13.4.4
Work Environment Safety
DANGER! Remove any combustible material from the work area.
1.
When possible, move the work to a location well away from combustible materials. If relocation
is not possible, protect the combustibles with a cover made of fire resistant material.
2.
Remove or make safe all combustible materials for a radius of 10 metres around the work area.
Use a fire resistant material to cover or block all doorways, windows, cracks, and other openings.
3.
Enclose the work area with portable fire resistant screens. Protect combustible walls, ceilings,
floors, etc., from sparks and heat with fire resistant covers.
4.
If working on a metal wall, ceiling, etc., prevent ignition of combustibles on the other side by
moving the combustibles to a safe location. If relocation of combustibles is not possible,
designate someone to serve as a fire watch, equipped with a fire extinguisher, during the cutting
process and well after the cutting is completed.
5.
Do not weld or cut on materials having a combustible coating or combustible internal structure,
as in walls or ceilings, without an approved method for eliminating the hazard.
6.
After cutting or welding, make a thorough examination for evidence of fire. Be aware that visible
smoke or flame may not be present for some time after the fire has started. Do not weld or cut in
atmospheres containing dangerously reactive or flammable gases, vapours, liquids, and dust.
Provide adequate ventilation in work areas to prevent accumulation of flammable gases, vapours,
and dust.
7.
Do not apply heat to a container that has held an unknown substance or a combustible material
whose contents, when heated, can produce flammable or explosive vapours. Clean and purge
containers before applying heat. Vent closed containers, including castings, before preheating,
welding, or cutting.
13.4.5
Electricity Can Kill
DANGER! Touching live electrical parts can cause fatal shocks or severe burns.
The electrode and work circuit is electrically live whenever the output is on.
The input power circuit and machine internal circuits are also live when power is on. Incorrectly installed
or improperly grounded equipment is a hazard.
1.
Do not touch live electrical parts.
2.
Wear dry, hole-free insulating gloves and body protection.
3.
Insulate yourself from the work and the ground using dry insulating mats or covers.
4.
Disconnect input power before installing or servicing this equipment. Lock input power,
disconnect switch open, or remove line fuses so power cannot be turned on accidentally.
5.
Properly install and ground this equipment according to national, state, and local codes.
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