Although all water heaters now claim to have electricity-proof walls.
Actually, it's just a plug.
In order to prevent electric shock, you must unplug the power supply.
Lack of plug knowledge:
The leakage protection plug is used to detect the "residual current" in the "grounding" loop. Its working principle is to insert two power wires (live wire and zero wire) of the plug into the center hole of a special "zero sequence current transformer" at the same time. When the electrical appliance is in normal use, the current flowing through the live wire and the neutral wire is completely equal, and the secondary coil of the current transformer has no voltage output as soon as there is current in and out. When there is "residual current" in the "ground loop" (including the ground loop), the currents passing through the two power lines of the transformer are unbalanced, and a voltage signal proportional to the current will be generated at the output end of the "current transformer". As long as the voltage signal is large enough, the thyristor on the trigger board will turn from off to on after being amplified by the integrated circuit of the special circuit board, so that the trip coil connected in series in this circuit will be energized, thus disconnecting the main circuit trip device.
applied range
Leakage protection plugs are widely used for leakage protection of electric heating tables, storage water heaters, hair dryers, electric clips, electric scissors, vacuum cleaners, electric tubs, electric water heaters, rice cookers, televisions, refrigerators, microwave ovens, washing machines, dishwashers, disinfection cabinets, water dispensers, computers, power tools, medical devices, instruments and meters.