Definition of residual current device in English:

residual current device


  • A current-activated circuit-breaker used as a safety device for mains-operated electrical tools and appliances.

    • ‘The purpose of the residual current device is to monitor the residual current and to switch off the circuit quickly if it rises to a preset level.’
    • ‘The regulations require that a residual current device installed at a workplace shall be kept in a safe working condition and tested on a regular basis by a competent person to ensure its continued effective operation.’
    • ‘He said the warning to immediately install the safety switch or residual current device came after the electrocution of a young mother and her child this month.’
    • ‘Fit a residual current device, RCDs can reduce the risk of electrocution by cutting the power supply if an electrical tool malfunctions or a cable is cut.’
    circuit breaker, trip switch
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