INARC-1000 I/ 1250 I
·２５·
5) Earthling of the work piece
Where the work piece is nor bonded to earth for electrical safety, nor connected to earth
because of its size and position, for example ships hull or building steelwork, a connection
bonding the work piece to earth may reduce emissions in some, but not all instances. Care
should be taken to prevent the earthling of the work piece increasing the risk of injury to
users, or damage to other electrical equipment. Where necessary, the connection of the
work piece to earth should be made by a direct connection to the work piece, but in some
countries where direct connection is not permitted, the bonding should be achieved by
suitable capacitance, selected according to national regulations.
6) 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.
