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I recently bought a Z4000 transformer to replace my two PW ZW's that I was using to power my trains. Both of the ZW's have been properly phased. I plan on using my ZW's to now run the accessories and lights on my layout. My question is, do I need to phase my Z4000 with my ZW's even thought they are serving completely different functions? Thanks!

Andy J.
Member TCA
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From a shock hazard standpoint, phasing the transformers is better.  If there is any connection of the commons, out-of-phase transformers will have a voltage equal to the sum of the individual voltages across the hot-to-hot leads.  If you should accidentally touch an accessory feed and a track feed at the same time, the 36 volts or so may be enough to cause a hazardous shock, especially if your body moisture is high on a warm high-humidity day.

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