Tweco 350 4R Wirefeeder - Manual (Page 23)

3-3 Manual 0-5182
installation weldskill 250, 350
Installation
B. Maintenance of Welding Equipment
The welding equipment should be routinely maintained
according to the manufacturer’s recommendations. All
access and service doors and covers should be closed
and properly fastened when the welding equipment
is in operation. The welding equipment should not
be modified in any way except for those changes and
adjustments covered in the manufacturer’s instruc-
tions. In particular, the spark gaps of arc striking and
stabilizing devices should be adjusted and maintained
according to the manufacturer’s recommendations.
C. Welding Cables
The welding cables should be kept as short as possible
and should be positioned close together, running at
or close to the floor level.
D. Equipotential Bonding
Bonding of all metallic components in the welding
installation and adjacent to it should be considered.
However. Metallic components bonded to the work
piece will increase the risk that the operator could
receive a shock by touching the metallic components
and the electrode at the same time. The operator
should be insulated from all such bonded metallic
components.
E. Earthing of the Workpiece
Where the workpiece is not bonded to earth for electri-
cal safety, nor connected to earth because of it’s size
and position, e.g. ship’s hull or building steelwork,
a connection bonding the workpiece to earth may
reduce emissions in some, but not all instances. Care
should be taken to prevent the earthing of the work-
piece increasing the risk of injury to users, or damage
to other electrical equipment. Where necessary, the
connection of the workpiece to earth should be made
by direct connection to the workpiece, but in some
countries where direct connection is not permitted, the
bonding should be achieved by suitable capacitance,
selected according to national regulations.
F. Screening and Shielding
Selective screening and shielding of other cables
and equipment in the surrounding area may allevi-
ate problems of interference. Screening the entire
welding installation may be considered for special
applications.