MCB = Miniature Circuit Breaker
ELCB = Earth Leakage Circuit Breaker

MCB - is an electrical switch to prevent damange from short circuit or overload
ELCB - a device with high earth impedance to prevent shock. The main purpose is to prevent injury to humans due to electric shock.

Btw from your case, it seems that it is a trip from ELCB instead of MCB, better call for your wireman to have a check.


I will share out a small common "question" by house owner regarding the electrical problem. Not really a problem but in fact just some small issue that I always have a question mark when I was kid.

Sometimes when you turn on/off a power switch, you will see sparkling happen on the switch button, this can be due to 2 reasons, the quality of switch or the other reason is due to the air's dielectric constant is broken. Let say you have 2 terminals and the distance between those terminals is about few cm and when the air's dielectric constant strength is broken the air will behave like conductor. Then you can observe the spark there