RCD continued... So, when the RCD operates and cuts the power off, what then? Don't reach for the phone just yet... An RCD will control a certain number of circuits and one of those has developed a fault, to determine which one, switch off all of the circuit breakers under the control of the RCD in question, or just all circuit breakers if you're unsure what controls what. Then reset the RCD, if it won't latch on, it's time to call an electrician. If it stays latched on, switch on the circuit breakers one at a time until you find the one that operates the RCD again. After you've found the culprit, leave it switched off and restore power to all other circuits. If the faulty circuit is a socket circuit, unplug all appliances from the circuit and try to reset the circuit breaker, if it still won't work, call an electrician. Quite often a faulty appliance is the cause of the problem, and removing it from the circuit is the quick solution, but on occassion it is more complex than that and requires the services of an electrician with test meters to trace the fault and correct it. We do NOT advise dismantling of the circuit, leave it to the professionals. With reference to the photo on the previous page, you will have seen an orange button on the RCD, this is a test button to check the operation of the device and you should test it quarterly and if it won't operate under test, call an electrician.
More to follow...updated 16/01/17
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