Cable size recommendation for surge protection SPD type 1 and type 2 according to IEC 60364

The conductor must resist a short-circuit current during the maximum protection system cutoff time.

IEC 60364 recommends at the installation incoming end a minimum cross-section of:

• 4 mm² (Cu) for connection of Type 2 SPD
• 16 mm² (Cu) for connection of Type 1 SPD (presence of lightning protection system).

Released for:Schneider Electric Thailand