【正文】 lications 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。nitions For the purpose of these requirements, the following de174。nitions apply. BARRIER 177。 A part of the unit intended to physically limit access to parts that pose a risk of electric shock. CIRCUIT, CLASS 2 177。 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。 Part 3: Class 2 and Class 3 Transformers, UL 50853. CIRCUIT, ISOLATED LOW VOLTAGE LIMITED ENERGY (LVLE) 177。 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 V peak ac (30 V rms) or 60 V dc。 and a maximum output current limited to: a) maximum 8 amps for 0 177。 V peak ac, or 0 177。 30 V dc, or b) 150/V amps, for a voltage between 30 177。 60 V dc. Measurements for determining LVLE circuit status shall be per the requirements in Determination of LowVoltage, LimitedEnergy Circuit Status of . ENCLOSURE, ELECTRICAL 177。 A part of the equipment intended to limit access to parts that are operating at voltage levels in excess of Class 2 or LVLE. ENCLOSURE, FIRE 177。 A part of the equipment that is intended to minimize the spread of 174。re or 175。ames from within a product. ENVIRONMENTAL LOCATIONS a) DRY LOCATION 177。 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 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 location in which water can drip, splash, or 175。ow on or against electrical equipment. INSULATIONPIERCING TERMINAL 177。 A terminal having a contact pin that punctures the conductor insulation and perates between the conductor strands. ISOLATED OUTPUT 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。 A solidstate ponent embodying a pn junction, emitting optical radiation when excited by an electric current. 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 8 UL 8750 OCTOBER 17, 2020 LED ARRAY (LED MODULE) 177。 An assembly of one or more LED discrete electronic ponents on a printed circuit board, typically with optics and additional thermal, mechanical, and electrical interfaces. LED CONTROL MODULE (LED CONTROLLER) 177。 Electronic circuitry interposed between the power source and an LED array to dim, switch, or 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. LED DRIVER 177。 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。 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. MEASUREMENT INDICATION UNIT (MIU) 177。 The rms equivalent value of a 60 Hz sinusoidal leakage current in milliamps (mA), adjusted to pensate as necessary for leakage currents posed of plex waveforms or frequencies other than 50 or 60 Hz. It is determined by dividing the output voltage (V3) in millivolts (mV) rms by 500 (the value in ohms of the resistance in parallel with V2) in the measurement instrument circuit in Figure . PART, DEAD CONDUCTIVE 177。 A conductive part that, under normal operating conditions, carries no electrical current other than leakage current. revised November 1, 2020 PART, HAZARDOUS LIVE 177。 A part located in a circuit that is operating in excess of the risk of electric shock or risk of 174。re limits. PART, LIVE 177。 A conductive part that has an electrical difference of potential with respect to earth ground or any other conductive part. A part connected to a grounded supply (neutral) conductor is considered to be a live part. PLC (PERFORMANCE LEVEL CHARACTERISTIC) VALUE 177。 An integer that de174。nes a range of test values for a given electrical/mechanical property test for polymeric (plastic) materials as de174。ned in the Standard for Polymeric Materials 177。 Use in Electrical Equipment Evaluations, UL 746C. POWER LIMITED CIRCUIT 177。 See Section 725 of the