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may leave a permanent dark area in the field of vision. Before welding whilst

wearing contact lenses, seek advice from your optician.

PROTECTION OF NEARBY PERSONNEL

For production welding, a separate, well vented room or enclosed bay is best.

In open areas, surround the operation with low reflective, non- combustible

screens or panels. Allow for free air circulation, particularly at floor level.

Provide face shields for all persons who will be looking directly at the weld.

Others working in the area should wear flash goggles. Before starting to weld,

make sure that screen or bay doors are closed.

B) FIRE AND EXPLOSION PREVENTION

DO NOT overload arc welding equipment. It may overheat cables and cause

a fire. Loose cable connections may overheat or flash and cause a fire. Never

strike an arc on a cylinder or other pressure vessel. It creates a brittle area that

can cause a violent rupture or lead to such a rupture later under rough

handling.

C) SHOCK PREVENTION

Exposed live conductors or other bare metal in the welding circuit, or in

unearthed, electrically-live equipment can fatally shock a person whose body

becomes a conductor. DO NOT STAND, SIT, LIE, LEAN ON, OR TOUCH a wet

surface when welding without suitable protection.

PROTECTION FOR WEARERS OF ELECTRONIC LIFE SUPPORT DEVICES

(PACEMAKERS).

Magnetic fields from high currents can affect pacemaker operation. Persons

wearing pacemakers should consult with their doctor before going near arc

welding or spot welding operations.

D) PROTECTION AGAINST SHOCK

Keep your body and clothing dry. NEVER work in a damp area without

adequate insulation against electric shock. Stay on a dry duckboard or rubber

mat when dampness or sweat cannot be avoided. Sweat, sea water, or

moisture between the body and an electrically LIVE part - or earthed metal -

reduces the body surface electrical resistance, enabling dangerous and

possibly lethal currents to flow through the body.

1) EARTHING THE EQUIPMENT

When arc welding, equipment is earthed according to the National Electrical

Code and the workpiece is earthed, a voltage may exist between the

electrode and any conducting object.

Examples of conducting objects include, (but are not limited to), buildings,

electrical tools, work benches, welding power source cases, workpieces, etc.

NEVER touch the electrode and any metal object unless the welding power

source is off. When installing, connect the frames of each unit such as welding