Hi folks,

My family and I are living in a terrace house.
Recently my dad changed our 25-yr old voltage-based ELCB to a newer current-based RCCB (Wylex 2Pole 40A with 100mA sensitivity)

After that it start nuisance tripping a lot during storms, even if the lightning is far away.
When no storm, everything is OK.

I was surprised even 100mA also trips a lot, if 30mA of course I can understand the tripping.

Any RCCB users here on 100mA sensitivity? Do yours trip frequently during storms? If yes, what did you do to mitigate the annoyance?

This post has been edited by socratesman: Mar 15 2011, 12:30 PM

ermm...i said 100mA

didn't realise helpful helob resurrected my thread lol

After some research, I suspect background leakage from the internal wiring (my house is 30+ yrs old).
Say, maybe about 60-70mA worth of background leakage between Live and Neutral.
So the tiniest of surges from lightning could be enough to send the Live-Neutral delta over 100mA => TRIP

damn, now must check all the circuits in the house..mafan

Omg I'm the TS and forgot to update mine lol.
We Replaced RCCB with similar specs but diff brand (hager) and no more thunderstorms trip since.