RCCB Tripping in Singapore – Causes & Fast Fix Guide
Power Keeps Tripping at Home? Here’s What It Means
It usually happens suddenly.
You turn on your washing machine or start cooking with your induction cooktop, then everything goes dark. Your main switch trips again.
If you’re living in an HDB flat, condo, or landed home in Singapore, this is a very common issue, especially during humid weather or in older electrical systems.
But here’s the truth: most homeowners don’t know:
RCCB tripping is NOT about overload, it’s about electrical leakage.
And ignoring it can be dangerous. MM Engineering offers emergency electrical services in Singapore.
What Is RCCB & Why Does It Trip
Your RCCB (Residual Current Circuit Breaker) is a safety device inside your DB box.
Its job:
- Detect leakage current
- Prevent electric shock
- Protect your home from fire risk
It trips when:
- Current leaks to earth (above ~30mA)
- A faulty appliance or wiring is detected
Common Causes of RCCB Tripping Singapore Homes
Faulty Washing Machine or Induction Cooktop
This is the #1 cause we see.
- Internal wiring insulation breaks down
- Leakage flows to the metal body
- RCCB trips instantly
Moisture & Water Seepage (Very Common in SG)
Common in older appliances or imported units
Singapore’s humidity + rain = hidden danger.
- Water enters the socket or the wall
- Causes leakage current
- Trips RCCB randomly
High-risk areas:
- Service yard
- Kitchen sockets
- Outdoor points
Multiple Appliances on Same Circuit
Even if each appliance is okay:
Small leakages add up → RCCB trips
Aging or Damaged Electrical Wiring
Very common in:
- Older HDB flats
- Poor renovation work
Faulty RCCB (Main Switch Issue)
- RCCB becomes too sensitive
- Trips without real fault
Needs testing or replacement
Step-by-Step: How to Identify the Problem
Step 1: Isolate the Appliance
- Turn OFF everything
- Reset RCCB
- Switch ON appliances one by one
If it trips → you found the faulty device
Step 2: Try Another Power Socket
- Move the appliance to a different socket
Still trips = appliance problem
No trip = wiring/socket issue
Step 3: Check for Water or Dampness
Look for:
- Wet socket
- Rust
- Damp smell
Step 4: Test Circuit from DB Box
- Turn OFF all MCBs
- Switch ON one circuit at a time
Helps locate faulty wiring zone
When You MUST Call a Licensed Electrician
RCCB trips daily,
Burning smell from the socket,
Water near electrical points,
Old house wiring (10+ years)
Professional Diagnosis by MM Engineering Works
At MM Engineering Works Pte Ltd, we specialize in fast electrical troubleshooting across Singapore.
What We Do:
✔ RCCB testing & replacement
✔ Leakage current testing (Megger test)
✔ Faulty wiring repair
✔ Appliance circuit isolation
✔ Emergency same-day electrician
Why Homeowners Choose Us
10+ years of Singapore experience
Fast response (same-day available)
Licensed & safety-compliant work
Trusted by landed, HDB & condo owners
Estimated Repair Cost in Singapore
| Service | Price Range |
|---|
| RCCB Replacement | $120 – $250 |
| Troubleshooting Visit | $80 – $150 |
| Wiring Repair | $150 – $400 |
| Socket Replacement | $60 – $120 |
Need Urgent Help? Fix Your Power Trip Today
Don’t ignore electrical tripping; it can lead to serious hazards.
Call or WhatsApp now for a fast diagnosis
Same-day electrician available across Singapore
FAQs of RCCB Tripping Singapore
Why does my RCCB trip when I use the washing machine?
Because the washing machine likely has internal leakage. This is common in humid Singapore environments where insulation breaks down over time.
Can an induction cooktop cause an RCCB to trip?
Yes. Faulty internal circuits or moisture can cause leakage, triggering the RCCB.
Is RCCB tripping dangerous?
Yes. It indicates electrical leakage, which can lead to electric shock or fire if ignored.
How do I know if RCCB is faulty?
If it trips even when no appliances are running, the RCCB itself may be defective and needs testing or replacement.
Can I fix the RCCB tripping at my home?
Basic checks can be done, but a proper diagnosis requires a licensed electrician using testing tools such as insulation testers.
Why does Power Trip randomly trip at night?
This is usually caused by moisture buildup or hidden wiring leaks, which are common in Singapore’s humid climate.
How much does it cost to fix power tripping in Singapore?
Costs range from $80 to $400, depending on the issue, such as faulty wiring or RCCB replacement.
Should I replace the RCCB or repair the wiring?
A professional electrician must test first. Replacing RCCB without fixing the root cause may not solve the problem.