The rules of this part of IEC 60364 are intended to provide requirements for the safety of electrical installations in the event of voltage disturbances and electromagnetic disturbances generated for different specified reasons. The requirements are arranged into three sections as follows: Clause 442 Protection of low-voltage installations against temporary overvoltages and faults between high-voltage systems and earth. Clause 443 Protection against overvoltages of atmospheric origin or due to switching. Clause 444 Measures against electromagnetic influences. This consolidated version of IEC 60364-4-44 is based on the first edition (2001), its amendment 1 (2003) and its amendment 2 (2006).