81/232/DCForIECuseonly2003-07-25INTERNATIONALELECTROTECHNICALCOMMISSIONTECHNICALCOMMITTEENo.81:LIGHTNINGPROTECTIONIEC62305-3,Ed.1:Protectionagainstlightning-Part3:PhysicaldamagetostructuresandlifehazardThisdocumentisrelevanttonewmaterialsubmittedbysomeNationalCommitteesascommentsto81/214/CDandjudgedbyWG8usefultobeintegratedinthefutureCDV.NationalCommitteesareaskedtosubmittheircommentsassoonaspossibleinordertoallowWG8toexamineitbeforethenextTC81meetinginPalmadeMallorca(2003September29).CommentsshouldbesubmittedusingtheIECElectronicvoting/commentingsystembytheNationalCommittees(SeeAC/15/2001).Commentstobereturnedby2003-09-19.–2–81/232/DCAnnexE(informative)AdditionalinformationforLPSinthecaseofofstructureswithdangerofexplosion1Scope1.1Thisannexappliestothedesign,erection,extensionandmodificationoflightningprotectionsystemsforstructureswithexplosionendangeredareas.Thisannexdoesnotcontainanydataregardingthenecessityoflightningprotection.1.2ThisannexappliesonlyinconjunctionwithIEC62305-3,Ed.1.0“Protectionagainstlightning-Part3Physicaldamagestostructuresandlifehazard”.1.3Ifalightningprotectionsystemisdesignedaccordingtolightningprotectionclass2,thiscomplieswiththeusualrequirementsforexplosionendangeredareas.Exceptionstothisareallowedonlyinjustifiedexceptionalcasesorunderspecialconditions,e.g.extremeenvironmentalinfluences,climaticconditionsorlegalprovisions.Thefollowingadditionalrequirementsarebasedonlightningprotectionclass2.NOTE:Therequirementsarebasedonpracticallyprovenconfigurationsoflightningprotectionsystemsinexplosionendangeredareas.2TermsanddefinitionsForhazardousareas,thetermsanddefinitionsofIEC60079-10“Electricalapparatusforexplosivegasatmospheres–Classificationofhazardousareas“andofIEC61241-3“Electricalapparatusforuseinthepresenceofcombustibledust–Classificationofareaswherecombustibledustsareormaybepresent”applyinadditiontothetermsanddefinitionsofIEC62305-3,Ed.1.0.3GeneralIfalightningprotectionsystemiserectedinaccordancewiththisstandard,inflammables...
