UL-2238-2011

UL2238CableAssembliesandFittingsforIndustrialControlandSignalDistributionULStandardforSafetyforCableAssembliesandFittingsforIndustrialControlandSignalDistribution,UL2238SecondEdition,DatedMay4,2011SummaryofTopicsAneweditionoftheStandardforCableAssembliesandFittingsforIndustrialControlandSignalDistribution,UL2238hasbeenissuedtoreflectthelatestapprovaldateasanAmericanNationalStandardandtoincludethefollowingrevisions/additionsthatwereproposedSeptember24,2010andFebruary11,2011:•Addedrequirementsforsurgeprotectivedevices,paragraphs1.8,1.9,40.1.12,40.1.13,41.1.7,and41.1.8.•MadeaneditorialcorrectiontoExceptionNo.4in7.2.1.ThenewandrevisedrequirementsaresubstantiallyinaccordancewithProposal(s)onthissubjectdatedSeptember24,2010andFebruary11,2011.Allrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmittedinanyformbyanymeans,electronic,mechanicalphotocopying,recording,orotherwisewithoutpriorpermissionofUL.ULprovidesthisStandard″asis″withoutwarrantyofanykind,eitherexpressedorimplied,includingbutnotlimitedto,theimpliedwarrantiesofmerchantabilityorfitnessforanypurpose.InnoeventwillULbeliableforanyspecial,incidental,consequential,indirectorsimilardamages,includinglossofprofits,lostsavings,lossofdata,oranyotherdamagesarisingoutoftheuseofortheinabilitytousethisStandard,evenifULoranauthorizedULrepresentativehasbeenadvisedofthepossibilityofsuchdamage.InnoeventshallUL’sliabilityforanydamageeverexceedthepricepaidforthisStandard,regardlessoftheformoftheclaim.UsersoftheelectronicversionsofUL’sStandardsforSafetyagreetodefend,indemnify,andholdULharmlessfromandagainstanyloss,expense,liability,damage,claim,orjudgment(includingreasonableattorney’sfees)resultingfromanyerrorordeviationintroducedwhilepurchaserisstoringanelectronicStandardonthepurchaser’scomputersystem.TherequirementsinthisStandardarenowineffect,exceptforthoseparagraphs,sections,tables,figures,and/orotherelementsoftheStandardhavingfutureeffectivedatesasindicatedinthenotefollowingtheaffecteditem.ThepriortextforrequirementsthathavebeenrevisedandthathaveafutureeffectivedatearelocatedaftertheStandard,andareprecededbya″SUPERSEDEDREQUIREMENTS″notice.Thefollowingtableliststhefutureeffectivedateswiththecorrespondingreference.MAY4,2011−UL2238tr1FutureEffectiveDateReferencesFebruary13,2013SecondEditionMAY4,2011−UL2238tr2MAY4,20111UL2238StandardforCableAssembliesandFittingsforIndustrialControlandSignalDistributionFirstEdition–February,2009SecondEditionMay4,2011ThisANSI/ULStandardforSafetyconsistsoftheSecondEdition.ThemostrecentdesignationofANSI/UL2238asanAmericanNationalStandard(ANSI)occurredonMay4,2011.ANSIapprovalforastandarddoesnotincludetheCoverPage,TransmittalPages,TitlePage,oreffectivedateinformation.CommentsorproposalsforrevisionsonanypartoftheStandardmaybesubmittedtoULatanytime.ProposalsshouldbesubmittedviaaProposalRequestinUL’sOn-LineCollaborativeStandardsDevelopmentSystem(CSDS)at’sStandardsforSafetyarecopyrightedbyUL.NeitheraprintednorelectroniccopyofaStandardshouldbealteredinanyway.AllofUL’sStandardsandallcopyrights,ownerships,andrightsregardingthoseStandardsshallremainthesoleandexclusivepropertyofUL.COPYRIGHT©2011UNDERWRITERSLABORATORIESINC.ANSI/UL2238-2011MAY4,2011UL22382NoTextonThisPageCONTENTSINTRODUCTION1Scope...............................................................................52Glossary.............................................................................63References...........................................................................84Components..........................................................................85UnitsofMeasurement.................................................................8CONSTRUCTION6AccessibilityofUninsulatedLiveParts...................................................86.3Valvefittings..................................................................107InsulatingMaterials..................................................................107.1General......................................................................107.2Flammability..................................................................107.3Electricalproperties............................................................117.4Thermalproperties............................................................148LiveParts...........................................................................149GroundingandDead-MetalParts.....................................................1510Terminals..........................................................................1611StrainReliefandCordEntries.......................................................1812Spacings..........................................................................1813Assembly..........................................................................1813.1General.....................................................................1813.2Polarization..................................................................1913.3Matingandinterchangeability.