THERMAL ARC ARCMASTER 300 AC Manuel D'instructions page 8

ARCMASTER 300 ACDC
11. Do not touch electrode while in contact with the work
(ground) circuit.
12. Use only well-maintained equipment. Repair or replace
damaged parts at once.
13. In confined spaces or damp locations, do not use a
welder with AC output unless it is equipped with a
voltage reducer. Use equipment with DC output.
14. Wear a safety harness to prevent falling if working
above floor level.
15. Keep all panels and covers securely in place.
ARC RAYS can burn eyes and skin; NOISE can
damage hearing.
Arc rays from the welding process produce
intense heat and strong ultraviolet rays that
can burn eyes and skin. Noise from some
processes can damage hearing.
1. Wear a welding helmet fitted with a proper shade of
filter (see ANSI Z49.1 listed in Safety Standards) to
protect your face and eyes when welding or watching.
2. Wear approved safety glasses. Side shields
recommended.
3. Use protective screens or barriers to protect others
from flash and glare; warn others not to watch the
arc.
Welding or cutting
Torch soldering
Torch brazing
Oxygen Cutting
Light
Medium 1 to 6 in., 25-150 mm
Heavy
Gas welding
Light
Medium 1/8 to 1/2 in., 3-12 mm 5 or 6
Heavy
Shielded metal-arc Under 5/32 in., 4 mm
1-2
WARNING
Eye protection filter shade selector for welding or cutting
(goggles or helmet), from AWS A6.2-73.
Electrode Size Filter
2
3 or 4
Under 1 in., 25 mm 3 or 4 Gas tungsten arc welding
4 or 5
Over 6 in., 150 mm 5 or 6
Under 1/8 in., 3 mm 4 or 5
Over 1/2 in., 12 mm 6 or 8
10
5/32 to 1/4 in., 12
Over 1/4 in., 6.4 mm 14
4. Wear protective clothing made from durable, flame-
resistant material (wool and leather) and foot
protection.
5. Use approved ear plugs or ear muffs if noise level is
high.
FUMES AND GASES can be hazardous to your
health.
Welding produces fumes and gases. Breathing
these fumes and gases can be hazardous to
your health.
1. Keep your head out of the fumes. Do not breath the
fumes.
2. If inside, ventilate the area and/or use exhaust at the
arc to remove welding fumes and gases.
3. If ventilation is poor, use an approved air-supplied
respirator.
4. Read the Material Safety Data Sheets (MSDSs) and
the manufacturer's instruction for metals,
consumables, coatings, and cleaners.
5. Work in a confined space only if it is well ventilated,
or while wearing an air-supplied respirator. Shielding
gases used for welding can displace air causing injury
or death. Be sure the breathing air is safe.
Welding or cutting
Gas metal-arc
Non-ferrous base metal
Ferrous base metal
(TIG)
Atomic hydrogen welding
Carbon arc welding
Plasma arc welding
Carbon arc air gouging
Light
Heavy
Plasma arc cutting
Light Under 300 Amp
Medium 300 to 400 Amp
Heavy Over 400 Amp
WARNING
Electrode Size Filter
All 11
All 12
All 12
All 12
All 12
All 12
12
14
9
12
14
February 22, 2006