I live in Hong Kong and they kind of adopted British electrical standards.
I said "kind of" because they only use Class C (Commercial) MCB; Class B cannot be bought locally. I asked around and they all look at me like I have 2 heads.
The effect of this, based on product specification, is that over-current protection is not as sensitive. This also affects the RCBO protection because they are also rated for Commercial uses (less sensitive; takes more current to trip).
How do I figure out if I can install proper B class residential MCB and RCBO so that it is safer?