DB Box Keeps Tripping in Singapore — Causes and How to Fix It

A distribution board (DB box) that keeps tripping is more than an inconvenience — it is a warning sign. Here is what is causing it and when to call a licensed electrician.

Why Is Your DB Box Tripping?

1. Overloaded Circuit

Most common cause. Too many appliances on one circuit exceed its rated capacity. Solution: redistribute appliances across circuits or add a new dedicated circuit.

2. Short Circuit

A live wire contacts a neutral wire, causing a sudden surge. Look for burn marks, charred outlets, or a burning smell. Requires immediate professional attention.

3. Ground Fault

The RCCB trips when it detects current leaking to earth — often through a faulty appliance or degraded wiring. Unplug appliances one at a time to identify the culprit.

4. Ageing Wiring

Wiring older than 20 years may have degraded insulation. This requires a full electrical inspection.

How to Reset Your DB Box

1. Turn off all appliances in the affected area
2. Find the tripped MCB or RCCB
3. Push it firmly to OFF, then back to ON
4. If it trips again immediately — call a licensed electrician

AOT Licensed Electricians — Same-Day Service

📞 6816 2462 | ✅ EMA-licensed | ✅ DB box inspection from $80 | All Singapore regions