What is meant by earth fault protection?

Earth fault protection is called ground fault protection in the US. It is a device that monitors the separation of the hot and ground wires in your house's electrical system. If it detects that the hot and ground have been connected with too low of resistance--like when you drop an appliance into water--it will disconnect the hot line so you won't get shocked It's not intended to be used this way, but if you want an outlet you can switch on and off and you don't want to pull wire, install a ground fault protected outlet.

If you push the "test" button the outlet will be switched off, and pressing the "reset" button turns it back on.

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