In my opinion, to operate this antique electric trains safely a few things should be done. All transformers should plugged into a power strip. The power strip should be turned off when any of the transformers are unplugged and any time the supervising adult is out of the room. The power strip should plugged into a GFI outlet. There should be external circuit breakers on each of the variable voltage outputs, maybe 6 to 10 amps, and a single circuit breaker on the common output, maybe 15 amps.
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