Komatsu PC400LC-5 Operation & Maintenance Manual page 24

7. PRECAUTIONS DURING OPERATION
A WARNING: For reasons of safety, always
follow these safety precautions.
j PROHIBITED OPERATIONS 1
l Do not
dig the
work face under an overhang. This may cause the overhang to collapse and fall
on top of the machine.
l Do not carry out deep digging under the front of the machine. The ground under the machine may
collapse and cause the machine to fall.
INCORRECT
INCORRECT
DO NOT GO CLOSE TO HIGH-VOLTAGE CABLES
l Going close to high-voltage cables can cause electric shock. Always maintain the safe distance
given below between the machine and the electric cable.
l The following actions are effective in preventing accidents.
1) Wear shoes with rubber or leather soles.
2) Use a signalman to give warning if the machine approaches too close to the electric cable.
l If the work equipment should touch the electric cable, the operator should not leave the operator's
compartment.
l When carrying out operations near high voltage cables, do not let anyone come close to the
machine.
l Check with the electricity company about the voltage of the cables before starting operations.
Voltage
6.6 kV
33.0 kV
66.0 kV
154.0 kV
275.0 kV
Min. safety
distance
3m IOft
4m
14ft
5m 17ft
8m 27ft
10 m 33ft
AE081260
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