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    RCD/MCB

    Actually I mean, RCD/MCB (RCBO) protects circuit against Earth leakage and over-current at the same time, so why between main switch and RCD/MCB, electricians again use RCD?
  2. T

    RCD/MCB

    Could you please let me know why electricians use RCD and RCD/MCB s at the same time on the switchboard?
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