1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 913 Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and III, Division 1, Hazardous (Classied) LocationsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPROD
2、UCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and III, Division 1, Hazardous (Classie
3、d) Locations, UL 913 Eighth Edition, Dated December 6, 2013 Summary of Topics This revision to ANSI/UL 913 is being issued to include the following changes in requirements: Revisions to 7.1.2 and deletion of Table 7.1 per 2014 NEC Clarifying the issue of temperature classication for Class II and Cla
4、ss III intrinsically safe apparatus for 9.3, 9.4 and 10.1 Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date
5、 note indicating the date of publication or the date on which the changed requirement becomes effective. The revised requirements are substantially in accordance with Proposal(s) on this subject dated May 1, 2015 and August 28, 2015. All rights reserved. No part of this publication may be reproduced
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10、ICAL PANEL FOR UL 913 HAS DETERMINED THAT AS OF SEPTEMBER 1, 2018, EDITION 5 AND EDITION 7 OF UL 913 WILL BE WITHDRAWN AND MAY BE USED TO DETERMINE A PRODUCTS COMPLIANCE UNTIL THIS DATE. The following table summarizes the active editions of UL 913, and lists the established withdrawal date for each
11、edition of this standard. OCTOBER 16, 2015 UL 913 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Standard Edition Status of Edition (Active/Withdrawn) Established Withdrawal Date for Each Standard Edition 5 Active September 1, 2018 7 Act
12、ive September 1, 2018 8 Active Active until further notice Note: These editions may be used to determine compliance for new or modied products until the dates shown. When the Standards Technical Panel has determined that all existing products shall be upgraded and assessed for compliance with a new
13、standard edition, the edition number will be noted with an “*” in this table. OCTOBER 16, 2015 UL 913 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 6, 2013 (Title Page Reprinted: October 16, 2015) 1 UL 913 Standard for Intrinsi
14、cally Safe Apparatus and Associated Apparatus for Use in Class I, II, III, Division 1, Hazardous (Classied) Locations The First edition was titled Standard for Intrinsically Safe Electrical Equipment for Use in Hazardous Locations. The Second edition was titled Standard for Intrinsically Safe Electr
15、ical Circuits and Apparatus for Use in Hazardous Locations and its Associated Apparatus. First Edition November, 1971 Second Edition January, 1976 Third Edition July, 1979 Fourth Edition July, 1988 Fifth Edition February, 1997 Sixth Edition August, 2002 Seventh Edition July, 2006 Eighth Edition Dece
16、mber 6, 2013 This ANSI/UL Standard for Safety consists of the Eighth Edition including revisions through October 16, 2015. The most recent designation of ANSI/UL 913 as an American National Standard (ANSI) occurred on October 16, 2015. ANSI approval for a standard does not include the Cover Page, Tr
17、ansmittal Pages, Title Page, or effective date information. 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 Standards Development System (CSDS) at http:/. ULs Standar
18、ds for Safety are copyrighted by UL. Neither a printed nor electronic 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. COPYRIGHT 2015 UNDERWRITERS LABORATORIE
19、S INC. ANSI/UL 913-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 6, 2013 UL 913 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUC
20、TION 1 Scope .4 2 Undated References 4 3 Unit of Measurement .5 4 Components .5 5 General 5 6 Zone Equivalency .6 6.1 General 6 6.2 Zone 20, Group IIIA 6 6.3 Zone 20, Group IIIB 6 6.4 Zone 20, Group IIIC 7 7 Apparatus For Class II And Class III Locations .7 7.1 General 7 7.2 Dust-tight enclosures 8
21、8 Dust-Tight Enclosure Test .8 9 Dust Blanketing Temperature Test .9 MARKING 10 General 10 11 Zone Equivalency Markings .12 11.1 Zone 20, Group IIIA 12 11.2 Zone 20, Group IIIB 13 11.3 Zone 20, Group IIIC 13 APPENDIX A EXPLANATORY MATERIAL A1 Scope .A1 A6 Apparatus For Class II And Class III Locatio
22、ns A1 APPENDIX B Reference Standards.B1 DECEMBER 6, 2013 UL 913 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION NOTICE: An asterisk (*) following the number or letter designating a paragraph indicates explanatory material on th
23、at paragraph can be found in Appendix A. 1 Scope 1.1 * These requirements apply to apparatus or parts of apparatus for installation and use in Class I, II, or III, Division 1 hazardous (classied) locations in accordance with the requirements of the National Electrical Code, NFPA 70. 1.2 These requir
24、ements also apply to apparatus or parts of apparatus for installation and use in Zone 20, Groups IIIA, IIIB, and IIIC hazardous (classied) locations in accordance with the requirements of the National Electrical Code, NFPA 70. 1.3 * These requirements also cover associated apparatus located outside
25、of the hazardous (classied) location whose design and construction may inuence the intrinsic safety of an electrical circuit within the hazardous (classied) location. 1.4 These requirements are based on consideration of ignition in locations classied as a hazardous location by the presence of ammabl
26、e or combustible material under normal atmospheric conditions. 1.5 * For the purposes of this standard, normal atmospheric conditions are considered to be: a) An ambient temperature of 40C (104F); b) An oxygen concentration not greater than 21 percent by volume; and c) A pressure of one atmosphere.
27、1.6 This standard does not cover apparatus based on high voltage electrostatic principles such as electrostatic paint spraying. 2 Undated References 2.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition
28、of that code or standard. DECEMBER 6, 2013 UL 913 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Unit of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate informat
29、ion. 4 Components 4.1 Except as indicated in 4.2, a component of a product covered by this standard shall comply with the requirements for that component. See Appendix B for a list of standards covering components generally used in the products covered by this standard. 4.2 A component is not requir
30、ed to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 4.3 A component shall be used in accordance with its rating establishe
31、d for the intended conditions of use. 4.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under t
32、hose specic conditions. 5 General 5.1 The purpose of this standard is to provide requirements for the construction and testing of electrical apparatus, or parts of such apparatus, having circuits that are not capable of causing ignition in Division 1 Hazardous (Classied) Locations as dened in Articl
33、e 500 of the National Electrical Code, ANSI/NFPA 70. 5.2 This standard is not to be considered an instruction manual for untrained persons. It is intended to promote uniformity of practice among those skilled in the eld of intrinsic safety. 5.3 Except where modied by the requirements of this standar
34、d, intrinsically safe and associated apparatus shall comply with the applicable requirements for unclassied (ordinary) locations. 5.4 Enclosures for associated apparatus shall conform to the requirements of the location in which they are intended to be installed. 5.5 Apparatus for Class I, Division
35、1, Groups A and/or B locations, shall comply with all the applicable requirements in UL 60079-0:2013 and UL 60079-11:2013 for Group IIC, level of protection ia . Exception: Marking of the apparatus shall meet the requirements of Section 10. DECEMBER 6, 2013 UL 913 5UL COPYRIGHTED MATERIAL NOT AUTHOR
36、IZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.6 Apparatus for Class I, Division 1, Group C locations, shall comply with all the applicable requirements in UL 60079-0:2013 and UL 60079-11:2013 for Group IIB, level of protection ia . Exception: Marking of the apparatus sha
37、ll meet the requirements of Section 10. 5.7 Apparatus for Class I, Division 1, Group D locations, shall comply with all the applicable requirements in UL 60079-0:2013 and UL 60079-11:2013 for Group IIA, level of protection ia . Exception: Marking of the apparatus shall meet the requirements of Secti
38、on 10. 6 Zone Equivalency 6.1 General 6.1.1 The following Zone equivalency details address Class II, Division 1 and Class III intrinsically safe and associated apparatus for installation and use in Zone 20 hazardous (classied) locations in accordance with the requirements of the National Electrical
39、Code, NFPA 70. 6.1.2 Similar Zone equivalency details for Class I, Division 1 intrinsically safe and associated apparatus for installation and use in Class I, Zone 0 hazardous (classied) locations is not included. Based on the reference to UL 60079-11 and UL 60079-0 in this standard, Class I, Divisi
40、on 1 intrinsically safe and associated apparatus that complies with the requirements in this standard can additionally or alternatively be marked in accordance with UL 60079-11 and UL 60079-0. 6.2 Zone 20, Group IIIA 6.2.1 Intrinsically safe and associated apparatus intended to be marked in accordan
41、ce with 11.1 shall comply with all the applicable requirements for Class III hazardous (classied) locations as applicable. 6.3 Zone 20, Group IIIB 6.3.1 Intrinsically safe and associated apparatus intended to be marked in accordance with 11.2 shall comply with all the applicable requirements for Cla
42、ss II, Group F, Group G or both Groups F and G hazardous (classied) locations as applicable. DECEMBER 6, 2013 UL 913 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.4 Zone 20, Group IIIC 6.4.1 Intrinsically safe and associated apparatus i
43、ntended to be marked in accordance with 11.3 shall comply with all the applicable requirements for Class II, Group E hazardous (classied) locations as applicable. 7 Apparatus For Class II And Class III Locations 7.1 General 7.1.1 Intrinsically safe apparatus and associated wiring for Class II and Cl
44、ass III locations shall comply with the requirements in Sections15i nthis standard, as applicable and shall also comply with the requirements of 7.1.2 and either 7.1.3 or 7.1.4. 7.1.2 * The temperature of exposed surfaces of apparatus shall be determined when tested according to the procedures descr
45、ibed in 9.1 9.3. For this requirement, exposed means exposed to the ammable or combustible atmosphere or material. Parts within a dust-tight enclosure are not considered exposed; the outside surfaces of the enclosure are exposed. Exception: Temperatures of small components under fault conditions sha
46、ll be permitted to exceed these limits if it is shown by test that such higher temperatures will not result in ignition or charring. Table 7.1 Maximum apparatus surface temperatures Table 7.1 deleted 7.1.3 Except as specied in 7.1.4, intrinsically safe apparatus for use in Class II, Groups E, F, and
47、 G locations shall be enclosed in a dust-tight enclosure that complies with the requirements in 7.2.1 7.2.3. In addition, the apparatus shall also comply with the spark ignition requirements for Class I, Group D or for methane. See 5.7. 7.1.4 * Intrinsically safe apparatus for use in Class II, Group
48、s E, F, and G locations not enclosed in a dust-tight enclosure complying with the requirements in 7.2.1 7.2.3 shall comply with the spark ignition requirements specied in 7.1.3. In this case, it is to be assumed that all spacings do not comply with the separation distance requirements specied in UL
49、60079-11:2013 and that all connections between live or grounded parts and conductors are in the most unfavorable condition. The number of such connections is unlimited. Exception: Intrinsically safe apparatus for use in Class II, Group E locations need not be enclosed in a dust-tight enclosure complying with the requirements in 7.2.1 7.2.3 when the apparatus complies with the UL 60079-11:2013 requirements for total immersion, or uncontrolled dust layer thickness. OCTOBER 1
