So I'm doing research for my hybrid, Kal-like, HERMS build and I was reading into the use of relays. I understand that by using a rotary switch and a relay, I can completely cut the power to either the whole unit (power switch relay) or the elements themselves (in case the SSR is trying to fire the element when it should be off).
Is there a difference between the big, hulky $30-50 relays like THIS, and a cheaper relay that looks like THIS. And, does anyone know which wires would go where one the second one?
Thanks for everyone's help!!!
Here are some pics of the bulky and cheap below: