PAGE 2 OF 39
0318 IH-7095
PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY
SAFETY CONTINUED
This symbol, adjacent to another symbol, indicates the user must refer to
the manual or user guide for further information.
Risk of electrical shock.
Fuse symbol.
Equipment protected by double or reinforced insulation.
Low battery symbol.
Conforms to EU directives.
Do not discard this product in household trash.
AC measurement.
DC measurement.
Earth ground.
SAFETY SYMBOLS
OVERVOLTAGE CATEGORY I
Equipment of Overvoltage Category I is equipment for
connection to circuits in which measures are taken to limit
the transient over‐voltages to an appropriate low level.
NOTE: Examples include protected electronic
circuits.
OVERVOLTAGE CATEGORY II
Equipment of Overvoltage Category II is energy-
consuming equipment to be supplied from the fixed
installation.
NOTE: Examples include household, office and
laboratory appliances.
OVERVOLTAGE CATEGORY III
Equipment of Overvoltage Category III is equipment in
fixed installations.
NOTE: Examples include switches in the fixed
installation and some equipment for industrial
use with permanent connection to the fixed
installation.
OVERVOLTAGE CATEGORY IV
Equipment of Overvoltage Category IV is for use at the
origin of the installation.
NOTE: Examples include electricity meters and
primary over‐current protection equipment.
