mcb sizing

[cavecellar]

Hi Everyone,

I'm new to this forum, therefore this is my very first post.

Could anyone assist in sizing a mcb for a 9.7kw air condioning unit ?

ie. how this done.
regards
colin

[Ohmslaw]

Hi.

Basic ohms law will give you the aperage needed i.e 9700/230 = 42A.