21.21 Tools shall be so designed that in normal use there is no risk of electric shock from charged
capacitors when touching the pins of the plug. Capacitors, having a rated capacitance less than or equal
to 0,1 µF, are not considered to entail a risk of electric shock.
Compliance is checked by the following test, which is made 10 times.
The tool is operated at rated voltage.
The tool switch, if any, is then moved to the
″
off
″
position and the tool is disconnected from the supply by
means of the plug.
One second after disconnection, the voltage between the pins of the plug is measured with an instrument
which does not appreciably affect the value to be measured.
The voltage shall not exceed 34 V.
21.22 Non-detached parts, which provide the necessary degree of protection against electric shock,
moisture, or contact with moving parts, shall be fixed in a reliable manner, and shall withstand the
mechanical stress occurring in normal use.
Snap-in devices used for fixing such parts shall have an obvious locked position. The fixing properties of
snap-in devices used in parts which are likely to be removed during servicing shall not deteriorate.
Compliance is checked by the following tests.
Parts which are likely to be removed during servicing are disassembled and assembled 10 times before
the test is carried out.
Servicing includes replacement of the supply cord.
The tool is at room temperature. However, in cases where compliance may be affected by temperature,
the test is also carried out immediately after the tool has been operated under the conditions specified in
clause 12.
The test is applied to all parts which are likely to be detachable, whether or not they are fixed by screws,
rivets, or similar parts.
A force is applied without jerks for 10 s in the most unfavourable direction to those areas of the cover or
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