The standard, which previously governed low-voltage switchgear and controlgear assemblies, has been formally withdrawn and replaced by the IEC 61439 series . For modern installations and compliance, professionals should refer to IEC 61439-1 and IEC 61439-2. Transition from IEC 60439 to IEC 61439
You can find full technical details and diagrams in the following PDF resources: iec 604391 pdf install
IEC 60439-1 is an international standard that defines the definitions, service conditions, construction requirements, technical characteristics, and tests for low-voltage switchgear and controlgear assemblies. IEC 60439-1 The standard
While specific "install" articles often focus on software or illegal downloads, the technical standard itself outlines the following for physical installation and assembly: iec 604391 pdf install