Komatsu WA470-6 2006, Operation & Maintenance Manual

Page: 45 / 392

Safety 2.2 General precautions
WA470-6H – VEAM946100
2-17
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.
GK032047
Nominal Voltage
Safety
Distance
up to 1000 V 1 m
over 1 kV up to 110 kV 3 m
over 110 kV up to 220 kV 4 m
over 220 kV up to 380 kV 5 m
with unknown nominal voltage 5 m