IEC 60439-2:1987 Low-Voltage Switchgear and Controlgear Assemblies Part 2: Particular Requirements for Busbar Trunking Systems (Busways) (Edition 2.0; Amendment 1-1991)
2005IEC 60439-2/AMD1:2005 Low-voltage switchgear and controlgear assemblies - Part 2: Particular requirements for busbar trunking systems (busways); Amendment 1
2005IEC 60439-2:2005 Low-voltage switchgear and controlgear assemblies - Part 2: Particular requirements for busbar trunking systems (busways)
2000IEC 60439-2:2000 Low-voltage switchgear and controlgear assemblies - Part 2: Particular requirements for busbar trunking systems (busways)
1987IEC 60439-2:1987 Low-Voltage Switchgear and Controlgear Assemblies Part 2: Particular Requirements for Busbar Trunking Systems (Busways) (Edition 2.0; Amendment 1-1991)