UL 2018 proposal20100208

UL 2018 proposal20100208

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时间:2021-11-26

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1、DocumentWasDownloadedByDEBBIETAMForUseByNEONLITEELECTRONIC&LIGHTING(HK)LTD10964:3/25/2010-2:56AMSubject2108February8,2010SUMMARYOFTOPICSThefollowingchangesinrequirementstotheStandardforLowVoltageLightingSystems,UL2108,arebeingproposedforpreliminaryreviewandcommentonly:1.For

2、PreliminaryReviewOnly:Reviseparagraph14.1toincludegalvanizedsteelasacurrent-carryingpartwhenlocatedinaClass2circuitCOMMENTSDUE:February22,2010Thisproposalisforreviewandcommentonly(noballotatthistime).Pleasenotethatcommentsonapreliminaryreviewdocumentwillnotreceivearesponsefromthepr

3、oposalauthorthroughCSDS.Instead,theproposalauthorwillbeaskedtoreviewthecommentsandadjusttheproposalsand/orsupportingrationaleastheauthordeterminestobeappropriate.Thepreliminaryreviewprocessisaninformalmechanismthatprovidesauthorswiththeopportunitytorefinetheirproposalsbeforetheyadva

4、ncetothenextstageinUL’sstandardsdevelopmentprocess.Insomecases,theauthoroftheproposalsmaychoosetodiscontinuethem.Inthiscase,theauthorneednotdoanythingafterpreliminaryreviewhasended.Normally,thenextstepintheprocessisthemoreformalSTPballotandstakeholderreviewprocess.Onlycommentsposte

5、dduringtheSTPballotandstakeholderreviewprocesswillbeprovidedwitharesponseinCSDS.Foryourconvenienceinreview,proposedadditionstoexistingrequirementsareshownunderlinedandproposeddeletionsareshownlined-out.1.ForPreliminaryReviewOnly:Reviseparagraph14.1toincludegalvanizedsteelasacurrent

6、-carryingpartwhenlocatedinaClass2circuitRATIONALEProposalsubmittedby:TomTritto,LightingComplianceSolutions,Inc.InthedisplayindustrymanufacturersarenowincorporatinglowvoltageLEDlightingtechnologytoilluminatetheirshelvingdisplays.Certaindesignsusingconductorsasshelvingsupportsrequire

7、themechanicalstrengthofgalvanizedsteelinlieuofcopperandaluminum.ThisproposalisbasedonthefactthatthegalvanizedconductorwouldonlybeacceptablewhenusedforexposedbareconductorsontheoutputofalowvoltageClass2supply.ThelimitedoutputenergyandcurrentoftheClass2supplyminimizestheriskoffireands

8、hockhazardandeliminatestheconcernfo

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