Just as an FYI Phasing is important in newer transformers too. Just because the transformer has a polarized plug doesnt mean the phasing doesnt have to be checked. We run the layout with 18 Z4000's for power One of those Z4000's had its internal wiring reversed and the polarized plug put it out of phase with the others The transformer was powering different section of the layout but when a passenger car bridged those two power districts through its pickups there was 40 volts to the track Poof went the engines electronics
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