Safety Symbols
The general definitions of safety symbols used on equipment or in manuals are listed
below.
Direct current.
Alternating current.
Earth (ground) terminal.
Protective conductor terminal. For protection against electrical shock in case of a fault.
Used with field wiring terminals to indicate the terminal which must be connected to
ground before operating equipment.
Frame or chassis terminal. A connection to the frame (chassis) of the equipment which
normally includes all exposed metal structures.
Grounded terminal which indicates the earth potential.
On supply.
Off supply.
Standby supply. The equipment will be marked with this symbol is not completely
disconnected from AC mains when power switch is in the standby position.
In position of a bi-stable push switch.
Out position of a bi-stable push switch.
Hazardous voltage and potential for electrical shock. Do not touch terminals that have
this symbol when the equipment is on.
Hot surface. Avoid contact. Surfaces are hot and may cause personal injury if touched.
Instruction manual symbol. The equipment will be marked with this symbol when it is
necessary for the user to refer to the instruction manual.
WARNING The warning sign denotes a hazard. It calls attention to a procedure, practice, condition
or the like, which, if not correctly performed or adhered to, could result in injury or
death to personal.
CAUTION The caution sign denotes a hazard. It calls attention to an operating procedure, practice,
condition or the like, which, if not correctly performed or adhered to, could result in
damage to or destruction of part or all of the equipment.
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