CSA C22 2 NO 56-2013 Flexible metal conduit and liquid-tight flexible metal conduit (Sixth Edition).pdf

1、C22.2 No. 56-13Flexible metal conduit and liquid-tight flexible metal conduitLegal Notice for StandardsCanadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approved by the Standards Council of Canada. This process brings toget

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18、s of this Legal Notice.Standards Update ServiceC22.2 No. 56-13December 2013Title: Flexible metal conduit and liquid-tight flexible metal conduitTo register for e-mail notification about any updates to this publication go to shop.csa.ca click on CSA Update ServiceThe List ID that you will need to reg

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20、. No part of this publication may be reproduced to any form whatsoever without the prior permission of the publisher.Published in December 2013 by CSA Group A not-for-profit private sector organization 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6 To purchase standards and relat

21、ed publications, visit our Online Store at shop.csa.caor call toll-free 1-800-463-6727 or 416-747-4044.TMA trade-mar k of the Canadian S tandards Association, operating as “CSA Group”Flexible metal conduit and liquid- tight flexible metal conduitC22.2 No. 56-13C22.2 No. 56-13Flexible metal conduit a

22、nd liquid-tight flexible metal conduitDecember 2013 2013 CSA Group 1ContentsTechnical Committee on Wiring Products 3Subcommittee on Metal Conduit and Tubing 5Preface 61 Scope 72 Reference publications 73 Definitions 84 General requirements 85 Construction 85.1 Strip 85.1.1 Material 85.1.2 Thickness

23、95.1.3 Splices 95.2 Conduit 95.2.1 Interior surface 95.2.2 Internal diameter 95.2.3 External diameter 95.3 Thermoplastic jacket on liquid-tight flexible metal conduit 95.3.1 Material 95.3.2 Thickness 95.3.3 Diameter over jacket 96 Marking 106.1 Marking on conduits 106.1.1 Manufacturers identificatio

24、n 106.1.2 Aluminum conduit 106.1.3 Letters and symbols 106.1.4 Type designation 106.1.5 Temperature rating 106.1.6 Low temperature rating 106.1.7 Flame test marking 106.1.8 Oil immersion test marking 106.1.9 Marking method and interval 116.1.10 Direct burial stiffness test marking 116.2 Marking on c

25、oils, reels, or cartons 117 Tests 117.1 Thermoplastic jacket on liquid-tight flexible metal conduit 117.1.1 Physical properties 117.1.2 Deformation test 117.2 Finished conduit 12C22.2 No. 56-13Flexible metal conduit and liquid-tight flexible metal conduitDecember 2013 2013 CSA Group 27.2.1 Tension 1

26、27.2.2 Protective coating on steel conduit 137.2.3 Flexibility Flexible metal conduit 137.2.4 Flexibility Liquid-tight flexible metal conduit 137.2.5 Flame tests 137.2.6 Cold impact test Liquid-tight flexible metal conduit 147.2.7 Pinhole test Liquid-tight flexible metal conduit 157.2.8 Compatibilit

27、y with connectors 157.2.9 Direct burial stiffness Liquid-tight flexible metal conduit 15C22.2 No. 56-13Flexible metal conduit and liquid-tight flexible metal conduitDecember 2013 2013 CSA Group 3Technical Committee on Wiring ProductsK.L. Rodel Hubbell Canada LP, Pickering, OntarioRepresenting Produc

28、er InterestChairP. Desilets Leviton Manufacturing of Canada Limited, Pointe-Claire, QubecRepresenting Producer InterestVice-ChairW.J. Bryans Electro-Federation Canada, Toronto, OntarioAssociateW.J. Burr Burr and Associates, Campbell River, British ColumbiaAssociateC. Davis Electro Cables Incorporate

29、d, Trenton, OntarioRepresenting Producer InterestS.W. Douglas International Association of Electrical Inspectors, Toronto, OntarioRepresenting General InterestD. Drysdale Nexans Canada Inc, Milton, OntarioRepresenting Producer InterestS.P. Hawkins Shawflex A Division of ShawCor Ltd., Toronto, Ontari

30、oAssociateR.J. Kelly Government of Nunavut-Dept of Community b) provide an explanation of circumstances surrounding the actual field condition; andc) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the issue.Committee interpretations are processed i

31、n accordance with the CSA Directives and guidelines governing standardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.5) This Standard is subject to review five years from the date of publication, and suggestions for its improvement will be referred t

32、o the appropriate committee. To submit a proposal for change, please send the following information to inquiriescsagroup.org and include “Proposal for change” in the subject line:a) Standard designation (number);b) relevant clause, table, and/or figure number;c) wording of the proposed change; andd)

33、 rationale for the change.Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are published in CSAs periodical Info Update, which is available on the CSA Web site at www.csa.ca.C22.2 No. 56-13Flexible metal conduit and liquid-tig

34、ht flexible metal conduitDecember 2013 2013 CSA Group 7C22.2 No. 56-13Flexible metal conduit and liquid-tight flexible metal conduit1 Scope1.1 This Standard applies to flexible metal conduit and liquid-tight flexible metal conduit, trade sizes 12 (3/8) to 103 (4), excluding 14 (7/16), intended for u

35、se as a metal raceway for the installation of conductors in accordance with the Canadian Electrical Code, Part I. In addition, this Standard applies to special purpose flexible metal conduit, trade sizes 10 (5/16) and 14 (7/16), intended for other applications requiring the conductors to be enclosed

36、 in a flexible metal raceway.1.2 Liquid-tight flexible metal conduit covered by this Standard is provided with an overall thermoplastic jacket that is recognized for use at a maximum temperature of 60 C, 75 C, or 105 C.Note: For conduit sizes in this Standard, the metric trade designator is given fi

37、rst, with the trade size in inches following in parentheses.1.3 The values given in SI (metric) units are the standard. The values given in parentheses are for information only.1.4 In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in or

38、der to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the standard. Notes accompanying clauses do not include requirements or alternative requir

39、ements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (nonmandatory)

40、to define their application.2 Reference publicationsThis Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto.C22.2 No. 56-13Flexible metal conduit and liquid-tight flexible metal conduitD

41、ecember 2013 2013 CSA Group 8CSA GroupC22.1-12Canadian Electrical Code, Part ICAN/CSA-C22.2 No. 0-10General Requirements Canadian Electrical Code, Part IIC22.2 No. 0.3-09Test methods for electrical wires and cablesC22.2 No. 211.0-03 (R2013)General requirements and methods of testing for nonmetallic

42、conduitASTM InternationalD2412-11Standard Test Method for Determination of External Loading Characteristics of Plastic Pipe by Parallel- Plate LoadingNational Research Council CanadaNational Building Code of Canada, 20103 DefinitionsThe following definitions shall apply in this Standard:Flexible met

43、al conduit a conduit of metallic material that can be easily bent without the use of tools.Liquid-tight flexible metal conduit a flexible metal conduit having an outer liquid-tight jacket.Thermoplastic polymeric material that can be repeatedly softened by heating and hardened by cooling and that in

44、the softened state can be shaped through the application of force.4 General requirementsGeneral requirements applicable to this Standard are given in CAN/CSA-C22.2 No. 0.5 Construction5.1 Strip5.1.1 MaterialLiquid-tight flexible metal conduit shall be fabricated from either bronze or zinc-coated ste

45、el strip or from strip cut from acceptable zinc-coated sheet steel (with no additional zinc-coating operation). Flexible metal conduit shall be fabricated from either aluminum or zinc-coated steel strip. The strip material shall have a uniform width and thickness throughout its entire length.C22.2 N

46、o. 56-13Flexible metal conduit and liquid-tight flexible metal conduitDecember 2013 2013 CSA Group 95.1.2 ThicknessThe thickness at any point of the strip material used for the various trade sizes of liquid-tight flexible metal conduit and flexible metal conduit shall be not less than the values giv

47、en in Table 1 when measured before forming with the apparatus and according to the method in Clause 4.6 of CSA C22.2 No. 0.3.5.1.3 SplicesSplices in steel or aluminum strips shall not materially increase the thickness or diameter of the finished conduit or lessen its mechanical strength.5.2 Conduit5

48、.2.1 Interior surface5.2.1.1 The interior surface of the conduit shall be free from burrs and sharp edges that might cause abrasion of the coverings on conductors.5.2.1.2 The examination of the interior surface of the conduit shall be made by looking through a short specimen of the finished conduit

49、(first from one end and then from the other) at a suitable light source of sufficient intensity to allow the interior surface to be examined.5.2.2 Internal diameterThe minimum internal diameter of the various trade sizes of liquid-tight flexible metal conduit and flexible metal conduit shall be as specified in Table 2 when determined by means of metal plug gauges having diameters as specified in Table 2.5.2.3 External diameterThe maximum external diameter of flexible metal conduit shall be not larger than the values specified in Table 3 when