1、C22.2 No. 227.3-15Mechanical protection tubing (MPT) and fittingsLegal 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 together voluntee
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16、r call toll-free 1-800-463-6727 or 416-747-4044.Copyright 2015 Underwriters Laboratories Inc.ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standardshould be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regardingthose
17、 Standards shall remain the sole and exclusive property of UL.This ANSI/UL Standard for Safety consists of the Second Edition including revisions through January9, 2015. The most recent designation of ANSI/UL 1696 as an American National Standard (ANSI)occurred on January 9, 2015. ANSI approval for
18、a standard does not include the Cover Page,Transmittal Pages, Title Page (front and back), or the Preface.Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time.Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative StandardsDeve
19、lopment System (CSDS) at http:/.To purchase UL Standards, visit Comm 2000 at http:/m- call toll-free 1-888-853-3503.CONTENTSPreface .41 Scope .62 Normative References .63 Definitions 74 General Requirements .85 Construction 85.1 Nonmetallic MPT .85.2 Composite MPT 95.3 Dimensions 95.4 Internal surfa
20、ce 95.5 Fittings and Clamps .96 Tests 96.1 Test Specimens 96.2 Conditioning 106.3 Identification of materials 106.4 Vertical flame 106.5 Tension 126.6 Flexibility 136.7 Cold impact .136.8 Weather resistance 136.9 Flame test in cable trays FT4 (optional) 146.10 Pull-out .146.11 Heat aging 156.12 Liqu
21、id tightness 156.13 Electrical resistance test 166.14 Ferrous metal components of MPT fittings .167 Marking .167.1 MPT .167.2 Fittings and clamps 17Tables 18Figures .19JANUARY 9, 2015 CSA C22.2 NO. 227.3-15 UL 1696 3PrefaceThis is the harmonized CSA Group and UL standard for mechanical protection tu
22、bing (MPT) and fittings.It is the fourth edition of CSA C22.2 No. 227.3, and the second edition of UL 1696. This edition of CSAC22.2 No. 227.3 supersedes the previous edition of CSA C22.2 No. 227.3 published on March 18, 2005.This edition of UL 1696 supersedes the first edition of UL 1696 published
23、on March 18, 2005. Previously,requirements for MPT were found in the common CSA and UL Standard for Nonmetallic MechanicalProtection Tubing (NMPT) and UL 1696A, Outline of Investigation for Mechanical Protection Tubing.This harmonized standard was prepared by CSA Group and Underwriters Laboratories
24、Inc. (UL). Theefforts and support of the conduit manufacturing industry and the Technical Harmonization Committee23A, NMPT Working Group, of the Council on the Harmonization of Electrotechnical Standards for theNations of the Americas (CANENA), are gratefully acknowledged.This standard is considered
25、 suitable for use for conformity assessment within the stated scope of thestandard.This standard was reviewed by the CSA Integrated Committee on Nonmetallic Conduit, Tubing, andFittings, under the jurisdiction of the CSA Technical Committee on Wiring Products and the CSA StrategicSteering Committee
26、on Requirements for Electrical Safety, and has been formally approved by the CSATechnical Committee.This standard has been approved by the American National Standards Institute as an American NationalStandard.Application of StandardWhere reference is made to a specific number of samples to be tested
27、, the specified number is to beconsidered a minimum quantity.Note: Although the intended primary application of this standard is stated in its scope, it is important to note thatit remains the responsibility of the users of the standard to judge its suitability for their particular purpose.Level of
28、HarmonizationThis standard uses an IEC format, but is not based on, nor is it to be considered an IEC standard. Thisstandard is published as an equivalent standard for CSA Group and UL. An equivalent standard is astandard that is substantially the same in technical content, except as follows: Techni
29、cal deviations areallowed for codes and governmental regulations and those recognized as being in accordance withNAFTA Article 905, for example, because of fundamental, climatic, geographical, technological orinfrastructural factors, scientific justification, or the level of protection that the coun
30、try considersappropriate. Presentation is to be word for word except for editorial changes.Reasons for Differences from IECThe Technical Harmonization Committee determined the safe use of nonmetallic mechanical protectiontubing and fittings is dependent on the design and performance of the raceway a
31、nd cable systems withwhich they are intended to be installed. Significant investigation is required to assess safety and systemcompatibility issues that may lead to harmonization of traditional North American nonmetallic tubing andfittings with those presently addressed in the known IEC standards. T
32、he THC agreed such futureinvestigation might be facilitated by completion of harmonization of the North American standards formechanical protection tubing and fittings.JANUARY 9, 2015CSA C22.2 NO. 227.3-15 UL 16964InterpretationsThe interpretation by the standards development organization of an iden
33、tical or equivalent standard isbased on the literal text to determine compliance with the standard in accordance with the proceduralrules of the standards development organization. If more than one interpretation of the literal text has beenidentified, a revision is to be proposed as soon as possibl
34、e to each of the standards developmentorganizations to more accurately reflect the intent.CSA Group Effective DateThe effective date for CSA Group will be announced through CSA Informs or a CSA Group CertificationNotice.UL Effective DateAs of April 10, 2015, all products Listed or Recognized by UL m
35、ust comply with the requirements in thisstandard. Between January 9. 2015 and April 10, 2015, new product submittals to UL may be evaluatedunder all requirements in this standard or, if requested in writing, evaluated under presently effectiverequirements only. The presently effective requirements a
36、re contained in the first edition of UL 1696.A UL effective date is established by Underwriters Laboratories Inc. and is not part of the ANSI approvedstandard.JANUARY 9, 2015 CSA C22.2 NO. 227.3-15 UL 1696 5Mechanical Protection Tubing (MPT) and Fittings1 Scope1.1 This Standard applies to nonmetalli
37、c or composite mechanical protection tubing (MPT), andnonmetallic, composite or metallic fittings, and clamps used for the support, routing and mechanicalprotection of conductors, wires, and cables. The MPT, fittings, and clamps are intended to be used tointerconnect separate component assemblies or
38、 consoles of electrical devices, such as robotics, medicalor X-ray equipment. The mechanical protection afforded the internal wiring contained within the tubing isconsidered equivalent to the protection provided by a type SJT flexible cord. Mechanical protection tubing(MPT) may be submitted without
39、fittings, clamps, etc.1.2 The MPT, fittings, and clamps covered by this Standard are not intended for use as a wiring methodin accordance with NFPA 70, National Electrical Code (NEC) and CSA C22.1-12, Canadian ElectricalCode (CE Code), Part I.1.3 This Standard does not include standard trade sizes.
40、The MPT, fittings, and clamps from differentmanufacturers are not interchangeable unless the combination of MPT, fittings, and clamps aredetermined to be in accordance with this Standard.2 Normative References2.1 Where reference is made to other publications, such reference shall be considered to re
41、fer to thelatest edition and all amendments published to that edition up to the time when this Standard wasapproved.ASTM*StandardsASTM D 2444Standard Test Method for Determination of the Impact Resistance of Thermoplastic Pipe and Fittings byMeans of a Tup (Falling Weight)ASTM D 5025Standard Specifi
42、cation for Laboratory Burner Used for Small-Scale Burning Tests on Plastic MaterialsASTM D 5207Standard Practice for Calibration of 20 and 125 mm Test Flames for Small-Scale Burning Tests on PlasticMaterialsASTM D 5423Standard Specification for Forced Convection Laboratory Ovens for Evaluation of El
43、ectrical InsulationASTM G 155Standard Practice for Operating Xenon Arc Light Apparatus for Exposure for Nonmetallic MaterialsCSA Group StandardsC22.1-12Canadian Electrical Code (CE Code), Part ICAN/CSA-C22.2 No. 0-10General requirements Canadian Electrical Code, Part IIJANUARY 9, 2015CSA C22.2 NO. 2
44、27.3-15 UL 16966CAN/CSA-C22.2 No. 0.17Evaluation of Properties of Polymeric MaterialsCSA C22.2 No. 211.0-03 (R2013)General Requirements and Methods of Testing for Nonmetallic ConduitCSA C22.2 No. 18.3-12Conduit, Tubing, and Cable FittingsNational Research Council CanadaNational Building Code of Cana
45、da, 2010UL StandardsUL 514BConduit, Tubing, and Cable FittingsUL 746AStandard for Polymeric Materials Short Term Property EvaluationsUL 746BPolymeric Materials Long Term Property EvaluationsUL 94Test for Flammability of Plastic Materials for Parts in Devices and Appliances* American Society for Test
46、ing and Materials.3 Definitions3.1 The following definitions apply in this Standard:3.2 Clamp An external device used to secure, but not support, MPT.3.3 Connector A fitting intended to terminate, secure, and support MPT to an enclosure, equipmentor similar device.3.4 Coupling A fitting intended to
47、securely connect two lengths of MPT.3.5 Fitting A device, such as a coupling or connector, that provides a means for securing MPT to anenclosure, splicing between lengths of MPT, or securing MPT to equipment that maintains the supportand protection of the MPT.3.6 Composite Fitting A fitting construc
48、ted of both metallic, other than screws and the like, andnonmetallic materials.Note: The presence of screws, nuts, washers and unexposed metallic sleeves for screws should not be the solemeans to change the classification of a fitting from nonmetallic to composite. These components generallyare not
49、likely to become energized in the event of a conductor fault so they are not subject to the test in 6.13 anda protective coating is not measured in accordance with 6.14.2.3.7 Metallic Fitting A fitting constructed completely of metallic materials.JANUARY 9, 2015 CSA C22.2 NO. 227.3-15 UL 1696 73.8 Nonmetallic Fitting A f
