A single user (light bulbs, television, radio, electric razors, etc.) is connected to these wires via a power outlet. The current exits from one of the holes in the socket (the one connected to the phase), passes through, for example, the light bulb and returns to the second hole in the socket.
Upstream of the system there is a differential switch, commonly known as a life-saving device, a safety device capable of interrupting the electrical flow of energy in an electrical circuit in the event of an earth fault (electrical leakage) or electrocution.
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