Manitowoc Grove GRT880, Operator'S Manual

Page: 40 / 202

SAFETY INFORMATION GRT880 OPERATOR MANUAL
2-24
Published 3-25-2020, Control # 643-04
Crane operation is dangerous when close to an energized
electrical power source. Exercise extreme caution and
prudent judgement. Operate slowly and cautiously when in
the vicinity of power lines.
Before operating this crane in the vicinity of electrical power
lines or equipment, notify the power utility company. Obtain
positive and absolute assurance that the power has been
turned off.
This crane is not insulated . Always consider all parts of the
load and the crane, including the hoist rope, wire rope,
pendant cables, and tag lines, as conductors. You, the
operator, are responsible for alerting all personnel of
dangers associated with electrical power lines and
equipment. Do not allow unnecessary personnel in the
vicinity of the crane while operating. Permit no one to lean
against or touch the crane. Permit no one, including riggers
and load handlers, to hold the load, load lines, tag lines, or
rigging gear.
If the load, hoist rope, boom, or any portion of the crane
contacts or comes too close to an electrical power source,
everyone in, on, and around the crane can be seriously
injured or killed.
Most overhead power lines are not insulated. Treat all
overhead power lines as being energized unless you have
reliable information to the contrary from the utility company
or owner.
The rules in this Operator Manual must be followed at all
times, even if the electrical power lines or equipment have
been de-energized.
The safest way to avoid electrocution is to stay away from
electrical power lines and electrical power sources.
It is not always necessary to contact a power line or power
source to become electrocuted. Electricity, depending on
magnitude, can arc or jump to any part of the load, load line,
or crane boom if it comes too close to an electrical power
source. Low voltages can also be dangerous.
Set-Up and Operation
During crane use, assume that every line is energized
(“hot” or “live”) and take the necessary precautions.
Set up the crane in a position such that the load, boom, or
any part of the crane and its attachments cannot be moved to
within 6 m (20 ft) of electrical power lines or equipment. This
includes the crane boom (fully extended to maximum height,
radius, and length) and all attachments (boom extensions,
rigging, loads, etc.). Overhead lines tend to blow in the wind
so allow for lines’ movement when determining safe
operating distance.
A suitable barricade should be erected to physically restrain
the crane and all attachments (including the load) from
entering into an unsafe distance from electrical power lines
or equipment.
Plan ahead and always plan a safe route before traveling
under power lines. Rider poles should be erected on each
side of a crossing to assure sufficient clearance is
maintained.