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.
Equipotential bonding
Bonding of all metallic objects in the surrounding area should be considered.
However, metallic objects bonded to the work piece will increase the risk that the
operator could receive an electric shock by touching these metallic objects and
the electrode at the same time. The operator should be insulated from all such
bonded metallic objects.
Earthing of the workpiece
Where the workpiece is not bonded to earth for electrical safety, nor connected to
earth because of its size and position, for example, 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 workpiece
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 a 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.
Screening and shielding
Selective screening and shielding of other cables and equipment in the surrounding
area may alleviate problems of interference. Screening of the entire welding area
may be considered for special applications.
