Manitowoc Published 12-10-19, Control # 258-05 2-15
MLC90A-1/MLC100-1 OPERATOR MANUAL SAFETY INFORMATION
ASSEMBLING, DISASSEMBLING, OR
OPERATING CRANE NEAR ELECTRIC
POWER AND TRANSMISSION LINES
Electrocution Hazard
Thoroughly read, understand, and abide by all applicable
federal, state, and local regulations regarding operation of
cranes near electric power lines or equipment.
United States federal law prohibits the use of
cranes closer than 6 m (20 ft) to power sources up
to 350 kV and greater distances for higher
voltages unless the line’s voltage is known
[29CFR1910.180 and 29CFR1926.1400].
To avoid death or serious injury, Manitowoc
recommends that all parts of the crane, boom,
and load be kept at least 6 m (20 ft) away from all
electrical power lines and equipment less than
350 kV.
NOTE For detailed guidelines on operating near power
lines, refer to the current edition of OSHA
29CFR1926.1400 and ASME B30.5 American
National Standard.
1. Keep all personnel and their personal belongings
(clothing, water coolers, lunch boxes, etc.) away from
the crane if it is being operated near electrical power
lines or equipment.
2. Before operating the 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.
The crane is NOT INSULATED. Always consider all
parts of the load and the crane as conductors, including
the wire rope, pendants or straps, and taglines.
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 section must be followed at all times,
even if the electrical power lines or equipment have
been de-energized.
3. Crane operation is dangerous when close to an
energized electrical power source. Exercise extreme
caution and prudent judgment. Operate slowly and
cautiously when in the vicinity of power lines.
4. If the load, wire 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.
The safest way to avoid electrocution is to stay away
from electrical power lines and electrical power sources.
5. The operator is responsible for alerting all personnel to
the dangers associated with electrical power lines and
equipment. The crane is not insulated. 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, taglines, or rigging
gear.
6. Even if the crane operator is not affected by an electrical
contact, others in the area may become seriously injured
or killed.
7. 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
1. During crane use, assume that every line is energized
(“hot” or “live”) and take necessary precautions.
2. Position the crane 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 and all attachments.
Overhead lines tend to blow in the wind, so allow for
movement of the overhead lines when determining a
safe operating distance.
3. Erect a suitable barricade to physically restrain the
crane, all attachments, and the load from entering into
an unsafe distance from electrical power lines or
equipment.
4. Plan ahead and always plan a safe route before
traveling under power lines. A wooden clearance frame
should be constructed to ensure sufficient clearance is
maintained between crane and power lines.
5. Appoint a reliable and qualified signal person, equipped
with a loud signal whistle or horn and voice
communication equipment, to warn the operator when
any part of the crane or load moves near a power
WARNING
Electrocution Hazard!
Manitowoc cranes are not equipped with all features
required to operate within OSHA 29CFR1926.1408,
Table A clearances when the power lines are energized.
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