Not true. I been using 30mA for many many yrs. Last time I always have this nuisance tripping. Go to electrical shop and ask for the solution from the bos. Told me to change to a better 1 and abit expensive. Brand hager and cost rm120. Change it and now less trip.

Use a better way to solve the problem and not downgrade the safety. You still have a solution like earthing and surge protector.

The original RCCB from the house developer is 100mA. Trip like hell. Change it to better brand Hager 30mA. Less trip.

So it doesn't logic to me that 100mA give less problem. And compromise the safety.

You can get it at any electrical shop. It is not branded item now.

Here are some information and understanding about RCCB.

 RCD_The_Best_Way_To_Guarantee_Electrical_Safety_At_Home1.pdf ( 60.29k ) Number of downloads: 939
 RCD_The_Best_Way_To_Guarantee_Electrical_Safety_At_Home.pdf ( 129.5k ) Number of downloads: 840


Why nuisance trip, what happen and some solution without compromise the safety.

 Solution.pdf ( 171.31k ) Number of downloads: 1641


This post has been edited by ozak: Dec 1 2012, 05:58 PM

Can it trip? Press the test button to try it.

You can change it yourself. Not difficult. Just makesure OFF the main MCB or takeout the fuse. 2 wire in and 2 wire out. Some maybe have direction of incoming and outgoing. Some don't.

If no confident, buy the RCCB and ask the bos change it for you. Pay some fee.

Beside hager, you can get the ABB anti nuisance trip 30mA RCCB. Read the pdf file above.

RCBO is a good idea too. It have extra protection than RCCB. It use after the main RCCB.

I m using RCD+fuse 30mA for heater, kitchen and fountain. Install inside toilet nearer to heater.

It is a RCD. Brand MK. Don't think can get it here and not selling anymore. Order it from UK 13yrs ago.

You are mis inform. 300mA is not safer. You get short and the rccb is not easily trip. That's not call safer.

Lightning happen and the rccb not easily trip. That is call better.

100mA is more easily trip because it is more sensitive to detect minor fault. Which of course have problem with big bow of lightning. The easy and less cost way is just change it to 300mA. It still will trip but lesser.

The meaning of the number like 100mA or 300mA is how much the current detect will trip the rccb. Lower figure is safer.

The purple color is the constant hot temperature at the contact surface surrounding side. After long period of hot temperature, the material will change color. That show ..
1) A high current is flowing without sufficient surface contact between. Create a bottle neck at that place. This cost resistance and hot temperature occur.
2) Loose connection cost the electron hard to flow over within 2 contact. Occasionally some spark will happen. Resistance and hot temperature occur.

If you can, change that fuse holder to mcb type. Outside your house beside the meter is already have the fuse protect. (black square box) You don't need another fuse in the DB box. That is for the developer cut cost. MCB have better switch surface contact.

Just my bullshit CSI. He....

Just put the MCB upside down. The look is same. Just the switch handle opposite.

I remember abb have some device that can prevent trip from lightning. It just install beside the mcb.

Your rccb is fine. So for easy solution, just change it to 300mA.

This --> "So for easy solution"

For proper way, that cost you a lot. Try check at ABB site.

Ain't the fish already belly up?

RCCB trip is telling you that something is shortcircuit. But not overload. If it overload, the MCB through that line will trip.

Since you able to isolate the problem and only that line cause the trip, it is much more easy to troubleshoot. But your electrician diagnose wrongly. Since all the light and electrical thing able to ON without cause the MCB trip, that mean there is no overload on that line.

For the shortcircuit, you have to look at the lighting, timer, fan, etc on that line. There is something faulty there. But which 1. So you need to further isolated those thing to 1 by 1 or by the switching group. ON 1 switch at a time and see will it trip. If no, than OFF it and proceed another switch ON. Till you find that cause tripping.

If this group of light cause tripping, than need to further isolate which light is cause the trip. You need to disconnect the light 1 by 1 and try to ON to find that spoil 1 that cause the trip.

RCCB is not the problem. It work fine. RCCB is not using earth to trip cause it is not a ELCB.

You have 3 choice to reduce the trip.

1) change the RCCB to less sensitive to 300mA or 0.3A. But will delay the trip if any short circuit.
2) Install a surge protector to absorb the surge voltage. It will channel the surge to earth. So your earth rod need to be good.
3) Check the earth rod infront your garden. The checking is in Ohm which less ohm is better. (below 100ohm)

The earth rod only can be check with earth meter. Which some electrician have.

You can try to change. But the 0.1A is sensitive. It still will trip. But lesser.

Leave it to the electrician to check if you not experience.

Electric can kill. Don't touch if you really not sure.

Your house is running 3P. Phase to phase is 415V. It is dangerous.

It is sometime not cause by the elcb.

The surge go through the old wire and trip it. You can try to replace the elcb to new 1.

If problem still happen, time to change the wiring.

You can replace to a more sensitive RCD. But you probably will get nuisance trip more frequent.

You can change the RCD to 63A rate. 40A or 63A is a max load on the device.

Having SPD is good. But it is not 100% protected to all your device.

Lightning can be come from many way. From the main supply, wire around the wall, service provider network (Lan wire) etc.

Important is to check your earth is sufficient. And additional SPD nearer to your sensitive device. Lan network too.

So far non.

But there is a motorize auto reset device for RCD. It will auto reset few time before totally off. Don't recommend to use. Not safe.

What I do is, change the RCD. The nuisance trip prevent type. I m using ABB.

I plunge another ground rod at the right side of the house in the garden. Original ground rod and wired on the left. 3 pcs connected rod totally 6m. 6mm earth wire into the AV cabinet and distribute to others wall socket. The wall socket is inside the cabinet. So the earth wire cannot see. I confirm the earth wire is running good by the Belkin earth led light up. Before that, it either no light or fade blinking.

Doing this 2 thing solve my 80% of nuisance trip.

Remaining thing I would like to do is install SPD in the DB. Already brought but haven't install yet. Plan change all the MCB and install together. Distribute more new earth wire to others wall socket. If can, plunge another ground rod behind the house and more SPD far from DB.

The main goal is, shorten the earth wire into the ground.

What I always do for the fridge is, I freeze more ice in the bottle/container/gel before long holiday. In case it trip, extra ice prolong the cold. My experience is it last about 3days.

So expensive the SPD ?

Local have many such SPD sell. Pretty common device. Sheineider, Hager, ABB etc

ABB cost RM275. Hager cheaper.