But the power cuts and calls are intermittent, and no tripping, I really don't know
Whether it is tripping in extreme weather, thunder or lightning, if it is possible that the sensitivity of the leakage switch is higher, resulting in tripping, you can try another one, or you can not change;4, above is only my judgment of this fault train of thought, for reference only
3, circuit breakers, such as with leakage protection, is the water heater to start tripping, or water heater running for some time after tripping;The tripping frequency of the switch is very high (frequent trips), or is it occasionally tripped?;
Best answer1, when the water heater is on, touch with the outside of the breaker. There is no heating. If there is a fever, there may be overload, change a big point of the circuit breaker.2, pay attention to switch off when there is no law can be found, such as there is anti re several times, to see whether the trip, such as trip disconnect the water heater (or unplugged), check whether there is leakage or water heater are instantaneous short-circuit fault.