Distribution boards (intended to be operated by ordinary persons). IEC 61439-4: Assemblies for construction sites.
Verifying that the heat generated by the currents does not exceed the thermal limits of the materials, components, and enclosures.
Forms of internal separation (Form 1 up to Form 4b) to protect maintenance personnel from accidental contact with live adjacent circuits. Conclusion iec 614391 and 2 pdf
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Stringent rules for physical separation between conductive parts to prevent arcing. Key Technical Aspects in IEC 61439-2 Distribution boards (intended to be operated by ordinary
Resistance to electronic noise and suppression of emitted interference.
The IEC 61439 series separates general rules from specific product applications. Forms of internal separation (Form 1 up to
Use Part 1 + Part 2 for main switchboards, distribution panels in industrial plants, and motor control centers (MCCs). Use other parts (Part 3, Part 4, etc.) for specific applications like DBs for construction sites or public networks.
Ensure all assembly designs are verified (testing, comparison, or assessment).