Safety
Symbols
General
denitions
of
safety
sym
b ols
used
on
equipmen
t
or
in
man
uals.
Instruction
man
ual
sym
b ol:
the
pro duct
will
b e
marked
with
this
sym
b ol
when
it
is
necessary
for
the
user
to
refer
to
the
instruction
man
ual
in
order
to
protect
against
damage
to
the
instrumen
t.
Indicates
dangerous
v
oltage
(terminals
fed
from
the
in
terior
b
y
v
oltage
exceeding
1000
v
olts
m
ust
b e
so
marked).
Protectiv e
conductor
terminal.
F
or
protection
against
electrical
sho c
k
in
case
of
a
fault.
Used
with
wiring
terminals
to
indicate
the
terminal
whic
h
m
ust
b e
connected
to
ground
b efore
op erating
equipmen
t.
Lo
w-noise
or
noiseless,
clean
ground
(earth)
terminal.
Used
for
a
signal
common,
as
w
ell
as
pro
viding
protection
against
electrical
sho c
k
in
case
of
fault.
A
terminal
marked
with
this
sym
b ol
m
ust
b e
connected
to
ground
in
the
manner
describ ed
in
the
installation
(Op eration)
man
ual,
and
b efore
op erating
the
equipmen
t.
F
rame
or
c
hassis
terminal.
A
connection
to
the
frame
(c
hassis)
of
the
equipmen
t
whic
h
normally
includes
all
exp osed
metal
structures.
Alternating
curren
t
(p o
w
er
line).
Direct
curren
t
(p o
w
er
line).
Alternating
or
direct
curren
t
(p o
w
er
line).
W
arning
denotes
a
hazard.
It
calls
attention
to
a
pro cedure,
practice,
condition
or
the
like,
whic
h,
if
not
correctly
p erformed
or
adhered
to,
could
result
in
injury
or
death
to
p ersonnel.
Caution
sign
denotes
a
hazard.
It
calls
attention
to
a
pro cedure,
practice,
condition
or
the
like,
whic
h,
if
not
correctly
p erformed
or
adhered
to,
could
result
in
damage
to
or
destruction
of
part
or
all
of
the
pro duct.
Note
denotes
imp ortant
information.
It
calls
attention
to
a
pro cedure,
practice,
condition
or
the
like,
whic
h
is
essen
tial
to
highlight.
vi
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