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22.12 Handles, knobs, grips, levers and similar parts shall be fixed in a reliable manner so that they will not work loose in normal use if loosening could result in a hazard. If these parts are used to indicate the position of switches or similar components, it shall not be possible to fix them incorrectly if this could result in a hazard.
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7 P, `0 l; v( ]( f3 @NOTE Sealing compound and similar materials, other than self-hardening resins, are not considered to be adequate to prevent loosening.7 f0 Z. u( R f9 F0 Z' _
1 F7 F/ K) Z2 s3 B7 F: Q$ {# rCompliance is checked by inspection, by manual test and by trying to remove the part by applying an axial force of
; ]8 x1 r; R2 f7 x* _2 F– 15 N, if an axial pull is unlikely to be applied in normal use;3 B+ I) J9 S8 N/ y5 U
– 30 N, if an axial pull is likely to be applied in normal use.
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3 B' }4 b% _3 o: QThe force is applied for 1 min. |
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