On Sat, 15 Jul 2017 01:33:44 -0400, wrote:

On Sat, 15 Jul 2017 11:57:51 +0630, Lenny Jacobs
wrote:

On 15/07/2017 09:03, wrote:
On Sat, 15 Jul 2017 08:47:11 +0630, Lenny Jacobs
wrote:


As I have said earlier, I did ask an electrician about the tripping. He
just shrugged and said it's due to moisture. No need to fix it. Indeed,
during dry season, there is no problem even when all the four
problematic breaker are flipped up.

With that much fault current this is probably more than a little
moisture. I bet you have boxes filling up with water. I would start
with a visual inspection of all of your outdoor fixtures and junction
boxes. You might also have some splices underground that are not
waterproof. Without actually looking at your installation it is hard
to guess from half way around the planet. ;-)

I suspect it'd take more than just visual inspection. I see some
above-ground junction boxes. Not sure if there are underground junction
boxes. I do have an underground junction box for phone line. How to keep
water from getting into underground junction boxes? I have no clue.

You don't really keep the water out, you just use waterproof splices.
They are typically a crimp splice in a silicone filled tube. Above
ground you just be sure they are arranged to drain and that the
conductors are not near the bottom of the box or touching the sides.
Perhaps plant "umbrella plants" over the jboxes?????