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I did not try to destroy the article, bur tried to make it easier to understand as asked for in the infobox at the start of the article. While editing I found taht the values used in the harmonic current table were obsolete: It used the third edition of the standard, whereas as of 1 april 2018 the fifthe edition of 2018 is now valid. Nevertehless, the values shown, and the classification of electrical equipment gives a good impression of the procedure used to test the elctrical equipment. May be the tables with values should be omitted (co[prright problems, a legal digital copy of the standard for a single user costs SFr 280.