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楼主 |
发表于 2009-9-8 20:28
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怎么理解下面的意思(UL498-2001比较老了)
6 x* v/ y* l( t! n(8 Insulating Materials)- N8 B" o# o w" |
8.3 Electrical properties(条款里也有对绝缘材料厚度的要求)
9 w# G9 x2 l6 G" N" t8.4 Thermal properties8 c. v0 z, H+ J
8.4.1 A polymeric material used for electrical insulation or enclosure of live parts shall have the relative
" e: @# K4 t+ Q% [9 m6 j ]thermal index ratings shown in Table 8.2 for the specific application of the insulating material. For: l. A+ A0 P5 ^* u0 U
materials with other than VTM flammability classifications, the material shall be evaluated using the
% @- k/ r7 m$ x$ a+ m, w2 Yspecimen thickness employed in the end product or nominal 1/8 inch (3.2 mm) thickness, whichever is. G+ ^# P% B' m4 Z( p
greater.
J. w7 I' |% J5 Q2 p4 e以上条款的绝缘材料的厚度要求是否对插头外围尺寸起限制作用.或者只是对材料测试时的一种要求. |
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