1、UL 1838ISBN 0-7629-0845-9Low Voltage LandscapeLighting SystemsCopyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 09/03/2006 00:51:37 MDTNo reproduction or networking permitted without license from IHS-,-,-
2、Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 09/03/2006 00:51:37 MDTNo reproduction or networking permitted without license from IHS-,-,-Underwriters Laboratories Inc. (UL)333 Pfingsten RoadNorthbroo
3、k, IL 60062-2096UL Standard for Safety for Low Voltage Landscape Lighting Systems, UL 1838Third Edition, Dated January 13, 2003The new requirements are substantially in accordance with ULs Bulletin(s) on this subject dated October15, 2001 and September 17, 2002. The bulletin(s) is now obsolete and m
4、ay be discarded.Summary of TopicsThis new edition is a periodic re-issuance to ensure that ULs Standards remain up-to-date withregard to format and editorial issues such as renumbering, repagination, correction of editorialerrors, correction of cross-references and updating titles for referenced Sta
5、ndards. This newedition also encompasses revisions to clarify the scope of the standard and makes significantrevision to the technical content of the standard.The following table lists the future effective dates with the corresponding reference.Future Effective Dates ReferencesJanuary 13, 2005 Parag
6、raphs 18.6, 22.2.1, 22.2.2, 24.4.2, 25.1.1, 25.1.6, 28.2.2,Section 35, Section 36, 37.3.4, 43.2, 43.3, 44.1, 50.16, 50.18 50.20, 52.3, Table 52.1, 54.1, 55.3, Figure 55.1, 55.4, 59.4,59.5, Section 60, Section 61, 62.1.1, 62.4.1, and 64.4As indicated on the title page (page 1), this UL Standard for S
7、afety is an American National Standard.Attention is directed to the note on the title page of this Standard outlining the procedures to be followedto retain the approved text of this ANSI/UL Standard.The master for this Standard at ULs Northbrook Office is the official document insofar as it relates
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10、e reproduced, stored in a retrieval system, ortransmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwisewithout prior permission of UL.Revisions of UL Standards for Safety are issued from time to time. A UL Standard for Safety is currentonly if it incorporates
11、 the most recently adopted revisions.UL provides this Standard as is without warranty of any kind, either expressed or implied, including butnot limited to, the implied warranties of merchantability or fitness for any purpose.JANUARY 13, 2003 UL 1838 tr1Copyright Underwriters Laboratories Inc. Provi
12、ded by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 09/03/2006 00:51:37 MDTNo reproduction or networking permitted without license from IHS-,-,-In no event will UL be liable for any special, incidental, consequential, indirect or similar damages,includ
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22、 page or pages beingviewed for their own fair and/or practical internal use.The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,and/or other elements of the Standard having future effective dates as indicated in the note following theaffected i
23、tem. The prior text for requirements that have been revised and that have a future effective dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.New product submittals made prior to a specified future effective date will be judged under all of therequirements in
24、this Standard including those requirements with a specified future effective date, unlessthe applicant specifically requests that the product be judged under the current requirements. However, ifthe applicant elects this option, it should be noted that compliance with all the requirements in thisSta
25、ndard will be required as a condition of continued Listing and Follow-Up Services after the effectivedate, and understanding of this should be signified in writing.Copyright 2003 Underwriters Laboratories Inc.JANUARY 13, 2003 UL 1838tr2Copyright Underwriters Laboratories Inc. Provided by IHS under l
26、icense with ULLicensee=North Carolina State University/5618801100 Not for Resale, 09/03/2006 00:51:37 MDTNo reproduction or networking permitted without license from IHS-,-,-This Standard consists of pages dated as shown in the following checklist:Page Date1-80 .January 13, 2003A1-A2.January 13, 200
27、3CRG1-CRG4.January 13, 2003SR1-SR4 .January 13, 2003JANUARY 13, 2003 UL 1838 tr3Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 09/03/2006 00:51:37 MDTNo reproduction or networking permitted without lic
28、ense from IHS-,-,-JANUARY 13, 2003 UL 1838tr4No Text on This PageCopyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 09/03/2006 00:51:37 MDTNo reproduction or networking permitted without license from IHS-,
29、-,-JANUARY 13, 20031UL 1838Standard for Low Voltage Landscape Lighting SystemsFirst Edition March, 1994Second Edition March, 1996Third EditionJanuary 13, 2003The most recent designation of ANSI/UL 1838 as an American National Standardoccurred on October 29, 2002.This ANSI/UL Standard for Safety, whi
30、ch consists of the Third edition, is undercontinuous maintenance, whereby each revision is ANSI approved uponpublication. Comments or proposals for revisions on any part of the Standard maybe submitted to UL at any time. Written comments are to be sent to UL-RTPStandards Department, PO Box 13995, Re
31、search Triangle Park, NC 27709-3995.An effective date included as a note immediately following certain requirementsis one established by Underwriters Laboratories Inc.Revisions of this Standard will be made by issuing revised or additional pagesbearing their date of issue. A UL Standard is current o
32、nly if it incorporates themost recently adopted revisions, all of which are itemized on the transmittal noticethat accompanies the latest set of revised requirements.ISBN 0-7629-0845-9COPYRIGHT 1994, 2003 UNDERWRITERS LABORATORIES INC.ANSI/UL 1838-2002Copyright Underwriters Laboratories Inc. Provide
33、d by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 09/03/2006 00:51:37 MDTNo reproduction or networking permitted without license from IHS-,-,-JANUARY 13, 2003LOW VOLTAGE LANDSCAPE LIGHTING SYSTEMS - UL 18382No Text on This PageCopyright Underwriters La
34、boratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 09/03/2006 00:51:37 MDTNo reproduction or networking permitted without license from IHS-,-,-CONTENTSFOREWORD .8INTRODUCTION1 Scope .92 Glossary .93 Components .124 Units of Measur
35、ement .125 Undated References .136 Organization and Application .13PART 1 POWER UNITSMECHANICAL CONSTRUCTION7 General .148 Enclosures .159 Metal Thickness .159.1 Sheet metal .159.2 Extrusions .169.3 Cast metal .1610 Corrosion Protection .1611 Open Holes .1812 Drain Holes .2013 Openings .2114 Gaskets
36、 and Bushings .21ELECTRICAL CONSTRUCTION15 General .2115.1 Class 2 transformers .2115.2 Wiring devices .2115.3 Internal wiring connections .2115.4 Insulation .2215.5 Prevention of wire damage .2216 Device and Conductor Ratings .2316.1 Voltage .2316.2 Current .2317 Switches and Relays .2318 Convenien
37、ce Receptacles .2419 Wiring and Conductors .2420 Protective Devices .2521 Printed Wiring Boards .2522 Separation of Circuits .2522.1 General .2522.2 Isolation .2623 Electrical Spacings .2724 Power Supply Connections .2924.1 Supply connection systems .29JANUARY 13, 2003 LOW VOLTAGE LANDSCAPE LIGHTING
38、 SYSTEMS - UL 1838 3Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=North Carolina State University/5618801100 Not for Resale, 09/03/2006 00:51:37 MDTNo reproduction or networking permitted without license from IHS-,-,-24.2 Conduit connection provision .3024.3 Power supply connection means .3124.4 Power supply cord .3124.5 Secondary connections .3225 Grounding and Bonding .3225.1 Gr
