UL 676-2015 pdf download
UL 676-2015 pdf download.Underwater Luminaires and Submersible Junction Boxes.
40.3 The luminaire housing of a wet-niche luminaire or the luminaire enclosure ot a dry-niche luminaire is to be mounted in the simulated niche or equivalent, resulting in the firmest mounting likely to be encountered in service. The mounting bracket shall be mounted to a simulated pool wall that results in the firmest mounting encountered in service. The nosepiece of the deceleration unit is to be placed normal to the surface of the luminaire chosen at the point of contact. The line of motion of the mass driving the deceleration unit during the application of force to the luminaire is to be horizontal and in line with the axis of the deceleration unit
40.4 A sheet of lead buffer pad is to be secured over the point of contact, and the deceleration unit and driving mass are to be suspended as shown in Figure 40.3. The driving mass is to be raised a total height of 114 mm (4.5 Inches) and released.
41 Electric Shock Test
41.1 General
41.1.1 A luminaire shall be investigated with regard to the risk of electric shock with:
a) Its lens broken;
b) A ground on either side of an isolated supply; and
C) The swimmer in contact with the luminaire.
The results are in compliance when the luminaire does not introduce a current density (D) greater than 30 microamperes per square centimeter.
Exception: For a luminaire intended to be connected directly to a grounded supply, the current density (0) may be 60 microamperes per square centimeter with the polarity of the fuminaire leads reversed.
41.1.2 The test conditions described in 41.1.3 — 41.1.11 apply to incandescent lamp luminaires constructed such that no part of either lamp electrode is more than 76 mm (3 inches) from an uninsulated part of the opposite polarity lamp electrode or grounded luminaire enclosure. The distance specified is the conductive path distance through water of a flooded luminaire with the lamp modified as described in 41.1.6. Intervening nonconductive parts of the luminaire and the glass of a PAR lamp reflector are to be taken into account in measuring these distances. For other luminaire constructions, an investigation is to be conducted to determine the test conditions necessary to obtain the current density or differential current.
41,1.3 The following is a description of the test-modified luminaire shown in Figure 41.1. The widest forming shell bezel of a wet-niche luminaire forming shell that is intended to be used with the luminaire is to be removed from the forming shell and attached to the luminaire bezel. With the luminaire lens and the lamp or lamps removed, a contact su,lace’ is to be established that approximates the surface of contact between a swimmer and the front of the luminaire. All surtaces of the luminaire. luminaire bezel, shielding grids, lens guard. or the like extending from this established contact surface into the interior of the lum,naire are considered to be Intenor surfaces of the luminaire for the purposes of this test. All other surfaces, either located on the established contact surface or on the outer surface of the luminaire, are considered to be exterior surfaces of the luminaire for the purpose of this test.
41.1.4 All interior surfaces of the luminaire are to remain unmodified.
Exception: Conductive parts having coatings (such as paint), the insulating propertIes ol which are in question, are to be covered with additional insulating material. or the coating is to be completely removed to expose the conductive parts, whichever produces the most adverse results.
41.1.5 All exterior surfaces of the conductive parIs of the lumiriaire, luminaire bezel, forming shell bezel, shielding grid, lens guard, or the like are to be coated with an insulating material. Of these coated exterior surfaces, those surfaces which also form part of the contact surface are to be covered with copper foil in such a way that the foil is not electrically connected to the luminaire bezel. grid, guard, or the like. An insulated lead is to be attached to the copper foil for connection In the circuit shown in Figure 41.2.
