IEC 62561-4 pdf download Lightning protection system components (LPSC) – Part 4: Requirements for conductor fasteners 5.3Mechanical strength 5.3.1 Perpendicular and axial loads The design of the conductor fastener shall be such that it carries the perpendicular loadscaused by the weight of the conductor，snow,ice and wind and axial loads caused by thethermal expansion-contraction of the conductor and its weight. Compliance...