Originally Posted by cal 39 guy
just replaced hot water
heater with an electric
and it keeps popping breaker on my ac panel.
i think it draws more than the 20 amp breaker in panel.
any ideas on best fix?
I will assume that your boat's AC system is 120 volts and that the water heater that was replaced did not trip the circuit breaker. This leaves these possibilities:
1) You wired the replacement water heater incorrectly.
2) The replacement water heater is defective.
3) The replacement water heater is designed for a 240 volt electrical system
4) The replacement water heater is designed to draw more current
than the previous water heater.
Does the breaker trip immediately after being turned on or does it take a couple minutes or more? If it trips immediately, I suspect you wired it incorrectly. Go back and make sure (read the instructions) that every wire is connected to the proper terminal.
Check the label on the water heater. Make sure it is designed for 120 volts AC and that it draws less than twenty amps. If the heater is inappropriate for your boat, return it and get one that is appropriate for your boat's electrical system
Do not even think about installing a larger capacity circuit breaker unless you replace the wiring with higher capacity wiring. You should probably have a pro do this if this is your choice.
If you suspect a faulty circuit breaker (unlikely if it didn't trip with the previous water heater), find another identical breaker on your electrical
panel and swap the two. Unplug the shorepower cord first and disable any inverter
or genset that might power the circuit.