C.D.U./U.D.C.: 621.3.061(-194) 621.3.062(083) 744.423 COMMISSIONELECTROTECHNIQUEINTERNATIONALE (afflie I'organisation Internationale de NormalisationISO) NORMEDELACEI INTERNATIONAL ELECTROTECHNICAL COMMISSION (affiliated to the International Organization for Standardization -ISO) IECSTANDARD Publication 113-5 Premiere edition - First edition 1975 Schemas, diagrammes, tableaux Cinquieme partie : Etablissement des schemas et tableaux des connexions exterieures Diagrams, charts, tables Part 5: Preparation of interconnection diagrams and tables [roits de reproduction reserves -Copyright -all rights reserved Aucune partie de cete publiation ne put etre reproduite nlutliste sous Nopart of this publication may bereproduced or utlized in any queique forme que ce soit et par aucun procede, electronique ou meca- form or by any means, electronicor mechanical, including photocopying niquecomprislaphoocopeet lesmicrotms, sans I'acord ecritde'editeur and microfilm, without permission in writing from the publisher. Bureau Central de la Commission Electrotechnique internationale 1, rue de Varembe IEc FenAvA Suicca VoL. (o Prix Fr. S. 23.50 Price S. Fr. INTERNATIONALELECTROTECHNICAL COMMISSION DIAGRAMS, CHARTS, TABLES Part 5: Preparation of interconnection diagrams and tables FOREWORD 1) The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees on which all the National Committees having a special interest therein are represented, express, as nearly as possible, an international 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 in that sense. 3) In order to promote international unification, the IEC expresses the wish that all National Committees should adopt the text of the IEC recommendation for their national rules in so far as national conditions will permit, Any divergence between the IEC recom- mendation and the corresponding,national rules should, as far as possible, be clearly indicated in the latter. PREFACE This publication has been prepared by Sub-Committee 3B, Preparation of Diagrams, Charts and Tables. Item Designation, of IEC Technical Committee No. 3, Graphical Symbols. A first draft was discussed at the meeting held in Istanbul in 1973. A revised draft, Document 3B(Central Office)12, was submitted to the National Committees for approval under the Six Months'Rule in April 1974. The following countries voted explicitly in favour of publication of this Part 5: Australia Netherlands Austria Portugal Belgium Romania Denmark. South Africa (Republic of) Egypt Spain Finland Sweden France Switzerland- Germany Turkey Israel United Kingdom Italy United States of America Japan DIAGRAMS, CHARTS, TABLES Part 5: Preparation of interconnection diagrams and tables 1. Scope This standard applies to interccnnection diagrams and tables used in electrotechnology. 2. Related publications The other parts of IEC Publication 113 (see inside back cover) are concerned with matters of drawing practice and provide additional guidance. Graphical symbols for diagrams are given in the relevant parts of IEC Publication 117, Recommended Gra- phical Symbols (see inside back cover). Different methods for the designation and marking of conductors and cables are given in IEC Publication 391, Marking of Insulated Conductors. 3.Purpose of an interconnectiondiagram Interconnection diagrams and tables provide information on the external electrical connections between units of equipment. They are used as ar aid in the realization of the wiring harnesses and for maintenance purposes. Information on the internal connections in units is not normally included, but references to the appropriate circuit or wiring diagrams may be provided. The diagrams may employ single-line or multi-line representation and may be combined with or replaced by tables, providing clarity is maintained. The latter are recommended when the number