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 using 30mA then I expect the nuisance trip will even worst!

Actually the 100mA is good enough, it trip yesterday when the aircon installer accidentally touch the wire.

I think most house in Malaysia use 100mA by default.

Thanks for the advice, I will give it a try, Where can I get Hager brand in Klang Valley area? Can I get it at Jalan Pasar?

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?

Start reading from post #97 onward !

I'm interesting in this ABB OVR T2 SPD (http://new.abb.com/products/ABB2CTB802341R8000), planing to install it in the DB



I'm wondering will it reduce the frequent RCCB trip when lighting hit nearby my house, I stay at the hill top, whenever lightning hit nearby, it is very high chance the RCCB will trip!

How much you paid for the SPD devices and installation? I'm tired of the nuisance trip, it has been 3 times for last 30 days

ABB OVR T2 SPD ordered from Taobao finally arrived, surprisingly it is imported from France, I though it is made in China

Just install it myself at the location before RCCB and after the main switch, hopefully it will prevent the RCCB to trip during lightning.

Hager is the RCCB, ABB is the SPD

I bought it around RM430, local seller quote me RM800+, my.rs-online.com selling around RM680

Yes, I know it does not follow proper wire color codes, because I went to three electrical shops, only one shop selling 10 mm^2 and 16 mm^2 by meter, and only black color is available, the RCD wiring was done by developer, I can see they didn't follow the color code either in some place at my house.

Actually I tried to use 16 mm^2 but I realized I couldn't use it as it is too big to fit in, so only 10 mm^2 wires are used.

It looks like running out of space, may need to change the DB box and add additional trail.

Agreed on surge protection and RCCB are protecting different scenario, RCCB protects human life from current leak, and SPD protects lightning strike damages.

But, RCCB often very sensitive to detect any current imbalance caused by lightning strike, thus, cause nuisance trip!

My ABB SPD have been installed for 1 month, there was a close lightning stroke my house nearby, my house alarm was triggered due to vibration, neighbor cars alarm was screaming! but this time, no power trip anymore ! I'd say SPD really effective to reduce or eliminate power trip caused by lightning strike!

Not really, I replaced my old RCCB with Hager RCCB, it still trip, just lesser, now I have installed the ABB SPD, so far it is already 4 months and not a single trip.

There are type 1, 2, 3 SPD,

Type 1 SPD protects from the directly lightning strike to your power supply line.
Type 2 SPD protects from indirectly lightning strike, this type of SPD is the one you install at your DB, it has less discharge current rating
Type 3 SPD protects sensitive equipment such as computer, AV equipments or electronic devices, type 3 SPD must install nearby your electronic devices.

In Malaysia, you will need type 3 SPD, if you stay at high ground or frequently lightning strike area, you will need type 2 SPD, if the power line is hanging in the air and connect to your house and your house is at the highest point, you better get type 1 SPD.