IEC_60092-502-1999.pdf

INTERNATIONALSTANDARDIEC60092-502Fifth edition1999-02Electrical installations in ships Part 502:Tankers Special featuresInstallations lectriques bord des navires Partie 502:Navires-citernes Caractristiques spcialesReference numberIEC 60092-502:1999(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.NumberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.Consolidated publicationsConsolidated versions of some IEC publications including amendments areavailable.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to thebase publication,the base publication incorporating amendment 1 and the basepublication incorporating amendments 1 and 2.Validity of this publicationThe technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating to the date of the reconfirmation of the publication is availablein the IEC catalogue.Information on the subjects under consideration and work in progress undertaken bythe technical committee which has prepared this publication,as well as the list ofpublications issued,is to be found at the following IEC sources:IEC web site*Catalogue of IEC publicationsPublished yearly with regular updates(On-line catalogue)*IEC BulletinAvailable both at the IEC web site*and as a printed periodicalTerminology,graphical and letter symbolsFor general terminology,readers are referred to IEC 60050:International Electro-technical Vocabulary(IEV).For graphical symbols,and letter symbols and signs approved by the IEC forgeneral use,readers are referred to publications IEC 60027:Letter symbols to beused in electrical technology,IEC 60417:Graphical symbols for use on equipment.Index,survey and compilation of the single sheets and IEC 60617:Graphical symbolsfor diagrams.*See web site address on title page.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONALSTANDARDIEC60092-502Fifth edition1999-02Electrical installations in ships Part 502:Tankers Special featuresInstallations lectriques bord des navires Partie 502:Navires-citernes Caractristiques spcialesPRICE CODE IEC 1999 Copyright-all rights reservedNo part of this publication may be reproduced or utilized in any form or by any means,electronic ormechanical,including photocopying and microfilm,without permission in writing from the publisher.International Electrotechnical Commission3,rue de Varemb Geneva,SwitzerlandTelefax:+41 22 919 0300e-mail:inmailiec.ch IEC web site http:/www.iec.chXFor price,see current catalogue Commission Electrotechnique Internationale International Electrotechnical CommissionLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 60092-502 IEC:1999(E)CONTENTSPageFOREWORD.4INTRODUCTION.5Clause1 Scope.62 Normative references.63 Definitions.74 Area classification.114.1 General.114.2 Tankers carrying flammable liquids other than liquefied gases havinga flashpoint not exceeding 60 C,for example crude oil,oil products,chemical products.154.3 Tankers carrying flammable liquids having a flashpoint exceeding 60 C.174.4 Tankers carrying flammable liquefied gases.174.5 Tankers carrying cargoes(for example acids)reacting with otherproducts/materials to evolve flammable gases.185 Electrical systems.185.1 Sources of electrical power.185.2 Distribution systems.185.3 Electrical protection.185.4 Equipotential bonding.195.5 Static electricity.195.6 Lightning protection.205.7 Cathodically protected metallic parts.205.8 Electromagnetic radiation.206 Electrical equipment.206.1 General.206.2 Selection of electrical equipment.206.3 Certified safe type equipment.226.4 Electrical equipment of the type“n”and that which ensures the absenceof sparks and arcs and of“hot spots”during its normal operation.226.5 Electrical equipment in hazardous areas.236.6 Movable equipment.247 Installation.247.1 General.247.2 Selection of apparatus.257.3 Wiring system general.257.4 Cable wiring systems.25LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.60092-502 IEC:1999(E)3 7.5 Connection of cables.257.6 Cable joints.258 Ventilation and pressurisation.268.1 General.268.2 Design principles.278.3 Ventilation related to area classification.278.4 Protection by over-pressure.279 Inspection and maintenance.299.1 General.299.2 Inspection and testing.299.3 Isolation of apparatus.299.4 Maintenance.299.5 Qualifications of personnel.2910 Documentation.2910.1 Area classification.2910.2 Equipment.3010.3 Installation.3110.4 Maintenance.3210.5 Administration of the documentation.32AnnexesA(informative)Examples of hazardous area classification Basic principles.33B(informative)Examples of hazardous area classification Tankers carrying flammableliquids other than liquefied gases having a fl