Do Not Go Close To High-Voltage Cables; Ensure Good Visibility; Checking Signs And Signalman's Signals - Komatsu PC220LC -8 Operation & Maintenance Manual

SAFETY

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 personal
injury or death. 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 near 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 near the machine.

ENSURE GOOD VISIBILITY

This machine is equipped with mirrors and cameras to ensure good visibility, but even then there are places that
cannot be seen from the operator's seat, so be careful when operating.
When traveling or carrying out operations in places with poor visibility, it is impossible to check for obstacles in the
area around the machine and to check the condition of the jobsite. This leads to danger of serious personal injury
or death. When traveling or carrying out operations in places with poor visibility, always observe the following.
Position a signalman if there are areas where the visibility is not good.
Only one signalman should give signals.
When working in dark places, turn on the working lamp and front lamps installed to the machine, and set up
additional lighting in the work area if necessary.
Stop operations if the visibility is poor, such as in mist, snow, rain, or dust.
When checking the mirrors installed to the machine, remove all dirt and adjust the angle of the mirror to ensure
good visibility.
If the machine is equipped with cameras, clean off any dirt from the lens and make sure that the camera gives
a clear view.

CHECKING SIGNS AND SIGNALMAN'S SIGNALS

Set up signs to inform of road shoulders and soft ground. If the visibility is not good, position a signalman if
necessary. Operators should pay careful attention to the signs and follow the instructions from the signalman.
Only one signalman should give signals.
Make sure that all workers understand the meaning of all signals and signs before starting work.
PRECAUTIONS FOR OPERATION
Voltage of Cables
100V - 200V
6,600V
22,000V
66,000V
154,000V
187,000V
275,000V
500,000V
Safety Distance
Over 2 m (7 ft)
Over 2 m (7 ft)
Over 3 m (10 ft)
Over 4 m (14 ft)
Over 5 m (17 ft)
Over 6 m (20 ft)
Over 7 m (23 ft)
Over 11 m (36 ft)
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