Short answer
Most tripping in Malaysian homes comes from earth leakage in a water heater, rain getting into outdoor sockets or lights, or a faulty appliance. You can usually find the faulty circuit by switching off all MCBs, resetting the RCCB and switching them back on one at a time; a repair with us typically costs RM150 – RM400.
Which switch tripped: RCCB, MCB or main switch?
Open the DB box door (only the outer door, never the cover behind it) and look for the switch that is down. The RCCB, which many people still call the ELCB, is the wider switch with a test button marked 'T'. It trips on earth leakage, meaning current escaping to earth through water, damaged insulation or a person.
MCBs are the narrow switches, one per circuit, and they trip on overload or short circuit. The main switch is usually an isolator that does not trip. If the whole house is dark and nothing in the DB box has moved, check whether your neighbours have power; the problem may be TNB's supply or the fuse at your meter.
| Switch | How to recognise it | Why it trips | What it usually means |
|---|---|---|---|
| RCCB / ELCB | Wide switch with a test button, rated 30mA or 100mA | Earth leakage | Water, a faulty appliance or damaged cable |
| MCB | Narrow switch, one per circuit, rated 6A to 32A | Overload or short circuit | Too many appliances on one circuit, or a short |
| Main switch | Largest switch on the board | Usually does not trip (isolator) | If the house is dark, check TNB supply first |
How do you find the faulty circuit safely?
If the RCCB has tripped, you can usually narrow it down in five minutes. Only touch the breaker switches, with dry hands and dry feet. Never remove the DB box cover or touch any wires or terminals. If you smell burning or see scorch marks on the board, stop there and call an electrician.
If the circuit holds with everything unplugged, plug the appliances back in one by one; the one that trips it is your culprit. If it still trips with nothing plugged in, the fault is in the fixed wiring or a fixed appliance such as the water heater or aircond, and that needs an electrician with test equipment.
- Switch off every MCB (push them all down)
- Push the RCCB back up; if it will not stay up with all MCBs off, stop and call us
- Switch the MCBs on one at a time, waiting a few seconds after each
- When the RCCB trips again, the last MCB you switched on is the faulty circuit
- Leave that MCB off, reset the RCCB and switch the others back on
- Unplug everything on the faulty circuit and try it again
Is it an appliance or water? Causes 1 to 4
In our experience across KL and Selangor, these four causes account for most RCCB trips. Each one lets a small current leak to earth, which is exactly what the RCCB is designed to detect. The RCCB is doing its job, so the fix is to remove the leak, never to bypass or downgrade the RCCB.
- 1. Water heater element: an ageing element leaks current, often tripping only when the shower is on
- 2. Rain in outdoor fittings: porch lights, garden lights and outdoor sockets trip after heavy rain
- 3. Faulty appliances: fridges, kettles, rice cookers and washing machines develop leakage as they age
- 4. Aircond earth leakage: a blocked drain pipe or a failing outdoor unit can trip the RCCB
Is it the wiring or the DB box? Causes 5 to 8
If no appliance is to blame, the problem is in the fixed installation. These faults tend to get worse over time, and some of them, especially damaged cables, are a fire risk. Finding them takes an insulation resistance tester and experience, not a plug-in tester from the hardware shop.
- 5. Old wiring: PVC insulation in 25–30-year-old houses turns brittle and leaks, worse in humid weather
- 6. Overloaded circuits: too many appliances on one MCB, common with extension cords
- 7. Rats in the ceiling: chewed cables in the roof space cause leakage or short circuits
- 8. Faulty RCCB: an old RCCB can trip with no real fault, or worse, fail to trip at all
When should you call an electrician?
Call an electrician if the RCCB will not reset with all MCBs off, if the same circuit trips again after you have unplugged everything, or if tripping comes with a burning smell, buzzing or scorch marks on a socket. Also call if an MCB feels hot, or if anyone has felt a tingle from a tap, appliance or metal fitting.
Do not keep resetting a breaker that trips straight away, and never tape or hold a switch up. If only one circuit is affected, leave that MCB off and book a visit. We offer same-day service every day: book in the morning and it is usually fixed the same day.
How much does it cost to fix tripping in KL?
Every visit has a minimum charge of RM80, which covers travel and inspection. Most tripping jobs cost RM150 – RM400 with us, including finding the fault, and you approve the price before work starts. Across the Klang Valley, tripping repairs are typically quoted at RM100 – RM400.
If the fault turns out to be inside an appliance, we will tell you plainly. It is often cheaper to repair or replace the appliance than to pay for more electrical work. Water heater and aircond faults may need the manufacturer's own service technician, and we can confirm the wiring side is safe first.
| Job | Market range | My Power Care KL |
|---|---|---|
| Inspection visit (minimum charge) | Up to RM150 | RM80 per visit |
| Fault finding and testing (first hour) | RM100 – RM400 | RM150 |
| Power tripping: find and fix | RM100 – RM400 | RM150 – RM400 |
| RCCB / ELCB replacement | RM140 – RM600 | RM250 – RM450 |