This Part 1 of IEC 62236 outlines the structure and the content of the whole series. It specifies the performance criteria applicable to the whole standards series. Clause 5 provides information about the management of EMC. Annex A describes the characteristics of the railway system which affect electromagnetic compatibility (EMC) behaviour. Phenomena excluded from the series are nuclear EM pulse@ abnormal operating conditions (e.g. fault conditions) and the induction effects of direct lightning strike. Emission limits at the railway system boundary do not apply to intentional transmitters within the railway system boundaries. Safety considerations are not covered by this series of standards. The biological effects of non-ionising radiation as well as apparatus for medical assistance@ such as pacemakers@ are not considered in this series.