UL 1604-1994(R2004)|江阴雨辰互联

2023年6月26日发(作者：)

UL1604ISBN1-55989-610-8ElectricalEquipmentforUseinClassIandII,Division2,andClassIIIHazardous(Classiﬁed)LocationsCopyright Underwriters Laboratories Inc.

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No reproduction or networking permitted without license from IHSNot for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--FEBRUARY3,2004−UL1604tr1UnderwritersLaboratoriesInc.(UL)333PﬁngstenRoadNorthbrook,IL60062-2096ULStandardforSafetyforElectricalEquipmentforUseinClassIandII,Division2,andClassIIIHazardous(Classiﬁed)Locations,UL1604ThirdEdition,DatedApril28,1994Revisions:ThisStandardcontainsrevisionsthroughandincludingFebruary3,yofTopicdardsforSafetyaredevelopedandmaintainedintheStandardGeneralizedMarkupLanguage(SGML).SGML--aninternationalstandard(ISO8879-1986)--isadescriptivemarkuplanguagethatdescribesadocument’sstructureandpurpose,ormattingdifferencesresultingfromtheuseofUL’snewelectronicpublishingsystem,pleasenotethatadditionalpages(onwhichnorequirementshavebeenchanged)maybeincludedinrevisiosinrequirementsaremarkedwithaverticallineinthemarginandarefollowedbyaneffectivedatenoteindicatingthedateofpisionsdatedFebruary3,2004includeareprintedtitlepage(page1)terforthisStandardatUL’sNorthbrookOfficeistheofficialdocumentinsofarasitrelatestoaULserviceandthecomplianceofaproductwithrespecttotherequirementsforthatproductandservice,oriftherearequestionsregardingtheaccuracyofthisStandard.--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---UL’raprintedcopyofaStandard,northedistributiondisketteforaStandard-on-DisketteandtheﬁlL’sStandardsandallcopyrights,ownerships,andrightsreofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmittedinanyformbyanymeans,electronic,mechanicalphotocopying,recording,ndardforSafidesthisStandard″asis″withoutwarrantyofanykind,eitherexpressedorimplied,includingbutnotlimitedto,theimpliedwarrantiesofmerchantabilityorﬁentwillULbeliableforanyspecial,incidental,consequential,indirectorsimilardamages,includinglossofproﬁts,lostsavings,lossofdata,oranyotherdamagesarisingoutoftheuseofortheinabilitytousethisStandard,evenifULoranauthoentshallUL’sliabilityforanydamageeverexceedthepricepaidforthisStandard,ght Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDTtr2FEBRUARY3,2004−UL1604ULwillattempttor,thissupportserviceisofferedonareasonableeffortsbasisonly,ortstheelectronicversionsofitsStandardsonlyiftheya’ssupportpoliciesmaychangefromtime-to-timewithoutnotiﬁrvestherighttochangetheformat,presentation,ﬁletypesandformats,deliverymethodsandformats,andsersoftheelectronicversionsofUL’sStandardsforSafetyagreetodefend,indemnify,andholdULharmlessfromandagainstanyloss,expense,liability,damage,claim,orjudgement(includingreasonableattorney’sfees)resultingfromanyerrorordeviationintroducedwhilepurchaserisstoringanelectronicStandardonthepurchaser’gle-userversionelectronicStandardwaspurchased,onecopyofthisStandardmaybestoredontheharddiskofasinglepersonalcomputer,oronasingleLANﬁle-serverorthepermanentstoragedeviceofamultiple-usercomputerinsuchamannerthatthisStandardmayonlybeaccessedbyoneuseratiple-userversionelectronicStandardwaspurchased,onecopyoftheStandardmaybestoredonasingleLANﬁle-server,oronthepermanentstoragedeviceofamultiple-usercomputer,onicStandardsareintendedforon-lineuse,suchasforviewingtherequirementsofaStandard,conductingawordsearch,ecopyoftheStandecopyoftheStandardmaybeprintedforeofdifferencesinthecomputer/software/printersetupusedbyULandthoseofelectronicStandardspurchasers,theprintedcopyobtainedbyapurchasoyeeofanorganizationpurchasingaULStandardcanmakeacopyofthepageorpagesbeingviewedfortheirownfairand/uirementsinthisStandardarenowineffect,exceptforthoseparagraphs,sections,tables,ﬁgures,and/orotherelementsoftheStandardhavingfortextforrequirementsthathavebeenrevisedandthathaveafutureeffectivedatearelocatedaftertheStandard,andareprecededbya″SUPERSEDEDREQUIREMENTS″ductsubmittalsmadepriortoaspeciﬁedfutureeffectivedatewillbejudgedunderalloftherequirementsinthisStandardincludingthoserequirementswithaspeciﬁedfutureeffectivedate,unlesstheapplicantspeciﬁr,iftheapplicantelectsthisoption,itshouldbenotedthatcompliancewithalltherequirementsinthisStandardwillberequiredasaconditionofcontinuedListing,Recognition,andFollow-UpServicesaftertheeffectivedate,andunderstandingofthisshouldbesigniﬁght©2004UnderwritersLaboratoriesInc.--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDTFEBRUARY3,2004−UL1604tr....October6,Date2995551995Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDTtr4FEBRUARY3,2004−UL1604NoTextonThisPageCopyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--APRIL28,1994(TitlePageReprinted:February3,2004)1UL1604StandardforElectricalEquipmentForUseInClassIandII,Division2,AndClassIIIHazardous(Classiﬁed)LocationsTheFirstEditionwastitledElectricalEquipmentForUseInHazardousLocationsClassIAndClassII,Division2,AndClassIII,Divisions1And2Figures6.1–6.4,6.7,and6.8arefromBritishApprovalsServiceforElectricalEquipmentinFlammableAtmospheresCertiﬁcationStandardSFA3012:1972–s6.5and6.6arefrom″SomeAspectsoftheDesignofIntrinsicallySafeCircuits,″ton,SafetyinMinesResearchEstablishment,Sheffield,England,dition–November,1982SecondEdition–May,1988ThirdEditionApril28,1994AneffectivedateincludedasanoteimmediatelyfollowingconsofthisStandardwilndardiscurrentonlyifitincorporatesthemostrecentlyadoptedrevisions,allofwhichareitemizedonthetr1-55989-610-8COPYRIGHT©1982,ght Underwriters Laboratories Inc.

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No reproduction or networking permitted without license from IHSNot for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--2UL1604FEBRUARY3,2004NoTextonThisPage--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 .73AClassI,83A.1ClassI,83A.2ClassI,83A.3ClassI,8CONSTRUCTION,.9CONSTRUCTION,CLASSII,DIVISION2,.2110.4Veriﬁ.25Copyright Underwriters Laboratories Inc.

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No reproduction or networking permitted without license from IHSNot for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--4UL1604APRIL28,andardcontainsbasicrequirementsforproductscoveredbyUnderwritersLaboratoriesInc.(UL)underitsFollow-UpServiceforthiscategorywequirementsarebaseduponsoundengineeringprinciples,research,recordsoftestsandﬁeldexperience,andanappreciationoftheproblemsofmanufacture,installation,andusederivedfromconsultationwithandinformationobtainedfrommanufacturers,users,inspectionauthorities,esubjecttorevisionaervanceoftherequirementsofthisStandardbyamanufacturerisoneoftheconditionsofthecontinuedcoverageofthemanufacturer’ctwhichcomplieswiththetextofthisStandardwillnotnecessarilybejudgedtocomplywiththeStandardif,whenexaminedandtested,itisfoundtohaveotherfeactemployingmaterialsorhavingformsofconstructionwhichconﬂictwithspeciﬁctemployingmaterialsorhavingformsofconstructionnotaddressedbythisStandardmaybeexaminedandtestedaccordingtotheintentoftherequirementsand,iffoundtomeettheintentofthisStandard,,inperformingitsfunctionsinaccordancewithitsobjectives,doesnotassumeorundertnionsandﬁndingsofULrepresentitsprofessionaljudgmentgivenwithdueconsiderationtothenecessarylimitationsofprlnotberlnotincuranyobligationorliabilityfordamages,includingconsequentialdamages,arisingoutoforinconnectionwiththeuse,interpretationof,stsrequiredbytheStandardsofULareinherentlyhazardousandadequatesafegught Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDTOCTOBER6,1995UL16045INTRODUCTION1Scope1.1Theserequirementsapplytoequipment,circuits,orcomponentsintendedforuseinClassI,GroupsA,B,C,andD,Division2,hazardous(classiﬁed)locations;ClassII,GroupsFandG,Division2,hazardous(classiﬁed)locations;andClassIII,Divisions1and2,hazardous(classiﬁed)locationsasdeﬁnedinArticle500oftheNationalElectricalCode,NFPA70.1.2TheequipmentshallbecapableofbeinginstalledinaccordancewiththerequirementsintheNationalElectricalCode,ion:Battery-poweredportableequipmentneednotcomplywiththisrequirement1.3TherequirementscoverClassI,Division2electricalequipment,orpartsofsuchequipment,inwhichthecircuitsandcomponentsunderintendedoperatingconditionsareincapableofcausingignitionofthespeciﬁedﬂammablegas-orvapor-airmixture.1.4TheserequirementscoverClassII,Division2,andClassIII,Division1andDivision2equipmentthatisconstructedtoreduceorexcludetheentranceofdust.1.5Theserequirementsapplyonlytoequipmentforuseunderthefollowingatmosphericconditions.a)Anambienttemperatureof5to40°C(41to104°F),b)Anoxygenconcentrationnotgreaterthan21percent,andc)Anominalbarometricpressureofoneatmosphere.1.6Theserequirementscoverportablebattery-poweredequipment,otherthanﬂashlightsandlanterns,forClassIandClassII,Division2,andClassIII,Divisions1and2hazardous(classiﬁed)locations.1.6.1Theserequirementsalsocoverequipment,circuits,orcomponentsintendedforinstallationanduseinClassI,Zone2,GroupsIIA,IIB,andIIChazardous(classiﬁed)locations.1.6.1addedOctober6,19951.7TheserequirementsdonotcoverelectriclightingﬁxturesforuseinDivision2hazardous(classiﬁed)locationswhicharecoveredintheStandardforElectricLightingFixturesforUseinHazardous(Classiﬁed)Locations,UL844.1.8Theserequirementsdonotcoverelectricmotors,electricheaters,heattracingcablesandsimilarheat-producingdevices,orequipmentwithcathoderaytubes,oductsarecoveredunderseparaterequirements.1.9Theserequirementsdonotcoverexplosion-proof,dust-ignition-proof,orintrinsicathodsofght Underwriters Laboratories Inc.

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No reproduction or networking permitted without license from IHSNot for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--6UL1604OCTOBER6,19951.10Aproductthatcontainsfeatures,characteristics,components,materials,orsystemsnewordifferentfromthosecoveredbytherequirementsinthisstandard,andthatinvolvesariskofﬁreorofelectricshockorinjurytopersonsshallbeevaluatedusingappropriateadditionalcomponentandend-productrequirementstomaintaintctwhosefeatures,characteristics,components,materials,orsystemsconﬂictwithspeciﬁcrequonofrequirementsshallbeproposedandadoptedinconformancewiththemethodsemployedfordevelopment,revision,andimplementationofthisstandard.1.10revisedSeptember28,19952Glossary2.1Forthepurposeofthisstandardthefollowingdeﬁnitionsapply.2.2HERMETICALLYSEALEDCOMPONENT–Acomponentthatissealedagainstentranceofanexternalatmosphereandinwhichthesealismadebyfusion,suchassoldering,brazing,welding,orthefusionofglasstometal.2.3INTENDEDOPERATINGCONDITIONS–Equipmentoperationthatconformselectricallyandmechanicallywiththemanufacturer’sspeciﬁcationsandthatisusedwithinthelimitsspeciﬁcludes:a)Supplyvoltageandfrequency;b)Environmentalconditions–includingprocesstemperature;c)Tolerancesassociatedwiththecomponentsoftheequipment;d)Alltool-removableparts,suchascovers,inplace;e)Alloperator-accessibleadjustmentsatanypossiblesetting;andf)Opening,shorting,orgroundingofanonincendiveﬁeldcircuit.2.4MAINTENANCE,OPERATIONAL–Anymaintenanceactivity,otherthancorrectivemaintenance,intendedtobeperformedbytheoperatorativitiesincludethecorrectingofzeroonapanelinstrument,changingcharts,markingrecords,addingink,orthelike.2.5MAKE/BREAKCOMPONENT–Acomponenthavingmechanicalcontactstesofmake/breakcomponentsarerelays,circuitbreakers,servopotentiometers,adjustableresistors,switches,connectors,andmotorbrushes.2.6NONINCENDIVECIRCUIT–Acircuitinwhichanyarcorthermaleffectproducedunderintendedoperatingconditionsoftheequipmentisnotcapable,underthetestconditionsspeciﬁed,ofignitingthespeciﬁedﬂammablegas-orvapor-airmixture.--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDTOCTOBER6,1995UL16046A2.7NONINCENDIVECOMPONENT–Acomponenthavingcontactsformakingorbreakinganincendivecircuitandthecontactingmechanismisconstructedsothatthecomponentisnotcapableofignitingthespeciﬁedﬂsingofanonincendivecomponentisnotintendedto:a)Excludetheﬂammableatmosphere,orb)Containanexplosion.2.8NONINCENDIVEFIELDCIRCUIT–Acircuitthatentersorleavestheequipmentenclosureandthatunderintendedoperatingconditionsisnotcapable,underthetestconditionsspeciﬁed,ofignitingthespeciﬁedﬂammablegas-orvapor-airmixtureorcombustibledust.--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT6BUL1604OCTOBER6,1995NoTextonThisPageCopyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--SEPTEMBER28,1995--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---UL160472.9OPERATOR-ACCESSIBLEPART–Apartthatisintendedforadjustment,switching,orreplacementbytheoperatorduringintendeduseoroperationalmaintenance,orapartthatisreadilyaccessibletotheoperatorwithtool-removablecoversinplace.2.10SEALEDDEVICE–Adevicethatisconstructedsothatitcannotbeopened,hasnoexternaloperatingmechanisms,andisseaicemaycontainarcingpartsorinternalhotsurfaces.2.10addedSeptember28,19953General3.1General3.1.1Unlessmodiﬁedbytherequirementsinthisstandard,theequipmion:Portablebattery-poweredequipmentneednotcomplywiththerequirementsforordinarylocationequipmentifintroductionofasinglefaultdoesnotcauseignitionoftheﬂammablegasorcombustibledustundertestconditionsspeciﬁedinNonincendiveCircuits,Section6,orintroduceotherriskofexplosion.3.2Undatedreferences3.2.1Anyundatedreferencetoacodeorstandardappearingintherequirementsofthisstandardshalinparenthesesareexplanatoryorapproximateinformation.3.4Components3.4.1Exceptasindicatedin3.4.2,acomponentofaproductcoveredbythisstandardshallcomplywiththerequirementsforthatcomponent.3.4.2Acomponentisnotrequiredtocomplywithaspeciﬁcrequirementthat:a)Involvesafeatureorcharacteristicnotrequiredintheapplicationofthecomponentintheproductcoveredbythisstandard,orb)Issupersededbyarequirementinthisstandard.3.4.3Acomponentshallbeusedinaccordancewithitsratingestablishedfortheintendedconditionsofuse.3.4.4Speciﬁccomponentsareincompmponentsareintendedforuseonlyunderlimitedconditions,suchascertaintemperaturesnotexceedingspeciﬁedlimits,andshallbeusedonlyunderthosespeciﬁght Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT8UL1604OCTOBER6,19953AClassI,Zone2,andGroupEquivalency3A.1ClassI,Zone2,GroupIIA3A.1.1Equipment,circuits,orcomponentsintendedtobemarkedinaccordancewith16.1.1shallcomplywithalltherequirementsforequipment,circuits,andcomponentsforuseinClassI,Division2,GroupDhazardous(classiﬁed)locations.3A.1.1addedOctober6,19953A.2ClassI,Zone2,GroupIIB3A.2.1Equipment,circuits,orcomponentsintendedtobemarkedinaccordancewith16.1.2shallcomplywithalltherequirementsforequipment,circuits,orcomponentsforuseinClassI,Division2,GroupChazardous(classiﬁed)locations.3A.2.1addedOctober6,19953A.3ClassI,Zone2,GroupIIC3A.3.1Equipment,circuits,orcomponentsintendedtobemarkedinaccordancewith16.1.3shallcomplywithalltherequirementsforequipment,circuits,orcomponentsforuseinbothClassI,Division2,GroupAandClassI,Division2,GroupBhazardous(classiﬁed)locations.3A.3.1addedOctober6,1995CONSTRUCTION,CLASSI,DIVISION2EQUIPMENT4General4.1ClassI,Division2equipmentunderintendedoperatingconditionsshallnotbecapableofignitingthespeciﬁedﬂammablegas-orvapor-airmixture.4.2AnonincendiveﬁeldcircuitshallbeevaluatedinaccordancewiththerequirementsforNonincendiveCircuits,Section6.4.3Eachmake/breakcomponentshallbe:a)ProtectedinaccordancewiththerequirementsforNormallyNonarcingComponents,Section5;orb)UsedinanonincendivecircuitthatcomplieswiththerequirementsforNonincendiveCircuits,Section6;orc)AnonincendivecomponentthatcomplieswiththerequirementsinNonincendiveComponentTests,Section11;ord)HermeticallysealedorasealeddevicethatcomplieswiththerequirementsinSealedDeviceTests,Section15A.4.3revisedSeptember28,19954.4Amongthefactorstakenintoconsiderationwhendeterminingtheacceptabilityofapolymericenclosurematerialare:resistancetosolventsascoveredbythehazardouslocationgrouporgroupsunderconsideration(seeChemical-ResistanceTests,Section15),andresistancetoaccumulationsofelectrostaticchargescapableofignitingthehazardous(classiﬁed)location.--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDTOCTOBER6,1995UL16048A4.5Afuseintendedforovercurrentprotectionofsignaling,alarm,remote-control,communicationsystems,orothercircuitnotnormallysubjecttooverloadingmaybehousedinageneral-purposeenclosure.4.6Asealeddeviceshallhaveafreeinternalvolumeoflessthan100cm3(6.1in3).4.6addedSeptember28,19954.7Themaximumratingofthesealeddeviceshallnotexceed240volts,3amperes.4.7addedSeptember28,19954.8Apouredsealofasealeddeviceshallbearrangedsothatitisnotsubjecttomechanicaldamageduringintendedoperation.4.8addedSeptember28,19954.9Sealingandencapsulatingmaterialforasealeddeviceshallhaveasofteningormeltingpointatleast20°C(36°F)higherthanthemaximumintendedoperatingtemperatureofthedevice.4.9addedSeptember28,19955NormallyNonarcingComponents5.1Eachmake/breakcomponentthatistobeconsiderednonarcingduringintendedoperationshallcomplywiththerequirementsin5.2–5.7,asapplicable.5.2Aconnectorinanincendivecircuitandincorporatedwithinequipmentshallbeconsiderednormallynonarcingifdisconnectionisnotrequiredduringoperationalmaintenanceandifitismechanicallypreventedfromseparatingorsecuredsothataseparatingforceofatleast15N(3.4pounds-force)ssibleduringoperationalmaintenance,theconnectorshallbemarkedinaccordancewith16.2.5.2revisedSeptember28,19955.3Afuseinanoperator-accessiblefuseion:Afuseholderassemblydeterminedtobeanonincendivecomponentneednotcomplywiththisrequirement.5.4Alampinanoperator-accessiblelampion:Atoolneednotberequiredtoremovethelamperneednotrequireatooltoremove.--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT8BUL1604OCTOBER6,1995NoTextonThisPage--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDTAPRIL28,1994UL160495.5Plugsandreceptaclesusedforconnectiontoassociatednonincendiveﬁeldcircuitsshallbenoninterchangeableifsuchinterchangewouldresultinincreasingtheenergyabovenonincendivelevels.5.6ProcesscontrolinstrumentsintendedforuseinClassI,Division2locationsmaybeconnectedthroughaﬂexiblecordandanattachmentplugandreceptacle,provided:a)Theinputcurrentdoesnotexceed3amperesat120volts;b)Thepower-supplycordis:1)Notmorethan3feet(915mm)long,2)Ofatypeacceptableforextra-hardusageorforhardusageifprotectedbylocation,and3)Suppliedthroughaplugandreceptacleofthelockingandgroundingtype;andc)Aswitch,ortheequivalent,ion:Theswitchneednotbeprovidedaspartoftheinstrumentifinstructionsareprovidedindicatingthatsuchaswitchisrequired.5.7Asupply-circuitvoltage-selectorswitchisconsideredtobenormallynonarcingifitisa)Locatedsothatitisnotaccessibletotheoperator.b)Markedinaccordancewith16.6.6NonincendiveCircuits6.1Eitherofthefollowingtwomethodsmaybeemployedtodeterminethatacircuitisnonincendive:a)Thecomparisonmethoddescribedin6.2–6.7,orb)Thetestmethoddescribedin10.1.1–10.4.3.6.2Thecalculatedormeasuredvaluesofcurrent,voltage,andassociatedinductancesandcapacitancesaretobecomparedtotheapplicablevaluesinFigures6.1–6.8toestablishthattheyarelessthanthosespeciﬁimumvoltageandcurrentlevels–dcoracpeak–incircuitsdeterminedtobenonincendivebythecomparisonmethodshallnot,forgivencircuitconstants,exceed75percentoftheminimumignitioncurrentorvoltageasdeterminedfromFigures6.1–ght Underwriters Laboratories Inc.

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No reproduction or networking permitted without license from IHSNot for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--10UL1604SEPTEMBER28,1995Figure6.1Figure6.1revisedSeptember28,1995Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT12UL1604SEPTEMBER28,1995Figure6.3Figure6.3revisedSeptember28,1995--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDTSEPTEMBER28,1995UL160413Figure6.4Figure6.4revisedSeptember28,1995Copyright Underwriters Laboratories Inc.

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No reproduction or networking permitted without license from IHSNot for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--14UL1604SEPTEMBER28,1995Figure6.5Figure6.5revisedSeptember28,1995--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDTSEPTEMBER28,1995UL160415Figure6.6--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Figure6.6revisedSeptember28,1995Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT16UL1604SEPTEMBER28,1995Figure6.7Figure6.7revisedSeptember28,1995Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT18UL1604APRIL28,19946.3Inevaluatinganonincendivecircuit,ignitionsourcessuchasthefollowingshallbeconsideredunderintendedoperatingconditions:a)Dischargeofacapacitivecircuit,b)Interruptionofaninductivecircuit,andc)Makingandbreakingofaresistivecircuit.6.4Circuitsthatcannotbereadilyassessedintermsofelementarycircuitsrepresentedbythecurvesandcircuitsinwhichthecurrentorvoltagevaluesexceedthoseindicatedonthecurvesshallbetested.6.5RESISTIVECIRCUITS–Figures6.1and6.2applytoresistivecircuitsandshowtheminimumcombinationofvoltageandcurrentthatwillignitegasesorvaporsinairforgroupsA,B,C,ﬁguresapplyonlytocircuitsinwhichtheoutputvoltage-currentcharacteristicisastraightlinedrawnbetweenopen-circuitvoltageandshort-circuitcurrent,thatis,novoltageorcurrentregulators.6.6INDUCTIVECIRCUITS–Figures6.3and6.4applytoinductivecircuitsandshowtheminimumcombinationofinductanceandcurrentat24voltsthatwillignitegasesorvaporsinairforGroupsA,B,C,s6.5and6.6applytoinductivecircuitsandshowtheminimumcombinationofvoltageandcurrentatspeciﬁcinductancethatwillignitegasesorvaporsinairforGroupBandformethane.6.7CAPACITIVECIRCUITS–Figures6.7and6.8applytocapacitivecircuitsandshowtheminimumcombinationofcapacitance,voltage,andrnotUCTION,CLASSII,DIVISION2,ANDCLASSIII,DIVISIONS1AND2EQUIPMENT7General7.1AnonincendiveﬁeldcircuitinClassII,Division2andClassIII,Divisions1and2equipmentshallbeevaluatedinaccordancewiththerequirementsforNonincendiveCircuits,Section6.7.2Forthecomparisonmethod,thecurvesonFigures6.1–6.8formethaneorpropanearetobeused.7.3Forthetestmethod(10.1.1–10.4.4),thetestmixtureistobe:a)8.3±0.3percentmethaneinair,orb)5.25±ght Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDTAPRIL28,1994UL1604198Enclosure8.1TheenclosureforClassII,Division2,andClassIII,Divisions1and2equipmentshalltotallyencloseallion:Portablebattery-poweredequipmentneednothaveallelectricalcomponentsandwiringenclosedprovidedallofthefollowingconditionsaremet:a)ncapsulatedtoadepthofatleast1mm(0.04inch)ofepoxyorequivalentmaterialisconsideredtobeinaccessibletodust.b)Circuitsthatmaybeinterruptedbymake/breakcomponentsshallbenonincendivewhentestedwithanyClassIlocationtestmixtureorwithamethane-airmixtureinaccordancewiththeSpark-IgnitionTest,Section10.c)ThereshallbenodamagetotheequipmentthatmayaffectitsacceptabilityforDivision2locationswhenitissubjectedtothedroptestspeciﬁedin12.2.8.2Afactorthatshallbeconsideredindeterminingtheacceptabilityofanonmetallicenclosurematerialisresistancetoaccumulationofdangerouselectrostaticcharges.8.3Dependingupontheapplication,anenclosureforClassII,Division2equipmentshallbeeither:a)Adusttightenclosureintendedtoexcludedust(see8.4),orb)Anenclosureintendedtominimizetheentranceofdust.8.4ForClassII,Division2equipment,switches,circuitbreakers,starters,fuses,ballasts,andthelikeshallbemountedwithinadusttightenclosure.8.5AnenclosureforClassIII,Divisions1and2equipmentshallbedusttight.8.6Agasketusedtorenderanenclosuredusttightshallbeformedofmaterialacceptableforthepurpose,suchasplant-ﬁtofelastomericorthermoplasticmaterialmaybeusedifitisresistanttoagingasdeterminedbytheAgingTestsofGaskets,ketshallbemechanicallysecuredorcaptionofthermoplasticgasketsunderconditionsofuseshallbeconsidered.8.7Anenclosureintendedtominimizetheentranceofdustshallbeprovidedwithtelescopingorclose-ﬁght Underwriters Laboratories Inc.

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No reproduction or networking permitted without license from IHSNot for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--20UL1604FEBRUARY3,2004Copyright Underwriters Laboratories Inc.

Provided by IHS under license with ULNo reproduction or networking permitted without license from IHS--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---PERFORMANCE9TemperatureTest9.1Equipment,whentestedundertheconditionsdescribedin9.2and9.3,shallnotexceedtheapplicabletemperatureinTable9.1onthefollowing:a)Anyexteriorpartoftheenclosure.b)AnyinternalpartofequipmentintendedforuseinaClassI,GroupA,B,C,ion:Thisrequirementdoesnotapplytointernalpartsofhermeticallysealedcomponents.c)AnyinternalpartofequipmentintendedforuseinaClassII,ion:Thisrequi9.1MaximumoperatingtemperaturesClassGroupEquipmentorpartsthatmaybeoverloadeda°CIIIIIIIIabEquipmentorpartsnotsubjecttooverloading°Cb200165165°Fb392329329°Fb302248248A,B,C,DFG–b150120120Equipmentandpartssubjecttooverloadingareresistors,powersupplies,ingteipmentthatmaybeoverloaded,alsosee16.5.9.2Themaximumoperatingtemperatureofanexternalorinternalsurfacethatasurroundingspeciﬁedﬂammablegas-orvapor-airmixtureorignitabledustmaycontahodologyforobtainingthesemaximumoperatingtemperatures(includingsampleselection,set-up,loading,andoperation)shallbeidenticaltothetemperaturetestmethodologyintheapplicableordinarylocationsstandard.9.2revisedFebruary3,20049.3AllvaluesfortemperaturesinTable9.1arebasedonanassumedambienttemperatureof40°C(104°F),however,testsmaybeconductedatanyambienttemperaturewithintherangeof10–40°C(50–104°F).Iftheequipmentisintendedforuseinanambienttemperaturehigherthan40°C,ee=Los Alamos National Labs/5926584100

Not for Resale, 04/12/2007 01:38:53 MDT--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---FEBRUARY3,2004UL160420A10Spark-IgnitionTest10.1General10.1.1Todeterminethatacircuitisnonincendive,thecircuitshallbetestedasdescribedin10.1.2–ght Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT20BUL1604FEBRUARY3,2004NoTextonThisPageCopyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--APRIL28,1994UL16042110.1.2Thetestistobeconductedunderthefollowingconditions:a)Forline-connectedequipment,theinputvoltageistobeincreasedto110percentofratedvoltage;andb)-ccircuitistobetestedfornotlessthan1000revolutions(12.5minutes)-ccircuitistobetestedfornotlessthan400revolutions(5minutes–200revolutionsateachpolarity)ofthewireholder.10.2Testapparatus10.2.1Theexplosionchamberusedforconductingtheignitiontestistohaveavolumeofapproximately250cubiccentimeters,inwhichcircuit-makingand-breakingsparkscanbeproducedinthepresenceoftheprescribedtestmixture.10.2.2Thespark-testapparatustobeusedisdescribedintheStandardforIntrinsicallySafeApparatusandAssociatedApparatusforUseinClassI,II,andIII,Division1Hazardous(Classiﬁed)Locations,ium,zinc,ormagnesiumarenotpresent,thecadmiumdiscinthetestapparatusmaybereplacedbyatindisc.10.3Testmixture10.3.1Thepurityofcommerciallyavailablegasesisnormallyacceptableforthesetests,butthoseofpuritylessthan95percentarenottobeused.10.3.2Thetestmixtureistobeasspeciﬁr,equipmentthatisintendedforuseinaparticulargasorvapormaybetestedinthemosteasilyignitedconcentrationofthatgas-orvapor-airmixtureinlieuofthemixturespeciﬁ10.1TestmixturesLocationTestmixtureGasPercentbyvolumeinairClassI,GroupA,onlyAcetyleneor8.7±0.5Hydrogen21.0±2.0ClassI,GroupsAandBHydrogen21.0±2.0ClassI,GroupCEthylene7.8±0.5ClassI,GroupDPropane5.25±0.25aMethane8.3±0.3aSeeException(b)ght Underwriters Laboratories Inc.

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No reproduction or networking permitted without license from IHSNot for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--22UL1604APRIL28,199410.4Veriﬁcationofsparktestapparatus10.4.1Thesensitivityofthespark-testapparatusistobecheckedbeforeandaftereachtestseriesinaccordancewith10.4.2–tapparatusistobeoperatedinoneoftwoveriﬁcationcircuits,a24-voltd-cinductivecircuitcontaininga0.095henryair-corecoilora24-voltd-cresistivecircuit(inductancelessthan10µH).ThecurrentintheveriﬁcationcircuitsistobesetatthevaluespeciﬁedfortheappropriatetestmixtureinTable10.2.10.4.2Theveriﬁcationcircuittobeusedistheonethatismostappropriatetothecircuitbeingtested.10.4.3Thespark-testapparatusistobeoperatedfor400revolutionsofthetungsten-wireholder,withtheholderatpositivepolarity,andshallbeconsideredtobeacceptableonlyifatleastoneignitionofthetestmixtureoccurs.10.4.4Thespark-testapparatusistobeinsertedinthecircuitundertestateachpointwhereaninterruptionnormallyoccurs.11NonincendiveComponentTests11.1Eachnonincendivecomponentshallbetestedasdescribedin11.2–roundinggas-orvapor-airmixtureshallnotigniteasaresultofthetest.11.2Anonincendivhintendedforusewithhighinrushcurrents,suchasamotorloadoratungstenloadistobesubjditioningandoverloadconditionsaretobeasdescribedintheStandardforIndustrialControlEquipment,UL508.11.3Anonincendivecomponentistobepreconditionedbyoperatingit6000timesattherateofapproximatelysixtimesperminutewhilecontrollingitsnormalelectricalload.11.4Followingthepreconditioningtest,thenonincendivecomponentistobeplacedinponen10.2CurrentinveriﬁcationcircuitTestmixtureCadmiumdiskTindiskInductivecircuit,mAResistivecircuit,mAInductivecircuit,mAResistivecircuit,mAHydrogen3Ethylene65700902000Propane10Methane1111.5Thenonincendivecomponentistobeﬁlledwitponentistobeoperated50timesat10secondintervals,andthetestmixtureistobeght Underwriters Laboratories Inc.

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No reproduction or networking permitted without license from IHSNot for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--SEPTEMBER28,1995UL16042312DropTests12.1Portablebattery-poweredequipmentshallbesubjectedtodroptestsasspeciﬁhallbenodamagetotheequipmentthatmayaffectitsacceptabilityforuseinDivision2locations.12.2Portablebattery-poweredequipmentistobedroppedsixtimes,notmorethanonceonanyonesurface,fromaheightof3feet(0.9m)ontoasmoothconcreteﬂstrictiveguidemaybeused.13AgingTestsofGaskets13.1Agasketofelastomericorthermoplasticmaterial,oracompositiongasketutilizinganelastomericmaterial,hetest,thegasketshallhaveatensilestrengthofnotlessthan75percentandanelongationofnotlessthan60percentofvaluesdeterminedforunagedsamples.13.1revisedSeptember28,199513.213.2deletedSeptember28,199513.3Thegasketistobeexposedtoatemperatureinaccordancewiththefollowingformula:inwhich:tisthetesttimeinhours(normally168hours),eis2.7183,Tistheagingtemperaturein°C,andT1isthemaximumusetemperature[40°C(104°F)minimum].13.3revisedSeptember28,199514Dusttight-EnclosureTests14.1General14.1.1Anenclosurethatisrequiredtobedusttightshallbetestedusingthedust-blastmethodortheatomized-watermethodasspeciﬁ14.1.2.14.1.2Metal-to-metaljointswithamachinedcontactsurfacemeetingetedshaftopeningsthathavealengthofpathof1/2inch(12.7mm)ormoreandatotaldiametricalclearancebetweentheshaftandtheopeningofnotmorethan0.005inch(0.127mm)per1/ointsandopeningsaretobeprotectedbyexternalmeansduringtheatomized-watertest.14.1.3Alengthofconduitmaybeinstalledintheenclosureundertesttoequalizetheinternalandexternalpressures,butitisnottoserveasadrain.--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT24UL1604APRIL28,199414.1.4Thetestlengthindicatedin14.2.1and14.3.1isthesumoftheheight,width,anddepthoftheenclosureundertest.14.2Dust-blastmethod14.2.1Theenclosureistobesubjectedtoablastofcompressedairmixedwithdry,Type1general-purposePortlandcementbyusingasuction-typesandblastgunthatisequippedwitha3/16-inch(4.8-mm)diameterairjetanda3/8-inch(9.5-mm)istobeatapressureof90–100psi(620–690kPa).sthan4poundsofcementperlinearfoot(6kg/m)oftestlengthoftheenclosureundertestistobeappliedatarateof5pounds(2.3kg)zleistobeheld12–15inches(305–381mm)awayfromtheenclosure,andtheblastofairandcementistobedirectedatallpointsofpotentialdustentry,suchasseams,joints,externaloperatingmechanisms,andthelike.14.2.2Type1general-purposePortlandcementistobeusedbecauseofitsavailabilityandcontrolledmaximumparticlesize.14.3Atomized-watermethod14.3.1Theenclosureistobesprayedwithatomizedwaterbyusinganozzlethatproducesaroundpattern3–4inches(76–102mm)indiameter,measured12inches(305mm)pressureistobe30psi(207kPa).Thewateristobesuppliedbyasuctionfeedwithasiphonheightof4–8inches(102–204mm).Notlessthan5ﬂuidouncesperlinearfoot(485mL/m)oftestlengthoftheenclosureundertestistobeappliedatarateof3gallons(11L)zleistobeheld12–15inches(305–381mm)fromtheenclosure,andthesprayofwateristobedirectedatallpointsofpotentialdustentry,suchasseams,joints,externaloperatingmechanisms,itmaybeinstalledtoequalizetheinternalandexternalpressures,butisnottoserveasadrain.15Chemical-ResistanceTests15.1Samplesofapolymericenclosureorrepresentativepartsofapolymericenclosureshallbeexposedfor24hourstosaturatedvaporsofthechemicalsspeciﬁplesshallnotshowanysignsofcracking,warping,shrinkage,swelling,orotherdeteriorationasaresultoftheexposure.15.2Aseparatesampleistobeusedforeachchemicalexposure.15.3Thechemicalstobeusedfortheexposuresare:a)Aceticacid(glacial)b)Acetonec)Ammoniumhydroxide(20percentbyweight)d)ASTMreferencefuelCe)Benzenef)Diethyletherg)Ethylacetate--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDTSEPTEMBER28,1995UL160425h)Ethylenedichloridei)Furfuralj)n-Hexanek)Methylethylketonel)Methanolm)2-Nitropropane15ASealedDeviceTests15AaddedSeptember28,199515A.1AsealeddeviceshallbesubjectedtotheChemical-ResistanceTest,Section15.15A.2Aftercoolingto25°C(77°F)followingconditioninginaccordancewiththeagingtestspeciﬁedin13.3,asealeddeviceshall:a)Notleakatarategreaterthan10-5mlofairpersecondatapressuredifferentialof1atmosphere(101.3kPa)whenmeasuredbyaleak-ratedetector,orb)Notemitbubbleswhensubjectedtooneoftheairleakagetestsspeciﬁedin15A.3.15A.3Withreferenceto15A.2(b),asealeddevicethatistobesubjectedtoanairleakagetestshallbe:a)Immersedinwateratatemperatureof50°C(122°F)toaminimumdepthof1inch(25mm)foraminimumof1minute,orb)Immersedinwateratatemperatureof50°C(122°F)toaminimumdepthof3inches(76mm)pressurewithintheenclosureshallthenbereducedby4.7inches(120mm)G16General16.1Theequipmentshallbemarkedwiththefollowing:a)Nameofthemanufacturerorprivatelabeler,trademark,tradename,orotheridentifyingsymbol.b)Catalog,style,model,orotherdesignation.c)Electricalrating:1)Volts,2)Frequency,and3)Amperes,ght Underwriters Laboratories Inc.

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No reproduction or networking permitted without license from IHSNot for Resale, 04/12/2007 01:38:53 MDT---`,,`,`,,`,,`-`-,,`,,,,``,,``,,```,````,`,,``--26UL1604OCTOBER6,1995d)Hazardouslocationclass,division,andgroups,orinlieuofgroups,ion:Forportablebattery-poweredequipment,thegroupmarkingmaybeomittediftheequipmentisacceptableforallofthegroupswithintheclass.e)Temperaturemarkinginaccordancewith16.4,ifrequiredby16.3.f)Anyothermarkingsorinformationnecessaryfortheinstallationandoperationoftheequipment.16.1.1Inadditionto,orasanalternativeto,themarkingrequirementin16.1(d),equipment,circuits,orcomponentsthathavebeeninvestigatedandfoundtocomplywiththerequirementsforClassI,Division2,GroupDlocationsmayadditionallyoralternativelybemarkedClassI,Zone2,GroupIIA.16.1.1addedOctober6,199516.1.2Inadditionto,orasanalternativeto,themarkingrequirementin16.1(d),equipment,circuits,orcomponentsthathavebeeninvestigatedandfoundtocomplywiththerequirementsforClassI,Division2,GroupClocationsmayadditionallyoralternativelybemarkedClassI,Zone2,GroupIIB.16.1.2addedOctober6,199516.1.3Inadditionto,orasanalternativeto,themarkingrequirementin16.1(d),equipment,circuits,orcomponentsthathavebeeninvestigatedandfoundtocomplywiththerequirementsforbothClassI,Division2,GroupA,andClassI,Division2,GroupBlocationsmayadditionallyoralternativelybemarkedClassI,Zone2,GroupIIC.16.1.3addedOctober6,199516.1.4Equipment,circuits,orcomponentsmarkedGroupIIBmayalsobemarkedGroupIIA.16.1.4addedOctober6,199516.1.5Equipment,circuits,orcomponentsmarkedGroupIICmayalsobemarkedGroupIIA,GroupIIB,orbothGroupIIAandGroupIIB.16.1.5addedOctober6,199516.2Eachoperator-accessibleconnector,fuseholder,andlampholderinanincendivecircuitshallbemarkedwiththeword″WARNING″andthefollowingwordingortheequivalent:″Donotdisconnectwhilecircuitisaliveunlessareaisknowntobenonhazardous.″Themarkingshallbeonoradjacenttotheconnector,fuseholder,orlampholder,ion:Thisrequirementdoesnotapplytononincendivecomponents16.3Equipmentthatattainsatemperaturehigherthan100°C(212°F)basedona40°C(104°F)ambientshallbemarkedeitherwiththeapplicablemaximumoperatingtemperatureoroperatingtemperaturecodeasspeciﬁe16.5.--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDTOCTOBER6,1995UL160427Table16.1TemperaturemarkingMaximumoperatingtemperature°C45516°F842572536556329325OperatingtemperaturecodeoridentiﬁcationnumberT1T2T2AT2BT2CT2DT3T3AT3BT3CT4T4AT5T616.4Themaximum-operatingtemperatureortemperaturecodeshallbeinanindividualblockonthenameplateandshallbeproperlyidentiﬁed;forexample,″Operatingtemperature_____________″,or″OperatingTemperatureCode_____________″,ortheequivalent.16.5ForequipmentforuseinClassIhazardouslocationsthatissubjecttooverloading,themaximumoperatingtemperatureoroperatingtemperaturecodeshallbebasedon125percentofthetemperatureobtainedintheTemperatureTest,Section9.16.6Avoltage-selectorswitchrequiredtobemarkedinaccordancewith5.7(b)shallbemarkedwiththeword″WARNING″andthefollowingwordingortheequivalent:″perateSwitchWhileCircuitisLive.″Themarkingshallbeonoradjacenttotheswitch.--``,,`,````,```,,``,,``,,,,`,,-`-`,,`,,`,`,,`---Copyright Underwriters Laboratories Inc.

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Not for Resale, 04/12/2007 01:38:53 MDT28UL1604OCTOBER6,1995NoTextonThisPageCopyright Underwriters Laboratories Inc.

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