This part of IEC 62305 provides information for the design@ installation@ inspection@ maintenance and testing of electrical and electronic system protection (SPM) to reduce the risk of permanent failures due to lightning electromagnetic impulse (LEMP) within a structure. This standard does not cover protection against electromagnetic interference due to lightning@ which may cause malfunctioning of internal systems. However@ the information reported in Annex A can also be used to evaluate such disturbances. Protection measures against electromagnetic interference are covered in IEC 60364-4-44 [1] 1 and in the IEC 61000 series [2]. This standard provides guidelines for cooperation between the designer of the electrical and electronic system@ and the designer of the protection measures@ in an attempt to achieve optimum protection effectiveness. This standard does not deal with detailed design of the electrical and electronic systems themselves. 1 Figures in square brackets refer to the bibliography.