Electromagnetic Compatibility (EMC)
Spirit200a User’s Manual Rev J
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A-3
Plasma Cutting Cables
The plasma cutting 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 components in the plasma cutting installation and
adjacent to it should be considered. However, metallic components
bonded to the workpiece will increase the risk that the operator could
receive a shock by touching these metallic components and the electrode
at the same time. The operator should be insulated from all such bonded
metallic components.
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, 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 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 installation may be considered for special applications.
