Terex TC29, Operating Instructions Manual

Page: 17 / 96

Safety and Prevention of Accidents 2
TC29
11
2.13 Working in the vicinity of overhead power
lines
When the earth-moving machine is being used in
the vicinity of overhead power lines and trolley
wires, a safety distance which varies depending
upon the nominal voltage of the overhead line
must be maintained between the lines and the
earth-moving machine and its work equipment, in
order to prevent current overspill. This also applies
to the distance between these lines and attached
implements or loads.
The safety distances specified below must be
complied with:
Nominal voltage
in Volt
Safety distance in
meters
- 1,000 V 1.0 m
over 1 kV - 110 kV 3.0 m
over 110 kV - 220 kV 4.0 m
over 220 kV - 380 kV 5.0 m
nom. voltage unknown 5.0 m
In the observation of safety distances, all working
movements of earth-moving machines, e.g.
positions of the work equipment and the
dimensions of attached loads must be taken into
consideration. Uneven ground which would cause
the earth-moving machine to be inclined and thus
nearer to overhead lines must also be taken into
account.
During work in windy conditions, both overhead
lines and work equipment may swing out, thus
reducing the safety distance.
If it is impossible to maintain sufficient distance
from overhead power lines and trolley wires, the
plant operator must consult with the proprietor or
operator of the overhead lines to find other safety
precautions to prevent current overspill. Such
measures could be e.g.
•
Switching off the current
•
Re-routing the overhead line
•
Cabling, or
•
Limiting the work zone of earth-moving
machines
2.14 Operation in closed rooms
If earth-moving machines are to be used in closed
rooms, these areas must be sufficiently ventilated
and special regulations observed.
2.15 Work stoppages
Before rest periods and at the end of the working
day, the driver of the earth-moving machine must
park the machine on ground which has sufficient
carrying capacity and is as level as possible, and
must secure it against unintended movement.
Before rest periods and at the end of the working
day, the driver must lower the work equipment onto
the ground or secure it so that it cannot move
about.
The driver is not to leave the earth-moving
machine when the work equipment has not been
lowered to the ground or secured.
Earth-moving machines are only to be parked in
places where they do not present an obstacle, e.g.
on the construction site or to plant traffic. Warning
devices, e.g. triangles, warning cordons, flashing
or hazard lights are to be used if necessary.
Before leaving the operator stand, the driver must
bring all operating equipment into home position,
switch off the working hydraulics and apply the
brakes.
If the driver is leaving the earth-moving machine
unattended, he must first turn off the drive motors
and ensure that they cannot be started up by
unauthorized persons (e.g. removing ignition keys).