UL 943-2016 UL Standard for Safety Ground-Fault Circuit-Interrupters (Fifth Edition Reprint with revisions through and including February 23 2018).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 943 Ground-Fault Circuit-Interrupters STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT

2、 AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Ground-Fault Circuit-Interrupters, UL 943 Fifth Edition, Dated May 17, 2016 Summary of Topics This new edition of the Standard for Safety for Ground-Fault Circuit-Interrupters, ANSI/UL 943, inc

3、ludes the following changes in requirements: Yellow Load Label Removal - GFCI Receptacles GFCI Auto Monitoring Function Instruction Sheet Change for Weather Resistant Receptacles (WR) Clause 6.30 Auto-Monitoring Tests The new/revised requirements are substantially in accordance with Proposal(s) on t

4、his subject dated January 8, 2016. 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 prior permission of UL. UL provides this Standard as is w

5、ithout 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 similar damages, including loss of prots, lost savings, lo

6、ss 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 ever exceed the price paid for this Standard, regardless

7、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 fees) resulting from any error or deviation introduced whi

8、le purchaser is storing an electronic Standard on the purchasers computer system. MAY 17, 2016 UL 943 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 17, 2016 UL 943 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR F

9、URTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Association of Standardization and Certication NMX-J-520-ANCE Third Edition CSA Group CSA C22.2 No. 144.1-16 Second Edition Underwriters Laboratories Inc. UL 943 Fifth Edition Ground-Fault Circuit-Interrupters May 17, 2016 ANSI/UL 943-20

10、16UL COPYRIGHTED 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 Unde

11、rwriters Laboratories 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 Grou

12、p and UL will 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 re

13、served in favor of ANCE ISBN 978-1-77139-993-7 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 imp

14、rovement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquirescsagroup.org and include Proposal for change in the subject line: Standard designation (number); relevant clause, table, and/or gure number; wording of the propos

15、ed change; and rationale for the change. To purchase CSA Group Standards and related publications, visit CSA Groups Online Store at shop.csa.ca or call toll-free 1-800-463-6727 or 416-747-4044. Copyright 2016 Underwriters Laboratories Inc. ULs Standards for Safety are copyrighted by UL. Neither a pr

16、inted 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. This ANSI/UL Standard for Safety consists of the Fifth edition. The most recent designat

17、ion of ANSI/UL 943 as an American National Standard (ANSI) occurred on May 17, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page (front and back), or the Preface. The Department of Defense (DoD) has adopted UL 943 on November 30, 1994. The publication

18、of revised pages or a new edition of this Standard will not invalidate the DoD adoption. 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

19、(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 DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .6 1 Scope .8 2 Normative References .8 3 Denitions 8 4 General .10 4.1

20、 Components 10 4.2 Units of measurement 11 5 Construction .11 5.1 All types 11 5.2 Resistance to corrosion 12 5.3 Grounding and bonding 12 5.4 Enclosure and housing .13 5.5 Provision for connection to permanent wiring systems .13 5.6 Insulation .14 5.7 Accessibility of energized parts 14 5.8 Interna

21、l wiring .15 5.9 Field wiring .15 5.10 Power-supply cord 16 5.11 Receptacles .19 5.12 Spacings 20 5.13 Alternative spacings clearances and creepage distances 22 5.14 Operating mechanism .23 5.15 Supervisory circuit 24 5.16 Auto-monitoring function 24 6 Tests .24 6.1 General 24 6.2 Polymeric enclosur

22、es 28 6.3 Enclosure and housing performance .29 6.4 Representative devices 30 6.5 Leakage current test .31 6.6 Voltage surge test .33 6.7 High-resistance ground fault 38 6.8 Resistance to false tripping test .46 6.9 Immunity to conducted disturbances, induced by RF elds .48 6.10 Normal temperature t

23、est 48 6.11 Dielectric voltage withstand test 49 6.12 Overload and motor starting test .51 6.13 Low-resistance ground fault test 52 6.14 Endurance test .53 6.15 Abnormal operation test .54 6.16 Surge current test 58 6.17 Abnormal overvoltage tests 59 6.18 Extra-low-resistance ground faults test 63 6

24、.19 Short circuit test 65 6.20 Dust test 65 6.21 Corrosion test 66 6.22 Visual inspection test .67 6.23 Reverse line-load miswire test .67 6.24 Reverse line-load miswire test - repeated .68 MAY 17, 2016 NMX-J-520-ANCE CSA C22.2 NO. 144.1-16 UL 943 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER

25、REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.25 Supplemental voltage surge immunity test .68 6.26 Operating mechanism test 69 6.27 Permanently connected GFCI end of life test 70 6.28 GFCI receptacle temperature tests .70 6.29 Mechanical endurance test 76 6.30 Spill test .77 6.31 Auto-mo

26、nitoring function tests 77 7 Markings 79 7.1 Permanence of marking 79 7.2 Marking 79 7.3 Permanently connected ground-fault circuit-interrupters 80 7.4 Portable ground-fault circuit-interrupters 81 8 Installation Instructions .82 8.1 General 82 8.2 Permanently connected ground-fault circuit-interrup

27、ters 83 SUPPLEMENT SA - OPTIONAL 10 KA SHORT CIRCUIT CURRENT TEST FOR OUTLET-BOX TYPE GROUND-FAULT CIRCUIT-INTERRUPTERS INTRODUCTION SA1 Scope .85 PERFORMANCE SA2 General 85 MARKINGS SA3 General 85 Annex A (Normative) Reference Standards A1 Reference Standards .86 Annex B (Informative) French Transl

28、ations and Markings B1 French Translations and Markings 88 Annex C (Informative) Spanish Translations and Markings C1 Spanish Translations and Markings .89 Annex D (Informative) Reference Publications D1 Reference Publications 90 MAY 17, 2016 NMX-J-520-ANCE CSA C22.2 NO. 144.1-16 UL 943 4UL COPYRIGH

29、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Annex E (Normative in Canada and the United States; informative in Mexico) Installation Instructions Conguration Drawings E1 Installation Instructions Conguration Drawings .94 MAY 17, 2016 NMX-J-520-ANCE

30、CSA C22.2 NO. 144.1-16 UL 943 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the harmonized ANCE, CSA Group, and UL Standard for Ground-Fault Circuit-Interrupters. It is the third edition of NMX-J-520-ANCE, the second editi

31、on of CSA C22.2 No. 144.1, and the fth edition of UL 943. This edition of NMX-J-520-ANCE supersedes the previous edition published on February 1, 2006. This edition of CSA C22.2 No. 144.1 supersedes the previous edition published in February 2006. This edition of UL 943 supersedes the previous editi

32、on published on February 1, 2006, and revised on June 29, 2012. 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 CANENA Technical Harmonization Subcommittee 23E, Grou

33、nd-Fault Circuit-Interrupters, are gratefully acknowledged. This standard is considered suitable for use for conformity assessment within the stated scope of the standard. The present Mexican standard was developed by the CT 23 Accesorios Electricos from the Comite de Normalizacion de la Asociacion

34、de Normalizacion y Certicacion, A.C., CONANCE, with the collaboration of the ground fault circuit interrupters manufacturers and users. This Standard was reviewed by the CSA Subcommittee on Ground-Fault Circuit-Interrupters, under the jurisdiction of the CSA Technical Committee on Industrial Product

35、s 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 National Standards Institute (ANSI) as an American National Standard. Application of Standard Where referen

36、ce is made to a specic number of samples to be tested, the specied number is to be considered a minimum quantity. Note: Although the intended primary application of this standard is stated in its scope, it is important to note that it remains the responsibility of the users of the standard to judge

37、its suitability for their particular purpose. Level of harmonization This Standard uses the IEC format but is not based on, nor shall it be considered equivalent to, an IEC Standard. This Standard is published as an identical Standard for ANCE, CSA Group, and UL. An identical Standard is a Standard

38、that is exactly the same in technical content except for national differences resulting from conicts in codes and governmental regulations. Presentation is word for word except for editorial changes. Reasons for differences from IEC This Standard provides requirements for ground-fault circuit-interr

39、upters for use in accordance with the electrical installation codes of Canada, Mexico, and the United States. At present there is no IEC Standard for ground-fault circuit-interrupters for use in accordance with these codes. Therefore, this Standard does not employ any IEC Standard for base requireme

40、nts. MAY 17, 2016 NMX-J-520-ANCE CSA C22.2 NO. 144.1-16 UL 943 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Interpretations The interpretation by the standards development organization of an identical or equivalent Standard is based on t

41、he 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 possible to each of the standards development or

42、ganizations to more accurately reect the intent. MAY 17, 2016 NMX-J-520-ANCE CSA C22.2 NO. 144.1-16 UL 943 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1 Scope 1.1 This Standard applies to Class A, single- and three-phase, ground-fault c

43、ircuit-interrupters intended for protection of personnel, for use only in grounded neutral systems in accordance with the National Electrical Code (NEC), ANSI/NFPA 70, the Canadian Electrical Code, Part I, and Electrical Installations (Use), NOM-001-SEDE. These devices are intended for use on altern

44、ating current (AC) circuits of 120 V, 208Y/120 V, 120/240 V, 127 V, or 220Y/127 V, 60 Hz circuits. Note: In Canada, the text “intended for protection of personnel” is excluded. 1.2 These requirements do not cover ground-fault circuit-interrupters intended for use in circuits served by a transformer

45、having windings wholly insulated from each other. 1.3 This Standard applies to all Class A ground-fault circuit-interrupters. These Class A GFCIs are permitted to be integrated into other devices, in which case, besides complying with this Standard, these devices are to comply with the corresponding

46、 applicable Standard for the device in question. 1.4 This Standard includes minimum requirements for the function, construction, performance, and markings of ground-fault circuit-interrupters included in the scope. 1.5 This Standard is intended to cover only Class A GFCI devices. 1.6 This Standard a

47、lso covers GFCIs of the self contained type that are intended for installation in a counter, such as would be suitable for installation in a kitchen or bathroom counter top. 2 Normative References 2.1 Any normative reference to a code or Standard appearing in the requirements of this Standard shall

48、be interpreted as referring to the latest edition of that code or Standard. See Annex A. 2.2 When a reference is made to another code or Standard, the product shall comply with the installation code or Standard of the country or countries in which the product is intended to be used. 2.3 For products

49、 intended for use in Canada general requirements are given in CSA Standard C22.2 No. 0, Denitions and General Requirements Canadian Electrical Code, Part II. 3 Denitions For the purposes of this Standard, the following denitions apply: 3.1 ACCESSIBLE PART A part so located that it can be contacted by a person, either directly or by means of a probe or tool. 3.2 AUTOMATIC RECLOSURE Denotes the act of a ground-fault circuit-interrupter resetti