IEC 61439 defines design and routine verification for low-voltage switchgear and controlgear assemblies. Builders must demonstrate temperature rise, dielectric properties, short-circuit withstand, and protection against electric shock.

Original manufacturer data and derived assembly rules help panel shops avoid full type testing for every configuration. Clear labeling of rated current, IP code, and forms of separation remains mandatory.

Align your FAT checklist with the standard’s verification methods and keep traceable records for every shipped board.