【UL标准】UL 1838 Low Voltage Landscape Lighting Systems.doc

UL 1838Low Voltage LandscapeLighting SystemsNOVEMBER 19, 2009 UL 1838tr1UL Standard for Safety for Low Voltage Landscape Lighting Systems, UL 1838Third Edition, Dated January 13, 2003Summary of TopicsThese revisions to ANSI/UL 1838 are being issued to address universal upkeep of UL Standards for Safety. These revisions are considered to be non-substantive and not subject to ULs STP process.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 note indicating the date of publication or the date on which the changed requirement becomes effective.All rights reserved. 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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that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.tr2NOVEMBER 19, 2009 UL 1838No Text on This PageJANUARY 13, 2003(Title Page Reprinted: November 19, 2009)1UL 1838ANSI/UL 1838-2009Standard for Low Voltage Landscape Lighting SystemsFirst Edition March, 1994Second Edition March, 1996Third EditionJanuary 13, 2003This ANSI/UL Standard for Safety consists of the Third edition including revisions through November 19, 2009.The most recent designation of ANSI/UL 1838 as an American National Standard (ANSI) occurred on August 18, 2009. ANSI approval for a standard does not include the Cover Page, Transmittal 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. 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All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL.COPYRIGHT © 2009 UNDERWRITERS LABORATORIES INC.2LOW VOLTAGE LANDSCAPE LIGHTING SYSTEMS - UL 1838JANUARY 18, 2008No Text on This PageJANUARY 18, 2008LOW VOLTAGE LANDSCAPE LIGHTING SYSTEMS - UL 18383CONTENTSINTRODUCTION1 Scope . .92 Glossary . .102A Electric Shock . .143 Components . .14C4 Units of Measurement . .14C5 Undated References . .14C6 Organization and Application . .14CPART 1 POWER UNITS MECHANICAL CONSTRUCTION7 General . .14D8 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 and Bushings . .21ELECTRICAL CONSTRUCTION15 General . .2115.1 Class 2 Circuits Within Power Unit . .2115.2 Wiring devices . .2215.3 Internal wiring connections . .2215.4 Insulation . .2215.5 Prevention of wire damage . .22A16 Device and Conductor Ratings . .2316.1 Voltage . .2316.2 Current . .2317 Switches and Relays . .2318 Convenience Receptacles . .2419 Wiring and Conductors . .2420 Protective Devices . .2521 Printed Wiring Boards . .2522 Separation of Circuits . .2522.1 General . .2522.2 Separation of Conductors . .2522.3 Output circuit isolation . .2623 Electrical Spacings . .2724 Power Supply and Output Circuit Connections . .2924.1 Power supply connection method . .294LOW VOLTAGE LANDSCAPE LIGHTING SYSTEMS - UL 1838AUGUST 7, 200724.2 Power supply conduit connection and conductor connection provisions . .2924.3 Power supply cord . .3124.4 Output circuit connection provisions . .3224.5 Deleted August 7, 2007 . .3325 Grounding and Bonding . .3325.1 Grounding . .3325.2 Bonding . .34A26 Water Shields . .35PERFORMANCE27 Test Parameters . .3528 Input and Output Tests . .3628.1 Input test . .3628.2 Maximum output test . .3629 Overload Test . .3630 Burnout Test . .3831 Endurance Test . .3832 Dielectric Voltage Withstand Test . .3933 Temperature Test . .4034 Grounding Continuity Test . .4335 Leakage Current Test . .4436 Leakage Current Test Following Humidity Conditioning . .4737 Weather Tests . .4837.1 General . .4837.2 Impact conditioning . .4837.3 General test conditions . .4837.4 General test results . .4937.5 Sprinkler test . .4937.6 Immersion test . .5237.7 Gasket tests . .5237.8 Gasket adhesion test . .5337.9 Rain test . .5338 Strain Relief Test . .5539 Screw Torque Test . .5540 Polymeric Enclosure Conduit Connection Tests . .5540.1 General . .5540.2 Pullout . .5540.3 Torque . .5640.4 Bending . .5641 Tests on knockouts . .5742 Impact Test on Units With Open Holes . .5843 Component Fault Test . .5844 Short Circuit Test . .5945 Limited Short Circuit Test . .59MANUFACTURING AND PRODUCTION TESTS46 Dielectric Voltage Withstand Test . .6047 Polarity Test . .6148 Continuity of Grounding Connection Test . .61AUGUST 18, 2009LOW VOLTAGE LANDSCAPE LIGHTING SYSTEMS - UL 18385RATINGS49 Details . .62MARKING50 Details . .6251 Installation Instructions . .65PART 2 EQUIPMENT CONNECTED TO THE POWER UNIT OUTPUT CONSTRUCTION52 General . .6653 Output Circuit Wiring and Connections . .6753.1 General . .6753.2 Internal wiring . .6753.3 Main low voltage cable . .6853.4 Unit low voltage cable . .68PERFORMANCE54 Temperature . .6955 Insulation-Piercing Terminal Temperature Test . .70MARKING56 General . .7257 Installation Instructions . .73PART 3 TUNGSTEN-HALOGEN LUMINAIRES INTRODUCTION58 General . .74CONSTRUCTION59 Lamp Containment Barrier . .74PERFORMANCE60 Adhesively Secured Lamp Containment Barrier Test . .7561 Lamp Containment Adhesive Support Test . .7662 Abnormal Operation Tests . .7662.1 General . .7662.2 Severe condition . .7762.3 Vertical surface . .7762.4 Overlamping . .7863 Polymeric Lamp Containment Barrier Test . .7863.1 General . .786LOW VOLTAGE LANDSCAPE LIGHTING SYSTEMS - UL 1838AUGUST 18, 200963.2 Test method . .78MARKING64 General . .7965 Instructions . .80PART 4 POND AND SMALL DECORATIVE FOUNTAIN LUMINAIRES AND FITTINGS INTRODUCTION66 General . .81CONSTRUCTION67 Water Barriers .