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1、UL1004ISBN1-55989-608-6ElectricMotorsThisPDFStandarddownloadedfromwww.bzfxw.comFEBRUARY7,2001−UL1004tr1UnderwritersLaboratoriesInc.(UL)333PfingstenRoadNorthbrook,IL60062-2096ULStandardforSafetyforElectricMotors,UL1004FifthEdition,DatedJune3,1994Revisions:ThisStandar
2、dcontainsrevisionsthroughandincludingFebruary7,2001.ULisintheprocessofconvertingitsStandardsforSafetytotheStandardGeneralizedMarkupLanguage(SGML),andimplementinganSGMLcompliantdocumentmanagementandpublishingsystem.SGML-aninternationalstandard(ISO8879-1986)-isadescr
3、iptivemarkuplanguagethatdescribesadocument’sstructureandpurpose,ratherthanitsphysicalappearanceonapage.SignificantbenefitsthatwillresultfromUL’suseofSGMLandthesenewsystemsincludeincreasedproductivity,reducedturnaroundtimes,anddataandinformationconsistency,reusability
4、,shareability,andportability.However,thefonts,pagination,andgeneralformattingofUL’snewelectronicpublishingsystemdifferfromthatofUL’spreviouspublishingsystem.Consequently,whenrevisionpagesareissuedforaStandardwiththenewpublishingsystem,thesedifferencesmayresultinthe
5、printingofpagesonwhichnorequirementshavebeenchanged-theseadditionalpagesresultfromrelocationoftextduetorepaginationandreformattingoftheStandardwiththenewpublishingsystem.Duetothenewpublishingsystem,repaginationhasresultedinthedeletionofpagenumbers20Cand20D.Texthasb
6、eenrelocatedtoeitherpage20Bor21.Removepages20Cand20DfromyourpapercopyoftheStandard.AnnouncementBulletin(s):ThisStandardcontainstheannouncementbulletin(s)datedNovember21,1997.TheannouncementbulletinislocatedattheendoftheStandard(aftertheadoptionbulletin(s)).Textthat
7、hasbeenchangedinanymannerismarkedwithaverticallineinthemargin.Changesinrequirementsaremarkedwithaverticallineinthemarginandarefollowedbyaneffectivedatenoteindicatingthedateofpublicationorthedateonwhichthechangedrequirementbecomeseffective.Thefollowingtableliststhef
8、utureeffectivedateswiththecorrespondingreference.FutureEffectiveDatesReferencesFebruary7,2003Paragraph18.0Thenewandrevisedrequirementsaresubstant
