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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.2 b9 U$ A$ j" u
( B5 j& z4 ~3 ENOTE Sealing compound and similar materials, other than self-hardening resins, are not considered to be adequate to prevent loosening.
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' }8 X% o7 r+ NCompliance is checked by inspection, by manual test and by trying to remove the part by applying an axial force of
F* u" B; C6 m1 ?" w– 15 N, if an axial pull is unlikely to be applied in normal use; q2 m" y7 ~( b7 R# h8 s! ?2 |$ u. {0 k
– 30 N, if an axial pull is likely to be applied in normal use., q4 D% l% o9 u' c7 a) o
4 F: n( k. K1 qThe force is applied for 1 min. |
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