Danger Of Falling Objects; Working In The Vicinity Of Overhead Power Lines; Working In The Vicinity Of Underground Power Lines - Terex TL120 Operating Instructions Manual

2.12 Danger of falling objects

Earth-moving machines are only to be used where
there is a danger of falling objects if the operator's
stand has a canopy (FOPS). A front guard must be
employed if there is a risk of materials breaking
through into the cab.
In front of walls e.g. of stacked materials, earth-
moving machines must be positioned and operated in
such a way that the driver's seat and entry to the
driver's seat are not situated on the side facing the
wall.
Demolition work is only to be performed by earth-
moving machines where there is no danger to
persons and where the machine is equipped with a
canopy, cab-mounted front guard and appropriate
operating equipment.
See regulations book "Demolition work" (ZH 1/614)
published by the Tiefbau-Berufsgenossenschaft
(Civil Engineering Employer's Liability Insurance
Association).
2.13 Working in the vicinity of
underground power lines
Before commencing excavating work using earth-
moving machines, 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.
The course of power lines in the work area must be
clearly marked, under supervision, before
commencing any earth-moving work. If the position of
lines cannot be determined, search ditches must be
dug - manually, if needed.
If underground power lines are encountered
unexpectedly or they or their protective covers are
damaged, the machine operator must discontinue
work immediately and notify the supervisor.
Operating Instructions Wheel Loader TL120
Safety and Accident Prevention
2.14 Working in the vicinity of overhead
power lines
If the earth-moving 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 earth-moving
machine and its work equipment, to prevent current
overspill. This also applies to the distance between
these lines and attached implements or loads.
The safety distances specified below must be
complied with.
Nominal voltage
in kV
– 1
> 1 to 110
> 110 to 220
> 220 to 380
unknown nominal voltage
Table 2 prescribed safety distances
In the observation of safety distances, all working
movements of earth-moving machines, e.g. positions
of the work equipment and the dimensions of
attached loads must be taken into consideration.
Uneven ground which would cause the earth-moving
machine to be inclined and thus nearer to overhead
lines must also be taken into account.
Both overhead lines and operating equipment may
swing out in windy conditions, thus reducing the
safety distance.
If it is impossible to maintain sufficient distance from
overhead power lines and trolley wires, the plant
operator must consult with the proprietor or operator
of the overhead lines to find other safety precautions
to prevent current overspill. Such measures could
include
– switching off the power,
– re-routing the overhead line,
– cabling, or
– limiting the operating zone of earth-moving
machines
2
Safety distance
in meters
1.0
3.0
4.0
5.0
5.0
17