UL 8750-2015 UL Standard for Safety Light Emitting Diode (LED) Equipment for Use in Lighting Products (Second Edition Reprint with revisions through and including December 18 2017).pdf

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1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 8750 Light Emitting Diode (LED) Equipment for Use in Lighting ProductsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED

2、 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Light Emitting Diode (LED) Equipment for Use in Lighting Products, UL 8750 Second Edition, Dated September 15, 2015 Summary of Topics This ANSI/UL 8750 new edition includes the fol

3、lowing changes in requirements: Add exception to 7.11.1.1 for construction evaluation of coil insulation for certain types of coils and windings Revise humidity exposure testing in 8.12.1.1 and 8.12.1.2 Clarify voltage labeling requirements for constant current systems Add Supplement SA Requirements

4、 for safety-related electronic circuits Revise footnote a in 3.24 to correct maximum ac + dc voltages for wet locations Add Supplement SB Requirements for Type HL LED drivers Add Supplement SC Requirements for Temperature Limited (Type TL) LED drivers Revise polymeric material requirements including

5、 requirements for secondary optics Add Supplement SD Requirements for light emitting diode packages Geographical separation of Class 2 circuits and non-Class 2 circuits Withdrawal of Appendix B Add exception to minimum letter height requirement in 9.1.2 for identication and ratings markings in 9.2 M

6、iscellaneous and minor proposed revisions The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated December 5, 2014 and June 26, 2015. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in an

7、y form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of 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 purpos

8、e. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including 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

9、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 of the form of the claim. SEPTEMBER 15, 2015 UL 8750 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSIO

10、N FROM UL 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 while purchaser is

11、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 affected item. The p

12、rior 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. SEPTEMBER 15, 2015 UL 8750 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSI

13、ON FROM UL SEPTEMBER 15, 2015 1 UL 8750 Standard for Light Emitting Diode (LED) Equipment for Use in Lighting Products First Edition November, 2009 Second Edition September 15, 2015 This ANSI/UL Standard for Safety consists of the Second Edition. The most recent designation of ANSI/UL 8750 as an Ame

14、rican National Standard (ANSI) occurred on September 15, 2015. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. 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 Propo

15、sal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. 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 and all copyrights, ownerships, and rights regarding those St

16、andards shall remain the sole and exclusive property of UL. COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 8750-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 15, 2015 UL 8750 2 No Text on This PageUL COPYRIGHTED MATERI

17、AL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .6 2 General 7 2.1 Components 7 2.2 Units of measurement .7 2.3 Reference publications 7 3 Denitions 8 4 Power supplies, LED Drivers, and Transformers .12 CONSTRUCTION 5 Environmental

18、Considerations .13 6 Mechanical Construction 14 6.1 General 14 6.2 Metal thickness .14 6.3 Polymeric materials 15 6.4 Enclosure openings 16 6.5 Conductor protection .16 6.6 Strain relief .16 6.7 Potting compound .17 7 Electrical Construction 17 7.1 General 17 7.2 Accessibility 17 7.3 Internal wiring

19、 .19 7.4 Supply and load connections .21 7.5 Separation of circuits 28 7.6 Insulating materials 28 7.7 Printed wiring boards 29 7.8 Electrical spacings .30 7.9 Circuit components 32 7.10 Protective devices 33 7.11 Coil insulation 34 7.12 Class 2 output circuits 38 PERFORMANCE 8 Performance Tests .38

20、 8.1 General 38 8.2 Input test .39 8.3 Temperature test 39 8.4 Temperature test alcove 45 8.5 Temperature test oven .47 8.6 Dielectric voltage withstand test .49 8.7 Abnormal tests 50 8.8 Circuit power limit measurement test .53 8.9 Leakage current measurement test 54 8.10 Cord strain and pushback r

21、elief test 57 8.11 Security of output terminals 57 8.12 Insulation-piercing connection thermal cycling test 58 SEPTEMBER 15, 2015 UL 8750 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 8.13 Adhesive support test .58 8.14 Environmental test

22、s 59 8.15 Mechanical strength tests for metal enclosures 62 8.16 Determination of low-voltage, limited-energy circuit status .62 8.17 Knockout secureness test .63 9 Markings 63 9.1 General 63 9.2 Identication and ratings .64 9.3 Construction-related markings .65 SUPPLEMENT SA - REQUIREMENTS FOR SAFE

23、TY-RELATED ELECTRONIC CIRCUITS SA1 Scope SA1 SA2 Denitions SA1 SA3 General SA2 SA4 Reliability Evaluation .SA3 SUPPLEMENT SB - REQUIREMENTS FOR TYPE HL LED DRIVERS SB1 Scope SB1 SB2 Construction SB1 SB3 Performance SB1 SB4 Marking SB1 SUPPLEMENT SC - REQUIREMENTS FOR TEMPERATURE LIMITED (TYPE TL) LE

24、D DRIVERS SC1 Scope SC1 SC2 Denitions SC1 SC3 Construction SC1 SC4 Performance SC2 SC5 Marking SC3 SUPPLEMENT SD - REQUIREMENTS FOR LIGHT EMITTING DIODE (LED) PACKAGES SD1 Scope SD1 SD2 Denitions SD1 SD3 Environmental Considerations .SD3 SD3.1 Humidity conditioning .SD3 SD3.2 Dry locations .SD3 SD3.

25、3 Damp locations .SD3 SD3.4 Wet locations .SD4 SD4 Construction SD4 SD4.1 Spacings .SD4 SD4.2 Printed Wiring Boards (PWBs) SD4 SD4.3 Polymeric and other insulating materials Relative Thermal Index (RTI) .SD4 SEPTEMBER 15, 2015 UL 8750 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION

26、OR DISTRIBUTION WITHOUT PERMISSION FROM UL SD4.4 Polymeric and other insulating materials Flame rating .SD5 SD5 Performance SD5 SD6 Dielectric Voltage Withstand Test SD5 SD7 Steady Force Test 30 N SD6 SD8 Thermal Aging Test .SD11 SD9 Markings SD13 APPENDIX A Standards for ComponentsA1 SEPTEMBER 15,

27、2015 UL 8750 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover LED equipment that is an integral part of a luminaire or other lighting equipment and which operates in the visible light spectru

28、m between 400 700 nm. These requirements also cover the component parts of light emitting diode (LED) equipment, including LED drivers, controllers, arrays, modules, and packages as dened within this standard. 1.2 These lighting products are intended for installation on branch circuits of 600 V nomi

29、nal or less in accordance with the National Electrical Code (NEC), ANSI/NFPA 70, and for connection to isolated (non-utility connected) power sources such as generators, batteries, fuel cells, solar cells, and the like. 1.3 LED equipment is utilized in lighting products that comply with the end-prod

30、uct standards listed below. The requirements in this standard are intended to supplement those in other end-product standards. Included are: a) Electric Signs, UL 48, b) Portable Electric Luminaires, UL 153, c) Underwater Luminaires and Submersible Junction Boxes, UL 676, d) Emergency Lighting and P

31、ower Equipment, UL 924, e) Stage and Studio Luminaires and Connector Strips, UL 1573, f) Track Lighting Systems, UL 1574, g) Luminaires, UL 1598, h) Direct Plug-In Nightlights, UL 1786, i) Low Voltage Landscape Lighting Systems, UL 1838, j) Self-Ballasted Lamps and Lamp Adapters, UL 1993, k) Luminou

32、s Egress Path Marking Systems, UL 1994, and l) Low Voltage Lighting Systems, UL 2108. SEPTEMBER 15, 2015 UL 8750 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 General 2.1 Components 2.1.1 Except as indicated in this clause, a component

33、of a product covered by this standard shall comply with the requirements for that component. See the Standards for Components appendix for a list of standards covering components generally used in the products covered by this standard. 2.1.2 A component is not required to comply with a specic requir

34、ement 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. 2.1.3 A component shall be used in accordance with its rating established for the intended conditions o

35、f use. 2.1.4 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 temperatures not exceeding specied limits, and shall be used only under those specic conditions. 2.2 U

36、nits of measurement 2.2.1 Except for conductor size, values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 2.2.2 All values of voltage and current are true root mean square (rms) values unless otherwise indicated. 2.2.3 For customary

37、 purposes wire sizes are in American Wire Gauge (AWG). 2.3 Reference publications 2.3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. SEPTEMBER 15, 2015 UL 8750 7UL COPYRIGH

38、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Denitions 3.1 For the purpose of these requirements, the following denitions apply. 3.2 BARRIER A part of the unit intended to physically limit access to parts that pose a risk of electric shock. 3.3 CI

39、RCUIT, CLASS2Acircuit supplied by an isolating source that complies with the requirements of the Standard for Class 2 Power Units, UL 1310, or the Class 2 requirements of the Standard for Low Voltage Transformers Part 3: Class 2 and Class 3 Transformers, UL 5085-3. 3.4 CIRCUIT, ISOLATED LOW VOLTAGE

40、LIMITED ENERGY (LVLE) A circuit supplied by a source with no direct electrical connection between input and output, such as provided by a transformer or optical isolator, and with output parameters as follows: source with a maximum output voltage of 42.4 V peak ac (30 V rms) or 60 V dc; and a maximu

41、m output current limited to: a) maximum 8 amps for 0 42.4 V peak ac, or03 0Vd c ,o r b) 150/V amps, for a voltage between 30 60 V dc. Measurements for determining LVLE circuit status shall be per the requirements in Determination of Low-Voltage, Limited-Energy Circuit Status of 8.16. 3.5 ENCLOSURE,

42、ELECTRICAL A part of the equipment intended to limit access to parts operating at voltage levels that represent a risk of electric shock per 3.24. 3.6 ENCLOSURE, FIRE A part of the equipment that encloses circuits that are considered a risk of re per 3.25. 3.7 ENVIRONMENTAL LOCATIONS a) DRY LOCATION

43、 A location not normally subject to dampness, but may include a location subject to temporary dampness, as in the case of a building under construction, provided ventilation is adequate to prevent an accumulation of moisture. b) DAMP LOCATION An exterior or interior location that is normally or peri

44、odically subject to condensation of moisture in, on, or adjacent to, electrical equipment, and includes partially protected locations. c) WET LOCATION A location in which water can drip, splash, or ow on or against electrical equipment. 3.8 INSULATION-PIERCING TERMINAL A terminal having a contact pi

45、n that punctures the conductor insulation and penetrates between the conductor strands. 3.9 ISOLATED OUTPUT A circuit with only magnetic, capacitive, or optical connection to any ground-referenced supply source. A low voltage circuit derived by a dropping resistor is not isolated. 3.10 LED (LIGHT EM

46、ITTING DIODE) A solid-state component embodying a p-n junction, emitting optical radiation when excited by an electric current. SEPTEMBER 15, 2015 UL 8750 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.11 LED ARRAY (LED MODULE) An assemb

47、ly of one or more LED discrete electronic components on a printed circuit board, typically with optics and additional thermal, mechanical, and electrical interfaces. 3.12 LED CONTROL MODULE (LED CONTROLLER) Electronic circuitry interposed between the power source and an LED array to dim, switch, or

48、otherwise control the electrical energy to the LED array. The device does not contain a power source and is not connected directly to the branch circuit. 3.13 LED DRIVER A power source that adjusts the voltage or current to LEDs, ranging in complexity from a resistor to a constant voltage or constan

49、t current power supply. Also referred to as Lamp Control Gear. (See also Power Source.) 3.14 LED PACKAGE An assembly of one or more LED die that contains wire bond connections and may include an optical element and thermal, mechanical, and electrical interfaces. The package does not include a power source and is not connected directly to the branch circuit. 3.15 MEASUREMENT INDICATION UNIT (MIU) The rms equivalent value of a 60 Hz sinusoid