2020 Sep 06, 09:05 PM
I know this is an old thread but you can just use the 24 volt output of one of your sprinkler relays to run a larger relay. I takes about 13amps at 240vac to run a 5HP motor so a relay rated at 20 amps should do the trick. Like this one.
https://www.amazon.com/Bosch-0332019203-...921&sr=8-8
https://www.amazon.com/Bosch-0332019203-...921&sr=8-8