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What to do when one of your RCDs trip

Updated: Jul 11, 2021

Firstly, an RCD is an electrical safety device that automatically switches off the electrical supply in the event of a fault, they monitor the current flowing through 1 or more circuits and if they detect anything flowing in unintended paths they will switch off.


The usual culprit for an RCD trip is a faulty appliance but there can be many reasons why, here is what you can do to help restore power when it happens.


  1. Unplug all appliances in socket outlets and switch off your kitchen appliances at any switches or spur units.

  2. Try resetting the RCD by switching it back to the ON position, if it stays on and doesn’t immediately trip then press the T button to make sure it is still working and reset once more.

  3. If 2 didn’t work then set all MCBs to the off position and set the RCD to on, if it stays on then turn on each MCB 1 by 1 you should eventually turn one on that trips the RCD, leave it off and call an electrician to resolve the issue.

This should help get your power back on for now, but you should always contact a qualified electrician to test for any faults that may have caused the fault and test the RCD itself.

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