Power Trips When the Air-Cond Turns On? A Common Electrical Risk in Old Homes at Puchong BK 5
Mrs. Lim lives in an older house in Puchong BK 5. For many years, her home’s electricity worked fine until a frustrating problem began to appear. Every time she switched on the air-conditioner, the entire house tripped.
At first, it only happened occasionally, so she didn’t think much of it. But over time, the situation worsened, until it started happening almost every day. Thinking the air-conditioner was faulty, she called an air-cond technician to inspect it. The result was unexpected the air-conditioner was perfectly fine.
The real problem was hidden in a place many homeowners overlook: the DB Box (Distribution Board).
The Real Danger Was Inside the Old DB Box
When we opened Mrs. Lim’s DB box on site, the issue was immediately clear:
- The DB box had not been replaced for over 20 years
- Old plastic casing, brittle and aged
- Outdated circuit breakers with slow response
- No RCCB protection that meets current safety standards
- Multiple circuits running under long-term overload
Each time the air-conditioner started, the sudden surge of current caused the system to trip. The old DB box simply could not handle the load. This was not just an inconvenience it was a serious safety risk. If the breaker were to fail one day, overheated wiring, short circuits, or even electrical fires could occur.

Why Old Homes in Puchong BK 5 Trip So Easily
When many older homes were built, electrical usage was minimal.
Back then:
- One air-conditioner was enough
- No instant water heaters
- No induction cookers
- No home offices
Today’s households often run:
- Multiple air-conditioners
- Washing machines and dryers
- High-power kitchen appliances
- Autogate systems
- Computers, routers, and smart devices
- Old DB boxes were never designed for today’s electrical demand.
The Solution: Upgrade to a Safe, Compliant DB Box
We upgraded Mrs. Lim’s home with a modern, metal-clad DB box that complies with Malaysian electrical safety standards, including:
- Properly sized MCBs based on actual load
- High-sensitivity RCCB for shock protection
- Surge Protection Device (SPD) for lightning safety
- Neatly reorganized wiring with clear circuit labeling
- Spare capacity for future electrical upgrades
After the upgrade:
- Air-conditioner runs smoothly without tripping
- Stable power throughout the house
- Improved electrical safety
- Peace of mind for the entire family

Warning Signs in Old Homes You Should Not Ignore
If you live in Puchong BK 5 and notice any of the following, your home should be checked immediately:
- Power trips when air-cond or washing machine is turned on
- Flickering lights
- Burning or smoky smell near the DB box
- Warm switches or breakers
- Plastic DB box still in use
- No RCCB or old ELCB installed
- DB box has never been upgraded
These are early warning signs of potential electrical accidents.
Puchong BK 5 | Professional Electrical Services
We specialize in safe electrical upgrades for old homes, including:
- DB Box Upgrade (Plastic → Fire-Resistant Metal)
- Electrical fault detection & troubleshooting
- Lightning & surge protection installation
- Earthing & grounding system improvements
- Electrical safety inspection for old houses
Call Alex: 012-870 2699
Serving Puchong BK 5 & the entire Klang Valley
Don’t wait for an electrical fire or shock to happen before taking action.
Many dangers start quietly inside your DB box.





