|
这个不需要认证的,直接可以作为绝缘材料,在标准中叫vulcanized fiber。# k. S) u' z$ h2 k3 e2 z) B
UL153:; ~1 j; x& i- h: N' N* g
25 Insulating Materials
+ z& P" f; j3 ~5 v6 Z; `25.2 An insulating lining or barrier of vulcanized fiber or similar materials used where spacing does not
8 H t5 f: c7 e# H- K, _: xotherwise comply with the requirement shall not be less than 1/32 inch (0.8 mm) thick, and shall be so( B0 n5 Z& I3 S2 |2 H4 D! z+ P0 o1 K
located that it is not adversely affected by arcing, except that vulcanized fiber not less than 1/64 inch (0.4 mm) thick is able to be used in addition to an air spacing of not less than 50 percent of the spacing required for air alone. |
评分
-
查看全部评分
|