Why do my fuses keep tripping?

Why do my fuses keep tripping?

Some reasons why an RCD trips

What to do when an RCD trips

  1. When you look at the consumer unit (what many people still call the fuse board), it should be clear through labelling which circuits the RCD protects. There may be one or several circuits.
  2. Before resetting the RCD, switch off the MCB (mini circuit breaker) for each circuit which is protected by the RCD which keeps tripping.
  3. Once you have done that, push the paddle on the RCD up to the ON position.

    DO NOT press the test button whilst doing this. Some people incorrectly think that the test button needs to be pushed in whilst the switch paddle is moved to the ON position, but this will cause the RCD to trip.
  4. In theory, the RCD should remain in the ON position as none of the circuits it is protecting are energised. If it does not remain on, try again, making sure that you are NOT pressing the test button by mistake.
  5. If it still doesn't remain on, the problem will need to be investigated further by an electrician.
  6. Assuming that the RCD has remained ON, then switch each of the circuits which are protected by the RCD on one at a time, waiting a couple of seconds between each one.
  7. If one of the circuits causes the RCD to trip, you can leave that one off and allow the other circuits to stay on and be used. The circuit with the fault will need to be investigated by an electrician.
  8. If all of the circuits can be switched on without causing the RCD to trip, that's good news. But if you then find that switching on a specific appliance causes the RCD to trip again, avoid using that appliance and either seek to replace it or have it repaired.
  9. If nuisance tripping still occurs, call an electrician.

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Why do my fuses keep tripping?
Why do my fuses keep tripping?