UL 676:2006 pdf download – Underwater Luminaires and Submersible Junction Boxes
UL 676:2006 pdf download – Underwater Luminaires and Submersible Junction Boxes.
30.7 In addition to the tests described in 30.1 — 30.6. a luminaire provided with a one•time operation thermal sensitive device shall additionally be tested in a totally dry condition by operation out of water while resting face down on a flat wooden deck. The temperature of the luminaire at the start of the test shall be 25 ±5°C (77 ±9°F). Results are acceptable if the protective device does not operate during the fIrst 3 minutes of operation.
31 Water Leakage Test
31.1 A luminaire shall be operated for at least 6 hours under a 31-cm (1-foot) head of water as measured to the top of the lens, in cycles of 1/2 hour on and 1/2 hour off. The results are in compliance when there is no entry of water into the luminaire.
31.2 The jacket of the cord for a wet-niche or no• niche luminaire is to be removed for a distance of at least 25.4 mm (1 inch), the removed portion starting at a distance of 15.2cm (8 Inches) outside the point ol entry into the luminaire, This section of the cord is to be completely immersed in the water dunng the water leakage test described in 31.1.
31.3 Unless Ihe luminaire constwchon provides for venting the luminaire enclosure during intended use. a tube such as described in 29.3 is not to be used during the water leakage test described in 31.1.
32 Dielectric Voltage-Withstand Test
32.1 A luminaire shall be subjected for 1 minute to the application of a 6Ohertz alternating potential between live parts and dead metal parts. The test potential shall be 1000 volts plus twice the rated voltage of the lunlinaire, The results are in compliance when there is no dielectric breakdown.
32.2 The test Is to be conducted immediately following the water leakage test described in 31.1. The luminaire is to be tested by means of a 500-volt-ampere or larger transformer, the output voltage of which is sinusoidal and can be varied. The applied potential is to be increased from zero until the required test value is reached, and held at that value for 1 minute. The applied potential is to be Increased at a uniform rate, and as rapidly as accurate voltmeter readings will allow.
33 StraIn-RelIef Test
33.1 A strain-relief device shall be subjected to a direct pull by means of a 22.7-kg mass (50-pound weight) applied to the cord as described in 33.2.
33.2 The pull is to be applied by suspending a 22.7-kg mass (50-pound weight) on the cord so the pull is in a direction normal to the plane of the fitting through which the cord enters the luminaire. The cord conductors are to be severed immediately adjacent to the terminals or splices when it is determined that the permitted movement of the cord results in strain on the terminals or splices. The pull is to be maintained for 1 minute. The construchon is in compliance when there is no movement of the cord more than 3.2 mm (118 inch) from the point where it exits the luminaire.
34 BondIng Millivolt Drop Test
34.1.1 The impedance between the parts specified In 22.1.4, 22.1.5, and 22.2.3 is to be determined as specified in this section. This is to be done by measuring the voltage potential between the specified points while a test current of 30 amperes (AC or DC) conducts through the specified parts and not less man 15 seconds after applying the test current, The impedance is to be determined by taking the quotient of the measured voltage potential and the test current. The test is to be perlormed with the product dry.
34.1.2 The test equipment used to monitor the current is to indicate the test current with a resolution and accuracy of 1/2 ampere or better.
34.1.3 The test equipment used to measure the voltage potential specified in 18.104.22.168, 22.214.171.124, and
34.3.1 is to indicate the measured voltage with a resolution and accuracy of 3 percent of the involved maximum permitted voltage potential or better
34.1.4 Within 1 hour prior to conducting this test, all screws that are loosened and tightened during relamping, gasket replacement, or other anticipated servicing, are to be loosened and then tightened with a screwdriver to the following torque based on the screw size. When tightening the screws, the specified torque is to be held for 5±1 seconds.