I was looking thru one of the vendor in Malaysia (S***Sense) providing solution for lightning surge and I do see that they have RCD installation for heater (which is to be installed near to the heater unit). I therefore asked for a concealed solution and they told me that they can install something at a switch socket (as my house toilet are all with 15A socket point).

This is what the vendor showed me (I got the image online and get the exact match since I saw the Chinese word)

This is to replaced the normal socket outlet the center bottom is where the heater 3-core wiring goes in. This one triggers at 6ma at 0.025ms

As I later on did a search on the Chinese shopping website and find something nicer


As this one replace the double pole switch 20a, however it only triggers at 30ma at 0.025ms. I am just wondering if these devices are reliable and anyone tried it yet? I believe the socket type is tried otherwise why it can be found in Malaysia.

couldnt find any similar one from hager/clipsal/schneider..

This is the one that is on the vendor website. I asked my electrician if he can help install a junction box plus a RCD but he doesnt know anything about this thing... LoL...

So may I ask if I were to get a junction box, is it that the top left is live, right is neutral, bottom goes to heater wiring? The heater earth and the earth from db box just connect to the same screw holes?

Just like this video: https://www.youtube.com/watch?v=UIl9TXZm8Sw

Is it? I need to know more technically before I engage Safesense...

Anyway, just found out that China standards are RCD only, no ELCB at all. Just wonder why Msia still sticks to it, should have forcefully by law change to RCD at 30ma.

Why is it that the developer is using ELCB?

I do see waterproof case in a shop.. so it is better I use the case n get my electrician to install?

So the installer in it is certified? How much do they charge? Engaged before?

New house... in Nusajaya, Johor.

Also, if let's say I install a waterproof case, it is OK to install a RCD there? My unit is all with 15A socket, so can this socket connect to RCD and this RCD connect to heater? I assume it is OK while outside the toilet, there is normal double pole switch.

Should I use normal 1P+N RCD or 2P RCD?

Meaning DB box should be fitted with a RCD?

So is it OK if it is installed above e water outlet?

It means we are shortchanged? Anyway, replacement is to just replace this ELCB with a RCD right?

The model number is CE240B from Hager. Is this ELCB or RCD? Because I see this word Earth Fault Indicator...

Oh. So it is my misunderstanding? SO even a RCD also displays e earth fault indicator?