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发表于 2010-8-13 10:28
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8.2 Flammability
3 H& `5 D$ `* P- }, y8.2.1 A polymeric material used for electrical insulation or enclosure of live parts shall have a flame class
. Z: R+ z& c! srating of HB, V-2, V-1, V-0, VTM-2, VTM-1, or VTM-0 in accordance with the requirements of the Standard
- M7 d% g& T% [$ n/ v& v3 yfor Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94. The flame class6 {$ q3 D+ B D i3 D3 T `3 H
rating of the material shall be judged at the minimum thickness employed at the walls and barriers in the
+ ^7 A9 _% ?3 t% I) rdevice which are critical to the functioning of the insulation or enclosure of the device.
S+ n% j/ t: U6 N" @: U, R& TException No. 1: Insulating materials employed in a self-contained receptacle shall instead comply with# m4 _+ c9 [+ s% N- R) o, J
40.1.* ?. L6 S! E$ Q0 I
Exception No. 2: A polymeric material that complies with either the 12 mm or 20 mm (3/4-inch) flame
$ i% |- \5 V* Wflammability test described in UL 746C, need not have a flammability class rating.8 j- D4 I/ [& l0 \6 N% J
8.2.1 revised April 6, 2010 |
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