WARNING: For reasons of safety, always follow these safety precautions. 7. PRECAUTIONS DURING OPERATION PC450-ENG 1-12 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. INCORRECT INCORRECT PROHIBITED OPERATIONS 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 Min. safety distance 6.6 kV 3 m 10 ft 33.0 kV 4 m 14 ft 66.0 kV 5 m 17 ft 154.0 kV 8 m 27 ft 275.0 kV 10 m 33 ft DO NOT GO CLOSE TO HIGH-VOLTAGE CABLES