Clarke MIG85ENB Specifications download pdf (Page 5)

take additional precautions such as filtering of the mains supply. Consideration

should be given to shielding the supply cable of permanently installed welding

equipment, in metallic conduit or equivalent. 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.

2.2 Maintenance of the welding equipment

The welding equipment should be routinely maintained according to the

manufacturers 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 manufacturers instructions. In particular,

the spark gaps of arc striking and stabilizing devices should be adjusted and

maintained according to the manufacturers recommendations.

2.3 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.

2.4 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 these

metallic components and the electrodes at the same time. The operator should

be insulated from all such bonded metallic components.

2.5 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. ships 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.

2.6 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.

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Clarke MIG85ENB Specifications Page 5