Safety Precautions For Arc Welding; Symbol Usage - Miller Electric Metro 300DX Owner's Manual

SECTION 1
-
SAFETY PRECAUTIONS FOR ARC WELDING
1-1. Symbol Usage
a
Means Warning! Watch Out! There
are
possible hazards with this
procedure! The possible hazards
are
shown in the adjoining symbols.
sately_roml
4/95
~1!~~d~
This group of symbols
means
Warning! Watch Out!
possible
ELECTRIC SHOCK, MOVING
PARTS, and HOT PARTS hazards. Consult symbols and related instructions below for
necessary
actions
to
avoid the hazards.
1-2. Arc Welding Hazards
a
WARNING
The
symbols
shown below
are
used
throughout
this manual
to
call attention
to and identify possible hazards.
When you
see
the symbol, watch
out,
and follow the related Instructions
to
avoid the hazard. The
safety
Information given below Is
only
a summary
of the
more
complete safety
Information found
in the Safety
Standards listed in Section 1-5. Read and follow all Safety Standards.
Only qualified persons should install, operate, maintain,
and
repair this unit.
ELECTRIC SHOCK
can
kill.
Touching live electrical
parts
can cause
fatal
shocks
or severe
bums. 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.
In
semiautomatic
or
automatic wire
welding, the wire,
wire reel, drive roll housing, and all metal
parts
touching
the
welding
wire
are
electrically
live.
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 work and ground using dry insulating
mats
or covers
big enough
to prevent
any
physical contactwith
the work
or
ground.
4. Disconnect input
power or
stop
engine before installing
or
servicing this equipment. Lockout/tagout input
power
according
to
OSHA 29 CFR 191 0.147 (see Safety Standards).
5. Properly install and ground this equipment according
to
its
Owners Manual and national, state, and local codes.
6. Always verify the
supply ground
check and be
sure
that
input
nnwer
~nrd nrniinrl wire
is ornnerhi
ennne~tad
tn nrntind
NOISE
ARC RAYS
can
burn eyes and skin;
NOISE
can
damage hearing; FLYING
SLAG OR SPARKS
can
injure
eyes.
Arc rays from the welding
process
produce intense
visible and invisible (ultraviolet and infrared)
rays
that
can
bum eyes and skin. Noise from
some
processes can
damage hearing. Chipping,
grinding,
and welds
cooling
throw off
pieces
of
metal
or
slag.
1. 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 breathe 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
manufacturers instruction for
metals, consumables, coatings,
cleaners,
and
degreasers.
terminal in disconnect box
or
that cord plug Is connected
to
a
properly grounded receptacle outlet.
7. When making input connections, attach proper grounding
conductor first double-check connections.
8. Frequently inspect input
power
cord for damage
or
bare
wiring
replace cord immediately if damaged bare
wiring
can
kill.
9. Turn off all equipment when not in
use.
10. Do
not
use worn,
damaged, undersized,
or
poorly spliced
cables.
11. Do
not drape
cables
over
your
body.
12. If earth
grounding of the
workpiece is
required, ground
it
directly
with
a
separate cable do not
use
work
clamp
or
work cable.
13. Do
not
touch electrode if
you are
in contact with the
work,
ground,
or
another electrode from
a
different machine.
14. Use only well-maintained equipment. Repair
or
replace
damaged parts at
once.
Maintain unit
according to
manual.
15. Wear
a
safety
harness if
working
above floor level.
16. Keep all panels and
covers
securely in place.
Clamp
work
cable with good metal-to-metal
contact to
workpiece
or
worktable
as
near
the weld
as
practical.
ARC RAYS
2. Wear
a
welding
helmet fitted with
a
proper shade of filter to
protect
your face and eyes when welding
or
watching (see ANSI
Z49.1 and Z87.1 listed in Safety Standards).
3.
Wear approved safety glasses with side shields.
4.
Use
protective
screens or
barriers
to protect
others from flash
and
glare;
warn
others
not to
watch the
arc.
5.
Wear
protective clothing
made from durable, flame-resistant
material (wool and leather) and foot protection.
5. Work in
a
confined space only
if it is well
ventilated,
or
while
wearing
an
air-supplied respirator. Always have
a
trained
watchperson nearby. Welding
fumes and gases
can
displace air
and lower the oxygen level causing injury
or
death. Be
sure
the
breathing air is safe.
6. Do not weld in locations
near
degreasing, cleaning,
or
spraying
operations. The heat and
rays
of the
arc can
react with vapors to
form highly toxic and irritating
gases.
7. Do not weld
on
coated metals, such
as
galvanized, lead,
or
cadmium plated steel,
unless the
coating is removed from the
weld area, the
area
Is well ventilated, and If necessary, while
wearing
an
air-supplied respirator.
The
coatings
and any metals
containing these elements
can
give off toxic fumes If welded.
A Marks
a
special safety
message.
~ Means NOTE;
not
safety
related.
1
During operation, keep everybody, especially children,
away.
OM-156 368 Page 1