ANSI UL 719-2015 UL Standard for Safety Nonmetallic-Sheathed Cables (Thirteenth Edition Reprint with revisions through and including March 2 2018)《非金属护套电缆安全性标准》.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 719 Nonmetallic-Sheathed CablesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER RE

2、PRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Nonmetallic-Sheathed Cables, UL 719 Thirteenth Edition, Dated September 8, 2015 SUMMARY OF TOPICS This new edition of ANSI/UL 719 was issued to incorporate the following changes: Reorganization of UL 719 The new require

3、ments are substantially in accordance with Proposal(s) on this subject dated July 3, 2015. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without p

4、rior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or si

5、milar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage e

6、ver exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fe

7、es) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future eff

8、ective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. SEPTEMBER 8, 2015 UL 719 tr1UL COPYRIGHTED MATERIAL NO

9、T AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 8, 2015 UL 719 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 8, 2015 1 UL 719 Standard for Nonmetallic-Sheathed Ca

10、bles First Edition April, 1927 Second Edition July, 1933 Third Edition September, 1937 Fourth Edition July, 1941 Fifth Edition February, 1957 Sixth Edition August, 1968 Seventh Edition June, 1974 Eighth Edition November, 1979 Ninth Edition August, 1985 Tenth Edition July, 1996 Eleventh Edition March

11、, 2002 Twelfth Edition February, 2006 Thirteenth Edition September 8, 2015 This ANSI/UL Standard for Safety consists of the Thirteenth Edition including revisions through September 8, 2015. The most recent designation of ANSI/UL 719 as an American National Standard (ANSI) occurred on September 8, 20

12、15. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. The Department of Defense (DoD) has adopted UL 719 on June 7, 1985. The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption. Comments or proposals for r

13、evisions 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 Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standar

14、d should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 719-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION

15、OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 8, 2015 NONMETALLIC-SHEATHED CABLES - UL 719 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS 1 Scope .5 2 General 5 2.1 Units of Measurement .5 2.2 Reference

16、 publications 5 3 Denitions 6 4 Construction 7 4.1 Materials 7 4.2 Types of cables 7 4.3 Conductors 7 4.4 Insulation 8 4.5 Protective sheath in type NM cable .9 4.6 Assembly 9 4.7 Overall thermoplastic jacket .10 5 Test Requirements .11 5.1 General 11 5.2 Physical properties of PVC and other materia

17、ls .11 5.3 Jacket thickness requirements 11 5.4 Separability test of cable parts .11 5.5 Continuity test requirements 11 5.6 Vertical ame .12 5.7 Vertical-tray ame test .12 5.8 Vertical-tray re-propagation and smoke-release test 12 5.9 Tray-cables sunlight-resistance test .13 5.10 Dielectric voltage

18、-withstand test 13 5.11 Tension and elongation test .13 5.12 Unwinding tests at low temperature .13 5.13 Crushing resistance test for at cable .14 5.14 Crushing resistance test for round cable 14 5.15 Abrasion resistance test of jacket on at cable .14 5.16 Pulling-though-joists test 14 5.17 Flow tes

19、t 15 5.18 Conductor separation requirements .15 5.19 Connector pull-out test requirements 16 6 Markings 16 6.1 Markings on product .16 6.2 Markings on package 19 7 Test Methods 20 7.1 Conductor separation measurement .20 7.2 Connector pullout test 21 7.3 Jacket thickness measurement 21 7.4 Preparati

20、on of specimens for physical property determination .22 7.5 Continuity testing 22 7.6 Vertical ame test .22 7.7 Vertical-tray ame test .22 7.8 Vertical-tray re-propagation and smoke-release test 22 7.9 Dielectric voltage-withstand test .23 7.10 Tension and elongation test .24 7.11 Unwinding tests at

21、 low temperature 24 7.12 Crushing resistance test for at cable .25 7.13 Crushing resistance test for round cable 27 7.14 Abrasion resistance test of jacket on at cable .27 SEPTEMBER 8, 2015 NONMETALLIC-SHEATHED CABLES - UL 719 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTR

22、IBUTION WITHOUT PERMISSION FROM UL 7.15 Pulling-through-joists test 27 7.16 Flow test .29 Tables 30 Figures .34 SEPTEMBER 8, 2015 NONMETALLIC-SHEATHED CABLES - UL 719 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1 Scope 1.1 These require

23、ments cover nonmetallic-sheathed cables containing24thermoplastic-insulated circuit conductors, with a grounding conductor, in the constructions indicated in Table 1. These cables are intended for use in accordance with Article 334 and other applicable parts of the National Electrical Code, NFPA 70.

24、 Type NMC cable is for use in dry, moist, damp, and corrosive locations, and Type NM cable is for use in normally dry locations. Both types carry the suffix letter -B to designate the use of conductors with 90C insulation. 1.2 A cable to which the designation ST1 (signifying limited smoke ) is appli

25、ed as a type-letter suffix complies with the test criteria for smoke release and for cable damage height stated in the Standard for Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables, UL 1685. 2 General 2.1 Units of Measurement 2.1.1 In addition to being st

26、ated in the inch/pound units that are customary in the USA, each of the requirements in this standard is also stated in units that make the requirement conveniently usable in countries employing the various metric systems (practical SI and customary). Equivalent although not necessarily exactly iden

27、tical results are to be expected from applying a requirement in USA or metric terms. Equipment calibrated in metric units is to be used when a requirement is applied in metric terms. 2.2 Reference publications 2.2.1 Any undated reference to a code or standard appearing in the requirements of this st

28、andard shall be interpreted as referring to the latest edition of that code or standard. UL Standards UL 83 Thermoplastic-Insulated Wires and Cables UL 514B Conduit, Tubing, and Cable Fittings UL 1581 Reference Standard for Electrical Wire, Cables, and Flexible Cords UL 1685 Standard for Vertical-Tr

29、ay Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables UL 2556 Wire and Cable Test Methods ASTM (American Society for Testing and Materials) Standards B3-01 Standard Specication for Soft or Annealed Copper Wire B8-11 Standard Specication for Concentric-Lay-Stranded Copper

30、 Conductors, Hard, Medium-Hard, or Soft SEPTEMBER 8, 2015 NONMETALLIC-SHEATHED CABLES - UL 719 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL G21-13 Standard Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi NFP

31、A (National Fire Protection Association) Publication NFPA 70 National Electric Code 3 Denitions 3.1 The following denitions apply in this Standard: 3.2 DIRECTION OF LAY the longitudinal direction, designated as left-hand (counterclockwise) or right-hand (clockwise), in which the wires of a member or

32、 units of a conductor run over the top of the member or conductor as they recede from an observer looking along the axis of the member or conductor. 3.3 EQUIPMENT-GROUNDING CONDUCTOR a conductor that is dened in the National Electrical Code and the Standard for Electrical Installations as Grounding

33、Conductor, Equipment . 3.4 GROUNDED CIRCUIT CONDUCTOR a circuit conductor that is intentionally grounded. 3.5 LENGTH OF LAY the length along the longitudinal axis of the conductor or assembly for any component to complete one revolution. 3.6 NYLON a thermoplastic compound whose main characteristic c

34、onstituent is polyamide. 3.7 POLYPROPYLENE a thermoplastic compound whose characteristic constituent is polypropylene, the crystalline copolymer of ethylene and propylene. 3.8 PVC a thermoplastic compound whose characteristic constituent is polyvinyl chloride or a copolymer of vinyl chloride and vin

35、yl acetate. 3.9 ROOM TEMPERATURE 25 10C (77 18F) 3.10 THERMOPLASTIC a polymeric material that repeatedly can be softened by heating and hardened by cooling through a temperature range characteristic of the material, and that in the softened state can be shaped through the application of force. SEPTE

36、MBER 8, 2015 NONMETALLIC-SHEATHED CABLES - UL 719 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Construction 4.1 Materials 4.1.1 Only materials that are acceptable for the particular use shall be employed in a cable. 4.2 Types of cables

37、 4.2.1 A cable shall be one of the following types and shall comply in all respects with the applicable requirements for construction details, test performance, and marking. 4.2.2 Type NMC cable is required to comply with a ame test and to be resistant to moisture, fungi, and corrosion and also to h

38、ave some degree of inherent protection against mechanical abuse. 4.2.3 Type NM cable is required to comply with a ame test, to be resistant to moisture, and to have some degree of inherent protection against mechanical abuse. 4.2.4 Each of the materials used for the insulation, spacers, llers, jacke

39、t, and other nonmetallic parts of a Type NMC cable shall be resistant to fungi, moisture, and corrosion. 4.2.5 Polypropylene, PVC, and glass are known to be resistant to fungi and hence, are acceptable in this respect without exposure tests. Tests to determine the degree of resistance to fungi are t

40、o be made as indicated in the American Society for Testing and Materials (ASTM) the Standard for Practice for Determining Resistance of Synthetic Polymeric Materials to Fungi, ASTM G21, on materials not known to have the requisite property. Cotton, paper, jute, hemp, and the like are not acceptable

41、in the construction of Type NMC cable. 4.2.6 The requirement in 4.2.4 that the insulation used in the construction of a Type NMC cable be resistant to moisture is intended to indicate that the insulation be acceptable for use where it is only occasionally and temporarily exposed to dampness or wetne

42、ss. It is not intended that the insulation be for use in wet locations. 4.3 Conductors 4.3.1 Only soft-annealed copper, copper-clad aluminum, or an acceptable aluminum alloy shall be used for the conductor or conductors in a cable. Soft-annealed copper shall comply with the Standard Specication for

43、Soft or Annealed Copper Wire, ASTM B3. Solid aluminum conductors in size 128AWG shall comply with the requirements for aluminum-wire stock (aluminum-alloy conductor material). All other aluminum conductors shall comply with the Requirements for Aluminum Conductors of an 8000 Series Alloy , Section i

44、n the Reference Standard for Electrical Wires, Cables, and Flexible Cords, UL 1581. Copper-clad aluminum conductors shall comply with the Requirements for Copper-Clad Aluminum Conductors , Section in UL 1581. In a given cable, all conductors shall be of the same metal. 4.3.2 A copper circuit conduct

45、or shall not be smaller than 14 AWG and shall not be larger than 2 AWG. An aluminum or copper-clad aluminum circuit conductor shall not be smaller than 12 AWG and shall not be larger than 2 AWG. SEPTEMBER 8, 2015 NONMETALLIC-SHEATHED CABLES - UL 719 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHE

46、R REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.3.3 An 8 AWG or larger circuit conductor and a 6 AWG or larger grounding conductor shall be stranded. Conductors shall comply with the requirements in the Conductors Section of the Standard for Thermoplastic-Insulated Wires and Cables, UL 8

47、3 except as modied in this section. 4.3.4 A joint in a solid conductor or in one of the individual wires of a stranded conductor shall be made in a workmanlike manner and shall not increase the diameter of the solid conductor, the individual wire strand, or the overall stranded conductor. A joint sh

48、all not be made in a stranded conductor as a whole but shall be made by separately joining each individual wire. A joint shall be made only before coverings, if any, are applied to an insulated conductor. The insulation applied to such joints shall be equivalent to that removed and, if of PVC, shall

49、 have insulation-resistance (K = 4000 at 15.6C or 60.0F) and dielectric-withstand characteristics complying with the requirements for the thermoplastic-insulated wire. 4.4 Insulation 4.4.1 Both before and after assembly into nished cable, the insulation employed on the circuit conductors shall comply with (a) or (b): a) THHN Construction Jacketed insulation for a Type NM or NMC cable shall have a nylon or similar jacket and shall comply