5. The health of people around, e.g. the use of pace-makers and hearing aids.
6. Equipment used for calibration and measurement.
7. The time of day that welding or other activities are to be carried out.
8. The immunity of other equipment in the environment: the user shall ensure
that other equipment being used in the environment is compatible: this may
require additional protection measures.
The size of the surrounding area to be considered will depend on the structure of
the building and other activities that are taking place. The surrounding area may
extend beyond the boundaries of the premises.
C. Methods of Reducing Electromagnetic Emissions
1. Mains Supply
Arc cutting equipment should be connected to the mains supply according to
the manufacturer's recommendations. If interference occurs, it may be
necessary to 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 Cutting Power Source so that good electrical contact is
maintained between the conduit and the Cutting Power Source enclosure.
2. Maintenance of Cutting Equipment
The arc cutting 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 cutting equipment is in
operation. The cutting 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 stabilizing devices should be
adjusted and maintained according to the manufacturer's recommendation.
3. Torch and Ground Cables
The torch and ground cables should be kept as short as possible and should
be positioned close together, running at or close to the floor level.
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