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发表于 2010-8-13 10:28
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8.2 Flammability# x6 d" a% ^: b9 p% p
8.2.1 A polymeric material used for electrical insulation or enclosure of live parts shall have a flame class: U8 |" r [1 R4 S0 L
rating of HB, V-2, V-1, V-0, VTM-2, VTM-1, or VTM-0 in accordance with the requirements of the Standard
* G: x5 q# g% Q& v* r7 g3 Bfor Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94. The flame class/ [2 I* u+ K& Y \, Y
rating of the material shall be judged at the minimum thickness employed at the walls and barriers in the
1 u4 j( T" \1 ndevice which are critical to the functioning of the insulation or enclosure of the device.
' d1 Q( _" n4 |. H# Q7 B9 hException No. 1: Insulating materials employed in a self-contained receptacle shall instead comply with
# h Z' Q) T1 U4 B& u G40.1.: p* N. W/ C2 h& l* w. o
Exception No. 2: A polymeric material that complies with either the 12 mm or 20 mm (3/4-inch) flame
% F* r1 r4 p9 ]3 j; z4 p# gflammability test described in UL 746C, need not have a flammability class rating.' r: v; w0 M& o1 Y# s! i3 U6 m0 s0 M
8.2.1 revised April 6, 2010 |
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