1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 234 Low Voltage Lighting Fixtures for Use in Recreational VehiclesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MAT
2、ERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Low Voltage Lighting Fixtures for Use in Recreational Vehicles, UL 234 Fifth Edition, Dated January 21, 2005 Summary of Topics This revision to ANSI/UL 234 includes the following chang
3、es in requirements: Add requirements for RV luminaires suitable for direct contact with bedding (or similar) materials Revision to ambient temperature measurement method Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the mar
4、gin. 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. The new and revised requirements are substantially in accordance with Proposal(s) o
5、n this subject dated August 29, 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 UL. UL provides this Standard as i
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7、 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 price paid for this Standard, regardle
8、ss 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
9、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 indicated in the note following the a
10、ffected item. 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. JANUARY 15, 2015 UL 234 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION
11、WITHOUT PERMISSION FROM UL JANUARY 15, 2015 UL 234 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 21, 2005 (Title Page Reprinted: January 15, 2015) 1 UL 234 Standard for Low Voltage Lighting Fixtures for Use
12、in Recreational Vehicles Prior to the rst edition, the requirements for the products covered by this standard were included in the Standard for Electric Lighting Fixtures, UL 57. First Edition November, 1979 Second Edition April, 1983 Third Edition January, 1993 Fourth Edition January, 1994 Fifth Ed
13、ition January 21, 2005 This ANSI/UL Standard for Safety consists of the Fifth Edition including revisions through January 15, 2015. The most recent designation of ANSI/UL 234 as an American National Standard (ANSI) occurred on January 15, 2015. ANSI approval for a standard does not include the Cover
14、 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. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. UL
15、s 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 and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS LA
16、BORATORIES INC. ANSI/UL 234-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 15, 2015 UL 234 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS
17、 PART 1 ALL LUMINAIRES INTRODUCTION 1 Scope .5 2 Undated References 5 3 Components 5 4 Units of Measurement .6 CONSTRUCTION 5 Frame and Enclosure 6 6 Means for Mounting .7 7 Thermal Insulation 7 8 Corrosion Resistance 8 9 Shades, Diffusers, Lenses, and Decorative Parts .8 10 Current-Carrying Parts 8
18、 11 Mounting of Components and Parts 8 12 Supply Connections 9 13 Cord Equipped Luminaire .9 14 Wiring .10 15 Prevention of Wire Damage 11 16 Wiring To A Lamp-Supported Lampholder .11 17 Electrical Connections .11 18 Insulating Material 12 19 Spacings 12 20 Barriers 13 21 Switches .13 22 Lampholders
19、 .13 23 Cigarette Lighter Receptacles 14 24 Tungsten-Halogen Luminaires 14 24.1 General .14 24.2 Lamp containment barrier .14 25 Wet Locations 15 PERFORMANCE 26 General 16 27 Current Input Test 16 28 Temperature Test .16 28A Direct Contact Temperature Test 20 29 Abnormal Operation Test 20 30 Water S
20、pray Test .20 31 Water Absorption Test .23 32 Gasket Tests .23 33 Gasket Adhesion Test .24 34 Strain Relief Test .24 35 Polymeric Lamp Containment Barrier 24 35.1 General .24 JANUARY 15, 2015 UL 234 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION F
21、ROM UL 35.2 Test method .25 36 Thermal Conditioning Test .25 37 Impact Test 26 MARKINGS 38 General 26 PART 2 FLUORESCENT LUMINAIRES GENERAL 39 Scope .27 CONSTRUCTION 40 Frame and Enclosure .27 41 Printed Wiring Boards .28 42 Spacings 28 43 Switches .29 44 Low Voltage, Power-Limited Circuits 29 45 El
22、ectronic Components 30 PERFORMANCE 46 Conformal-Coating Tests 30 47 Conformal Coating Test Program II .31 47.1 General .31 47.2 Samples 31 47.3 Room ambient conditioning 31 47.4 Thermal conditioning 32 47.5 Dielectric voltage-withstand test for conformal coating 32 MARKING 48 General 33 APPENDIX A S
23、tandards for ComponentsA1 JANUARY 15, 2015 UL 234 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PART 1 ALL LUMINAIRES INTRODUCTION 1 Scope 1.1 These requirements apply to low-voltage luminaires, rated 24 volts or less, of the surface moun
24、ted or recessed type intended for permanent installation in park trailers in accordance with Article 552 of the National Electrical Code, NFPA 70, or in recreational vehicles in accordance with the Standard for Low Voltage Systems in Conversion and Recreational Vehicles, ANSI/RVIA LV (as referenced
25、by Article 551 of NFPA 70). 1.1 revised January 15, 2015 1.2 These requirements do not apply to running or clearance lights intended to be mounted on the exterior of a recreational vehicle. 1.3 Light emitting diode (LED) components and subassemblies integral to a low voltage luminaire covered by thi
26、s standard shall comply with the applicable requirements of the Standard for Light Emitting Diode (LED) Equipment for Use in Lighting Products, UL 8750. 1.3 added January 9, 2012 2 Undated References 2.1 Any undated reference to a code or standard appearing in the requirements of this standard shall
27、 be interpreted as referring to the latest edition of that code or standard. 3 Components 3.1 Except as indicated in 3.2, a component of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of standards covering components generally used
28、 in the products covered by this standard. 3.2 A component is not required 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
29、. 3.3 A component shall be used in accordance with its rating established for the intended conditions of use. 3.4 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 t
30、emperatures not exceeding specied limits, and shall be used only under those specic conditions. JANUARY 15, 2015 UL 234 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Units of Measurement 4.1 Values stated without parentheses are the req
31、uirement. Values in parentheses are explanatory or approximate information. CONSTRUCTION 5 Frame and Enclosure 5.1 A frame and enclosure shall be formed and assembled so that it will have the strength and rigidity necessary to resist the abuses to which it is likely to be subjected, without increasi
32、ng the likelihood of re or injury to persons due to total or partial collapse, with resulting reduction of spacings, loosening or displacement of parts, or similar effects. 5.2 Sheet metal of a frame or enclosure shall be formed from stock having a minimum thickness of 0.016 inch (0.41 mm) if of ste
33、el and 0.020 inch (0.51 mm) if of aluminum. Exception: Metal may be thinner if the part is investigated and determined to have equivalent mechanical strength. Among the factors to be considered are size, shape, function, and resistance to distortion both during intended use and service and anticipat
34、ed abuse. 5.3 An enclosure or frame formed of a nonmetallic material may be used if, upon investigation, the material exhibits properties in accordance with the requirement in 5.1. Among the factors to be considered are: a) Mechanical strength the impact evaluation in Section 37, Impact Test; b) Com
35、bustibility minimum ammability rating of HB; c) Mold stress the mold stress evaluation in the Standard for Polymeric Material Use in Electrical Equipment Evaluations, UL 746C shall be performed by the air oven method and; d) Temperature the material shall possess a mechanical impact Relative Tempera
36、ture Index (RTI), in accordance with Standard for Polymeric Materials Long Term Property Evaluations, UL 746B, of at least the temperature measured on the part during the normal temperature test. Exception No. 1: If the temperature measured during the normal temperature test is less than 65C (149F),
37、 then the enclosure or frame need not comply with this requirement. Exception No. 2: An enclosure or frame subjected to the Thermal Conditioning Test, Section 36 need not comply with this requirement. 5.4 An operating part, such as a relay or similar device, shall be located such that it will not be
38、 exposed to dust or other material that might adversely affect its intended operation. JANUARY 21, 2005 UL 234 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6 Means for Mounting 6.1 Means for permanent mounting of the luminaire shall be p
39、rovided. Exception No. 1: Luminaires intended to be installed only by manufacturers of recreational vehicles may be secured using plastic punching and riveting tools, provided that complete instructions are furnished. Instructions and installation tools shall be subject to investigation. Exception N
40、o. 2: A mounting means other than holes, screws, or bolts is acceptable if equivalent support is provided, as determined by an investigation. 6.2 A hole, boss, and the like shall be arranged so that: a) Support is provided; and b) Firm seating of the mounting hardware, such as a screw or bolt, will
41、not result in distortion of the bearing surfaces, cracking, breaking, or other adverse effects. 6.3 A luminaire shall be designed and constructed for mounting directly to the mounting surface and not for suspension by a chain or other means that would allow movement or swinging of the luminaire. 7 T
42、hermal Insulation 7.1 Thermal insulation that is provided as part of a luminaire shall be secured in place as described in 7.2. 7.2 Thermal insulation is considered to be secured in place if it is attached to a luminaire by: a) Two staples or bolts that will locate the insulation in the intended pos
43、ition; b) An adhesive applied to at least one-third of the surface of the insulation; c) A member of a luminaire that need not be removed for installation; or d) An equivalent means. Lead wires projecting through insulation are not acceptable for securing the insulation. 7.3 Thermal insulation that
44、forms part of an enclosure shall comply with the applicable requirements in Frame and Enclosure, Section 5. All thermal insulation shall have a ammability rating of HB or better. JANUARY 21, 2005 UL 234 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSI
45、ON FROM UL 8 Corrosion Resistance 8.1 If corrosive action on an iron or steel part will result in a risk of re, electric shock, or injury to persons, such part shall be made resistant to corrosion by enameling, varnishing, painting, galvanizing, plating, or a similar means. 9 Shades, Diffusers, Lens
46、es, and Decorative Parts 9.1 A shade, diffuser, lens, or decorative part shall be of glass, metal, phenolic composition, or other material having a ammability rating of HB or better. Exception: A bushing, wire tie, or other small part need not have a ame rating if it meets the following conditions:
47、a) Volume is less than 2 cubic inches (32 cm 3 ); b) No dimension is greater than 3 inches (76.2 mm), and c) Not in a position to propagate ame between 2 combustible materials. 9.2 A shade, diffuser, lens, or decorative part shall be positioned away from contact with any lamp. 10 Current-Carrying Pa
48、rts 10.1 A current-carrying part shall have mechanical strength and ampacity in accordance with the intended use. 10.2 Steel used as a current-carrying part shall comply with Frame and Enclosure, Section 5, and its use shall be limited to those parts of a luminaire that primarily serve a mechanical
49、function, such as a lampholder or a mounting frame. 11 Mounting of Components and Parts 11.1 A component such as a lampholder, switch, or other part of a luminaire assembly shall be restricted from loosening or turning if such motion may adversely affect the intended performance of a component or may result in a risk of re. 11.2 The position of a lamp with respect to the enclosure or any other part of the luminaire shall be maintained during intended use and servicing. 11.3 A part used for t
