Yesterday I had to wire up a water heater that required two 30amp 240v circuits. This heater is wired to allow the bottom element to stay on when the cold water reaches the top of the tank triggering the top element - both elements on at the same time for a quicker recovery. We ran two 10/2's to two separate cut-offs. Than out of the bottom of the cut-offs two 10/2's to a j-box where we fed the two separate circuits (less one egc) thru flex to the one available KO in the top of the water heater. It looks real neat, but a lot of work to wire up one water heater - two cut offs and all that 10/2!. My questions: Is there a 4 pole cut off box on the market? Our suplier said no such amimal. Why would the mfg not wire the water heater so you could use one 60amp 240v circuit? With 4500w elements you could run one 50amp 240v circuit. I hear the on demand heaters require four 30amp circuits!
