adding a relay to operate a circuit
Hi all, I've been trying to add a heating wire to heat up the water in our hot tub. I've wrapped the heating wire around the plastic pipe and it seems to work. I'm just testing it right now and I know it is a illegal connection. What I want to do is have it come on and off with the pump. I have a dedicated 20A for the pump so I'm thinking that shouldn't be a problem except I can't easily get to the internal wiring for the pump to connect the heating strip. Two different questions.
1. Is there a simple relay or some way that by turning on the pump it will signal the heating strip to come on? Poor analogy but like the mercury switch in a sump pump, When the connection is made at the switch it allows the pump to turn on?
2. If I can, I would like to pump up the voltage to the hot wire to 240V and put in a temperature switch so I can get the hot wire to really crank out the heat. I have a 30A wire I ran some time back for this purpose but I'm not sure how to put all this together so it is legal and can be done relatively cheaply. Any thoughts or suggestions would be appreciated