RCD Trip Time Testing

RCD Trip Time Testing

The Residual Current Device (RCD) or safety switch trip time on each power circuit, is tested by plugging the tester into a power point on the circuit and creating a fault.
The tester then records the time in which the RCD takes to “trip out”.  The RCD is required by law to trip out within a heart beat to enable its life saving capabilities.
Inspection, testing and location of RCD circuits can sometimes be frustrating and time consuming, due to inadequate documentation by installers.
It is recommended that this service be complimented by Inspection and testing of 240V power outlet connection to RCD’s if wiring documentation/ diagrams are not provided.

  • RCD’s  do fail.  In our harsh Australian climate, the RCD’s can corrode internally which causes them to get “stuck” or delay the trip time.  If the RCD does not trip when you need them to… there is a fair chance of death by electrocution.
  • Many premises do not have an RCD installed in the switch board.  An RCD is different to a circuit breaker.  An RCD has a “TEST” button, a circuit breaker does not.  Circuit breakers save equipment from burnout, RCD’s save lives!  If you are unsure whether your premises is protected by an RCD, please contact a licensed electrical contractor to have one installed.  Never attempt or allow any electrical work to be done at home or the workplace unless it is by a competent person.
  • The test button on the RCD should be pressed to trip the power in between scheduled inspections to ensure their integrity.  However only do this if you have been shown how to by a licensed electrical contractor or your competent Norsafe representative.