BS EN IEC 60079-25:2022 Incorporating corrigenda October 2020 and November 2022 BSl Standards Publication Explosive atmospheres Part 25: Intrinsically safe electrical systems bsi. BS EN IEC 60079-25:2022 BRITISH STANDARD National foreword This British Standard is the UK implementation of EN IEC 60079-25:2022. It is identical to IEC 60079-25:2020 incorporating corrigenda October 2020 and November 2022. It supersedes BS EN 60079-25:2010, which is withdrawn. The start and finish of text introduced or altered by corrigendum is indicated in the text by tags. Text altered by IEC corrigendum October 2020 is indicated in the text by Aci (Aci, and that altered by corrigendum November 2022 is indicated by [Ac2) (Ac]. The UK participation in its preparation was entrusted to Technical Committee EXL/31, Equipment for explosive atmospheres. A list of organizations represented on this committee can be obtained on request to its committee manager. Contractual and legal considerations This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law. This publication is provided as is, and is to be used at the recipient's own risk. The recipient is advised to consider seeking professional guidance with respect to its use of this publication. This publication is not intended to constitute a contract. Users are responsible for its correct application. This publication has been prepared under a mandate given to the European Standards Organizations by the European Commission and the European Free Trade Association. It is intended to support requirements of the EU legislation detailed in the European Foreword. A European Annex, usually Annex ZA or ZZ, describes how this publication relates to that EU legislation. For the Great Britain market (England, Scotland and Wales), if UK Government has designated this publication for conformity with UKCA marking (or similar) legislation, it may contain an additional National Annex. Where such a National Annex exists, it shows the correlation between this publication and the relevant UK legislation. If there is no National Annex of this kind, the relevant Annex ZA or ZZ in the body of the European text will indicate the relationship to UK regulation applicable in Great Britain. References to EU legislation may need to be read in accordance with the UK designation and the applicable UK law. Further information on designated standards can be found at www.bsigroup.com/standardsandregulation. For the Northern Ireland market, UK law will continue to implement relevant EU law subject to periodic confirmation. Therefore Annex ZA/zZ in the European text, and references to EU legislation, are still valid for this market. BRITISH STANDARD BSENIEC 60079-25:2022 UK Government is responsible for legislation. For information on legislation and policies relating to that legislation, consult the relevant pages of www.gov.uk. @ The British Standards Institution 2023 Published by BSI Standards Limited 2023 ISBN 978 0 539 25653 6 ICS 13.230; 29.260.20 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2022. Amendments/corrigenda issued since publication Date Text affected 30 April2023 Implementation of IEC corrigendum November 2022