Thank you regarding the operating principle of the residual current device.
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The household circuit breaker is 63A, and I know that the leakage current threshold for household use is 30mA. For example, if there’s an appliance in use that is drawing a current of 5A, touching the live wire would result in an electric shock; yet 5A is much higher than 30mA. How then does the breaker trip? . Second question: Does the circuit breaker detect the current between the live wire and the ground wire? It trips when that current reaches 30 mA. So, what happens if the wiring in a home consists only of a live wire and a neutral wire, with no ground wire? Does that mean the leakage protection function is useless?
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