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Wiring 3-Way Switch For DCC

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  • Member since
    June 2007
  • From: SLO, CA
  • 13 posts
Wiring 3-Way Switch For DCC
Posted by one87th on Saturday, June 9, 2007 2:29 PM
Hey Guys! I'm Looking for some advice from the DCC veterans on any special wiring modifications needed for a Peco insulfrog 3-Way Switch.  I'm ready to lay the track and would like to address this before I do so...Thanks in advance!
Jim Keating SLOMRA President www.slomra.org
  • Member since
    December 2004
  • From: Bedford, MA, USA
  • 21,484 posts
Posted by MisterBeasley on Saturday, June 9, 2007 3:23 PM

I've got two of them on my layout.  They feed yard tracks, so I'm not worried about the power beyond the turnout when the points aren't set for that track.  When I throw the turnouts, I've got good, solid power beyond them.

Insulfrog turnouts should not be a problem.  I would recommend sticking with Peco switch machines, so you maintain the good, solid contact between the point and stock rails.

If you are having problems, you might want to add the Peco gadget that provides contact closures when you throw the turnout.  These can be wired to the appropriate rails, if you need an additional power route.

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

  • Member since
    April 2003
  • From: NB, Canada
  • 127 posts
Posted by babefluff on Saturday, June 9, 2007 7:40 PM

Good day.  I just installed a 3 way Peco Insulfrog on my layout.  It is the start of a three track stub yard.  I ran feeders off my main bus to each of the three yard tracks.  I have no problems and I am using DCC.

Scott

  • Member since
    March 2002
  • 228 posts
Posted by mike33469 on Saturday, June 9, 2007 7:43 PM
I also have a 3 way Peco insulfrog and there was no problem wiring it at all.  I wired it like I wired all the rest of my Peco insulfrog turnouts.
  • Member since
    July 2006
  • From: Colorful Colorado
  • 594 posts
Posted by Gandy Dancer on Sunday, June 10, 2007 1:29 AM
 one87th wrote:
any special wiring modifications needed for a Peco insulfrog 3-Way Switch.
There should be no special wiring modifications needed for an insulfrog switch.  I mean that is the purpose of an insulfrog.  Any problems will be because it is a three way and/or because of the insulfrogs themselves.
  • Member since
    July 2006
  • From: Vail, AZ
  • 1,943 posts
Posted by Vail and Southwestern RR on Monday, June 11, 2007 9:08 AM
 davidmbedard wrote:

I would avoid 3 ways and slip switches when you are doing DCC.  There is no real way of wiring them up reliably.

Or, just not have any engines at all, that would work fine, never a problem!Big Smile [:D]

It's all about avoiding shorts.  You might have to cut some gaps, or add a switch, but there's no reason to avoid them.  Just do the research, draw pictures, and maybe use an ohm meter.  I conpletely disagree about there being no way to wire them up reliably.

Jeff But it's a dry heat!

  • Member since
    July 2006
  • From: Vail, AZ
  • 1,943 posts
Posted by Vail and Southwestern RR on Tuesday, June 12, 2007 3:04 PM

So what you are saying, and I agree with it, is that the polarity of a frog can depend on the position of two points, rather than the usual one.  It still should not be hard to devise a method that gives the right polarity.  I saw one method for wiring a double crossover for DCC which used a auto-reverser to power the messy double frog in the middle (if I'm remembering right).  Not completely simple, but it also doesn't strike me as something to be avoided if it makes the trackplan 'right'.  I'll qualify that a bit by saying that one should have a pretty good understanding of how this stuff works before trying it.  I'm not sure if he's trying to wire the frogs or not, but even if he is it seems to me that the issue is how to wire them, get the polarity right, and avoid shorts.  I'm just saying that there is a defference between no way and no simple way.

I guess it comes down to the usual tradeoffs, power the frogs or not, and simpler trackwork equals simpler wiring.  But most things can be done if necessary to gt what you are after.

Jeff But it's a dry heat!

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