letter no. 1
Why does my breaker trip every time it rains or the humidity spikes?
the desk replies — Moisture is getting into an outdoor fitting, balcony socket, external water heater cupboard or garden joint and leaking current to earth, which the RCD correctly detects. It feels random because it follows weather, not usage. An electrician isolates circuits at the DB and tests insulation resistance to find the wet point, then re-terminates it in a properly sealed enclosure.