ISO INTERNATIONAL STANDARD 12374 First edition 1995-07-15 ANSI Internat Doc Sec Agricultural irrigation Wiring and equipment for electrically driven or controlled irrigation machines Irrigation agricole -- Cablage et materiel pour les machines d'irrigation entraineesoucommandéesélectriquement ISO Reference number ISO12374:1995(E) Coovriaht Intemational Oraanization for Standardization ISO12374:1995(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (lsO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for whichatechnicalcommitteehasbeenestablishedhastherighttobe represented on that committee. International organizations, governmental and non-governmental, in liaison with Iso, also take part in the work. Iso collaborates closely with the International Electrotechnical Commission (iEC)onallmattersofelectrotechnicalstandardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 12374 was prepared by Technical Committee Iso/TC 23,Tractors and machinery for agriculture and forestry.Subcom- mittee Sc 18, Irrigation and drainage equipment and systems. ?ISO1995 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Internationai Organization for Standardization CasePostale56·CH-1211Geneve20·Switzerland Printed in Switzerland ISO12374:1995(E) INTERNATIONALSTANDARD ISO Agricultural irrigation --- Wiring and equipment for electrically driven or controlled irrigation machines Scope 3Definitions This International Standard provides detailed infor- For the purposes of this International Standard, the mation for the application of electrical apparatus to following definitions apply. electrically driven or controlledagricultural irrigation machines,coveringalt electricalequipment,appar 3.1 ampacity: Allowable current-carrying capacity atus, components and wiring necessary from the of a conductor determined by the conductor diameter point of connection of electric power to the machine. and the insulation on the conductor. It applies to electrical equipment for use on circuits operating at voltages from 30 V to 600 V. NOTE1 The conductors can carry more than the allow- able current;however,the allowable currentis setto pre- The purpose of this International Standard is to im- vent overheating and damage to insulation or equipment. provethedegreeofpersonalsafetyinoperationand application of products and materials under a reason- 3.2 auxiliary conductor: Conductor that carries able range of conditions. current to a device which is not necessary for move- ment of the machine. 2Normative references 3.3 auxiliary panel: Enclosure containing auxiliary The following standards contain provisions which control devices for the machine such as motor con- through reference in this text, constitute provisions troilers, relays, switches and transformers, but not of this International Standard. At the time of publi- including the main controller and other main control cation, the editions indicated were valid. All standards devices that supply power to the entire machine. are subject to revision,and parties to agreements based on this International Standard are encouraged NOTE 2A junction box is not an auxiliary panel. to investigate the possibility of applying the most re- cent editions of the standards indicated below. 3.4 bonded connection: Reliable connection to en- Members of IEC and ISO maintain registers of cur- sure the necessary electrical conductivity between rently valid