how to choose component?

[hicham hicham]

hi guys hope that your doing good i need help
i want to know how to choose MCB RCCB...... contactor overload cable size etc,,,,, for any load
thnak you hicham

 

[buzzlightyear]

Calculate Size of Main ELCB & Brach MCB of Distribution Box - https://electricalnotes.wordpress.com/2015/10/02/calculate-size-of-main-elcb-brach-mcb-of-distribution-box/ this might help.

 

[Lucien Nunes]

The question is a broad one and the answer would fill a book, so not easy to answer on the forum. Also, although the principles are standard, the preferred methods will differ in detail under different regulations in different countries.

If you have a specific requirement, by all means post some detail.