Please Explain MCCB Rating and Sutable Cable Size

Can somebody translate please?

I think it's something to do with the last question, but then you never know.

Well, it's a slow weekend... lets try breaking it down into workable parts.

"please explaine MCCB rating": MCCBs are rated for the amps they will carry and/or trip at. So a 30A MCCB is rated to carry 30A and will trip at 30A or more.

"and suitable cable size if I am calculating inunsive load": Hmmm... I'll assume you meant inductive load, as in an induction motor. Size the cable per your local electrical codes. Here in the US we are required to size motor cables for 125% of the motor FLC from a table in our code book, the National Electric Code (NEC) that determines standardized motor FLCs for the different available voltage levels. I don't know where you are, so I cannot comment on what your local electrical codes may require.

"how much i add for selecting breaker 10%?": Hmmm... add to what? 10% of what? This is just too unclear to even attempt.

10 out of 10 for effort

What is "explaine"?...what is "sutable"?...what is "inunsive"?.....For whatever selection you have to add money.

Cables and circuit breakers should be selected based upon the load characteristics like resistive,capacitive,inductive,motor /starting method ,length etc. But as a rule of thumb cable sizes are related to CB size to prevent cable from getting damaged-by tripping the CB in time. Some ratings are:1.5mm^2-20A,2.5mm^2-30A,4mm^2-40A,6mm^2-32A,10mm^2-40/50A,16mm^2-63A,25mm^2-80A,35mm^2-100A etc etc