A: The 2011 edition has been replaced and is no longer considered current. For new projects and compliance, you must use IEC 61439-1:2020 (including its corrigenda).
The older IEC 60439 standard categorized panels into Type-Tested Assemblies (TTA) and Partially Type-Tested Assemblies (PTTA). This created ambiguity. IEC 61439-1 eliminated these terms, introducing a unified concept called .
IEC 61439-1 is part of a larger series that defines the requirements for "assemblies"—the technical term for low-voltage electrical panels. It covers systems with a rated voltage of up to or 1500 V DC .
Performing dielectric tests or measuring insulation resistance to ensure no short circuits or insulation breaches exist.
Distribution boards intended to be operated by ordinary persons (DBO). iec 61439-1 standard pdf
Official copies of the standard are copyrighted documents. You can obtain the official through legitimate standards organizations: IEC Webstore: The official international publishing portal.
IEC 61439-1 is the foundational standard for low-voltage switchgear assemblies rated up to 1000 V AC or 1500 V DC. It acts as an umbrella document. You cannot use Part 1 alone to certify a product; it must be paired with a specific product part, such as:
However, because the official PDF is protected by copyright and sold for a fee (typically between 250 and 400 CHF), many users search for a free copy—leading to risks.
: Responsible for the final assembly of the unit and performing "routine verifications" to ensure the specific unit was built correctly according to the original design. Technical Refinements in Recent Editions The latest revision, IEC 61439-1:2020 (Edition 3.0) A: The 2011 edition has been replaced and
Dictates the physical air gaps and surface distances required to prevent electrical arcing based on insulation ratings.
Involves physical testing of a prototype or sample to verify performance under real-world conditions. Key test categories include:
Introduction of specific rules for Class I and Class II assemblies regarding electric shock protection.
Verification can be achieved through three methods: This created ambiguity
Scope and purpose
Power switchgear and controlgear assemblies (Main distribution boards). IEC 61439-3: Distribution boards (DBs). IEC 61439-4: Assemblies for construction sites (ACS).
You can access official previews and purchasing options for the IEC 61439-1:2020 IEC Webstore or view technical guides from manufacturers like specific tests