Iec 614391 And 2 Pdf ~upd~ Jun 2026

IEC 61439-1 and IEC 61439-2 are the international standards that govern the safety and performance of low-voltage switchgear and controlgear assemblies. Together, they replace the older IEC 60439 series to provide a more rigorous and structured framework for electrical installations. Core Functions of Parts 1 and 2

Both parts (1 & 2) eliminate the old concept of "partially type tested assemblies" (PTTA). Now, every assembly must be – by test, calculation, or comparison with a verified reference design. iec 614391 and 2 pdf