Main information
Don't self-diagnose it
A protective device tripping repeatedly is a safety signal. The cause can't be worked out remotely: only by checking the installation in person.
Safety first
Don't keep resetting it or try to isolate the cause yourself. Don't touch anything else: call and a professional electrician will come out to check it.
Next step
An electrician checks the installation on site and diagnoses what's causing it. Until then, we don't know for certain what it is.
Frequently asked questions
Why is an intermittent fault harder to diagnose?
Because it may not be present at the time of the check; the pattern of when it happens helps locate it.
Should I note the time and appliances in use each time it trips?
Yes, that's very useful information for identifying the cause faster.
Could it be a fault in the RCD or breaker itself?
Possible if the tripping doesn't match any clear usage pattern; assessed during the check.
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