Komatsu WA500-6H Operation & Maintenance Manual page 40

2.2 General precautions
Take action to prevent unauthorized people from approach-
ing the jobsite.
Working on loose ground
Avoid travelling or operating your machine too close to the
edge of cliffs, overhangs and deep ditches. The ground may
be week in such areas. If the ground should collapse under
the weight of vibration of the machine, there is a hazard that
the machine may fall or tip over. Remember that the soil
after heavy rain or blasting or after earthquakes is weak in
these areas.
When working on embankments or near excavated ditches,
there is a hazard that the weight or vibration of the machine
will cause the soil of collapse. Before starting operations,
take steps to ensure that the ground is safe and to prevent
the machine from rolling over or falling.
Do not go close to high-voltage cables
Do not travel or operate the machine near electric cables. There
is a hazard of electric shock, which may cause serious injury or
property damage. On jobsites where the machine may go close
to electric cables, always do as follows.
Before starting work near electric cables, inform the local
power company of the work to be performed, and ask them
to take the necessary action.
Even going close to high-voltage cables can cause electric
shock, which may cause serious burns or even death.
Always maintain a safe distance (see the table on the right)
between the machine and the electric cable. Check with the
local power company about safe operating procedure before
starting operations.
To prepare for any possible emergencies, wear rubber
shoes and gloves. Lay a rubber sheet on top of the seat, and
be careful not to touch the chassis with any exposed part of
your body.
Use a signalman to give warning if the machine approaches
too close to the electric cables.
When carrying out operations near high voltage cables, do
not let anyone come close to the machine.
If the machine should come too close or touch the electric
cable, to prevent electric shock, the operator should not
leave the operator's compartment until it has been confirmed
that the electricity has been shut off.
Also, do not let anyone come close to the machine.
2-14
Nominal Voltage
up to 1000 V
over 1 kV up to 110 kV
over 110 kV up to 220 kV
over 220 kV up to 380 kV
with unknown nominal voltage
Safety
GK032047
Safety
Distance
1 m
3 m
4 m
5 m
5 m
WA500-6H – VEAM430100