1、NORME?CEIINTERNATIONALE?I E CINTERNATIONAL721-2-8STANDARD?Premire ditionFirst edition1994-06Classification des conditions denvironnement-Partie 2:Conditions denvironnement prsentes dansla nature-Section 8:Exposition au feuClassification of environmental conditions-Part 2:Environmental conditions app
2、earingin nature-Section 8:Fire exposureIECNumro de rfrenceReference numberCEI/IEC 721-2-8:1994LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.Validit de la prsente publicationLe contenu technique des publications de la CEI est cons-tam
3、ment revu par la CEI afin quil reflte ltat actuel dela technique.Des renseignements relatifs la date de reconfirmation dela publication sont disponibles auprs du Bureau Central dela CEI.Les renseignements relatifs ces rvisions,ltablis-sement des ditions rvises et aux amendements peuventtre obtenus a
4、uprs des Comits nationaux de la CEI etdans les documents ci-dessous:Bulletin de la CEIAnnuaire de la CEIPubli annuellementCatalogue des publications de la CEIPubli annuellement et mis jour rgulirementTerminologieEn ce qui concerne la terminologie gnrale,le lecteur sereportera la CEI 50:Vocabulaire E
5、lectrotechnique Inter-national(VEI),qui se prsente sous forme de chapitresspars traitant chacun dun sujet dfini.Des dtailscomplets sur le VEI peuvent tre obtenus sur demande.Voir galement le dictionnaire multilingue de la CEI.Les termes et dfinitions figurant dans la prsente publi-cation ont t soit
6、tirs du VEI,soit spcifiquementapprouvs aux fins de cette publication.Symboles graphiques et littrauxPour les symboles graphiques,les symboles littraux et lessignes dusage gnral approuvs par la CEI,le lecteurconsultera:la CEI 27:Symboles littraux utiliser enlectro-technique;la CEI 417:Symboles graphi
7、ques utilisablessur le matriel.Index,relev et compilation desfeuilles individuelles;la CEI 617:Symboles graphiques pour schmas;et pour les appareils lectromdicaux,la CEI 878:Symboles graphiques pourquipements lectriques en pratique mdicale.Les symboles et signes contenus dans la prsente publi-cation
8、 ont t soit tirs de la CEI 27,de la CEI 417,de laCEI 617 et/ou de la CEI 878,soit spcifiquement approuvsaux fins de cette publication.Publications de la CEI tablies par lemme comit dtudesLattention du lecteur est attire sur les listes figurant la finde cette publication,qui numrent les publications
9、de laCEI prpares par le comit dtudes qui a tabli laprsente publication.Validity of this publicationThe technical content of IEC publications is kept underconstant review by the IEC,thus ensuring that the contentreflects current technology.Information relating to the date of the reconfirmation of the
10、publication is available from the IEC Central Office.Information on the revision work,the issue of revisededitions and amendments may be obtained from IECNational Committees and from the following IECsources:IEC BulletinIEC YearbookPublished yearlyCatalogue of IEC publicationsPublished yearly with r
11、egular updatesTerminologyFor general terminology,readers are referred to IEC 50:International Electrotechnical Vocabulary(IEV),which isissued in the form of separate chapters each dealingwith a specific field.Full details of the IEV will besupplied on request.See also the IEC MultilingualDictionary.
12、The terms and definitions contained in the present publi-cation have either been taken from the IEV or have beenspecifically approved for the purpose of this publication.Graphical and letter symbolsFor graphical symbols,and letter symbols and signsapproved by the IEC for general use,readers are refe
13、rred topublications:IEC 27:Letter symbols to be used in electricaltechnology;IEC 417:Graphical symbols for use onequipment.Index,survey and compilation of thesingle sheets;IEC 617:Graphical symbols for diagrams;and for medical electrical equipment,I EC 878:Graphical symbols for electromedicalequipme
14、nt in medical practice.The symbols and signs contained in the present publicationhave either been taken from IEC 27,IEC 417,IEC 617and/or IEC 878,or have been specifically approved for thepurpose of this publication.IEC publications prepared by the sametechnical committeeThe attention of readers is
15、drawn to the end pages of thispublication which list the IEC publications issued by thetechnical committee which has prepared the presentpublication.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.IECNORMEINTERNATIONALEINTERNATIONALSTA
16、NDARDCEIIEC721-2-8Premire ditionFirst edition1994-06Classification des conditions denvironnement-Partie 2:Conditions denvironnement prsentes dansla nature-Section 8:Exposition au feuClassification of environmental conditions-Part 2:Environmental conditions appearingin nature-Section 8:Fire exposure CEI 1994 Droits de reproduction rservs Copyright all rights reservedAucune partie de cette publication ne peut tre reproduite niutilise sous quelque forme que ce soit et par aucun pro-cd,lectronique o
