http://www.rinnai.com.my/product/category/9/64

Is this Rinnai brand of water heater is the only instance water heater that comes with RCD? Even the popular brand like Alpha are having ELCB only.

http://www.alpha-electric.com/showroom_smart-series_18i.html

Any technical guys can confirm this?

In Malaysia, this type of unit is available by some electrician.

hi all,

i have elcb installed beside WH switch n-th years back (refer to attached pic):


May i know whether i should replace it to RCCB with 10mA sensitivity?

That is rccb too.

If change 10mA might too sensitive. 30mA should be alright.

a 10mA RCD will save a life..

at 230V 30mA AC 50Hz can still kill a smaller sized individual..

The heater have another set of rccb of 10mA.

You might just need a 30mA less sensitive for a nuisance trip.

ozak & Richard - thanks for the inputs.

How do i check if the heater is equipped with RCD 30mA?

The water heater must be equipt with a 10mA RCD..

That is the current mandatory requirement set by Suruhanjaya Tenaga..

Edit.. the RCD will usually have a test button to press ..
Leaking a small current to ground thus tripping out the electricity supply..

If it doesn't trip then the earth wiring is suspect or the RCD is faulty..

my old heater states ELCB instead.
nothing about RCD/RCCB.

An ELCB works with voltage difference..

An RCD works with residual current difference..

As long as your earth wiring is solid, your wiring insulation is good and your protection devices work properly you are safe..

Recommended cables for installation of water heater.

that link you gave doesnt say how many litre of water that tub can hold
anyway for joven storage heaters you can see at the same shop = http://www.ewarehouse.atkc.com.my/index.ph...joven%20storage
the prices between each capacity is not a big difference

this storage heater is normally install above your bathroom ceiling board. each bathroom one heater. for bathroom with only shower, a 25L tank is enough
you need to find out if your bathroom already have copper piping for hot water and also electrical point for the tank. Also find out how much ceiling space you have for the tank to fit up there

you said you are buying a new tub, are you replacing or adding it in?

I only turn on my heater just before I go in and shower and off it once I am done or after the next person is done. It always have left over hot water inside the tank so you dont really need to like wait 20 mins for water to heat up. Only the first time you use it, you need to wait.

Recommended cables for installation of water heater.

Change the MCB.

The MCB contact is dirty.

Hi need advise here. Last year my newly installed water heater caused my mcb to make loud buzzing sound when turn on. As suggested by ozak, i ask electrician to change mcb and the sound stop. And today, after 1year, i just noticed that the buzzing sound coming back but it was less noise compare to previous. So was it normal or is there any other issue causing mcb to keep getting spoilt?

It is not getting spoil but the contact inside the MCB dirty. It cover with carbon which cause the static jump between. That cause the buzzer sound.

Do you always ON/OFF the MCB ?

Try ask the electrician check the wire secure to the mcb correctly. Screw tightly the wire on the mcb. Loose wire may cause the same problem.

Change to more good quality mcb.

Makesure the MCB rate at C20 (20A).