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4.3.2 Handles and manual controls
U) P9 v0 p$ n, e+ xHandles, knobs, grips, levers and the like shall be reliably fixed so that they will not work loose
2 C) j! r7 Z+ l0 S4 P3 @) Cin normal use, if this might create a hazard. Sealing compounds and the like, other than, T# [" b( X* i& X1 }# q
self-hardening resins, shall not be used to prevent loosening.. D6 B$ Z5 ]+ I
If handles, knobs and the like are used to indicate the position of switches or similar
6 ^7 L& d% c! v9 @5 I+ K2 @components, it shall not be possible to fix them in a wrong position if this might create a hazard.& Q8 T- i( `* m8 z: E" S
Compliance is checked by inspection, by manual test and by trying to remove the handle, knob,& q( k- O/ J3 v& j1 L" S8 E
grip or lever by applying for 1 min an axial force as follows.
- i4 a5 A0 y% |- q3 e7 U' l7 `9 IIf the shape of these parts is such that an axial pull is unlikely to be applied in normal use, the
8 P+ S4 [2 ^6 }6 y. nforce is:" i7 }8 z. N/ k. K- ?
– 15 N for the operating means of electrical components; and) y) w) U, _: D8 T
– 20 N in other cases., s6 C) R4 p; d# d. e
If the shape is such that an axial pull is likely to be applied, the force is:) _7 V8 H& ]# v. I7 I
– 30 N for the operating means of electrical components; and
1 E, c4 f$ q$ A! u– 50 N in other cases. |
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发表于 2015-4-7 11:29
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