How to select the cable of the generator set that you buy

As generators cable selection generally follow the following principles:

Translated to 400/230V 50HZ example demonstrates

If the generator set is 50KW, then the current is 50X1.8 = 90A

General Cable per square millimeter can be about the safety of current 5A

90/5 = 18

Then to select 18 square cables, cable size selection must require greater than or equal 18, not too large, resulting in waste