This part of IEC 60364 provides requirements for: protection of live conductors, PEN conductors, PEM conductors, and PEL conductors against the harmful effect caused by overcurrent. coordination of measures for protection against overcurrent NOTE 1 The requirements of this standard do not take account of external influences. NOTE 2 Protection of conductors according to this standard does not necessarily protect the equipment connected to the conductors. NOTE 3 Flexible cables connecting equipment by plugs and socket-outlet to fixed installations are not part of the scope of this standard and for this reason are not necessarily protected against the harmful effect caused by overcurrent. NOTE 4 Disconnection does not mean isolation in this standard.