout.  It's one of those things you put off when building the layout so you can just get trains running.

It takes an iron man to play with a toy iron horse. 

  • Member since
    December, 2001
  • 1,856 posts
Posted by Stevert on Monday, April 30, 2018 8:34 PM

1) I'd just run a single "booster to end of layout" bus down each leg, then tap off it at the appropriate spots for the breakers.  I'd probably also bump up the gauge of those "main busses" to 12 awg instead of 14 awg.

2) See above.

3) Probably, since you're using NCE.   

  • Member since
    March, 2015
  • 1,203 posts
Posted by SouthPenn on Wednesday, May 02, 2018 8:50 PM

I  don't see the need for two boosters. The NCE Command Station that came with the 5 AMP Power Pro system runs my entire layout, ~200 feet of track.

I would put a booster in the center of the dogbone. The track feed from the booster would go to two breakers. Each breaker would feed one end of the dogbone. Make sure each end of the dogbone is electrically insulated from the other end. The breakers can be mounted anywhere it's convenient. 

Number 12 AWG wire is recommended for the main bus.

The snubbers are installed at the end of a buss run. You would need two, one at each end of the dogbone. 

South Penn

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