Daniel Wigton on Nostr: Luckily, I don't think my house has any such boxes, I once helped my brother-in-law ...

Luckily, I don't think my house has any such boxes, I once helped my brother-in-law replace a bathroom fan. No breaker could cut the power to it. I eventually found a combination of two completely unrelated breakers that could turn it off. I even eventually found the offending box. It was laying loose in the ceiling of the bathroom about 5 ft from the fan. No access panel. I guess at least both circuits were from the same 120v leg. It could have been worse.