Some people can have this phobia of electrocuted by these water heaters as there are cases.

Solar heater is only practical to be installed at landed property, double storey homes or something similar. Not feasible for condominiums or apartments.

What we have in home and the fuse box is minimum safety level or pretty basic. We are not rich country. So the design safety is minimum to meet the std here. Otherwise you have to pay high house price.

Have you ask why people still die since the fuse box there.

Why the heater have a built in rcd or elcb if the house already have. Don't they want to save some cost? Can't the house rcd to the job?

Why people still die since the heater have rcd/elcb. And why the fuse box rcd doesn't kick in if the heater rcd/elcb fail to protect.

My condo which less than 2 years old, does not have an individual RCD for water heater point in DB, only one for the whole house.
Planning to install two 10mA RCD and change to a bigger DB.

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This is a Panasonic instant water heater (with built-in ELCB) which I installed by myself 3 months ago. 

So far so good with the water pressure.

I would like to purchase RCCB for my instant water heater shower use.
What kind of RCCB specification do I required to purchase?
The instant water heater shower that I have now:

Panasonic DH-3NDP1MS, 3.6kW, DC Jet Pump.

RCCB specification:
1) 10mA / 30mA?
2) Type A / Type AC?

Bought the exact Hager model.
Can't afford Type A RCCB from Schneider.

The DB already have a rccb. Why install another 1 that so near?

The extra rccb for heater is mean to install as near as possible to the heater side.

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

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.