|
|
Compliance is checked by inspection and measurement. Except for that portion of the side of
1 t$ h2 O/ ]( u# y" H' [& za FIRE ENCLOSURE that is subject to the requirements of 4.6.2 (see above paragraph), any one {; p1 C* g6 G3 ^
of the following is considered to satisfy the requirements (other constructions are not
/ E) E0 P0 _0 B; t; x. e% z rexcluded):
9 ?5 T2 \+ i+ Y! b− openings that do not exceed 5 mm in any dimension;* m' l3 x: j& F. g/ |& }/ o
− openings that do not exceed 1 mm in width regardless of length;
$ _% Z6 }& ^ P+ d! f− top openings in which vertical entry is prevented (see Figure 4B for examples);& N6 }3 t. a% s. R
− side openings provided with louvres that are shaped to deflect outwards an external P% L* Y% E5 Z. Z+ l2 g3 K
vertically falling object (see Figure 4C for examples);1 Q% g3 A( }& e- L* [
− top or side openings, as shown in Figure 4D, that are not located vertically, or within a
$ @( D: y, e9 Avolume V bounded by a 5° vertical projection up to the size of opening L, above bare
7 u$ w: x/ M& N/ `' m3 Zconductive parts:
1 a) w, y8 N* e• at HAZARDOUS VOLTAGE, or
$ K0 Y; ?: R3 I/ x$ W5 @9 V k• that present an energy hazard within the meaning of 2.1.1.5.
' H- x4 c, R' s# e2 X+ Q% c
0 I; s7 F7 f' o V; K0 U' w画重点：
7 ~& V _4 @$ j7 P- t, N! dany one' v0 G z5 U4 `3 P: U4 `7 J
of the following is considered to satisfy the requirements (other constructions are not( \# N9 ^! C' v# z% \
excluded) |
|
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2017-5-6 15:41
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡