SUMMARY
yIn semiautomatic or automatic wire welding, the electrode, electrode reel, welding head,
nozzle or semiautomatic welding gun are also electrically “hot”.
yAlways be sure the work cable makes a good electrical connection with the metal being welded
The connection should be as close as possible to the area being welded.
yMaintain the electrode holder, work clamp, welding cable and welding machine in good, safe
operating condition. Replace damaged insulation.
yNever dip the electrode in water for cooling.
yNever simultaneously touch electrically “hot” parts of electrode holders connected to two
welders because voltage between the two can be the total of the open circuit voltage of both
welders.
yWhen working above floor level, use a safety belt to protect yourself from a fall should you get
a shock.
FUMES AND GASES CAN BE DANGEROUS.
yWelding may produce fumes and gases hazardous to health. Avoid breathing these fumes and
gases. When welding, keep your head out of the fume. Use enough ventilation and/or exhaust at
the arc to keep fumes and gases away from the breathing zone. When welding with electrodes
which require special ventilation such as stainless or hard facing or on lead or cadmium plated
steel and other metals or coatings which produce highly toxic fumes, keep exposure as low as
possible and below Threshold Limit Values using local exhaust or mechanical ventilation. In
confined spaces or in some circumstances, outdoors, a respirator may be required. Additional
precautions are also required when welding on galvanized steel.
yDo not weld in locations near chlorinated hydrocarbon vapors coming from degreasing,
cleaning or spraying operations. The heat and rays of the arc can react with solvent vapors to
form phosgene, a highly toxic gas, and other irritating products.
yShielding gases used for arc welding can displace air and cause injury or death. Always use
enough ventilation, especially in confined areas, to insure breathing air is safe.
yRead and understand the manufacturer’s instructions for this equipment and the consumables
to be used, including the material safety data sheet and follow your employer’s safety practices.
ARC RAYS CAN BURN.
yUse a shield with the proper filter and cover plates to protect your eyes from sparks and the
rays of the arc when welding or observing open arc welding.
yUse suitable clothing made from durable flame-resistant material to protect your skin and that
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