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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.) w2 y8 _1 K h& n" V! S4 W
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NOTE Sealing compound and similar materials, other than self-hardening resins, are not considered to be adequate to prevent loosening.$ ^/ E, O' e$ y. ^' ?
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Compliance is checked by inspection, by manual test and by trying to remove the part by applying an axial force of& I1 A% }5 X6 A5 T' K! M2 R! N7 f4 f
– 15 N, if an axial pull is unlikely to be applied in normal use;: W' k2 f5 T+ A7 W3 `% p) u# h
– 30 N, if an axial pull is likely to be applied in normal use.
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% S2 u, o. _; j x5 Z& y: ?0 u5 GThe force is applied for 1 min. |
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