1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories Inc.(UL). It is normative for the a
2、pplicable UL Product Certification Program(s); however, it is currently notpart of the UL Standard(s) referenced below.Product Category (CCN): DYWVStandard Number: UL 6AEdition Date: October 31, 2008Edition Number: 2Section / Paragraph Reference: Paragraph 5.3.4, 6.2 and 7.9Subject: Use of threaded
3、couplings only on conduit provided with a protectivecoating.DECISION:5.3 Protective coatings5.3.4 A protective coating shall comply with the requirements of Clause 6.2. When the conduit, elbows,and nipples are intended to be used with either set-screw or compression type couplings, they shallcomply
4、with the requirements of Clause 6.2 and be subjected to the assembly, bending, resistance, pull,and fault current tests, without removal of the protective coating, in accordance with the relevant standardfor fittings for cable and conduit as indicated in Reference Item No. 4A, Annex A. Conduit, elbo
5、ws, andnipples provided with a protective coating and marked in accordance with Clause 7.9 are not suitable foruse with these couplings and therefore do not require evaluation.6.2 Protective coatings6.2.1 A protective coating shall be subjected to the assembly, bending, resistance, pull, and fault c
6、urrenttests in accordance with Reference Item No. 4B, Annex A, with both set-screw and compression-typecouplings.7.9 Each straight length of conduit, elbow, or nipple provided with a protective coating, and not meetingthe requirements of Clause 6.2, shall be marked “Use Threaded Couplings Only”, or
7、with an equivalentwording. The conduit shall be marked at a minimum of once every 3.05 m (10 ft) and no less than onceper piece. Conduit, elbows, or nipples intended for use with fittings that have been subjected to therequired assembly, bending resistance, pull, and fault current tests without remo
8、val of the protectivecoating are not required to be so marked.Annex A (normative)A1 Normative referencesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULReferenceitem no.Clause wherereferencedUnited States Canada Mexico1 1.1 NFPA 70-2008, Natio
9、nalElectrical CodeCSA C22.1-06, CanadianElectrical Code, Part 1NOM-001-SEDE, Standardfor Electrical Installations2 1.3 UL 6 , Electrical RigidMetal Conduit SteelCAN/CSA C22.2 No. 45.1-07, Electrical Rigid MetalConduit SteelNMX-J-534-ANCE-2005 ,Electrical Rigid MetalConduit and Fittings toProtect Ele
10、ctrical Conductors3 5.1.1 ASTM B 43 ,Specification forSeamless Red BrassPipe, Standard SizesASTM B 43, Specificationfor Seamless Red BrassPipe, Standard SizesNo equivalent4 5.3.3 UL 746A , PolymericMaterials Short TermProperty Evaluations,and UL 514B , Conduit,Tubing, and CableFittingsCAN/CSA-C22.2
11、No.0.17-00 (R2004),Evaluation of Properties ofPolymeric Materials andCAN/CSA C22.2 No. 18.3-04, Conduit, Tubing, andCable FittingsNMX-J-023/1-ANCE-2000,Electrical Products OutputMetallic Boxes - Part 1 -Specifications and TestMethods and NMX-J-017-2003, Conduit, Tubing, andCable Fittings4A 5.3.4 UL
12、514B , Conduit,Tubing, and CableFittingsCAN/CSA C22.2 No. 18.3-04, Conduit, Tubing, andCable FittingsNMX-J-017-ANCE-2005,Conduit, Tubing and CableFittings - Specifications andTest Methods4B 6.2.1 UL 514B , Conduit,Tubing, and CableFittingsCAN/CSA C22.2 No. 18.3-04, Conduit, Tubing, andCable Fittings
13、NMX-J-017-ANCE-2005,Conduit, Tubing and CableFittings - Specifications andTest Methods5 5.4.1.1 ASME B1.20.1-1983(R2006), Pipe Threads,General Purpose (Inch) Revision andRedesignation of ASME/ANSI B2.1-1968ASME B1.20.1-1983(R2006), Pipe Threads,General Purpose (Inch) Revision andRedesignation of ASM
14、E/ANSI B2.1-1968NMX-J-554-ANCE-2004,Threads for Conduit andFittings6 5.4.3.1 ASME B1.20.1-1983(R2006), Pipe Threads,General Purpose (Inch) Revision andRedesignation of ASME/ANSI B2.1-1968ASME B1.20.1-1983(R2006), Pipe Threads,General Purpose (Inch) Revision andRedesignation of ASME/ANSI B2.1-1968NMX
15、-J-554-ANCE-2004,Threads for Conduit andFittings7 5.7.4 ASME B1.20.1-1983(R2006), Pipe Threads,General Purpose (Inch) Revision andRedesignation of ASME/ANSI B2.1-1968ASME B1.20.1-1983(R2006), Pipe Threads,General Purpose (Inch) Revision andRedesignation of ASME/ANSI B2.1-1968NMX-J-554-ANCE-2004,Thre
16、ads for Conduit andFittingsASME: American Society of Mechanical EngineersASTM: American Society for Testing and MaterialsNFPA: National Fire Protection AssociationRATIONALE FOR DECISION:UL 6A allows for the use of a protective coating, including a nonmetallic coating, on conduit. However, therequire
17、ments as currently written, do not address conduit used solely with threaded couplings. UL isproposing the addition of Clauses 5.3.4, 6.2, and 7.9 to address a conduit provided with a protectivecoating for use only with threaded couplings.STANDARD NUMBER: UL 6A -2-UL COPYRIGHTED MATERIAL NOT AUTHORI
18、ZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCopyright 2011 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification Requirement Decisions it may issue or that they will be
19、recognized or adoptedby anyone. Certification Requirement Decisions are the opinion of Underwriters Laboratories Inc. inpractically applying the requirements of the standard. They do not represent formal interpretations of thestandard under American National Standards Institute (ANSI) processes. UL
20、shall not be responsible toanyone for the use of or reliance upon Certification Requirement Decisions by anyone. UL shall not incurany obligation or liability for damages, including consequential damages, arising out of or in connectionwith the use or reliance upon Certification Requirement Decision
21、s. The electronic version of theCertification Requirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersSTANDARD NUMBER: UL 6A -3-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSTANDARD NUMBER: UL 6A -4-No Text on This Page
