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7. PRECAUTIONS DURING OPERATION
PROHIBITED OPERATIONS
• Do not dig the work face under an overhang. This may cause the overhang to collapse and fall on top of the
machine.
• 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.
DO NOT GO CLOSE TO HIGH-VOLTAGE CABLES
• Going close to high-voltage cables can cause electric shock. Always maintain the safe distance given below
between the machine and the electric cable.
• The following actions are effective in preventing accidents.
1) Wear shoes with rubber of leather soles.
2) Use a signalman to give warning if the machine approaches too close to the electric cable.
• If the work equipment should touch the electric cable, the operator should not leave the operator's compart-
ment.
• When carrying out operations near high voltage cables, do not let anyone come close to the machine.
• 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
1-12
Min. safety
distance
3 m
10 ft
4 m
14 ft
5 m
17 ft
8 m
27 ft
10 m
33 ft
WARNING: For reasons of safety, al-
ways follow these safety precautions.
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