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RCCB / ELCB tripping Singapore — earth-leakage hunt, not a new breaker

The test button is not the fault. When the residual-current device drops, something is leaking to earth: wet water heater, booster or sump pump, outdoor socket, or damaged insulation. AOT hunts the circuit with our EMA-licensed consortium electrician — and the PUB plumber if the leak is water.

Long-tail searches this page is for

• RCCB trips when raining / when washing machine runs / at night
• ELCB trip HDB / condo / water heater
• Main switch trips but MCBs look fine
• Tingling tap or heater — stop using it, WhatsApp immediately

Related: DB box tripping · emergency electrician.