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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
) V+ `& R3 ^; ?4 p# a; Eif a probe as illustrated in Figure 7.2, inserted through the opening, cannot be made to touch any" `9 V6 `# @3 v' K3 _
uninsulated live part of film–coated wire that involves the risk of electric shock. The probe shall be applied
9 H5 T0 t& e J" |# Gin all possible articulated positions before, during, and after insertion.
+ s. Y6 |: C8 o5 D4 y* Z7.11 An opening that has a minor dimension of 1 inch (25.4 mm) or more, in an enclosure, as illustrated2 g8 v! g& _" g" f8 @) _! b; E/ c
in Figure 7.3, is acceptable if, within the enclosure, there is no uninsulated live part or film-coated wire' o5 _' K: ?: _' L( \
less than;9 F# d, q( k+ a& X7 Q1 W2 ]
a) R distance from the inside edge of the perimeter of the opening and- h% Z1 N# O: q! j
b) X distance from the plane of the opening.: O5 P* L; c& o; i
T equals the enclosure thickness, R equals X minus T, and X equals 5 times the diameter of the largest) V( u1 W/ R3 \1 @8 U, k* r. [
round rod that can be inserted through the opening but not less than 6-1/16 inches (154 mm). In' K _* f4 ^# v" q! T
evaluating an opening, any barrier located within the volume is to be ignored unless it intersects the( \1 A0 H i' G5 T" w( |
boundaries of the volume in a continuous, closed line.0 W5 ^+ e" O) j, x" E# M
/ T) n; W/ G8 E7 p& K7.11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?
$ Z0 M9 ~. K. `" Q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# Z0 S7 P }8 `; L4 } P
B,从开口平面算起的X距离间。X=MAX.(5*Rod直径,154mm) |
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