ANSI UL 98-2016 UL Standard for Safety Enclosed and Dead-Front Switches (Fourteenth Edition).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 98 Enclosed and Dead-Front Switches STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT A

2、UTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Enclosed and Dead-Front Switches, UL 98 Fourteenth Edition, Dated February 12, 2016 Summary of Topics This new edition of ANSI/UL 98 is being issued to incorporate multiple substantive and editor

3、ial changes. As noted in the Commitment for Amendments statement located on the back side of the title page, UL, CSA, and ANCE are committed to updating this harmonized standard jointly. The new/revised requirements are substantially in accordance with Proposal(s) on this subject dated February 20,

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8、ectronic Standard on the purchasers computer system. FEBRUARY 12, 2016 UL 98 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 12, 2016 UL 98 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION O

9、R DISTRIBUTION WITHOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-162-ANCE-2016 Fourth Edition CSA Group CSA-C22.2 No. 4-16 Eighth Edition Underwriters Laboratories Inc. UL 98 Fourteenth Edition Enclosed and Dead-Front Switches February 12, 2016 ANSI/UL 98-2016UL COPYRIG

10、HTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Commitment for Amendments This standard is issued jointly by the Association of Standardization and Certication (ANCE), the Canadian Standards Association (operating as “CSA Group”), and Underwriters Lab

11、oratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to ANCE, CSA Group, or UL at anytime. Revisions to this standard will be made only after processing according to the standards development procedures of ANCE, CSA Group, and UL. CSA Group and UL wil

12、l issue revisions to this standard by means of a new edition or revised or additional pages bearing their date of issue. ANCE will incorporate the same revisions into a new edition of the standard bearing the same date of issue as the CSA Group and UL pages. Copyright 2016 ANCE Rights reserved in fa

13、vor of ANCE. ISBN 978-1-77139-928-9 2016 CSA Group All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher. This Standard is subject to review ve years from the date of publication, and suggestions for its improvement wi

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16、lectronic copy of a Standard 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. This ANSI/UL Standard for Safety consists of the Fourteenth edition. The most recent designation of

17、 ANSI/UL 98 as an American National Standard (ANSI) occurred on February 12, 2016. ANSI approval for 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 a

18、ny time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. To purchase UL Standards, visit Comm 2000 at http:/m- or call toll-free 1-888-853-3503.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBU

19、TION WITHOUT PERMISSION FROM UL CONTENTS Preface .5 1 Scope .6 2 Normative References .7 3 Components 7 4 Units of Measurement .8 5 Denitions 8 6 Construction .11 6.1 General 11 6.2 Enclosure 12 6.3 Operating mechanism 13 6.4 Accessibility of live parts .14 6.5 Electrical insulation material 14 6.6

20、Spacings .15 6.7 Current-carrying parts 21 6.8 Fusing .26 6.9 Field conversion .27 6.10 Enclosed switch wiring and bending space 29 6.11 Disconnecting means of the grounded service conductor 33 6.12 Provision for grounding .33 6.13 Provision for bonding .35 6.14 Electrically tripped switches 36 6.15

21、 Additional service equipment requirements for Canada .36 7 Test methods 37 7.1 General 37 7.2 Heating test 39 7.3 Overload test .42 7.4 Endurance test 46 7.5 Dielectric voltage-withstand test .49 7.6 Clamped joint test 49 7.7 Close-open test .50 7.8 Short-circuit withstand test 51 7.9 Low-level die

22、lectric voltage-withstand test 56 7.10 Short-circuit closing test .56 7.11 Strength of insulating base and support test .56 7.12 Electrically tripped switches 57 7.13 Mold stress relief test .59 7.14 Insulating barriers test 59 8 Ratings .59 8.1 General 59 8.2 Current .60 8.3 Voltage 60 8.4 Horsepow

23、er or kilowatts 62 8.5 Short-circuit current 64 9 Marking .64 9.1 General 64 9.2 All switches .65 9.3 Electrically tripped switches .72 FEBRUARY 12, 2016 NMX-J-162-ANCE-2016 CSA-C22.2 NO. 4-16 UL 98 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION F

24、ROM UL SUPPLEMENT SA - Enclosed and Deadfront Switches Intended for Marine Use SA1 Scope .77 SA2 Denitions 77 SA3 General 78 SA4 Construction 78 SA4.1 Enclosure protection against corrosion 78 SA4.2 Current-carrying parts .79 SA4.3 Insulating material 79 5 Performance 79 SA5.1 Vibration test .79 SA5

25、.2 Shock test .80 SA5.3 Ignition protection test .80 SA5.4 Dripproof enclosure test .81 SA5.5 Watertight enclosure test 81 SA6 Markings .81 ANNEX A (normative) ANNEX B (informative) ANNEX C (normative) ANNEX D (informative) ANNEX E (informative) E1 Instrumentation .89 E2 Galvanometer Calibration 89

26、E3 Alternating Current Circuits 10,000 A and Less .90 E4 Alternating Current Circuits Greater than 10,000 A .91 E5 Recovery Voltage AC .93 E6 Direct Current Circuits .94 ANNEX F (informative) FEBRUARY 12, 2016 NMX-J-162-ANCE-2016 CSA-C22.2 NO. 4-16 UL 98 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR F

27、URTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the harmonized ANCE, CSA Group, and UL standard for Enclosed and Dead-Front Switches.I ti s the Fourth edition of NMX-J-162-ANCE, the Eighth edition of CSA C22.2 No. 4, and the Fourteenth edition of UL 98. This harmonized

28、 standard has been jointly issued February 12, 2016. This harmonized standard was prepared by the Association of Standardization and Certication (ANCE), CSA Group, and Underwriters Laboratories Inc., (UL). The efforts and support of the Technical Harmonization Committee for Enclosed Switches, of the

29、 Council on the Harmonization of Electrotechnical Standards of the Nations of the Americas (CANENA), are gratefully acknowledged. This standard is considered suitable for use for conformity assessment within the stated scope of the standard. This standard was reviewed by the CSA Subcommittee on Encl

30、osed and Dead-Front Switches, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee. This standard has been approved by the American Na

31、tional Standards Institute (ANSI) as an American National Standard. Where reference is made to a specic number of samples to be tested, the specied number shall be considered a minimum quantity. Note: Although the intended primary application of this standard is stated in its scope, it is important

32、to note that it remains the responsibility of the users of the standard to judge its suitability for their particular purpose. Level of harmonization This standard uses the IEC format but is not based on, nor is it considered equivalent to, an IEC standard. This standard is published as an equivalen

33、t standard for ANCE, CSA Group, and UL. An equivalent standard is a standard that is substantially the same in technical content, except as follows: Technical national differences are allowed for codes and governmental regulations as well as those recognized as being in accordance with NAFTA Article

34、 905, for example, because of fundamental climatic, geographical, technological, or infrastructural factors, scientic justication, or the level of protection that the country considers appropriate. Presentation is word for word except for editorial changes. Reasons for differences from IEC The THC d

35、etermined the safe use of enclosed and dead-front switches is dependent on the design and performance of the products in relation to the North American Electrical Codes with which they are intended to be installed. Interpretations The interpretation by the standards development organization of an id

36、entical or equivalent standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text has been identied, a revision is to be proposed as soon as poss

37、ible to each of the standards development organizations to more accurately reect the intent. FEBRUARY 12, 2016 NMX-J-162-ANCE-2016 CSA-C22.2 NO. 4-16 UL 98 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1 Scope 1.1 These requirements cover

38、 individually enclosed air switches, rated 4000 A or less at 600 V or less, having all current-carrying parts enclosed, manually operable by means of external handles, and intended to be employed in accordance with the national installation codes listed in Annex A, Ref. No. 1. 1.2 As used in this St

39、andard, the term switch is intended to mean an enclosed switch or deadfront switch unless specically stated otherwise. 1.3 These requirements also cover deadfront switches that have all current-carrying parts enclosed when mounted in an enclosed panelboard, deadfront switchboard, or the like. These

40、switches are manually operable by means of external handles and are intended to be employed in accordance with the national installation codes listed in Annex A, Ref. No. 1. 1.4 These requirements cover enclosed switches with or without provision for fuses suitable for use as branch circuit, feeder,

41、 and service overcurrent protection. 1.5 The following fuses are deemed suitable for use as branch circuit, feeder, and service overcurrent protection: a) Cartridge Fuses (Ref. Annex B, Low-Voltage Fuses Parts 1 10, 12 and 15), b) Plug Fuses (Ref. Annex B, Low-Voltage Fuses Parts 1 and 11), and c) S

42、pecial Purposes Fuses marked as meeting the performance specications of a specic Class Fuse. 1.6 These requirements cover enclosed switches intended for general use and having ampere ratings, with or without horsepower or kilowatt ratings, and enclosed switches intended for motor-circuit use only an

43、d having horsepower or kilowatt ratings but no general-use ampere ratings. 1.7 These requirements cover double-throw switches intended for use in optional standby systems (see Annex A, Ref. No. 1). 1.8 These requirements cover fused electrically tripped switches rated over 600 A and rated 600 A or l

44、ess employing Class J, R or T fuses. 1.9 These requirements also cover electrically tripped switches that have been investigated to determine their acceptability for ground-fault protection when combined with ground-fault sensing and relaying equipment as follows: a) Switches for use with Class I gr

45、ound-fault sensing and relaying equipment include those that are capable of interrupting 12 times their rated current or that have integral means to prevent disconnecting as levels of fault current exceeding the contact interrupting capability of the switch. b) Switches for use with Class II ground-

46、fault sensing and relaying equipment are capable of interrupting 10 times their rated current and are for use in ground-fault protection systems in which means to prevent disconnecting at levels of fault current exceeding the contact interrupting capability of the switch are incorporated within the

47、ground-fault sensing and relaying equipment when combined with Class I and II ground-fault sensing and relaying equipment. FEBRUARY 12, 2016 NMX-J-162-ANCE-2016 CSA-C22.2 NO. 4-16 UL 98 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1.10 T

48、hese requirements do not cover: a) Common forms of snap switches, b) Switches having features intended primarily for the starting and protection of motors, including the switches arranged to shunt out fuses during the starting of motors, c) Switches provided with automatic trips for opening them and

49、 constructed to afford overload protection without other circuit breakers or fuses, d) Devices in which the pulling of fuses or the removal of a detachable pullout member is designed to accomplish a switching operation, or e) Circuit breakers, molded-case switches, magnetic-only circuit interrupters, instantaneous-only circuit breakers, and supplementary protectors. 2 Normative References 2.1 Where reference is made to any Standards, such reference shall b