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Published 11-01-2020 Control # 710-00
SAFETY PRECAUTIONS
NBT60XL OPERATOR MANUAL
necessary to leave the operator’s station,
jump completely
clear of the equipment. Do not step off.
Hop away with
both feet together.
Do not
walk or run.
Following any contact with an energized electrical source,
the National Crane distributor must be immediately advised
of the incident and consulted on necessary inspections and
repairs. Thoroughly inspect the hoist rope and all points of
contact on the equipment. Should the distributor not be
immediately available, contact Manitowoc Crane Care. The
equipment must not be returned to service until it is
thoroughly inspected for any evidence of damage and all
damaged parts are repaired or replaced as authorized by
your National Crane distributor or Manitowoc Crane Care.
Special Operating Conditions and
Equipment
Never operate the equipment during an electrical
thunderstorm.
When operating near transmitter/communication towers
where an electrical charge can be induced into the
equipment or load:
•
The transmitter shall be deenergized OR,
•
Tests shall be made to determine if an electrical charge
will be induced into the equipment or load.
•
The equipment must be provided an electrical ground.
•
If taglines are used, they must be non-conductive.
•
Every precaution must be taken to dissipate induced
voltages. Consult a qualified RF (radio frequency)
Consultant. Also refer to local, state, and federal codes
and regulations.
When operating equipment equipped with electromagnets,
you must take additional precautions. Permit no one to touch
the magnet or load. Alert personnel by sounding a warning
signal when moving a load. Do not allow the cover of the
electromagnet power supply to be open during operation or
at any time the electrical system is activated. Shut down the
equipment completely and open the magnet controls switch
prior to connecting or disconnecting magnet leads. Use only
a non-conductive device when positioning a load. Lower the
magnet to the stowing area and shut off power before
leaving the operator’s cab (if equipped) or operator’s station.
Grounding the Equipment
The equipment may become charged with static electricity.
This may occur especially when using outrigger pads made
of plastic or when the outrigger pads are cribbed with
insulating material (e.g., wooden planks).
Use electrically conducting material for grounding.
1.
Hammer a metal rod (3, Figure 2-5) (length of
approximately 2.0 m (6.6 ft)) at least 1.5 m (5 ft) into the
ground.
2.
Moisten the soil around the metal rod (3) for better
conductivity.
3.
Clamp an insulated cable (2) to the metal rod (3), cross-
section of at least 16 mm² (0.025 in²) (AWG 5).
4.
Connect the free end of the cable with a clamp (1) to a
good electrically conductive location on the frame.
PERSONNEL HANDLING
For equipment that is Dual-Rated as both a crane and an
aerial lift, refer to the Safety Precautions - Aerial Lift section.
WARNING
Risk of accidents due to electric shock!
Ground the equipment before you start to work with it
•
Near strong transmitters (radio transmitters, radio
stations, etc.)
•
Near high-frequency switching stations
•
If a thunder storm is forecast
WARNING
Risk of accidents due to electric shock!
Ensure that the connections between the cable and the
clamp are electrically conductive.
Do not attach the clamp to parts that are screwed on, such
as valves, covers or similar parts.
FIGURE 2-5
Fo
r
Reference
Only
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