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?

Hi,
As mention the ELCB for 100mA will trip frequently during storms is a norm. Its prove that your ELCB working. If the ELCB never trip at all, you are in trouble.  ELCB is a safety device used in electrical installations with high earth impedance to prevent SHOCK and to protect your SENSITIVE equipment/home appliances.

The ELCB rating should be as low as possible to prevent shock; do you think that 100mA is safe enough for human and equipment? NO. IEC 60479 stated that human cannot take in more than 7mA of leakage current. More than that are critical level and may cause to DEATH. Unfortunately, the current ELCB lowest rating is 10mA whereby still a risk to human against SHOCK. If you choose to use 30mA at your main, you will complain that it trip more frequent as compare to your assisting one (100mA).

I have the solution where comply to IEC 60479 and eliminate nuisance trip…

MCB detects overcurrent. Say, a 2.5HP aircon connected to 10A MCB, MCB will trip.
ELCB detects if any current running in the Earth conductor
RCCB detects residue current between L&N.

Earth Resistivity (Electrical Grounding) test using Earth Tester. Calculated in Ohm, the lower the ohm the better it is.

Insulation Tester (Mega Tester) is test the insulation capability of the cables. Measured in MOhm. The higher it is, the better.

Both Earth tester and insulation tester are not cheap at hundreds.

My house also get nuisance trip during thunder storm, I plan to change the TBC 100mA RCCB to Hager 100mA RCCB, would it help? and where to get the Hager RCCB?

if your earth is good it *might* help. do note that in my personal opinion you dont need an ELCB at all if you decide to go higher than 30mA. Its no use. The ELCB is meant to save a humans life if they get into the circuit. If your cutoff level is already deadly why even bother with it? Either you do it properly or no need to do at all. If nobody gets inside the circuit you're pretty safe without an ELCB.

can we buy and fix the RCCD ourself to replace my told ELCB ? 15 years no touch/change it..

or its better to recommend an "ëlectrician" to fix it ?

My parent house happen too only when got lighting. Without lighting everything o.k. The house only 7 years. Any solution for me?

Asking Hager 30mA RCCB around 5 shops in Puchong and Serdang, none of them carry 30mA, so just get the 100mA for RM80

I'm planing to install 30mA sensitivity RCBO to replace the MCB for the electric shower heater, is it better than install 30mA at the main switch?

has anybody used AOELEC Auto Reclosing (Resetting) RCCB before ?

How is the effectiveness ?

I understand it can auto rest 3 times and after the third time it has to be manually reset (for safety reason).
Can the resetting time be adjustable, ie to auto set after say 30 minutes it has tripped?

How much is the cost per unit ?

Thanks in advance.

dennis
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disconnecting an ELCB that cant by definition do what it should do because the threshold is too high is not silly. if the ELCB will only act AFTER its too late because its rating is too high what's the use? i can also place another spare on on top of my meter for the looks of it and it would have almost the same effect.