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mbates1566 posted:

The reason why I am asking, is that I had a problem on a figure 8 using a 90 degree crossing. Every time the locomotive crossed the 90 degree crossing it would cause a short circuit. the Locomotive would stop, then once the DCC command station reset, it would start up and run again until it reached the 90 degree crossing again. 

 

I have a couple of MTH Real Trax crossings (90° and 45°).  Their factory jumper wire work was less than stellar on both.  I went in and corrected it more to my liking before I used the crossings.  I may not have had a short circuit right away, but I'll bet either one of them wasn't too far away from shorting out had I not fixed them properly.

Might want to check your Lionel crossing jumper wires in the same fashion (I assume Lionel crossings have jumper wires of some sort).

The FasTrack 90 crossing doesn't have wire jumpers, it has all metal plates connecting everything.  If wired correctly for 3 rail you shouldn't get a short.  You have the positive to the center rail and the negative to the outside rails?  Have you tried running the locomotives conventionally?  If it still trips the transformer breakers when run conventionally, I'd say there is something wrong with the locomotives or track itself.

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