Komatsu PC118MR-8, Руководство по эксплуатации и обслуживанию

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SAFETY
SAFETY LABELS
2-27
DISTANCE TO HIGH VOLTAGE CABLES 2
Digging operations near overhead electric lines are extremely
d a n g e r o u s a n d t h e y m a y a l s o c a u s e d e a t h d u e t o
electrocution; for this reason, when working near overhead
electrical lines always respect the minimum safety distances
prescribed by the competent authorities and by the accident-
prevention rules in force.
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As far as underground long-distance lines are concerned,
the minimum distance depends on the covering of the
ducts in which the cables are laid.
DANGER
The minimum distances from overhead lines can vary in
the different countries, according to the climate and to the
humidity percentage in the air.
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Indicatively, the distances indicated in the following table
should be respected.
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The basic safety precautions to be taken to prevent this
risk are the following:
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Wear shoes with thick rubber or leather soles.
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Request the aid of another person who can warn you if
the machine gets too close to the electric line.
q
Operate at low speed.
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Learn what is to be done first in case of electrocution.
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Keep the phone number of the electricity company and
of the nearest first aid station at hand.
q
If the work equipment gets accidentally entangled in the
cables, the operator must not leave the cab until the
electricity company has insulated the line.
q
When carrying out this kind of operations, warn everyone
standing in the work area to keep at the minimum distance
prescribed from the machine and the work equipment.
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Ask the electricity company what are the voltage of the
cables and the minimum safety distance in advance.
Voltage of Cables
Min. safety
distance
1.0 kV (distribution line) 5 m
6.6 kV (2–3 insulators) 5.2 m
33 kV (min. 3 insulators) 5.5 m
66 kV (min. 6 insulators) 6 m
154 kV (min. 10 insulators) 8 m
275 kV (min. 19 insulators) 10 m
WEAM014802