C.D.U./U.D.C.: 621.3.012.001.11.001.33:744.4:083/084.001.11.001.33 COMMISSION ELECTROTECHNIOUE INTERNATIONALE (affiliee a 'Organisation internationale de Normalisation -ISO) RECOMMANDATION DE LA CEI INTERNATIONAL ELECTROTECHNICAL COMMISSION (affiliated to the International Organization for Standardization -is) IECRECOMMENDATION Publication 113-1 Deuxieme édition - Second edition 1971 Schemas, diagrammes, tableaux Premiere partie: Definitions et classification Diagrams, charts, tables Part 1: Definitions and classification Droits de reproduction reserves - Copyright - all rights reserved Aucune partie de cette publication ne peutetre reproduite ni utilisee sous quel- No part of this publication may be reproduced or utilized in any form or que forme que ce soitet par aucun procede, blectronique ou mecaniquey by any means, electronic or mechanical, including photocopying and compris la photocopie et les microfilms, sans I'accord ecrit de I'editeur. microfilm,without permission in writing from the publisher Bureau Central de la Commission Electrotechnique Internationale 1, rue de Varembé Geneve, Suisse IEC Prix Fr. s. 12.- VOL .10 Price S. Fr. CONTENTS Page FOREWORD 5 PREFACE 5 SECTIONONE-GENERAL Clause Scope Definitions CLASSIFICATION ACCORDING TO PURPOSE SECTION TWO 3. Explanatory diagrams 4. Explanatory charts or tables 6 Wiring diagrams or wiring tables 5. 9 6. Location diagrams or tables 11 SECTION THREE CLASSIFICATION ACCORDING TO METHOD OF REPRESENTATION 7. Number of conductors 11 Arrangement of symbols 11 Topographical representation 13 9. INTERNATIONALELECTROTECHNICALCOMMISSION DIAGRAMS, CHARTS, TABLES Part 1: Definitions and classification 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 this international unification, the IEC expresses the wish that all National Committees having as yetnonational rules,whenpreparing suchrules,should usetheIEC recommendations as thefundamental basisfor these rules in so far as national conditions will permit. 4) The desirability is recognized of extending international agreement on these matters through an endeavour to harmonize national standardizationruleswiththeserecommendations in sofarasnationalconditionswill permit. The National Committees pledge their infiuence towards that end. PREFACE This Recommendation has been prepared by IEC Technical Committee No. 3, Graphical Symbols. Technical Committee No. 3 has established a great number of Recommendations containing graphical symbols for use on diagrams in the field of electrotechnology (see IEC Publication 117, Recommended Graphical Symbols). Afterhaving covered most of the needs for graphical symbols, with the exception of those for new fields of electrotechnology still under consideration, Technical Committee No. 3found it advisable to supplement the symbol publications with Recommendations for the preparation of diagrams. These Recommendations will include: definitions and classification of diagrams, charts and tables; guiding principles for use and combination of graphical symbols; guiding principles for preparation of diagrams; guiding principles for supplementing or replacing diagrams by charts and tables; item designation, etc. These Recommendations wil be published separately under the general heading of I E C Publication 113, Diagrams, Charts, Tables.This Publication forms Part 1 of this series.It is a revision of Publication 113 (1959), the following modifications havingbeenmade: 1)Tableswill infuturereplacediagramsandchartstoan increasingextent.Theyhavethereforebeengivenmoreemphasis in the text and are mentioned in the title. 2) So