CSA C22.1 2021 Canadian Electrical Code, Part I (25th Edition), Safety Standard for Electrical Installations.pdf

CSA C22.1 2021 Canadian Electrical Code, Part I (25th Edition), Safety Standard for Electrical Installations.pdf

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CSAC22.1:

21CanadianElectricalCode,PartISafetyStandardforElectricalInstallations202125thEditionfiStandrdsConcilofCanadaUConse1Icanad1endesnormesLegalNoticeforStandardsCanadianStandardsAssociation（operatingasCSAGroup）developsstandardsthroughaconsensusstandardsdevelopmentprocessapprovedbytheStandardsCouncilofCanada.Thisprocessbringstogethervolunteersrepresentingvariedviewpointsandintereststoachieveconsensusanddevelopastandard.AlthoughCSAGroupadministerstheprocessandestablishesrulestopromotefairnessinachievingconsensus,itdoesnotindependentlytest,evaluate,orverifythecontentofstandards.DisclaimerandexclusionofliabilityThisdocumentisprovidedwithoutanyrepresentations,warranties,orconditionsofanykind,expressorimplied,including,withoutlimitation,impliedwarrantiesorconditionsconcerningthisdocumentsfitnessforaparticularpurposeoruse,itsmerchantability,oritsnon-infringementofanythirdpartysintellectualpropertyrights.CSAGroupdoesnotwarranttheaccuracy,completeness,orcurrencyofanyoftheinformationpublishedinthisdocument.CSAGroupmakesnorepresentationsorwarrantiesregardingthisdocumentscompliancewithanyapplicablestatute,rule,orregulation.INNOEVENTSHALLCSAGROUP,ITSVOLUNTEERS,MEMBERS,SUBSIDIARIES,ORAFFILIATEDCOMPANIES,ORTHEIREMPLOYEES,DIRECTORS,OROFFICERS,BELIABLEFORANYDIRECT,INDIRECT,ORINCIDENTALDAMAGES,INJURY,LOSS,COSTS,OREXPENSES,HOWSOEVERCAUSED,INCLUDINGBUTNOTLIMITEDTOSPECIALORCONSEQUENTIALDAMAGES,LOSTREVENUE,BUSINESSINTERRUPTION,LOSTORDAMAGEDDATA,ORANYOTHERCOMMERCIALORECONOMICLOSS,WHETHERBASEDINCONTRACT,TORT（INCLUDINGNEGLIGENCE）,ORANYOTHERTHEORYOFLIABILITY,ARISINGOUTOFORRESULTINGFROMACCESSTOORPOSSESSIONORUSEOFTHISDOCUMENT,EVENIFCSAGROUPHASBEENADVISEDOFTHEPOSSIBILITYOFSUCHDAMAGES,INJURY,LOSS,COSTS,OREXPENSES.Inpublishingandmakingthisdocumentavailable,CSAGroupisnotundertakingtorenderprofessionalorotherservicesfororonbehalfofanypersonorentityortoperformanydutyowedbyanypersonorentitytoanotherpersonorentity.Theinformationinthisdocumentisdirectedtothosewhohavetheappropriatedegreeofexperiencetouseandapplyitscontents,andCSAGroupacceptsnoresponsibilitywhatsoeverarisinginanywayfromanyandalluseoforrelianceontheinformationcontainedinthisdocument.CSAGroupisaprivatenot-for-profitcompanythatpublishesvoluntarystandardsandrelateddocuments.CSAGrouphasnopower,nordoesitundertake,toenforcecompliancewiththecontentsofthestandardsorotherdocumentsitpublishes.IntellectualpropertyrightsandownershipAsbetweenCSAGroupandtheusersofthisdocument（whetheritbeinprintedorelectronicform）,CSAGroupistheowner,ortheauthorizedlicensee,ofallworkscontainedhereinthatareprotectedbycopyright,alltrade-marks（exceptasotherwisenotedtothecontrary）,andallinventionsandtradesecretsthatmaybecontainedinthisdocument,whetherornotsuchinventionsandtradesecretsareprotectedbypatentsandapplicationsforpatents.Withoutlimitation,theunauthorizeduse,modification,copying,ordisclosureofthisdocumentmayviolatelawsthatprotectCSAGroupsand/orothersintellectualpropertyandmaygiverisetoarightinCSAGroupand/orotherstoseeklegalredressforsuchuse,modification,copying,ordisclosure.Totheextentpermittedbylicenceorbylaw,CSAGroupreservesallintellectualpropertyrightsinthisdocument.PatentrightsAttentionisdrawntothepossibilitythatsomeoftheelementsofthisstandardmaybethesubjectofpatentrights.CSAGroupshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Usersofthisstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrightsisentirelytheirownresponsibility.AuthorizeduseofthisdocumentThisdocumentisbeingprovidedbyCSAGroupforinformationalandnon-commercialuseonly.Theuserofthisdocumentisauthorizedtodoonlythefollowing:

Ifthisdocumentisinelectronicform:

loadthisdocumentontoacomputerforthesolepurposeofreviewingit;searchandbrowsethisdocument;andprintthisdocumentifitisinPDFformat.LimitedcopiesofthisdocumentinprintorpaperformmaybedistributedonlytopersonswhoareauthorizedbyCSAGrouptohavesuchcopies,andonlyifthisLegalNoticeappearsoneachsuchcopy.Inaddition,usersmaynotandmaynotpermitotherstoalterthisdocumentinanywayorremovethisLegalNoticefromtheattachedstandard;sellthisdocumentwithoutauthorizationfromCSAGroup;ormakeanelectroniccopyofthisdocument.IfyoudonotagreewithanyofthetermsandconditionscontainedinthisLegalNotice,youmaynotloadorusethisdocumentormakeanycopiesofthecontentshereof,andifyoudomakesuchcopies,youarerequiredtodestroythemimmediately.UseofthisdocumentconstitutesyouracceptanceofthetermsandconditionsofthisLegalNotice.InadditiontoCSAC22.1:

21,CanadianElectricalCode,PartI,CSAGroupoffersavarietyofrelatedpublicationsandresourcesdesignedtoassistwiththeinterpretationandapplicationoftheCode.Ourinstructor-ledtrainingcanbeavailableinbothvirtualandin-personformatsasrequired.HandbookThe2021CanadianElectricalCodeHandbookprovidesdetailedrationaleandbackgroundinformationbehindtherequirementsinCSAC22.1:

21.Thehandbookhelpsyoufindinformationquicklyandexplainstherulesinplain,easy-to-understandlanguage.OverviewofChangesTrainingSelf-guidedonlineIInstructor-ledpublicIInstructor-ledonsiteDesignedforprofessionalswithagoodworkingknowledgeoftheCodewhoonlyneedtoknowthechangesinthe2021edition.EssentialsTrainingSelf-guidedonlineIInstructor-ledpublicIInstructor-ledonsiteIdealfornewCodeusers.Gainanunderstandingofthedefinitions,scopeandobjectiveofthe2021Codeastheyapplytoconstruction-relatedelectricalinstallations.ModularTrainingSelf-guidedonlineIInstructor-ledonsiteCreateyourownself-guidedonlineorinstructor-ledonsitecoursebasedonspecificsectionsoftheCode.Choosefrommorethan30trainingmodulesreferencingspecificCodesectionstocreateacustomizedlearningexperienceforyouoryourteam.LearnmoreFormoreinformationortopurchaseCSAC22.1:

21,CanadianElectricalCode,PartIproducts:

18004636727csagroup.org/2021CECode2021CanadianStandardsAssociation.AllRightsReserved.na3StandardsUpdateServiceCSAC22.1:

21January2021Title:

CanadianElectricalCode,PartIToregisterfore-mailnotificationaboutanyupdatestothispublicationgotostore.csagroup.orgclickonProductUpdatesTheListIDthatyouwillneedtoregisterforupdatestothispublicationis2427285.Ifyourequireassistance,pleasee-mailtechsupportcsagroup.orgorcall416-747-2233.VisitCSAGroupspolicyonprivacyatwww.csagroup.org/legaltofindouthowweprotectyourpersonalinformation.CanadianStandardsAssociation（operatingasCSAGroup）,underwhoseauspicesthisNationalStandardhasbeenproduced,wascharteredin1919andaccreditedbytheStandardsCouncilofCanadatotheNationalStandardssystemin1973.Itisanot-for-profit,nonstatutory,voluntarymembershipassociationengagedinstandardsdevelopmentandcertificationactivities.CSAGroupstandardsreflectanationalconsensusofproducersandusers-includingmanufacturers,consumers,retailers,unionsandprofessionalorganizations,andgovernmentalagencies.Thestandardsareusedwidelybyindustryandcommerceandoftenadoptedbymunicipal,provincial,andfederalgovernmentsintheirregulations,particularlyinthefieldsofhealth,safety,buildingandconstruction,andtheenvironment.Individuals,companies,andassociationsacrossCanadaindicatetheirsupportforCSAGroupsstandardsdevelopmentbyvolunteeringtheirtimeandskillstoCommitteeworkandsupportingCSAGroupsobjectivesthroughsustainingmemberships.Themorethan7000committeevolunteersandthe2000sustainingmembershipstogetherformCSAGroupstotalmembershipfromwhichitsDirectorsarechosen.SustainingmembershipsrepresentamajorsourceofincomeforCSAGroupsstandardsdevelopmentactivities.CSAGroupofferscertificationandtestingservicesinsupportofandasanextensiontoitsstandardsdevelopmentactivities.Toensuretheintegrityofitscertificationprocess,CSAGroupregularlyandcontinuallyauditsandinspectsproductsthatbeartheCSAGroupMark.InadditiontoitsheadofficeandlaboratorycomplexinToronto,CSAGrouphasregionalbranchofficesinmajorcentresacrossCanadaandinspectionandtestingagenciesineightcountries.Since1919,CSAGrouphasdevelopedthenecessaryexpertisetomeetitscorporatemission:

CSAGroupisanindependentserviceorganizationwhosemissionistoprovideanopenandeffectiveforumforactivitiesfacilitatingtheexchangeofgoodsandservicesthroughtheuseofstandards,certificationandrelatedservicestomeetnationalandinternationalneeds.ForfurtherinformationonCSAGroupservices,writetoCSAGroup178RexdaleBoulevardToronto,Ontario,M9W1R3CanadaANationalStandardofCanadaisastandarddevelopedbyanSCC-accreditedStandardsDevelopmentOrganization（SDO）,andapprovedbytheStandardsCouncilofCanada（SCC）,inaccordancewithSCCs:

RequirementsandGuidance-AccreditationforStandardsDevelopmentOrganizations,andRequirementsandGuidance-ApprovalofNationalStandardsofCanadaDesignation.MoreinformationonNationalStandardrequirementscanbefoundatwww.scc.ca.Ansec-approvedstandardreflectstheconsensusofanumberofexpertswhosecollectiveinterestsprovide,tothegreatestpracticableextent,abalanceofrepresentationofaffectedstakeholders.National