Our house is has a drilled well, with with 1/2 HP 230V well pump wired from a fixed pressure switch. We've had a couple of pinhole leaks in the copper piping that would have turned into major basement floods had we not happened to be home at the time. I would like to reduce the impact of any future leaks by using a float switch in the basement sump pit to cut power to the well pump in case the sump pit begins to fill. My understanding is that, once the float switch triggered, this would limit the amount of water that could flood to the amount in the pressurized well storage tank (about 10-15 gallons).
The plan is:
Wire the float switch (http://www.dwyer-inst.com/Product/Level/LevelSwitches/Float/SeriesCFS2) in series before the pressure switch. The float switch is rated 240V and 10(8)A which as I understand it is enough for the well pump -- it seems that 1/2HP 230V draws a maximum of 6A.
Use a clamp to fix the float switch cable to the side of the sump pit (which is already lined with wood so that it floats at a few inches in the sump pit.
Does this make sense? Is there something I am overlooking?