Iec 60865-1 -

When a short-circuit occurs, the current can rise to 10–20 times the nominal rating within milliseconds. This isn't just a nuisance—it's a destructive event:

The impact of forces acting on rigid and flexible conductors. Thermal Effects: The heating impact on bare conductors. iec 60865-1

A key contribution of IEC 60865-1 is the differentiated approach to conductor types: When a short-circuit occurs, the current can rise