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3.2 Obligations
Of
Owner/Operator
The owner operator undertakes to ensure that the only people allowed to work with the power
supply:
•
Are familiar with the basic regulations on workplace safety and accident prevention and who
have been instructed in how to operate the equipment.
•
Have read and understood the sections on safety and the warnings contained in this manual
•
Keep a copy of the instruction manual at the welding location at all times
Welding products and welding processes can cause serious injury or death, and possibly can
cause serious injury or death, and possible damage to other equipment if the operator does not
strictly observe all safety rules and take precautionary actions.
Safe practices have developed from past experience in the use of welding and cutting. These
practices must be learned through study and training before using this equipment. Anyone not
having extensive training in welding practices should not attempt to weld.
Safe practices are outlined in the American National Standard Z49.1 entitled: SAFETY IN
WELDING AND CUTTING. This publication and other guides to what you should learn before
operating this equipment are listed later in this section.
3.3 Shock
Prevention
Bare conductors, or terminals in the output circuit, or ungrounded, electrically live equipment
can fatally shock a person. To protect against shock, have a competent electrician verify that
the equipment is adequately grounded, do not make contact with terminals and parts that are
electrically HOT.
The body’s electrical resistance is decreased when wet, permitting dangerous currents to flow
through the body. Do not work in damp area without being extremely careful. Stand on dry
rubber mats or dry wood and use insulating gloves when dampness or sweat cannot be
avoided. Keep clothing dry.
3.3.1
Installation and Grounding of Electrically Powered Equipment
Electrical equipment must be installed and maintained in accordance with the
National Electrical Code, NFPA 70, and local codes. A power disconnect switch must
be located at the equipment. Check equipment nameplates for voltage and phase
requirements. DO NOT CONNECT the equipment-grounding conductor (lead) to the
third live wire of the 3-phase line as this makes the equipment frame electrically HOT,
which can cause fatal shock.
If a grounding lead (conductor) is part of the input power cable, be sure to connect it
to a properly grounded switch box or building ground. If not part of the supply cable,
use a separate grounding lead (conductor). Do not remove a ground prong from any
plug. Use correct mating receptacles. Check ground for electrical continuity before
using equipment.
3.3.2
Torch and Work Cables
Inspect cables often for damage to insulation. Replace or repair cracked or worn
cables immediately. Do not use a welding current in excess of rated cable capacity,
as the cable will overheat.