Common Warning Symbols Definitions
The following symbols are commonly used to indicate that a task requires precautionary measures be understood and
practiced during the execution of the task.
Icon Definition
Notes
CAUTION
The exclamation point is intended to alert the user to the
presence of important operating and/or maintenance
(servicing) information in the literature accompanying the
product.
PRESENCE OF ELECTRICITY
The lightning bolt is intended to alert the user to the
presence of electricity. The electricity can be directly
related to the specific operation or it can be in the area
of the operation.
This icon is typically
used with another,
more specific, icon
that identifies the
nature of the warning.
HAZARDOUS VOLTAGE
The lightning bolt and human figure is intended to alert
the user to the presence of voltages that can serious or
fatal shock to a person.
EXPLOSION
The explosion is intended to alert the user to the
possibility that something associated with or in the area
of the particular operation presents the risk of an
explosion.
This icon is typically
used with another,
more specific, icon
that identifies the
nature of the warning.
EXPLOSION
The explosion with a face is intended to alert the user
that a particular operation or task exposes the
individual(s) to a risk of explosion within close proximity
to the immediate work location.
This icon is more
specific than the
previous EXPLOSION
icon.
HOT SURFACE
The open flame and heat lines are a generic icon to alert
the user that there is or could be an exposed source of
flame in the immediate vicinity of the particular
operation.
This icon is not the
same as the
FLAMMABLE icon
described below.
HOT SURFACE w/BURN HAZARD
The radiating surface with a hand alerts the user to the
risk that there is or could be a potential for being burned
by contact with a surface.
Hot surfaces are not
always associated
with a flame. An
engine exhaust pipe is
one example of a hot
surface with no flame.
FLAMMABLE
The large open flame indicates that the associated
operation involves working with fluids and/or gases that
are flammable.
Burning gases and
liquids can cause
severe burns.
Keep ignition sources
away.
