Electricity help please?

[mike31154]

For what you're trying to do, I believe you're going to need a different relay, one with more switching ability on the output side. The one you have only switches one circuit and you'll need more than that. I don't have a diagram handy at the moment but the link Mark provided is a good start and clearly shows the additional contact options of the more complex relay. You want a low voltage supply to run the float switch side of the circuit which in turn allows the relay to switch the 110 VAC circuit to run the pump or whatever you're using to top off your system. The control side of your current relay is low voltage at 3-32 VDC, you need to make sure the output or switched part is rated for 110 or higher VAC.