It's MCB that trips. ((Thanks, Therat... u are right. Didnt know the difference until I saw your links.))
It trips without any reason. Sometimes due to heavy rain, sometimes just outta the blue. Didn't notice that it trip after plugging in appliances.
I usually just flip the mcb back and its back to normal for a few weeks. My neighbours dont experience any tripping at all.
My HDB is about 16 years old liao, bought it resale, didnt do re-wiring when shifting in. Don't tell me already needs rewiring?
Am thinking of just calling an electrician. But have no contact at all. Any of you can recommend one that is honest and dont overpriced?
The SAGE uncles didnt do any checking, just keep on saying it should be due to appliances.
I googled megger tester, don't look familiar. Will try to see if can borrow ohmmeter instead.