This second edition cancels and replaces the first edition published in 1990. This edition constitutes a technical revision. This edition included the following significant technical changes with respect to the previous edition: Terms and definitions have been revised to align with those used in the documents listed in the normative references. It has the status of a horizontal standard in accordance with IEC Guide 108.
IEC 60050-426:2020 gives terms specifically relevant to explosive atmospheres. This new edition reviews and complements the previous one. This terminology is consistent with the terminology developed in the other specialized parts of the IEV. It has the status of a horizontal standard in accordance with IEC Guide 108.
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