|
7.10 An opening in the enclosure that has a minor dimension of less than 1 inch (25.4 mm) is acceptable/ T+ \3 Q5 \( j- b. p$ v5 `
if a probe as illustrated in Figure 7.2, inserted through the opening, cannot be made to touch any
/ n6 ]2 K3 ?. c3 ^3 d7 puninsulated live part of film–coated wire that involves the risk of electric shock. The probe shall be applied
( E7 S1 R2 _# ^& |; d& _# bin all possible articulated positions before, during, and after insertion.
4 T$ s- i/ S. q& V5 b5 C" p7.11 An opening that has a minor dimension of 1 inch (25.4 mm) or more, in an enclosure, as illustrated2 x g' V5 N3 {* P5 N0 ]
in Figure 7.3, is acceptable if, within the enclosure, there is no uninsulated live part or film-coated wire
. _' l6 N* A3 a9 C) W7 Gless than;
5 P3 \+ @" C# i8 l, W9 g4 E$ za) R distance from the inside edge of the perimeter of the opening and- Z1 ~0 M( ~2 M. r. c
b) X distance from the plane of the opening.
5 S' E' S/ T* A+ `8 C) gT equals the enclosure thickness, R equals X minus T, and X equals 5 times the diameter of the largest2 Y, v7 ]6 \5 D0 E+ A2 W& }
round rod that can be inserted through the opening but not less than 6-1/16 inches (154 mm). In+ r7 h; F( y9 K" D
evaluating an opening, any barrier located within the volume is to be ignored unless it intersects the
8 d: a4 z* f" L/ Gboundaries of the volume in a continuous, closed line., ] Q) m$ r4 R4 {& l, C
# r0 ~3 V1 V! s) J5 R. [2 T5 U$ |
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?
+ U. w+ t0 P9 G6 G; f( d# C0 g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
1 G! z9 w4 z+ M8 t B,从开口平面算起的X距离间。X=MAX.(5*Rod直径,154mm) |
|