Why Does Your House Fuse Keep Tripping?

Table of Contents

• Introduction

• What Are Fuses and MCBs?

• Signs Your Fuse Keeps Tripping

• Main Causes of Fuse Tripping

• How to Identify the Problem

• What to Do When the Fuse Trips

• Tips to Prevent Frequent Fuse Tripping

• Did You Know?

• Conclusion

• FAQs

• Contact an Electrician

Introduction

A tripping fuse isn’t just an inconvenience — it could be a hidden danger.

Many homeowners think that a fuse or MCB (Miniature Circuit Breaker) that trips often is just a minor annoyance. In fact, it can signal serious problems in your wiring system or electrical appliances.

What Are Fuses and MCBs?

Primary function: safety

Fuses and MCBs are designed to protect your home’s electrical system from damage due to:

• Short circuits

• Overcurrent

• Electrical leakage (for ELCBs)

When a fuse trips, it automatically cuts off the electricity supply to prevent hazards like fire or electric shock.

Signs Your Fuse Keeps Tripping

• Lights suddenly go out in part of the house

• MCB switch keeps flipping down

• Electrical appliances stop working suddenly

• A small ‘pop’ sound from the DB box

Main Causes of Fuse Tripping

Identify the real reason to solve it effectively

1. Overload

Too many appliances plugges into the outlet. e.g:

• water heater + washing machine at the same time

• Oven + microwave + air fryer

Faulty or old appliances

Damaged devices can cause short circuits:

• Old ceiling fan

• Fridge with electrical leakage

• Cheap extension plug

3. Short circuit

Occurs when live and neutral wires touch — very dangerous!

4. Earth leakage

Usually trips ELCB-type fuses when leakage occurs due to:

• Brittle wires

• Moisture in switches or sockets

5. Old and outdated wiring

• Homes over 20 years old may still use old wiring types without proper grounding systems.

How to Identify the Problem

• Check appliances: Unplug them one by one and reset the MCB

• Change socket or plug point: Try a different outlet to test

• Monitor when it trips: Does it happen when using specific appliances?

• Refer to past electrical reports: If wiring was previously inspected

What to Do When the Fuse Trips

1. Turn off all switches and unplug devices

2. Reset the fuse or MCB

3. Plug in devices one at a time to identify the cause

4. If it still trips with no appliances plugged in — call an electrician immediately

Tips to Prevent Frequent Fuse Tripping

• Avoid using too many devices on one socket

• Use quality, SIRIM-certified electrical appliances

• Have your wiring inspected every 5–10 years

• Install an ELCB for extra protection

• Keep your DB box clean from dust and moisture

Did You Know?

• ELCBs can save lives during current leakage

• Repeated fuse tripping can damage sensitive equipment like computers and TVs

• TNB recommends checking household wiring every 10 years

Conclusion

A frequently tripping fuse isn’t just annoying — it could be a sign of serious wiring, overload, or appliance issues. Identifying the cause and acting quickly can prevent fire or electrical shock. Don’t take it lightly — consult a professional if needed.

FAQs

1. Is it normal for a fuse to trip occasionally?

Yes, if it’s due to temporary overload. But if it happens often, get your system checked.

2. How much does an electrical inspection cost?

Around RM100–RM300 depending on house size and inspection scope.

3. What’s the difference between MCB and ELCB?

MCBs protect against overcurrent and short circuits, while ELCBs protect against earth leakage.

4. Can I replace the MCB myself?

Not recommended. It should be done by a certified electrician to avoid risks.

5. When should I get my wiring inspected?

Every 5–10 years or if your house is over 20 years old without any upgrades.

Contact an Electrician

⚡ Not sure why your fuse keeps tripping? Get professional help today!

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