IEC 60364-5-56:1980 Electrical installations of buildings. Part 5 : Selection and erection of electrical equipment. Chapter 56 : Supplies for safety services.
2009IEC 60364-5-56:2009 Low-voltage electrical installations – Part 5-56: Selection and erection of electrical equipment – Safety services (Edition 2.0)
1999IEC 60364-5-56:1999 Electrical installations of buildings - Part 5: Selection and erection of electrical equipment - Chapter 56: Safety services
1998IEC 60364-5-56/AMD1:1998 Electrical installations of buildings - Part 5: Selection and erection of electrical equipment - Chapter 56: Safety services; Amendment 1
1980IEC 60364-5-56:1980 Electrical installations of buildings. Part 5 : Selection and erection of electrical equipment. Chapter 56 : Supplies for safety services.