1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1786 Direct Plug-In NightlightsUL 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 Direct Plug-In Nightlights, UL 1786 Fourth Edition, Dated December 17, 2014 Summary of Topics This new edition of ANSI/UL 1786 includes the following changes in requirements: 1. Revise polarization requirements for nigh
3、tlights provided with switches 2. Add reference to UL 8750 requirements for isolated output LED drivers 3. Revise paragraph 11.5.1 to include cadmium sulde photocells 4. Add ballast construction requirements to correlate with UL 935 5. Add requirements for nightlights with vessels containing liquid
4、6. Revise paragraph 1.3 to exclude direct plug in devices such as plasma light 7. Propose additional testing to determine suitability of mechanism and contacts of devices that rotate to accommodate receptacle orientation (add 7.7.4, 11.11, and 11.12) The new and revised requirements are substantiall
5、y in accordance with Proposal(s) on this subject dated August 22, 2014. 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
6、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 similar damages, incl
7、uding 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 ever exceed the pric
8、e 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 fees) resulting from
9、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 effective dates as ind
10、icated in the preface. 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. The following table lists the future effective dates with the corresponding reference. DECEMBER 17
11、, 2014 UL 1786 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Future Effective Date Reference August 21, 2017 Clauses 6.3, 7.1.12, and 10.7.4 DECEMBER 17, 2014 UL 1786 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
12、 DISTRIBUTION WITHOUT PERMISSION FROM UL CSA Group CSA C22.2 No. 256-14 Second Edition Underwriters Laboratories Inc. UL 1786 Fourth Edition Direct Plug-In Nightlights December 17, 2014 ANSI/UL 1786-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSIO
13、N FROM UL Commitment for Amendments This standard is issued jointly by the Canadian Standards Association (operating as “CSA Group”) and Underwriters Laboratories Inc. (UL). Comments or proposals for revisions on any part of the standard may be submitted to CSA Group or UL at any time. Revisions to
14、this standard will be made only after processing according to the standards development procedures of CSA Group and UL. CSA Group and UL will issue revisions to this standard by means of a new edition or revised or additional pages bearing their date of issue. ISBN 978-177139-710-0 2014 CSA Group Al
15、l 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 periodic review, and suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, plea
16、se 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 proposed change; and rationale for the change. To purchase CSA Group Standards and related public
17、ations, visit CSA Groups Online Store at shop.csa.ca or call toll-free 1-800-463-6727 or 416-747-4004. Copyright 2014 Underwriters Laboratories Inc. ULs Standards 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
18、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 Fourth edition. The most recent designation of ANSI/UL 1786 as an American National Standard (ANSI) occurred on December 17, 2014.
19、 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 any time. Proposals should be submitted via a Proposal Request in ULs On-Line Colla
20、borative 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 DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS Preface .5 1 Scope .7 2 Reference Publica
21、tions 7 3 Components 9 4 Units of Measurement .9 5 Application of Requirements .9 6 Denitions 10 7 Construction .11 7.1 Enclosures General 11 7.2 Polymeric materials for enclosure and electrical insulation 12 7.3 Enclosure assembly methods .13 7.4 Corrosion protection .13 7.5 Current-carrying parts
22、13 7.6 Plug blades .14 7.7 Plug face dimensions 14 7.8 Polarization and identication .14 7.9 Switching mechanisms .15 7.10 Lampholder 15 7.11 Wiring and terminal connections .15 7.12 Internal wiring 16 7.13 Spacing of conductive parts .17 7.14 Grounding and bonding .18 7.15 Maximum tipping moment .1
23、8 7.16 Electroluminescent panels .18 7.17 Incandescent lamps 19 7.18 LED light sources 19 7.19 Receptacle 19 7.20 Ballasts .20 7.21 Vessels containing a liquid 20 8 General Tests .20 8.1 General 20 8.2 Accessibility of live parts .21 8.3 Dielectric voltage-withstand .21 8.4 Plug blades accessibility
24、 .22 9 Normal Operation Tests 22 9.1 Temperature 22 9.2 Lampholder and lamp base accessibility .23 10 Component Tests .23 10.1 Switch mechanism .23 10.2 Plug blade secureness test 25 10.3 Folded blade compression test .26 10.4 Mold stress-relief distortion test 26 10.5 Lamp cavity separation test 26
25、 10.6 Pull test .27 10.7 Enclosure impact test .27 11 Abnormal Tests .27 11.1 Blanketing test .27 11.2 Overlamping test .28 11.3 Limited short-circuit test .29 DECEMBER 17, 2014 CSA C22.2 NO. 256-14 UL 1786 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERM
26、ISSION FROM UL 11.4 Overvoltage test .29 11.5 Component breakdown test .29 11.6 Voltage surge test 30 11.7 Humidity conditioning test .31 11.8 Leakage-current test 31 11.9 Grounding continuity test 33 11.10 Crush test 34 11.11 Torque test .34 11.12 Rotational endurance test 34 12 Factory Production
27、Tests 34 12.1 Dielectric voltage-withstand test 34 12.2 Additional factory production tests in Canada 36 13 Marking 36 Annex A (Normative) Standards for components Annex B (CAN) (Normative) Grounding and bonding of electrical equipment B.1 General .56 B.2 Impedance 56 B.3 Impedance Test .56 ANNEX C
28、(CAN) (Normative) Printed circuit-board requirements C.1 Application 57 C.2 Special Terminology 57 C.3 General .57 C.4 Printed Circuit-Board Coatings Tests .58 C.4.1 Dielectric strength .58 C.4.2 Adhesion .59 C.4.3 Abrasion resistance test apparatus 59 C.4.4 Insulation Resistance Test Voltage 60 C.4
29、.5 Fault conditions test .61 C.5 Bond Strength of Printed-Wiring Boards 61 C.5.1 General 61 C.5.2 Test procedure 62 Annex D (CAN) (Normative) Factory Tests for Canada D.1 Grounding continuity .63 D.2 Separation 63 D.3 Candelabra lamp devices .63 D.4 Test records .64 Annex E (CAN) (Informative) Frenc
30、h translations and markings DECEMBER 17, 2014 CSA C22.2 NO. 256-14 UL 1786 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Preface This is the common CSA Group and UL Standard for Direct Plug-In Nightlights. It is the second edition of CSA
31、C22.2 No. 256 and the fourth edition of UL 1786. This edition of CSA C22.2 No. 256 supersedes the previous edition published in 2005. This edition of UL 1786 supersedes the previous editions published in 1995, 1988, and 2005. This common Standard was prepared by the CSA Group and Underwriters Labora
32、tories Inc. (UL). The efforts and support of the CANENA Technical Harmonization Committee are gratefully acknowledged. This Standard was reviewed by the CSA Subcommittee on Lighting Products, under the jurisdiction of the CSA Technical Committee on Consumer and Commercial Products and the CSA Steeri
33、ng 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) for publication as an American National Standard. A UL Standard is current only if it incorporates th
34、e most recently adopted revisions, all of which are itemized on the transmittal notice that accompanies the latest set of revised requirements. Where reference is made to a specic number of samples to be tested, the specied number is considered to be a minimum quantity. Note: Although the intended p
35、rimary 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 its suitability for their particular purpose. Level of harmonization This Standard uses the IEC format but is not based on, nor is it to be con
36、sidered equivalent to, an IEC Standard. This Standard is published as an equivalent Standard for 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 regula
37、tions as well as those recognized as being in accordance with NAFTA Article 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 wo
38、rd except for editorial changes. Reasons for differences from IEC There is not an IEC Standard that is equivalent to the requirements contained in this Standard. Interpretations The interpretation by the standards development organization of an identical or equivalent Standard is based on the litera
39、l 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 organizatio
40、ns to more accurately reect the intent. CSA Group Effective Date The effective date for CSA Group will be announced through CSA Informs or a CSA Group Certication Notice. DECEMBER 17, 2014 CSA C22.2 NO. 256-14 UL 1786 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION W
41、ITHOUT PERMISSION FROM UL UL Effective Date As of December 17, 2014, all products Listed or Recognized by UL must comply with the requirements in this standard except for the following: Clauses 6.3, 7.1.12, and 10.7.4 are effective August 21, 2017. A UL effective date is one established by Underwrit
42、ers Laboratories Inc. and is not part of the ANSI approved Standard. DECEMBER 17, 2014 CSA C22.2 NO. 256-14 UL 1786 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 1 Scope 1.1 This Standard applies to direct plug-in nightlights not exceedin
43、g 10 W input, for indoor use only, in non-hazardous locations and intended to be used in accordance with the Canadian Electrical Code, Part I, CSA C22.1, and the National Electrical Code, ANSI/NFPA 70. Light source types include incandescent candelabra base lamps, non-replaceable lamps, uorescent, n
44、eon, or light-emitting diode (LED) type or electroluminescent panels. 1.2 These requirements cover direct plug in nightlights for insertion into a parallel slot receptacle rated 125 volts maximum. 1.3 These requirements do not cover: (a) cord-connected luminaires; (b) nightlights with more than one
45、receptacle; (c) direct plug-in devices with other primary functions, such as room deodorizers, insect repellers, or rechargeable ashlights; or (d) direct plug-in devices utilizing plasma light. 2 Reference Publications 2.1 For undated references to Standards, such reference shall be considered to re
46、fer to the latest edition and all revisions to that edition up to the time when this Standard was approved. For dated references to Standards, such reference shall be considered to refer to the dated edition and all revisions published to that edition up to the time the Standard was approved. 2.2 Pr
47、oducts covered by this Standard shall comply with the reference installation codes and Standards as appropriate for the country where the product is to be used. When the product is intended for use in more than one country, the product shall comply with the installation codes and Standards for all c
48、ountries where it is intended to be used. A list of reference publications is provided below. CSA Group C22.1-12 Canadian Electrical Code, Part I C22.2 No. 0.4-04 (R2013) Bonding of Electrical Equipment CAN/CSA-C22.2 No. 0.17-00 (R2013) Evaluation of Properties of Polymeric Materials C22.2 No. 42-10
49、 General Use Receptacles, Attachment Plugs, and Similar Wiring Devices CAN/CSA C22.2 No. 60065-03 (R2012) Audio, Video, and Similar Electronic Apparatus Safety Requirements DECEMBER 17, 2014 CSA C22.2 NO. 256-14 UL 1786 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL (Underwriters Laboratories Inc) UL 498 Attachment Plugs and Receptacles UL 498A Current Taps and Adapters UL 746C Polymeric Materials Use
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