RCCB trip on heavy lightning

mascot123 — Mon, 13 Nov 2023 16:45:47 +0800

Hi all sifu,

My house have two db, ground and first floor. After reading alot here and fb, I separated both circuit to have 100ma for lights and 30ma for power.

Weird thing is when heavy lightning, only the first floor 30ma rccb for power is tripped. I dont turn off my pc so I want to eliminate the tripping issue.

So far I engaged licensed pw4 electricians to check
-earth grounding already below 10ohm
-insulation/meager test no issue

Some thing to note:
Before this the same circuit trip during rain. I have a water pump installed on the roof. Already tried isolate that the pump cause trip whenever it rains. So i rewired the wiring for the pump but still trip when rain. Then I replaced the pump itself as it is leaking as well. Now normal rain no more tripping

I want to ask what else can I do at this point? Does it make sense that it trip only first floor 30ma rccb? Does type 2 SPD help?

The rccb is hager 40a 30ma, i installed when splitting the circuit

Renovation cost

mascot123 — Thu, 17 Sep 2020 07:45:26 +0800

Hi all sifu, need some advise, want to extend below, no wall hacking. I got quoted around rm11k but not sure if the price is too expensive? Im expecting half the price. One of the picture done halfway is not my house, just taking my neighbour house pic

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RCCB trip on heavy lightning

Renovation cost