Thanks Mark. I'm not sure if breakers die of old age. I know they get weak if they're tripped a lot. The good part is mine are cheap, under $4 each. This one only does the track power, but that's a big load with six 20 Amp power supplies on the 20 Amp circuit. That's a pretty big bounce on start up. If it still pops the breaker after I replace it, I have another trick up my sleeve. I'll put a delay circuit on three of the supplies to stagger the start up, reducing that spike.
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