Well, hopefully you're smart enough to a) turn the water off before you leave the sink, b) turn the water off when you see the sink about to overflow, because the breaker for the pump tripped and nothing is draining.
No one is watching when the sump fills, and if the breaker is tripped by another device, the pump will just sit t here while t he basement flods.
So you're into doing the least also. You just calculate the least with more foresight!! ;-)
See above.
You have a code cite for that? AFAIK, there is no such exception for a sump pump in a basement. EVERY receptacle has to be on a GFCI. Are you just making stuff up again?
The "sump" is below the drain level, and can overflow before the sink backs up - at least on many laundry pumps I've seen. They have a small "tank" that fills to a particular level before the ejector pump starts. If the pump doesn't start the tank fills to the top - and SOME will leak when this happens - making a mess.
That is why I suggested putting it on the circuit with the light.
Still, he will likely notice that it's not making any noise, and he'll be there to see the water on the floor before it floods the whole basement. Before he leaves he'll turn off the water and only a little more will come out.
That too.
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