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If you want all elements to operate, "as one", all off or all on, then
what
I have in mine is one relay per element, but all the relays run on one
controller.
Considering each element is 240 6kw so lets see 6000/240=25x4= 100 amps I
do not want to put all the elements on at the same time. Its only a 30 amp
breaker