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Why have the different parts of the standards (switchboards, busbar trunking…) changed?

April 26, 2017busbar changed different Standards switchboards

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Why have the different parts of the standards (switchboards, busbar trunking…) changed?

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The structure has changed to be consistent with the IEC 60947-X switchgear and controlgear standards. The power switchboards are now covered by a specific standard, IEC 61439-2, whereas it was covered by a general rules standard.