UL 2007A:2016 pdf free download – STANDARD FOR SAFETY Shatter Containment Of Lamps For Use In Regulated Food Establishments.
6.3 Freezer temperature exposure
6.3.1 One set of 12 specimens shall be loaded into a circulating air conditioning chamber, positioned horizontally on an elevated wire rack, with a space of at least one inch between each specimen to facilitate air flow. Within three hours, lower the temperature from ambient to -5 ±2°F (-20.5 ±1°C). Maintain the temperature for 21 hours. Then, within three hours, raise the chamber temperature to 25 ±2°F (-3.9 ±1°C). Maintain the temperature for 21 hours. This represents one complete cycle. Repeat this procedure for a total of 5 cycles.
6.3.2 Allow the chamber to return to ambient conditions with the chamber’s door closed. Remove the specimens from the conditioning chamber. There shall be no visible deformation of the coating.
6.4 Cooking temperature exposure
6.4.1 One set of 12 specimens shall be coated on their external surfaces with a thin, transparent, uniform coating of sprayed-on melted lard. The specimens shall then be placed in a circulating air chamber. Position the samples horizontally on an elevated wire rack in the chamber with a space of at least one inch between each specimen to facilitate airflow. Within 30 minutes, raise the temperature from ambient to 400 ±2°F (204 ±1°C). Once this temperature is reached, allow the chamber to return on its own (i.e., with no added heating or cooling) to ambient temperature. The chamber door should remain closed. Hold the specimens at the ambient temperature for at least 60 minutes. This represents one complete cycle. Repeat this procedure for a total of 10 cycles.
6.4.2 After ten cycles, remove the specimens from the conditioning chamber. There shall be no visible deformation of the coating.
7 Drop Test
7.1 General
7.1.1 Six conditioned specimens and two unconditioned specimens will be dropped into an open-top box to help contain and collect for inspection any ejected portions of the specimen. The box shall be constructed to the following specifications:
a) Base: 0.25 in (6.4 mm) thick sheets of AISI 300 stainless steel with no overlapping seams, positioned to create a rectangle as follows:
1) 3 ft (0.91 m) by 10 ft (3.05 m); or
2) Using the dimensions of the lamp to be tested, dimension for the base can be
determined by measuring the greatest length and width of the lamp in any plane and adding two feet to those values (for a lamp measuring 4 ft (1.22 m) by 2 in (50.8 mm), the sheet shall be 6 feet (1 .83 m) by 26 in (0.66 m).
b) Walls: Constructed of 0.5 in (12.7 mm) plywood or other rigid, durable material, at least 3 ft (0.91 m) high, tight-fitting at their junctions to the other walls and to the junctions at the perimeter of the base. One or more of the walls may pivot on a hinge or be constructed with a door to gain access to the specimen and facilitate inspection for ejected particles. Paint the
interior surfaces of the walls with a dark, washable paint.
The base may be lined with a single sheet layer of tissue paper of a contrasting color to improve visual inspection for ejected particles.