held more securely than by hand and both hands
remain free to operate the power tool.
b) Check that the insert tools used are compatible
with the chuck system and that they are secured
in the chuck correctly.
c) Switch the power tool off and unplug the supply
cord in the event of a power failure or inter-
en
ruption in the electric supply. This will prevent
accidental restarting when the electric power re-
turns.
5.2.3 Electrical safety
a) Before beginning work, check the working area
(e.g. using a metal detector) to ensure that
no concealed electric cables or gas and water
pipes are present. External metal parts of the
power tool may become live, for example, when
an electric cable is damaged accidentally. This
presents a serious risk of electric shock.
b) Check the power tool's supply cord at regular
intervals and have it replaced by a qualified
specialist if found to be damaged. If the power
tool's supply cord is damaged it must be re-
placed with a specially-prepared supply cord
available from Hilti Customer Service. Check
extension cords at regular intervals and replace
them if found to be damaged. Do not touch the
supply cord or extension cord if it is damaged
6. Before use
6.1 Use of extension cords and generators or
transformers
Please refer to section 2 "Description".
22
Printed: 07.07.2013 | Doc-Nr: PUB / 5070555 / 000 / 00
while working. Disconnect the supply cord plug
from the power outlet. Damaged supply cords or
extension cords present a risk of electric shock.
c) When working outdoors with an electric tool
check to ensure that the tool is connected to the
electric supply by way of a ground fault circuit
interrupter (RCD) with a rating of max. 30 mA
(tripping current). Use of a ground fault circuit
interrupter reduces the risk of electric shock.
d) Use of a ground fault circuit interrupter (RCD re-
sidual current device) with a maximum tripping
current of 30 mA is recommended.
5.2.4 Work area
a) Ensure that the workplace is well lit.
b) Ensure that the workplace is well ventilated.
Exposure to dust at a poorly ventilated workplace
may result in damage to the health.
5.2.5 Personal protective equipment
The user and any other persons in the vicinity must
wear suitable eye protection, a hard hat, ear pro-
tection, protective gloves and breathing protection
while the tool is in use.