On 10/07/2017 09:31, Ed Pawlowski wrote:
On 7/9/2017 9:28 PM, Lenny Jacobs wrote:
When a breaker is tripped, it's always the main breaker, not the
individual breaker. Shouldn't the individual breaker be tripped first?

This is troublesome because I then have to turn off all individual
breakers with the main breaker on and flip each breaker to see which
one causes the trouble.


What is the rating of the main breaker? What is the load? if the main
is 100 and you have a bunch of 20A breakers pulling 15A the group would
trip the main.

You should do some analysis to see if you are overloading the panel. If
you added Central AC, larger water heater,dryer, electric range, they
may not be a problem individually but together, too much for the main.

Thanks for the reply. That's no the problem. I can always trace the
problem to one single breaker and flip it. That solves the problem for
quite a while. When it is dry season, there is no breaker problem. When
the four month raining season comes, some breakers would trip. I don't
know if it is due to moisture or underground short circuit. I flip those
offending breakers and everything is good, except I don't have garden
lights and others which I have yet to figure out what they are. There
are so many breakers in the box. I don't know which one is for what.