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Welding/cutting equipment must only be used for
the purpose for which it is intended. It must never be
used for any other purpose, such as battery
charging, thawing out frozen water pipes, heating
premises by the addition of heating elements, etc.
ELECTRICAL SAFETY
CONNECTION TO THE SUPPLY CIRCUIT
Work on electrical installations must be done by
personnel qualified to do it. By qualified personnel,
we mean personnel who are qualified within the
meaning of national legislation and/or practice and
who, because of their technical training, are able to
appreciate the dangers of arc welding and
electricity.
Before connecting up any arc welding equipment
make sure that:
1. the main switch is in the "OFF" position;
2. the meter, the overload and short circuit
protection device, the supply sockets and plugs and
the electrical installation are compatible with the
maximum power and the supply voltage rating (refer
to the welding/cutting equipment manufacturer's
plate) and are in conformity with the national
standards and regulations in force;
3. the connection, single or 3-phase with a
protection wire, is protected by a residual differential
current sensitive circuit breaker capable of operating
with a seepage current not exceeding if possible 30
mA;
4. the protection wire is not disconnected by the
electric shock protection device;
5. the supply cable is of the "HEAVY DUTY" type;
6. the electricity supply circuit is fitted with an
emergency stop device, easily recognisable and
positioned to be easily and quickly accessible
7. Class A equipment is not intended for use in
residential locations where the electrical power is
provided by the public low-voltage supply system.
There may be potential difficulties in ensuring
electromagnetic compatibility in those locations,
due to conducted as well as radiated disturbances.
Only Class B equipment complies with
electromagnetic compatibility requirements in both
industrial and residential environ ments, including
residential locations where the electrical power is
provided by the public low voltage supply system.
Additional information is
available in the EN
60974-9 Arc welding
equipment – Installation
and use, International
Standard
WELDING CIRCUIT
Arc welding and cutting requires strict observance of
the safety precautions applicable in relation to
electricity.
Before any welding/cutting operation, check that:
1. no metal part accessible to operators or their
assistants can come into direct or indirect contact
with a supply circuit phase or neutral wire;
2. the electrode holders, torches and welding cables
are properly insulated;
3. the operator is insulated from the ground and
from the work piece (gloves, safety shoes, dry
clothes, leather apron, etc);
4. the current return cable is firmly connected as
close as possible to the welding area;
5. the welding circuit is made up exclusively of
wiring conforming with Harmonisation Document HD
22.6 S2: Conductors and cables insulated with
cross-linked materials with maximum assigned
voltages of 450/750 V - Part 6: Arc welding cables.
When welding operations are carried out in
environments with a high risk of electric shocks,
e.g.:
1. in places where the limited freedom of movement
obliges the operator to weld in an uncomfortable
position (kneeling, sitting or lying down), in physical
contact with conductors;
2. in areas totally or partially surrounded by
conductors, presenting a high risk of involuntary or
accidental contact by the operator;
3. in wet, damp or hot places where perspiration
considerably reduces the resistance of human skin
and the insulating properties of accessories.
Extra precautions are needed, and especially
1. welding/cutting equipment marked must be
used;
2. the operator's personal protection should be
upgraded by using insulating floors or mats;
3. the power source should be placed out of the
reach of the operator during welding/cutting
operations;
4. all the equipment connected to the circuit and
situated near to the operator should be protected by
a residual current sensitive circuit breaker able to
operate with a seepage current not exceeding 30
mA.
Never touch the electrode wire (or the nozzle)
and the work piece at the same time.
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