L.9 Protection against electric shock
NOTE The title of this clause differs from that of the main standard.
The requirements of 9.1 through 9.4 apply for all conditions along with the following addition:
L.9
Addition
Tools covered by this annex and their battery packs shall be so constructed and enclosed that there is
adequate protection against electric shock.
The clause of the standard applies to tools when they are connected to the mains or are supplied by a
non-isolated source. During the evaluation in this condition, battery packs are to be connected to the tool
in the normal fashion. The tool is also evaluated with the battery pack removed if such removal can be
accomplished without the use of a tool.
L.9.101 For battery packs which may be disconnected from the tool and tools operated under battery
power it shall not be possible to have two conductive, simultaneously accessible parts where the voltage
between them is hazardous unless they are provided with protective impedance.
In the case of protective impedance the short circuit current between the parts shall not exceed 2 mA for
dc or 0,7 mA for ac and there shall not be more than 0,1 µF capacitance directly between the parts.
Compliance for accessibility is checked by applying the test finger of figure 1 to each conductive part.
The test finger of figure 1 is applied without any appreciable force through openings to any depth that the
finger will permit, and it is rotated or angled before, during and after insertion to any position.
If the opening does not allow entry of the finger, the force on the finger in the straight position is increased
to 20 N and the test with the finger bent repeated.
Contact with the test finger is determined with all detachable parts removed and the battery tool operated
in any possible position of normal use.
Lamps located behind detachable covers are not removed providing the lamp may be deenergized by
means of a user operable plug, battery pack disconnection or a switch.
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