The most common reason for an RCD or GFCI tripping is moisture entering the circuit wires, a light fixture outside or somewhere else like the main fuse box. Distribution boxes are the unsung heroes of our electrical systems, quietly managing power until something goes wrong. There is also the neutral wire that completes the circuit by carrying the electric. Overload: When the load connected to the circuit exceeds the load capacity of the distribution box and circuit design, it will cause overload tripping. Short circuit: When a direct connection occurs between two conductors in a circuit (usually live and neutral), it causes a short circuit trip. There are only five possible reasons. Switch damage Switch what bad things can happen, trip is more common for no apparent reason.
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