Physics for IGCSE & O level - Electricity (Section 2 - No. 49)
Which of the following is a function of an RCD (Residual Current Device)?
To protect against overcurrents.
To protect against short circuits.
To detect and quickly cut off the current if there is a leakage to earth.
To regulate the voltage.
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An RCD detects current leakage to earth and cuts off the supply.