Section 443 of BS 7671:2018+A2:2022 contains requirements for protection against transient overvoltages either of atmospheric origin or due to switching. Where the application of overvoltage protection measures are required, regulation 443.1 specifies that any surge protective devices (SPDs) should be selected and erected in accordance with Section 534 of that standard. This article looks at ...

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Electrium provides a brief overview of one specific update in the Corrigendum: overvoltage protection. It’s now well documented that the IET has updated certain requirements in Section 443 of BS 7671 Amendment 2. Those requirements relate to providing protection against transient overvoltages of an atmospheric origin or due to switching. The revised requirements of Regulation ...

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