【正文】 Part 2: General Purpose Transformers, UL 50852, or d) The Standard for DryType General Purpose and Power Transformers, UL 1561. revised November 1, 2020 A power supply, LED driver, or transformer shall be used within its rated input, output, and environmental ratings. UL COPYRIGHTED MATERIAL – NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Document Was Downloaded By jeanne han For Use By CHENGDU NETON OPTOELECTRONIC TECHNOLOGIES CO LTD 30232 : 6/27/2014 9:58 AM MAY 22, 2020 UL 8750 9 CONSTRUCTION 5 Environmental Considerations A unit intended for dry locations only shall be so identi174。 Safety 177。 A generic term meaning any discrete device, subassembly, or assembly. UNIT, FIXED 177。 A risk of 174。 An electronic device capable of controlling current, voltage, or power within its design limits. UL COPYRIGHTED MATERIAL – NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Document Was Downloaded By jeanne han For Use By CHENGDU NETON OPTOELECTRONIC TECHNOLOGIES CO LTD 30232 : 6/27/2014 9:58 AM MAY 22, 2020 UL 8750 8A RISK OF ELECTRIC SHOCK 177。 An electrical source, such as a transformer or power supply that plies with the requirements of the Standard for Class 2 Power Units, UL 1310, or the Standard for Low Voltage Transformers 177。nes a range of test values for a given electrical/mechanical property test for polymeric (plastic) materials as de174。 A part located in a circuit that is operating in excess of the risk of electric shock or risk of 174。 A power source that adjusts the voltage or current to LEDs, ranging in plexity from a resistor to a constant voltage or constant current power supply. Also referred to as Lamp Control Gear. (See also Power Source.) LED PACKAGE 177。 A circuit with only magic, capacitive, or optical connection to any groundreferenced supply source. A low voltage circuit derived by a dropping resistor is not isolated. LED (LIGHT EMITTING DIODE) 177。 An exterior or interior location that is normally or periodically subject to condensation of moisture in, on, or adjacent to, electrical equipment, and includes partially protected locations. c) WET LOCATION 177。 A part of the equipment that is intended to minimize the spread of 174。 V peak ac, or 0 177。 A circuit supplied by an isolating source that plies 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 177。c conditions. Units of measurement Except for conductor size, values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. All values of voltage and current are true root mean square (rms) values unless otherwise indicated. For customary purposes wire sizes are in American Wire Gauge (AWG). Reference publications 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. UL COPYRIGHTED MATERIAL – NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Document Was Downloaded By jeanne han For Use By CHENGDU NETON OPTOELECTRONIC TECHNOLOGIES CO LTD 30232 : 6/27/2014 9:58 AM NOVEMBER 18, 2020 UL 8750 7 3 De174。ned within this standard. These lighting products are intended for installation on branch circuits of 600 V nominal or less in accordance with the National Electrical Code (NEC), ANSI/NFPA 70, and for connection to isolated (nonutility connected) power sources such as generators, batteries, fuel cells, solar cells, and the like. LED equipment is utilized in lighting products that ply with the endproduct standards listed below. The requirements in this standard are intended to supplement those in other endproduct 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 Power 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 PlugIn Nightlights, UL 1786, i) Low Voltage Landscape Lighting Systems, UL 1838, j) SelfBallasted Lamps and Lamp Adapters, UL 1993, k) Luminous Egress Path Marking Systems, UL 1994, and l) Low Voltage Lighting Systems, UL 2108. UL COPYRIGHTED MATERIAL – NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Document Was Downloaded By jeanne han For Use By CHENGDU NETON OPTOELECTRONIC TECHNOLOGIES CO LTD 30232 : 6/27/2014 9:58 AM 6 UL 8750 NOVEMBER 18, 2020 2 General Components Except as indicated in this clause, a ponent of a product covered by this standard shall ply with the requirements for that ponent. See the Standards for Components appendix for a list of standards covering ponents generally used in the products covered by this standard. A ponent is not required to ply with a speci174。 2020 UNDERWRITERS LABORATORIES INC.