Hi all

Would like to ask, does anyone install individual RCCB outside the bathroom on each of their water heater?

There is a central RCCB at the DB box in the living room, but I've read somewhere for water heater it's best to install RCCB nearest to it possible. Was thinking of installing individual RCCB and ELCB as well, but have read that if you have RCCB you don't need ELCB, and some recommend MCB + RCCB.

Already install MCB for each of the AC outlets and the oven.

Your advice is highly appreciated.