ANSI IEEE C37.24-1986 IEEE Guide for Evaluating th

iANSI/IEEEC37.24-1986(RevisionofANSI/IEEEC37.24-1971)IEEEGuideforEvaluatingtheEffectofSolarRadiationonOutdoorMetal-EnclosedSwitchgearSponsorSwitchgearCommitteeoftheIEEEPowerEngineeringSocietyApprovedSeptember18,1986ReaffirmedDecember5,1991IEEEStandardsBoardApprovedOctober21,1988ReaffirmedMay20,1992AmericanNationalStandardsInstitute©Copyright1988byTheInstituteofElectricalandElectronicsEngineers,Inc345East47thStreet,NewYork,NY10017,USANopartofthispublicationmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.iiIEEEStandardsdocumentsaredevelopedwithintheTechnicalCommitteesoftheIEEESocietiesandtheStandardsCoordinatingCommitteesoftheIEEEStandardsBoard.Membersofthecommitteesservevoluntarilyandwithoutcompensation.TheyarenotnecessarilymembersoftheInstitute.ThestandardsdevelopedwithinIEEErepresentaconsensusofthebroadexpertiseonthesubjectwithintheInstituteaswellasthoseactivitiesoutsideofIEEEwhichhaveexpressedaninterestinparticipatinginthedevelopmentofthestandard.UseofanIEEEStandardiswhollyvoluntary.TheexistenceofanIEEEStandarddoesnotimplythattherearenootherwaystoproduce,test,measure,purchase,market,orprovideothergoodsandservicesrelatedtothescopeoftheIEEEStandard.Furthermore,theviewpointexpressedatthetimeastandardisapprovedandissuedissubjecttochangebroughtaboutthroughdevelopmentsinthestateoftheartandcommentsreceivedfromusersofthestandard.EveryIEEEStandardissubjectedtoreviewatleastonceeveryfiveyearsforrevisionorreaffirmation.Whenadocumentismorethanfiveyearsold,andhasnotbeenreaffirmed,itisreasonabletoconcludethatitscontents,althoughstillofsomevalue,donotwhollyreflectthepresentstateoftheart.UsersarecautionedtochecktodeterminethattheyhavethelatesteditionofanyIEEEStandard.CommentsforrevisionofIEEEStandardsarewelcomefromanyinterestedparty,regardlessofmembershipaffiliationwithIEEE.Suggestionsforchangesindocumentsshouldbeintheformofaproposedchangeoftext,togetherwithappropriatesupportingcomments.Interpretations:Occasionallyquestionsmayariseregardingthemeaningofportionsofstandardsastheyrelatetospecificapplications.WhentheneedforinterpretationsisbroughttotheattentionofIEEE,theInstitutewillinitiateactiontoprepareappropriateresponses.SinceIEEEStandardsrepresentaconsensusofallconcernedinterests,itisimportanttoensurethatanyinterpretationhasalsoreceivedtheconcurrenceofabalanceofinterests.ForthisreasonIEEEandthemembersofitstechnicalcommitteesarenotabletoprovideaninstantresponsetointerpretationrequestsexceptinthosecaseswherethematterhaspreviouslyreceivedformalconsideration.Commentsonstandardsandrequestsforinterpretationsshouldbeaddressedto:Secretary,IEEEStandardsBoard345East47thStreetNewYork,NY10017USAIEEEStandardsdocumentsareadoptedbytheInstituteofElectricalandElectronicsEngineerswithoutregardtowhethertheiradoptionmayinvolvepatentsonarticles,materials,orprocesses.Suchadoptiondoesnotassumeanyliabilitytoanypatentowner,nordoesitassumeanyobligationwhatevertopartiesadoptingthestandardsdocuments.iiiForeword(ThisForewordisnotapartofDraftANSI/IEEEC37.24-1986,IEEEGuideforEvaluatingtheEffectofSolarRadiationonOutdoorMetal-EnclosedSwitchgear.)ThisguideoriginatedasatechnicalpaperattheAIEEWintergeneralmeetinginNewYork,NY,Jan18–22,1954.InOctober1955,itwasissuedbyAIEEStandardsCommitteeasPublication955.Subsequentdocumentrevisionin1962includeda3000AratingsandupdatingofthetemperaturedatafromtheNationalOceanicandAtmosphericAdministration.Thisrevisionoftheguidereflectsthereferencestothenewstandards,ANSI/IEEEC37.20.1-1987,C37.20.2-1987,andC37.20.3-1987aswellasthemostrecentmonthlynormalmaximumtemperaturesoftheUnitedStates;andCanada(1951–1980).Anewsection,7,hasbeenwrittenthatdiscussescolorandfinishofthemetal-enclosedswitchgearandtheirimpactontemperatureduetosolarradiation.TherevisiononthisdocumentwaspreparedbyaworkinggroupwithintheSwitchgearAssembliesSubcommitteeoftheSwitchgearCommitteeofthePowerEngineeringSocietyofIEEE.MembersoftheworkinggroupoftheIEEESwitchgearAssembliesSubcommitteethatpreparedthisguidewereasfollows:A.J.Kalvaitis,ChairS.P.AxeA.P.HaggertyJ.JarabekR.H.LeeJ.McCormickJ.RuleR.L.SimpsonS.H.TelanderJ.E.ThomasThepersonneloftheIEEESwitchgearAssembliesSubcommitteewhoreviewedandapprovedthisstandardwere:C.G.Burland,ChairA.AlsakerJ.ArdenS.C.AtkinsonR.N.CarsonJ.J.DravisF.C.FarrellL.WGaussaM.J.JoannouA.J.KalvaitisW.E.LaubachG.R.NourseG.O.PerkinsJ.RuleJ.C.ScottJ.F.SellersS.D.SmithE.M.SpencerS.H.TelanderJ.E.ThomasThefollowingpersonswereontheballotingcommitteethatapprovedthisdocumentforsubmissiontotheIEEEStandardsBoard:A.K.AlsakerH.W.AnderlJ.G.AngelisR.H.ArndtS.C.AtkinsonL.E.BrothersF.L.CameronR.L.CapraS.L.CarterL.V.ChabalaA.P.ColaiacoJ.A.DeniG.W.DolloffJ.J.DravisC.J.DvorakP.W.DwyerF.C.FarrellJ.D.FinleyGuyGenestK.I.GrayG.R.HanksW.E.HarperK.D.HendrixW.F.HoenigmannW.C.HueningA.J.KalvaitisP.L.KolarikD.G.KumberaS.R.LambertD.M.LarsonW.E.LaubachT.S.LauberJ.G.LeachG.N.LesterE.L.LuehringP.C.LyonsivJ.A.ManeatisJ.R.MarekC.MayoL.V.McCallR.A.McMasterH.W.MikuleckyD.C.MillsA.F.ParksG.O.PerkinsC.A.PopeckJ.C.W.Ra