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Why An RCD Trips
An RCD trips to prevent an unsafe situation, for instance a ‘short’ in an electrical appliance.
An RCD trips when the electrical flow into a circuit is not the same as the electrical flow out of a circuit.
RCDs (Residual Current Devices) are electrical safety switches that remove the supply to an electrical circuit when the circuit is unsafe; if an RCD ‘trips’ it has tripped for a reason, the problem is rarely a faulty RCD.
Many electrical problems are ‘momentary’ – they only exist for a fraction of a second. RCDs, rightly, ‘err on the side of safety’ and will trip when the circuit is momentarily unsafe. Once the ‘moment’ has passed it is possible to ‘reset the RCD’ and restore power to the circuit.
A law of physics states that energy cannot be destroyed.
The amount of electrical current going into an electrical circuit should be the same as the amount of electrical current coming out of an electrical circuit.
If the amount of electrical current going into a circuit is not the same as the amount of electrical current coming out of a circuit something is wrong.
Links
Find & Reset An RCD + Investigate A Constantly Tripping RCD
Links – Domestic Electrics & Central Heating Advice
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