IEC_60079-15_Electrical_Apparatus_For_Explosive_Gas.pdf

INTERNATIONALSTANDARDIEC60079-15Second edition2001-02Electrical apparatus for explosive gasatmospheres Part 15:Type of protection nMatriel lectrique pour atmosphres explosives gazeuses Partie 15:Mode de protection nReference numberIEC 60079-15:2001(E)Copyright International Electrotechnical Commission Provided by IHS under license with IECDocument provided by IHS Licensee=Fluor Corp no FPPPV per administrator/usenew u/2110503106,03/05/2004 00:48:06 MST Questions or comments about thismessage:please call the Document Policy Group at 303-397-2295.-,-,-Publication numberingAs from 1 January 1997 all IEC publications are issued with a designation in the60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editionsThe IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,thebase publication incorporating amendment 1 and the base publication incorporatingamendments 1 and 2.Further information on IEC publicationsThe technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating tothis publication,including its validity,is available in the IEC Catalogue ofpublications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertakenby the technical committee which has prepared this publication,as well as the listof publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publicationsThe on-line catalogue on the IEC web site(www.iec.ch/catlg-e.htm)enablesyou to search by a variety of criteria including text searches,technicalcommittees and date of publication.On-line information is also available onrecently issued publications,withdrawn and replaced publications,as well ascorrigenda.IEC Just PublishedThis summary of recently issued publications(www.iec.ch/JP.htm)is alsoavailable by email.Please contact the Customer Service Centre(see below)forfurther information.Customer Service CentreIf you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.chTel:+41 22 919 02 11Fax:+41 22 919 03 00Copyright International Electrotechnical Commission Provided by IHS under license with IECDocument provided by IHS Licensee=Fluor Corp no FPPPV per administrator/usenew u/2110503106,03/05/2004 00:48:06 MST Questions or comments about thismessage:please call the Document Policy Group at 303-397-2295.-,-,-INTERNATIONALSTANDARDIEC60079-15Second edition2001-02Electrical apparatus for explosive gasatmospheres Part 15:Type of protection nMatriel lectrique pour atmosphres explosives gazeuses Partie 15:Mode de protection nPRICE CODE IEC 2001 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.chWFor price,see current catalogue Commission Electrotechnique Internationale International Electrotechnical CommissionCopyright International Electrotechnical Commission Provided by IHS under license with IECDocument provided by IHS Licensee=Fluor Corp no FPPPV per administrator/usenew u/2110503106,03/05/2004 00:48:06 MST Questions or comments about thismessage:please call the Document Policy Group at 303-397-2295.-,-,-2 60079-15 IEC:2001(E)CONTENTSPageFOREWORD.7Clause1Scope.82Normative references.83Definitions.104General.174.1Potential ignition sources.174.2Apparatus grouping.174.3Temperatures.174.3.1Maximum surface temperature.174.3.2Ambient temperatures.174.3.3Surface temperature and ignition temperature.174.4Electrical apparatus.174.5Ex components.184.6Other requirements.185Construction.185.1Degree of protection.185.2Mechanical strength.195.3Guards for light transmitting parts.195.4Circulating currents.195.5Non-metallic enclosures,non-metallic parts of enclosures.196Connection facilities and wiring.206.1General.206.2Connection for external conductors.207Clearances,creepage distances and separations.238Electric strength.308.1Insulation from earth or frame.308.2Insulation between conductive parts.309Supplementary requirements for non-sparking rotating machines.319.1General.319.2Degree of protection.319.2.1Machine enclosure.319.2.2Terminal boxes.319.2.3Conduit stopping boxes,cable sealing and dividing boxes.319.3Connection facilities for external conductors.319.4Neutral point connections.319.5Radial air gap.329.6Ventilation systems.329.6.1General.329.6.2Ventilation openings for external fans.339.6.3Construction and mounting of the ventilation system.339.6.4Clearances for the ventilation system.339.6.5Materials for fans and fanhoo