Dear ;
Adding to that said by Mr. Samman, be sure that the cables can carry their nominal currents defined by ” IEC 364-5-52 ” but with one condition that the selection of cable's section have been correctly done by taking into consideration :
– All correction factors accordingly to the working & installation conditions.
– The cables can withstand the short circuit currents specially at the 1st & 2nd levels of electric networks, or when we should use a small section of cables installed to the MDB.
Regards.