Yanmar B95W - Working in the Vicinity of Underground Power Lines; Working in the Vicinity of Overhead Power Lines

B95W
Safety
03_Sicherheit_en.fm - V 0.1 - 1.8.17
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3.15 Working in the vicinity of underground power
lines
 Before commencing excavation work using the machine, it must be determined
whether any underground power lines are present in the intended working
zone which may present a danger to persons.
 If underground power lines are present, their exact position and course must
be determined in consultation with the proprietor or operator of the lines, and
the necessary safety precautions decided and implemented.
 Before starting any earth work, clearly mark the route of lines in the
construction site area while under supervision. If the position of lines cannot
be determined, search ditches must be dug - manually, if need be.
 If any underground power lines or their protective coverings are encountered
unexpectedly or damaged, stop work immediately and inform the supervisor.
 In case of arcing, adhere to BGR 500 K.2.12, 3.12.
 Maintain a safe distance from the power lines.
3.16 Working in the vicinity of overhead power lines
If the machine is being used in the vicinity of overhead power lines and trolley
wires, a safety distance (which varies depending on the nominal voltage of the
overhead line) must be maintained between the lines and the machine and its
work equipment, to prevent current overspill. This also applies to the distance
between these lines and attachments or loads.
Prescribed
safety distance
The safe distance depends on the nominal voltage of the overhead power line.
Tab. 3-3 Prescribed safety distances
Nominal voltage Safety distance
0 to 50 kV 3 m
over 50 to 200 kV 4.6 m
over 200 to 350 kV 6.1 m
over 350 kV to 500 kV 7.6 m
over 500 kV to
750 kV 10.7 m
over 750 kV to 1,000 kV 13.7 m
Unknown min. 13.7 m