Water heaters with RCD

Electrical protection (RCD)

— the RCD built right into the heater is a residual current device.

Such a device is intended primarily to protect people from electric shock — for example, if the insulation is damaged and electricity leaks into the case or water. When a person comes into contact with this electricity, a so-called leakage current occurs, the RCD reacts to it and almost instantly turns off the power to the boiler, preventing electric shock.

Note that such protective devices are standardly installed directly in switchboards; however, the presence of an RCD in the water heater provides an additional safety. Naturally, such equipment is found mainly in electric models.