5.6 The tests are made in a draught-free location and, in general, at an ambient temperature of (20
±
5)°C.
If the temperature attained by any part is limited by a temperature sensitive device, or is influenced by the
temperature, the room temperature is, in case of doubt, maintained at (23
±
2)°C.
5.7.1 Tools for a.c. only are tested with a.c. at rated frequency, if marked, and those for a.c./d.c. are
tested at the more unfavourable supply.
Tools for a.c. which are not marked with rated frequency, or marked with a frequency range of 50 Hz to
60 Hz, are tested with either 50 Hz or 60 Hz, whichever is the more unfavourable.
5.7.2 Tools having more than one rated voltage are tested on the basis of the most unfavourable voltage.
When it is specified for tools marked with a rated voltage range that the supply voltage is equal to the
rated voltage multiplied by a factor, the supply voltage is equal to:
– the upper limit of the rated voltage range multiplied by this factor, if greater than 1;
– the lower limit of the rated voltage range multiplied by this factor, if smaller than 1.
When a factor is not specified, the supply voltage is the most unfavourable within the rated voltage range.
For tools having more than one rated voltage or rated voltage range, it may be necessary to make some
of the tests at the minimum, the mean, and the maximum values of the rated voltage, or the rated voltage
range, in order to establish the most unfavourable voltage.
5.7.3 For tools marked with a rated voltage range and rated input corresponding to the mean of the rated
voltage range, when it is specified that the power input is equal to rated input multiplied by a factor, the
input is equal to:
– the calculated input corresponding to the upper limit of the rated voltage range multiplied by
this factor, if greater than 1:
– the calculated input corresponding to the lower limit of the rated voltage range multiplied by
this factor, if smaller than 1.
When a factor is not specified, the input corresponds to the input at the most unfavourable rated voltage
within the range.
5.8 When alternative attachments are made available for the tool by its manufacturer, the tool is tested
with those attachments which give the most unfavourable results.
5.9 Unless otherwise specified, tools are tested with the appropriate flexible cord connected to the tool.
5.10 If class I tools have accessible metal parts which are not connected to an earthing terminal or
earthing contact, and are not separated from live parts by an intermediate metal part which is connected
to an earthing terminal or earthing contact, such parts are checked for compliance with the appropriate
requirements specified for class II construction.
If class I tools have accessible non-metallic parts, such parts are checked for compliance with the
appropriate requirements specified for class II construction, unless these parts are separated from live
parts by an intermediate metal part connected to an earthing terminal or earthing contact.
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