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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 Q+ _. w$ R5 p& O0 o; T* L
if a probe as illustrated in Figure 7.2, inserted through the opening, cannot be made to touch any3 R) l% C$ S0 m! ?1 }3 P
uninsulated live part of film–coated wire that involves the risk of electric shock. The probe shall be applied: e1 C1 B. r+ u
in all possible articulated positions before, during, and after insertion.
! r9 t* J& q) ]! u. R7.11 An opening that has a minor dimension of 1 inch (25.4 mm) or more, in an enclosure, as illustrated M6 s: M7 a) _
in Figure 7.3, is acceptable if, within the enclosure, there is no uninsulated live part or film-coated wire
& U" X4 t5 {) K3 P9 M' w, Sless than;
+ E2 n. F8 l" n6 x1 Na) R distance from the inside edge of the perimeter of the opening and
* M7 d: V. _6 a/ V- ?) z$ U8 Tb) X distance from the plane of the opening.
3 R; P( b, | }- h- Z! HT equals the enclosure thickness, R equals X minus T, and X equals 5 times the diameter of the largest
9 s; L2 }, y7 o3 Y m9 dround rod that can be inserted through the opening but not less than 6-1/16 inches (154 mm). In. i' A2 ]! y3 J* e
evaluating an opening, any barrier located within the volume is to be ignored unless it intersects the
1 {4 h& C& M" z- P( jboundaries of the volume in a continuous, closed line.1 P! Y' Y! C" T" a
7 O/ b3 y1 E q! D) P0 q7.11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?
+ a: ]* ^# t) t* J) P 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+X3 }4 ~: e5 k" {1 q S9 s# Q
B,从开口平面算起的X距离间。X=MAX.(5*Rod直径,154mm) |
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