UL 542:2005 pdf download – Fluorescent Lamp Starters
UL 542:2005 pdf download – Fluorescent Lamp Starters.
12 Dielectric Voltage-Withstand Test
12.1 An automatic starter shall withstand without breakdown the application ot a 60-Hz essentially sinusoidal potential of 1000 V for 1 minute between live parts and dead metal parts.
12.2 To determine whether an automatic starter complies with the requirements in 12.1, the device is to be tested by means of a 500-VA or larger capacity transformer whose output voltage is essentially sinusoidal and can be varied The applied potential is to be increased from zero until the required test voltage is reached, and is to be held at that level for 1 minute, The increase in the applied potential is to be at a uniform rate and as rapid as is consistent with its value being correctly indicated by a voltmeter.
12.3 A 0.020-pF capacitor, or one with less capacity, used as a component of an automatic starter shall withstand for 1 minute without breakdown a 60-Hz essentially sinusoidal potential applied between the capacitor terminals. If the capacitor is metal-enclosed. ii shall also withstand the same test between its terminals and the metal enclosure, In either case, the test potential shall be three times the maximum root-mean-square voltage to which the capacitor is subjected during operation, but not less than 900 V.
12.4 Six samples prevously subiected to the Endurance Test and Deactivated-Lamp Test are to be used for the Dielectric Voltage-Withstand Test.
13.1 An automatic starter shall be marked on the extenor of the enclosure with the:
a) Manufacturer’s name, trade name, trademark, or other descriptive marking by which the organization responsible for the product can be identified,
b) The catalog number or the equivalent, and
C) The lamp wattage.
14.1 A manual starter is a momentary-contact switch that is intended to be used to close the filament circuit when starting a fluorescent lamp, and may include a line switch in the same unit.
14.2 A momentary-contact starter switch shall be so made that it cannot be left in the position in which the circuit is maintained.
15.3.1 The cord-inlet hole in a pendant type of manual starter shall provide an opening of not less than
9132 inch (7.1 mm) in diameter for fteibIe cord without a jacket, and not less than 13132 inch (10.3 mm) in diameter (or a jacketed type of cord. An oblong opening shall accommodate an 18 AWG (0.82 mm2), Type SP-2 or heavier parallel construction flexible cord.
15.3.2 The cord-Inlel hole in a pendant-type manual starter that has a metal enclosure shall be provided with an insulating bushing or the equivalent. The insulating material of the bushing shall be porcelain, phenolic or coldmolded composition, or other equivalent insulating material.
15.3.3 Hard fiber is acceptable for an insulating bushing if it is not less than 364 inch (1.2 mm) thick and is so formed and secured in place that it cannot be affected by conditions of ordinary moisture.
15.3.4 A threaded insulating bushing used in a threaded nipple shall not be smaller than the 318-inch (trade size) pipe size.
15.4 Strain relIef
15.4.1 Strain relief shall be provided In a pendant-type manual starter so that a mechanical strain on the flexible cord cannot be transmitted to the wiring terminals. If strain relief is provided for by space within the enclosure for a knot in the flexible cord, the surface against which the knot may bear or with which it may come In contact shall be well insulated and free from projections, sharp edges, burrs, fins, and the like, which may damage the cord.
15.4.2 A metal cord grip to provide strain relief may be employed on a pendant-type manual starter intended particularly for use with a jacketed type of flexible cord such as Types S. ST. SJ, or SJT, if the diameter of the cord-inlet hole in the clamp is not less than 5116 inch (79 mm).