91.140.50 Electricity supply systems

Low-voltage electrical installations - Part 4-442: Protection for safety - Protection of low-voltage installations against temporary overvoltages due to earth faults in the high-voltage system and due to faults in the low voltage system (IEC 60364-4-44:2007 (CLAUSE 442) modified)

Electrical installations of buildings - Part 4-44: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances - Clause 443: Protection against overvoltages of atmospheric origin or due to switching

Low-voltage electrical installations - Part 4-44: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances - Clause 443: Protection against transient overvoltages of atmospheric origin or due to switching

Low-voltage electrical installations - Part 4-444: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances( IEC 60364-4-44:2007 (CLAUSE 444) modified)

Low-voltage electrical installations - Part 4-444: Protection for safety - Protection against voltage disturbances and electromagnetic disturbances

Low-voltage electrical installations - Part 4-46: Protection for safety - Isolation and switching

Low-voltage electrical installations - Part 4-46: Protection for safety - Isolation and switching

Electrical installations of buildings - Part 5-51: Selection and erection of electrical equipment - Common rules

Electrical installations of buildings - Part 5-51: Selection and erection of electrical equipment - Common rules (IEC 60364-5-51:2005, modified)

Electrical installations of buildings - Part 5-51: Selection and erection of electrical equipment - Common rules

Electrical installations of buildings - Part 5-51: Selection and erection of electrical equipment - Common rules

Low-voltage electrical installations - Part 5-52: Selection and erection of electrical equipment - Wiring systems (IEC 60364-5-52:2009 ,(modified+ corrigendum Feb. 2011)