The apparent short that I recently reported was caused by loose rail joiners creating a high resistance and transformer overload. I replaced most of my Atlas turnouts with PECO because I liked the PECO snap action better than the Atlas and the belief that the PECO Turnouts were less prone to picking the points and derailments. I am now running into picking the points derailments at the plastic frogs with the PECO turnouts. Trade one problem for another? DMK
Ooh , not good. Are you using Code 80? I remember wheel gauge issues with Code 80 that were cured by shimming the gap in the plastic frogs.
Took a peak in the archives, Model Railroader advised the following fix: 'To eliminate this problem we narrowed the flangeways by cementing Evergreen 0.10" x 0.80" styrene strips to the guardrails' In the illustrations it notes they were bonded with CA and trimmed with a chisel blade to give a smooth bevel edge . I can scan the page if required. Good luck!
Of course, the strip goes on the side of the guard rail toward the stock rail just in case it's not clear. And, it's probably not just Peco code 80 switches that might require that fix. Many of the early N scale switches had fairly loose tolerances. Doug
Once more. Peco Code 80 switches were/are made to NEMA (European) standards not NMRA (American) standards. The recommended Peco switch is the Code 55.