8.2 Flammability
8.2.1 A polymeric material used for electrical insulation or enclosure of live parts shall have a flame class
rating of HB, V-2, V-1, V-0, VTM-2, VTM-1, or VTM-0 in accordance with the requirements of the Standard
for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94. The flame class
rating of the material shall be judged at the minimum thickness employed at the walls and barriers in the
device which are critical to the functioning of the insulation or enclosure of the device.
Exception No. 1: Insulating materials employed in a self-contained receptacle shall instead comply with
40.1.
Exception No. 2: A polymeric material that complies with either the 12 mm or 20 mm (3/4-inch) flame
flammability test described in UL 746C, need not have a flammability class rating.
8.2.1 revised April 6, 2010 |
发表于 2012-2-6 20:04:04
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