This part of the IEC 61439 series applies specifically to busbar trunking systems designed for: : Up to 1,000 V AC or 1,500 V DC.

This article explains what is, why it matters for electrical engineers, and how to legitimately access the PDF.

The standard is the specific international regulation for busbar trunking systems (BTS) and their accessories . It replaced the older EN 60439-2 standard to align with the rest of the IEC 61439 series, which covers low-voltage switchgear and controlgear assemblies. Key Scope and Specifications