This value shall be used for bare cables exposed to touch.
NOTE 1 Other values of k are under consideration for:
– small conductors (particularly for cross-sectional areas less than 10 mm2);
– duration of short-circuit exceeding 5 s;
– other types of joints in conductors;
– bare conductors.
NOTE 2 The nominal current of the short-circuit protective device may be greater than the current-carrying
capacity of the cable.
NOTE 3 The above factors are based on IEC 60724.