Specifications

Transarc 141VRD, 161VRD
7
Shielding should be electrically continuous throughout its length. The shielding should be
connected to the Welding Power Source so that good electrical contact is maintained between
the conduit and the Welding Power Source enclosure.
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
instructions. In particular, the spark gaps of arc striking and stabilising 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 electrical 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 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 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
alleviate problems of interference. Screening the entire welding installation may be
considered for special applications.