On 07/10/2017 08:54 PM, Lenny Jacobs wrote:
On 10/07/2017 23:48, wrote:


OK - Euro system. Different problems. No "load balance" issues. 2
"main breakers" in the building. One never trips. The other trips when
it is wet outside. You have external lighting circuits on that main.
You most likely have leakage in those 2 circuits, not enough to trip
the branch breakers, but enough to load the main heavily enough that
the rest of the loads, combined with the circuit leakage, overloads
the main. Find out what is on the circuits in question and get those
circuits checked and fixed - or permanently disconnected.


I flipped the offending breakers to turn them off until dry season
comes. Then, I turn them on. The only difference I notice is the
garden lights.


It sounds like your electrical system was installed by an imbecile. A
proper electrical system will work in all weather.