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xkcd #2848: Breaker box
(imgs.xkcd.com)
Alt text:
Any electrician will warn you to first locate and flip the house's CAUSALITY circuit breaker before touching the CIRCUIT BREAKERS one.
It's a "hot water heater" because it only heats water that is sexy.
Or is the water heater itself super sexy? We may never know
It just occurred to me that I actually do have a hot water heater. Two actually. I put them in under my kitchen sink - one raises the 125F domestic water to 140F (and provides near-instant hot water), and the second takes that 140F water and heats it to 185-190F at a dedicated faucet (for filling stock pots, making large quantities of tea, etc). I think I have as much copper run to push electrons as I have to deliver the water in my kitchen sink.