1、364-4-45CIEC19843INTERNATIONAL ELECTROTECHNICAL COMMISSIONELECTRICAL INSTALLATIONS OF BUILDINGSPart 4:Protection for safetyChapter 45:Protection against undervoltageFOREWORD1)The formal decisions or agreements of the IEC on technical matters,prepared by Technical Committees on which allthe National
2、Committees having a special interest therein are represented,express,as nearly as possible,aninternational consensus of opinion on the subjects dealt with.2)They have the form of recommendations for international use and they are accepted by the National Committees inthat sense.3)In order to promote
3、 international unification,the IEC expresses the wish that all National Committees should adoptthe text of the IEC recommendation for their national rules in so far as national conditions will permit.Anydivergence between the IEC recommendation and the corresponding national rules should,as far as p
4、ossible,beclearly indicated in the latter.PREFACEThis standard has been prepared by IEC Technical Committee No.64:ElectricalInstallations of Buildings.The text of this standard is based upon the following documents:Six MonthsRuleReport on Voting64(CO)13664(CO)145Further information can be found in the Report on Voting indicated in the table above.
