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发表于 2010-8-13 10:28
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8.2 Flammability. g+ d% u. \- v8 e
8.2.1 A polymeric material used for electrical insulation or enclosure of live parts shall have a flame class4 L }& R3 \1 c7 s, Y+ D$ R
rating of HB, V-2, V-1, V-0, VTM-2, VTM-1, or VTM-0 in accordance with the requirements of the Standard
+ N' } z4 ^8 M1 ~for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94. The flame class& @1 s1 A% C! L; u0 G* e
rating of the material shall be judged at the minimum thickness employed at the walls and barriers in the
6 k! L" s. A; k' W' k! d5 Z7 _device which are critical to the functioning of the insulation or enclosure of the device.% q3 J$ j4 g6 s* H1 P) Z
Exception No. 1: Insulating materials employed in a self-contained receptacle shall instead comply with
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Exception No. 2: A polymeric material that complies with either the 12 mm or 20 mm (3/4-inch) flame/ S. s& i% T0 [9 N" v# j5 z7 x
flammability test described in UL 746C, need not have a flammability class rating.
% ^# o4 c1 r+ C% [$ ?0 c6 N S8.2.1 revised April 6, 2010 |
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