CSA C22 2 NO 0 1-M1985-1985 General requirements for double-insulated equipment (First Edition).pdf

1、C22.2 No. 0.1-M1985(reaffirmed 2013)General requirements for double-insulated equipmentStandards Update ServiceC22.2 No. 0.1-M1985April 1985Title: General requirements for double-insulated equipmentPagination: 16 pages To register for e-mail notification about any updates to this publicationgo to sh

2、op.csa.caclick on CSA Update ServiceThe List ID that you will need to register for updates to this publication is 2001058.If you require assistance, please e-mail techsupportcsagroup.org or call 416-747-2233.Visit CSA Groups policy on privacy at csagroup.org/legal to find out how we protect your per

3、sonal information.ContentsStandards Steering Committee on Canadian Electrical Code, Part IISubcommittee on C22.2 No. 0.1PrefaceForeword1. Scope2. Definitions3. General Requirements3.1 Reference Publications4. Construction4.1 General4.2 Openings and Recesses4.3 Mechanical Assembly4.4 Supply Connectio

4、ns4.5 Spacings4.6 Reinforced Insulation4.6.1 General4.6.2 Brushcaps and Brush Holders4.6.3 Commutator and End Turns of the Armature Winding4.6.4 Switches4.6.5 Power Supply Cord4.6.6 Internal Wiring4.6.7 Other Locations4.7 Moisture Absorption Resistance and Flammability Classification of Insulation M

5、aterial5. Marking6. Tests6.1 General6.2 Dielectric Strength6.3 Leakage Current6.4 Mechanical Strength6.4.1 Drop6.4.2 Impact6.5 Thermal Stability6.6 Supplementary InsulationCopyright CSA International2Standards Steering Committee on Canadian Electrical Code, Part IIK.R. DunphyCanadian Standards Assoc

6、iation,Rexdale, OntarioChairmanJ.F. MorrisonCanadian Standards Association,Rexdale, OntarioStandards Administrator, NonvotingRepresenting Regulatory AuthoritiesC.M. ButlerNewfoundland Department of Labour and Manpower, St. JohnsD.H. DunsireManitoba Hydro, WinnipegR.L. HicksOntario Hydro, TorontoJ.T.

7、 KokotalloSaskatchewan Department of Labour,ReginaA.R. LuckBritish Columbia Ministry of Labour,VancouverM. RiendeauMinistre de lHabitation et de la Protection du consommateur,Montral, QubecC.M. SpeersAlberta Labour, EdmontonRepresenting Manufacturers (Electrical and Electronic Manufacturers Associat

8、ion of Canada)G. BedinghamMotorola Canada Limited,Willowdale, OntarioJ.R. CaiccoCanadian General Electric CompanyLimited, Toronto, OntarioR.D. ColvinAllen-Bradley Canada Ltd.,Cambridge, OntarioR.E. EdwardsAlcan Canada Products, Limited,Toronto, OntarioJ.G.C. HendersonCanada Wire and Cable Limited,Do

9、n Mills, OntarioC.E. McRobertsFederal Pioneer Limited,Thornhill, OntarioR.A. WilsonWestinghouse Canada Inc.,Hamilton, Ontario Representing General InterestsG.W. BrandCity of Vancouver, British ColumbiaI.M. ClarkCanadian Electrical Association,Montreal, QuebecCopyright CSA International3G.E. Davidson

10、Toronto, OntarioConsumer RepresentativeR.E. DowlingCanadian Standards Association,Rexdale, OntarioAlternateJ.E. DuncanCanadian Standards Association,Rexdale, OntarioK.G. GuptayConsumer and Corporate Affairs Canada,Hull, QuebecK.W. LeungAlberta Workers Health, Safety andCompensation, EdmontonG. NealN

11、ational Research Council,Ottawa, OntarioG. SeabrookDepartment of Regional IndustrialExpansion, Ottawa, OntarioAssociate MembersB.H. ChickPublic Work Canada,Ottawa, OntarioP. DouglasBSI/CSA Agency,Herts, EnglandRepresenting British Standards InstitutionD.L. JohnsonHealth and Welfare Canada,Ottawa, On

12、tarioF.K. KitzantidesNational Electrical Manufacturers Association,Washington, D.C., USAD.S. MartinUnderwriters Laboratories of Canada,Scarborough, OntarioH.A. RastonStandards Council of Canada,Mississauga, OntarioJ.A. TomsCanadian Gas Association,Don Mills, Ontario Copyright CSA International4Subco

13、mmittee on C22.2 No. 0.1J.R. CaiccoCanadian General Electric Company Limited,Toronto, OntarioChairmanJ.E. DuncanCanadian Standards Association,Rexdale, OntarioVice-ChairmanL.E. AikenIBM Corporation,Lexington, Kentucky, USAB.E. ArnettHoover Canada Inc.,Burlington, OntarioR.J. BarnardBlack and Decker

14、Canada Inc.,Brockville, OntarioG.W. BrandCity of Vancouver,British ColumbiaW.H. GriffithThe Singer Company,Fairfield, New Jersey, USAJ. GuestCanadian Standards Association,Rexdale, OntarioR. JohnsonDigital Equipment Corporation,Concord, Massachusetts, USAR.L. LaRoccaUnderwriters Laboratories Inc.,Lo

15、ng Island, New York, USAJ.F. MorrisonCanadian Standards Association,Rexdale, OntarioStandards Administrator, Nonvoting Copyright CSA International5PrefaceThis is the first edition of 0.1 of a series of Standards issued by Canadian Standards Association under Part II of theCanadian Electrical Code.Th

16、is Standard is dedicated to the late Don Manson who was a member of Canadian Standards Associations Staff formany years during which time he made major contributions to both Part I and Part II of the Canadian Electrical Code.Mr. Manson was particularly active in Canada in bringing credibility to the

17、 concept of double insulation as an alternativeto the use of grounding for providing the user with improved protection against the hazards of electrical shock.Double-insulated electric equipment was first certified in 1958. The product was a power tool. While the term wasnew, the concept was not. As

18、 far back as 1923, the Ontario Hydro Approvals Division approved an electric washingmachine with the electric motor protected by a guard and effectively insulated from the metal parts of the machine. Thereport stated this was necessary until some practical method of grounding was developedOver the p

19、ast 25 years, many double-insulated appliances and equipment have been certified and have had anexcellent safety record. This Standard reflects the experience gained by CSA during this periodSubcommittees writing double-insulated requirements for products covered by the standard are expected to adop

20、tthis Standard by reference and to specify in their standards those additional or amendatory requirements foundnecessary for their particular products.For general information on standards of the Canadian Electrical Code, Part II, see the preface of CSA StandardC22.2 No. 0. General RequirementsCanadi

21、an Electrical Code, Part II.This Standard was prepared by a Subcommittee under the jurisdiction of the Standards Steering Committee on CECode, Part II, and was formally approved by this Committee.April, 1985Note: Although the intended primary application of this Standard is stated in its Scope, it i

22、s important to note that it remains the responsibilityof the user of the Standard to judge its suitability for his or her particular purpose. CSA Standards are subject to periodical review and suggestions for their improvement will be referred to the appropriate committee. Allenquiries regarding thi

23、s Standard, including requests for interpretation, should be addressed to Canadian Standards Association, StandardsDivision, 178 Rexdale Boulevard, Rexdale (Toronto), Ontario M9W 1R3. Requests for interpretation should(a) define the problem. making reference to a specific Clause, and, where appropri

24、ate, include an illustrative sketch;(b) provide an explanation of circumstances surrounding the actual field condition, and(c) be phrased, where possible, to permit a specific “yes“ or “no“ answer. Interpretations are published in “CSA Information Update“. For subscription details and a free sample

25、copy write to CSA BusinessDevelopment Group or telephone (476) 747-4019. Copyright CSA International6ForewordCanadian Standards Association provides certification services for manufacturers who, under license from CSA, wish touse the appropriate registered CSA Marks on certain products of their manu

26、facture to indicate conformity with CSAStandards.CSA Certification for a number of products is provided in the interest of maintaining agreed-upon standards ofquality, performance, interchangeability and/or safety, as appropriate. Where applicable, certification may form thebasis for acceptance by i

27、nspection authorities responsible for enforcement of regulations. Where feasible, programs willbe developed for additional products for which certification is desired by producers, consumers or other interests.In performing its functions in accordance with its objectives, CSA does not assume or unde

28、rtake to discharge anyresponsibility of the manufacturer or any other party. The opinions and findings of the Association represent itsprofessional judgement given with due consideration to the necessary limitations of practical operation and state of theart at the time the Standard is processed.Pro

29、ducts in substantial accord with this Standard but which exhibit a minor difference or a new feature may bedeemed to meet the Standard providing the feature or difference is found acceptable utilizing appropriate CSACertification Division Operating Procedures. Products which comply with this Standar

30、d shall not be certified if they arefound to have additional features which are inconsistent with the intent of this Standard. Products shall not be certifiableif they are discovered to contravene applicable Federal laws or regulations.Testing techniques, test procedures and instrumentation frequent

31、ly must be prescribed by the CSA CertificationDivision in addition to the technical requirements contained in Standards of CSA. In addition to markings specified in theStandard the CSA Certification and Testing Division may require special cautions, markings and instructions that arenot specified by

32、 the Standard.Some tests required by CSA Standards may be inherently hazardous. The Association neither assumes nor acceptsany responsibility for any injury or damage that may occur during or as the result of tests, wherever performed, whetherperformed in whole or in part by the manufacturer or the

33、Association, and whether or not any equipment, facility orpersonnel for or in connection with the test is furnished by the manufacturer or the Association.Manufacturers should note that, in the event of the failure of the CSA Certification and Testing Division to resolve anissue arising from the int

34、erpretation of requirements, there is an appeal procedure; the complainant should submit thematter, in writing, to the Secretary of the Canadian Standards Association.If this Standard is to be used in obtaining CSA Certification please remember, when making application forcertification, to request a

35、ll current Amendments, Bulletins, Notices and Technical Information Letters that may beapplicable and for which there may be a nominal charge. For such information or for further information concerningdetails about CSA Certification please address your inquiry to the Applications and Records Section

36、, CanadianStandards Association, 178 Rexdale Boulevard, Rexdale (Toronto), Ontario M9W 1R3. Copyright CSA International71. Scope1.1This Standard is intended to provide basic requirements for the evaluation of double-insulated cord-connected electricalequipment.1.2This Standard applies to equipment f

37、or use on circuits not exceeding 250 V-to-ground and designed to be used inaccordance with the Rules of the Canadian Electrical Code, Part I.1.3This Standard supplements individual standards of the Canadian Electrical Code, Part II.1.4Individual product standards may specify, as necessary, other dou

38、ble-insulated construction and test requirementsbecause of the particular nature and application of their product.2. Definitions2.1The following definitions apply in this Standard: Basic insulation means insulation applied to bare live parts in order to separate them from nonaccessiblenon-current-ca

39、rrying metal parts, or from supplementary insulation, or from both.Cord-connected equipment means equipment which is connected to the electrical supply by a flexible power supplycord and attachment plugCounter-supported equipment means cord-connected equipment that is physically supported by a count

40、er, table, orbench during the performance of its intended functionDouble-insulated equipment means equipment in which double insulation, or reinforced insulation, or both, is usedthroughout and without provision for grounding.Notes:(1) Insulating material may form a part of or the whole of the enclo

41、sure of double-insulated equipment.(2) Equipment constructed with double, or reinforced insulation, or both, throughout but which has a 3-conductor cord and attachment plugfor grounding certain non-current-carrying metal parts is considered to be grounded equipment and not double-insulated equipment

42、. Double insulation means an insulation system comprised of both basic insulation and supplementary insulation soarranged that they are not simultaneously subjected to the same deteriorating influences of the stresses (eg. electricfield, temperature, contaminants) to the same degree.Fixed equipment

43、means equipment that is fastened or otherwise secured at a specific location.Floor-supported equipment means cord-connected equipment that is physically supported by the floor during theperformance of its intended function.Live part for any particular product is defined in the end-product standard.R

44、einforced insulation means an insulation system applied to bare live parts to separate them from accessible, orexternal surfaces, or both (see Clause 4.6).Note: The term “insulation system“ does not imply that the insulation must be one homogeneous piece, but may comprise several layerswhich cannot

45、be tested singly as supplementary or basic insulation. Stationary equipment means equipment that is fastened or otherwise secured at a specific locationSupplementary insulation means an insulation applied in addition to the basic insulation in order to prevent contact,with nonaccessible non-current-

46、carrying metal parts, or basic insulation, or both.Note: An enclosure of insulating materiel may form a part of or the whole of the supplementary insulation. 3. General Requirements3.1 Reference PublicationsWhere reference is made to CSA Standards of the Canadian Electrical Code, Parts I and II, suc

47、h reference shall beconsidered to refer to the latest edition and revision thereto, unless otherwise specified. This Standard refers to thefollowing such standards and the year dates shown indicate the latest editions available at the time of printing:C22.1-1982,Canadian Electrical Code, Part I;Copy

48、right CSA International8C22.2 No. 0-M1982,General RequirementsCanadian Electrical Code, Part II.3.2For constructions that employ exposed non-current-carrying metal parts, the construction shall be such that failure oftwo independent sections of insulation must occur before any exposed metal can beco

49、me alive, unless the constructionis such that reinforced insulation is used.3.3Basic insulation and non-current-carrying metal parts insulated from bare live parts by basic insulation shall not beaccessible to the user (as determined by Clause 4.2.2).3.4Supplementary insulation shall provide insulating and mechanical properties not less than those of the basic insulationnormally acceptable for the equipment and shall be capable of ensuring protection against electric shock in the event ofa failure of the basic insulation.3.5Where part or whole of the enclosure i