IEC IEC81346-1 TSo Edition 2.02022-03 NTERNATIONAL STANDARD NORME INTERNATIONALE colour nside HORIZONTAL PUBLICATION PUBLICATION HORIZONTALE Industrial systems,installations and equipment and industrial products- Structuringprinciples and referencedesignations- Part 1: Basic rules Systemes industriels, installations et appareils, et produits industriels - Principes de structuration et désignations de référence - Partie 1: Regles de base IEC 81346-1:2022-03(en-fr) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2022 IEC, Geneva, Switzerland or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. Droits de reproduction reserves. Sauf indication contraire,aucune partie de cette publication nepeut etre reproduite ni utilisée sous quelque forme que ce soit et par aucun procede, électronique ou mecanique, y compris la photocopie et les microfilms, sans I'accord écrit de I'lEC ou du Comite national de I'IEc du pays du demandeur. Si vous avez des questions surle copyright de I'lEC ou si vous desirez obtenir des droits supplementaires sur cette publication,utilisez les coordonnées ci-apres ou contactez le Comite national de I'lEC de votrepays de résidence IEC Secretariat Tel.: +41 22 919 02 11 3, rue de Varembé [email protected] CH-1211Geneva 20 www.iec.ch Switzerland About the IEC The International Electrotechnical Commission(lEC)is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition,a corrigendum oranamendment might havebeenpublished. IECpublicationssearch-webstore.iec.ch/advsearchform IECProducts&Services Portal-products.iec.ch The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the variety of criteria (reference number. text,technical publications previews. With a subscription you will always have committee, ...). It also gives information on projects, replaced access to up to date content tailored to your needs. and withdrawn publications. Electropedia - www.electropedia.org IEC JustPublished-webstore.iec.ch/justpublished The world's leading online dictionary on electrotechnology. Stay up to date on all new IEC publications. Just Published containing more than 22 300 terminological entries in English details allnew publications released.Available online and once and French, with equivalent terms in 19 additional languages. a month by email. Also known as the International Electrotechnical Vocabulary (IEV) online. IEC Customer Service Centre - webstore.iec.ch/csc if you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre: [email protected]. A propos de Il'IEC La Commission Electrotechnique Internationale (lEC)est la premiere organisation mondiale qui elabore et publie des Normes internationales pour tout ce qui a trait a 'électricite, a i'électronique et aux technologies apparentees. A propos des publications IEC Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez 'édition la plusrecente,uncorrigendumouamendementpeutavoiretepublie. RecherchedepublicationsIEC. Decouvrez notre puissant moteur de recherche et consultez webstore.iec.ch/advsearchform gratuitement tousles apercus des publications.Avec un LarechercheavanceepermetdetrouverdespublicationsIEC abonnement, vous aurez toujours acces a un contenu a jour en utilisant differents criteres (numero de reference,texte