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7.10 An opening in the enclosure that has a minor dimension of less than 1 inch (25.4 mm) is acceptable6 t v) [$ f( e% o( X
if a probe as illustrated in Figure 7.2, inserted through the opening, cannot be made to touch any! F _' {4 K: l k( N6 E$ j
uninsulated live part of film–coated wire that involves the risk of electric shock. The probe shall be applied
$ ?$ y$ a$ `. x% t6 V6 S: T3 iin all possible articulated positions before, during, and after insertion.
0 k o: S, ?) T/ M7.11 An opening that has a minor dimension of 1 inch (25.4 mm) or more, in an enclosure, as illustrated. G6 f; X6 l1 C) [# l5 V" I
in Figure 7.3, is acceptable if, within the enclosure, there is no uninsulated live part or film-coated wire
5 Z7 \+ u& w7 y. z& U' L; n. Qless than;
4 ?) B: V4 `# N8 c. O( za) R distance from the inside edge of the perimeter of the opening and% r* p( b4 X F4 h' J! t0 s
b) X distance from the plane of the opening.: ^% ?8 `) x$ A/ ?4 D0 O
T equals the enclosure thickness, R equals X minus T, and X equals 5 times the diameter of the largest
: a4 N; l7 [! P- Jround rod that can be inserted through the opening but not less than 6-1/16 inches (154 mm). In y8 S) {- t9 x# i
evaluating an opening, any barrier located within the volume is to be ignored unless it intersects the7 W7 K5 u9 L/ c
boundaries of the volume in a continuous, closed line.
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+ F, W; f- M! H& D! O- c+ H5 O7.11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?- U/ z/ f& \- e9 q: X& D
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 b( |) ~3 q: ?/ [8 F
B,从开口平面算起的X距离间。X=MAX.(5*Rod直径,154mm) |
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