CSA C22 2 NO 0 12-M1985-1985 Wiring Space and Wire Bending Space in Enclosures for Equipment Rated 750 V or Less (First Edition General Instruction No 2 July 1985).pdf

1、C22.2 No. 0.12-M1985Wiring Space and WireBending Space in Enclosures for EquipmentRated 750 V or LessElectrical InstallationPlease Note: Refers to a formally approvedrevision dated July 1985. Copyright Canadian Standar ds Association 1985All rights reserved. No part of this publication may bereprodu

2、ced in any form, in an electronic retrieval systemor otherwise, without the prior permission of thepublisher.ContentsStandards Steering Committee on Canadian Electrical Code, Part IISubcommittee on C22.2 No. 0.12PrefaceForeword1. Scope2. Definitions3. Requirements3.1 General3.2 Wiring Space (See App

3、endix A.)3.3 Wire Bending Space at Field Wiring Terminals Including the Neutral (See Appendix A.)3.4 Wire Bending Space at Other Than Field TerminalsAppendix A Examples of Wiring Space and Wire Bending SpaceCopyright CSA International2Standards Steering Committee on Canadian Electrical Code, Part II

4、K.R. Dunphy Canadian Standards Association,Rexdale, Ontario ChairmanJ.F. Morrison Canadian Standards Association,Rexdale, Ontario Standards Administrator, NonvotingRepresenting Regulatory AuthoritiesD. Bennicke Nova Scotia Department of Labour and Manpower, HalifaxC.M. Butler Newfoundland Department

5、 of Labour and Manpower, St. JohnsD.H. Dunsire Manitoba Hydro, WinnipegR.L. Hicks Ontario Hydro, TorontoA.R. Luck British Columbia Ministry of Labour, VancouverM. Riendeau Ministre de lHabitation et de la Protection du consommateur, Montral, QubecC.M. Speers Alberta Labour, EdmontonRepresenting Manu

6、facturers (Electrical and Electronic Manufacturers Association of Canada)G. Bedingham Motorola Canada Limited,Willowdale, OntarioJ.R. Caicco Canadian General Electric Company Limited,Toronto, OntarioR.D. Colvin Allen-Bradley Canada Ltd.,Cambridge, OntarioR.E. Edwards Alcan Canada Products, Limited,T

7、oronto, OntarioJ.G.C. Henderson Canada Wire and Cable Limited,Don Mills, OntarioC.E. McRoberts Federal Pioneer Limited,Toronto, Ontario R.A. Wilson Westinghouse Canada Inc.,Hamilton, OntarioRepresenting General InterestsG.W. Brand City of Vancouver,British ColumbiaRepresenting CE Code, Part II.M. Cl

8、ark Canadian Electrical Association,Montreal, QuebecRepresenting Canadian Electrical AssociationCopyright CSA International3G.E. DavidsonToronto, OntarioR.E. Dowling Canadian Standards Association,Rexdale, OntarioAlternateJ.E. Duncan Canadian Standards Association,Rexdale, OntarioK.G. Gupta Departme

9、nt of Consumer and CorporateAffairs,Hull, QuebecRepresenting Federal Department ofConsumer and Corporate AffairsK.W. Leung Alberta Workers Health, Safety andCompensation, EdmontonG. Neal National Research Council,Ottawa, OntarioRepresenting National Research CouncilG. Seabrook Department of Regional

10、 IndustrialExpansion,Ottawa, OntarioAssociate MembersB.H. Chick Public Works Canada,Ottawa, OntarioP. Douglas British Standards Institution,Hemel Hempstead, Hertfordshire,EnglandD.L. Johnson Health and Welfare Canada,Ottawa, OntarioF.K. Kitzantides National Electrical ManufacturersAssociation,Washin

11、gton, D.C., USAD.S. Martin Underwriters Laboratories of Canada,Scarborough, OntarioH.A. Raston Standards Council of Canada,Mississauga, OntarioJ.A. Toms Canadian Gas Association,Don Mills, Ontario Copyright CSA International4Subcommittee on C22.2 No. 0.12C.E. McRoberts Thornhill, OntarioChairmanM.M.

12、 Bourassa Phillips Cables Limited,Brockville, OntarioR.D. Colvin Allen-Bradley Canada Ltd.,Cambridge, OntarioR.E. Dowling Canadian Standards Association,Rexdale, OntarioR.L. Hicks Ontario Hydro,TorontoM.R. Holman Square D Canada,Waterloo, OntarioD.M. Kitson Manitoba Hydro,WinnipegG. Longmuir Command

13、er Electrical Equipment, Inc.,Scarborough, OntarioM. Riendeau Ministre de lHabitation et de laProtection du Consommateur,Montral, QubecP.D. Smith Polygon Industries Ltd.,Toronto, OntarioR.H. Strickland Federal Pioneer Limited,Bramalea, OntarioJ.F. Morrison Canadian Standards Association,Rexdale, Ont

14、arioStandards Administrator Copyright CSA International5PrefaceThis is the first edition of No. 0.12 of a series of Standards issued by Canadian Standards Association under Part II ofthe Canadian Electrical Code.It is contemplated that Subcommittees responsible for other standards forming Part II of

15、 the Canadian ElectricalCode may recommend for them detailed requirements, which, although differing from those herein, are judged toachieve the same objective.For general information on the Standards of the Canadian Electrical Code, Part II, see the Preface of CSA StandardC22.2 No. 0, General Requi

16、rementsCanadian 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.May, 1985Note: Although the intended primary application of this Standard is stated in its S

17、cope, it is 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 rega

18、rding this 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

19、 appropriate, 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

20、 sample copy, write to CSA BusinessDevelopment Group or telephone (416) 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 t

21、heir manufacture 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 accept

22、ance by inspection 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 assum

23、e or undertake 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 proc

24、essed.Products 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 thi

25、s Standard 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

26、 frequently must be prescribed by the CSA CertificationDivision in addition to the technical requirements contained in Standards of CSA. In addition to markings specified inthe Standard the CSA Certification and Testing Division may require special cautions, markings and instructions thatare not spe

27、cified by 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 manufacture

28、r or the 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 fro

29、m the interpretation 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

30、request all 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 Record

31、s Section, CanadianStandards Association, 178 Rexdale Boulevard, Rexdale (Toronto), Ontario M9W 1R3.Copyright CSA International71. Scope1.1This Standard applies to enclosed equipment that is to be permanently field connected to line or load circuits rated 750V or less.1.2Minimum wiring space and wir

32、e bending space requirements are specified for field installed wires terminating in orpassing through enclosures or terminal boxes.1.3The requirements are considered to be the minima that would permit field wiring without damage to the wires.1.4This Standard shall form a part of and be read in conju

33、nction with all individual standards to which the requirements ofthis Standard may apply, except that, where an individual standard contains requirements that are at variance withthose of this Standard, the requirements of the individual standard shall take precedence.1.5This Standard does not apply

34、 to enclosures of equipment intended to be wired with conductors that are smaller than No.14 AWG.2. Definitions2.1The following definitions apply in this Standard:Wire bending space means a wiring space opposite field wiring terminals or any other space in which it is intended thatfield installed wi

35、res may be bent or offset.Wiring space means a space within an enclosure to accommodate field installed wires.3. Requirements3.1 General3.1.1There shall be adequate space within an enclosure for the installation and termination of all wires intended to beemployed. 3.1.2Wiring and wire bending spaces

36、 shall be smooth and free from sharp edges, burrs, or other sources of mechanicaldamage, which could damage wire insulation.3.2 Wiring Space (See Appendix A.)A wiring space shall have, clear of all obstructions, a cross sectional area of not less than 250% of the total crosssectional area of the max

37、imum number of wires intended to be installed in it, and the minimum width or depth shall benot less than shown in Table 1.3.3 Wire Bending Space at Field Wiring Terminals Including the Neutral (See Appendix A.)3.3.1Except as permitted in Clause 3.3.2, wire bending space shall, for the maximum size

38、and number of wire(s) intended, benot less than(a) as shown in Table 2; or(b) as shown in Table 3 if the wire connectors can be readily removed to facilitate making connections.Copyright CSA International83.3.2Provided the wires do not enter the enclosure through the portion of the wall opposite the

39、 field wiring terminals, the wirebending space shall be not less than shown in Table 4 for the maximum size and number of wire(s) intended if(a) after the wires enter the enclosure they are required to make only one 90 bend; or(b) the wires enter a space having a width not less than shown in Table 2

40、 for the maximum size and number of wire(s)intended, and this space opens directly into the wire bending space.In both cases the intended wiring method shall be ensured by suitably located knockouts or openings or by adiagram supplied with the equipment.3.3.3The wire bending space at a field wiring

41、terminal shall be measured to the enclosure wall opposite it, from the centre ofthe conductor opening on the face of the wire connector, in the line in which the wire leaves the connector when theconnector is at the smallest angle to the perpendicular to the enclosure wall that it can assume without

42、 defeating anyreliable means provided to prevent its turning. A connector shall not be directed at a corner or a recess in an enclosureto obtain the required bending space.3.3.4If a terminal is provided with one or more wire connectors for connecting wires in multiple, the bending space shall bemeas

43、ured from the wire opening closest to the wall of the enclosure.3.3.5If a wire is restricted by a barrier or obstruction from being bent in a single 90 or S bend between the terminal and anypermitted enclosure entrance point, the wire bending space shall be measured from the end of the barrier or ob

44、structionto the wall towards which the wire is directed, in a line perpendicular to the wall.Note: See Figure 4 of Appendix A. 3.3.6A barrier, shoulder, or the like shall be disregarded when the measurement is being made if it does not reduce theradius to which the wire must be bent.Note: See Figure

45、 5 of Appendix A.3.4 Wire Bending Space at Other Than Field TerminalsWire bending space at other than field terminals shall have a minimum dimension not less than that shown in Table 4,for the maximum size of wire intended for wires that are intended to make only one 90 bend within that space. Copyr

46、ight CSA International9Copyright CSA International 10Copyright CSA International 11Copyright CSA International 12Copyright CSA International 13Appendix AExamples of Wiring Space and Wire Bending SpaceNote: This Appendix is not a mandatory part of this Standard.The following are some examples of the

47、application of the requirements specified in this Standard. Figure 1(Below)(See Clauses 3.2 and 3.3.1.) Figure 2(Below)(See Clause 3.3.2(a).) Figure 3(Below)(See Clause 3.3.2(b).)A and BA and BA and BA and BA and BA and BLineLoadZZXXLineLoadA Y AB Y BA and BA and BA and BLineLoadYAXYBLEGEND X = wire

48、 bending space per Table 2 or 3Y = wire bending space per Table 4Z = wiring space per Table 1A = section of enclosure perimeter where line wires may enterB = section of enclosure perimeter where load wires may enterCopyright CSA International 14Enclosure wallWiresWiresBarrierBarrierTerminalsTerminalsX = Wire bending space per Table 2 or 3Figure 4 (See Clause 3.3.5.)Figure 5 (See Clause 3.3.6.)xxCopyright CSA International 15