|
7.10 An opening in the enclosure that has a minor dimension of less than 1 inch (25.4 mm) is acceptable
6 Q5 i+ s$ S' C( r( gif a probe as illustrated in Figure 7.2, inserted through the opening, cannot be made to touch any
* \7 E7 p$ o w. K9 A9 C5 i7 Euninsulated live part of film–coated wire that involves the risk of electric shock. The probe shall be applied) D2 @; |- O1 j' V# S3 Z0 w8 v3 I6 B
in all possible articulated positions before, during, and after insertion.% S6 Y' b: E$ u1 Z/ L4 g
7.11 An opening that has a minor dimension of 1 inch (25.4 mm) or more, in an enclosure, as illustrated! |0 A9 f) c) G' y1 r
in Figure 7.3, is acceptable if, within the enclosure, there is no uninsulated live part or film-coated wire
g, r% L& q! y! nless than;, X- O1 ]; b) U
a) R distance from the inside edge of the perimeter of the opening and+ `; b- b o. A
b) X distance from the plane of the opening.& ]& e' [* q. k1 z6 T2 f
T equals the enclosure thickness, R equals X minus T, and X equals 5 times the diameter of the largest
$ }8 Q+ s; n7 tround rod that can be inserted through the opening but not less than 6-1/16 inches (154 mm). In% \: \; r O* y5 z5 D: K
evaluating an opening, any barrier located within the volume is to be ignored unless it intersects the1 W9 F5 J+ h% T
boundaries of the volume in a continuous, closed line.3 ^9 n7 N6 y$ R% p4 I" ]# O
6 u5 z8 k2 T3 v: t- h
7.11是否说在一个符合7.3描述的外壳上,当有大于或等于25.4mm的开口时,如果在外壳的以下范围内没有uninsulated live part or film-coated wire的是可以接受的?
7 S5 f Q0 B( I这个范围是:A,从开口内边角算起的R距离间。R=外壳厚度+X
. Z# y5 G A/ m9 K" J B,从开口平面算起的X距离间。X=MAX.(5*Rod直径,154mm) |
|