GENERAL INFORMATION 1-2 Manual 0-2962
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the work piece or other parts of the welding circuit.
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or damp.
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code, refer to item 9 in Subsection 1.03, Publications.
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service or repairs.
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Manual.
FIRE AND EXPLOSION
Fire and explosion can be caused by hot slag, sparks, or
the plasma arc.
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rial in the workplace. Any material that cannot be
removed must be protected.
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workplace.
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combustibles.
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fire hazards may exist.
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aluminum workpieces when they are cut underwater
or while using a water table. DO NOT cut aluminum
alloys underwater or on a water table unless the hy-
drogen gas can be eliminated or dissipated. Trapped
hydrogen gas that is ignited will cause an explosion.
NOISE
Noise can cause permanent hearing loss. Plasma arc
processes can cause noise levels to exceed safe limits.
You must protect your ears from loud noise to prevent
permanent loss of hearing.
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tective ear plugs and/or ear muffs. Protect others in
the workplace.
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decibels (sound) do not exceed safe levels.
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in Subsection 1.03, Publications, in this manual.
PLASMA ARC RAYS
Plasma Arc Rays can injure your eyes and burn your skin.
The plasma arc process produces very bright ultra violet
and infra red light. These arc rays will damage your eyes
and burn your skin if you are not properly protected.
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or shield. Also always wear safety glasses with side
shields, goggles or other protective eye wear.
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your skin from the arc rays and sparks.
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Replace lenses when cracked, chipped or dirty.
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Use protective booths, screens or shields.
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per ANSI/ASC Z49.1:
Minimum Protective Suggested
Arc Current Shade No. Shade No.
Less Than 300* 8 9
300 - 400* 9 12
400 - 800* 10 14
* These values apply where the actual arc is
clearly seen. Experience has shown that lighter
filters may be used when the arc is hidden by
the workpiece.