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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 acceptable
1 C( H* |' g6 a0 }, l3 @* b' c; P) ^if a probe as illustrated in Figure 7.2, inserted through the opening, cannot be made to touch any6 v) s& n4 H, E' |1 t; G
uninsulated live part of film–coated wire that involves the risk of electric shock. The probe shall be applied
. q* {, }% |; Y! P# N; g& gin all possible articulated positions before, during, and after insertion.
7 H. s) H+ @) E" c7.11 An opening that has a minor dimension of 1 inch (25.4 mm) or more, in an enclosure, as illustrated# H: x3 J4 P; [$ f8 Q1 ^4 f& I
in Figure 7.3, is acceptable if, within the enclosure, there is no uninsulated live part or film-coated wire8 r9 T9 D: N# n- S+ ~& g5 X7 z
less than;) ~8 V5 p0 c1 @4 m- p6 b$ D% K
a) R distance from the inside edge of the perimeter of the opening and4 S, S5 {9 N3 P5 S' E
b) X distance from the plane of the opening.
0 Q- H( h3 D# n) v( AT equals the enclosure thickness, R equals X minus T, and X equals 5 times the diameter of the largest
z& u0 a0 B( xround rod that can be inserted through the opening but not less than 6-1/16 inches (154 mm). In) l& _, @- N+ a
evaluating an opening, any barrier located within the volume is to be ignored unless it intersects the7 H% W6 @5 d$ p, b
boundaries of the volume in a continuous, closed line.2 w2 {6 ? ^" b+ i7 l4 B! e l2 ]7 c
7 J& j0 }2 ~, q. v0 N$ f: E7.11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?
+ A0 O) J0 f" l" @" 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
, C) ]4 y _- S. M' Q- q$ Q# m B,从开口平面算起的X距离间。X=MAX.(5*Rod直径,154mm) |
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