Quote:
Originally Posted by Life on the fishing pier
The pictured panel has a lighted water heater switch. Mine works on 120VAC and or 12VDC/propane. There is a breaker on the main panel as well is the outside rocker switch located at the lower left corner of the heater. Both systems work independently of each other and can work simultaneously.
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Correct. Some electric capable water heaters do not have an inside switch, only an outside switch. But for those electric capable water heaters with an inside switch, the inside switch is 12v DC. It may be turned on with the light on, but even then the 120v AC outside switch must also be turned on. Electric/propane water heaters will have both 120v AC breakers and 12v DC fuses.