how do i wire a ao smith model dre 52-917 water heater to panel box
have model descrbed above with 3- 4000watt elements. i am putting this into a residental setting. serial #me 98-074 0650-917. i have wired it w/10/3 w/30 amp breaker but get no hot water. the elements are all at bottom of unit and don't know if they all come on at once or staggerd. do i need heavier wire as well as w/40 amp breaker?