Symbol Description Symbol Description
AC (Alternating
Current or Voltage)
DC (Direct Current
or Voltage)
Warning concerning a
point of danger (Refer
Manual)
Earth (ground)
terminal
Double or reinforced
insulation
Symbol Descri ption Symbol Description
AC (Alternating
Current or Voltage)
DC (Direct Current
or Voltage)
Warning concerning a
point of danger (Refer
Manual)
Earth (ground)
terminal
Double or reinforced
insulation
Measurements in
electrical circuits
which are electrically
connected to the low-
voltage mains:
with plugs, e.g. at
home, in the office or
laboratory etc.
Measurements in
building installations:
stationary power
consumers, distributor
terminals, devices
connected
permanently to the
distributor
Measurements at
power sources for
low-voltage
installations:
meters, mains
terminals, primary
overvoltage
protection devices
Fuse Hazardous Voltage
Measurements in
electrical circuits
which are electrically
connected to the lowvoltage mains:
with plugs, e.g. at
home, in the office or
laboratory etc.
Symbol Description Symbol Description
AC (Alternating
Current or Voltage)
DC (Direct Current
or Voltage)
Warning concerning a
point of danger (Refer
Manual)
Earth (ground)
terminal
Double or reinforced
insulation
Measurements in
electrical circuits
which are electrically
connected to the low-
voltage mains:
with plugs, e.g. at
home, in the office or
laboratory etc.
Measurements in
building installations:
stationary power
consumers, distributor
terminals, devices
connected
permanently to the
distributor
Measurements at
power sources for
low-voltage
installations:
meters, mains
terminals, primary
overvoltage
protection devices
Fuse Hazardous Voltage
Measurements in
building installations:
stationary power
consumers, distributor
terminals, devices
connected
permanently to the
distributor
Symbol Descri ption Symbol Description
AC (Alternating
Current or Voltage)
DC (Direct Current
or Voltage)
Warning concerning a
point of danger (Refer
Manual)
Earth (ground)
terminal
Double or reinforced
insulation
Measurements in
electrical circuits
which are electrically
connected to the low-
voltage mains:
with plugs, e.g. at
home, in the office or
laboratory etc.
Measurements in
building installations:
stationary power
consumers, distributor
terminals, devices
connected
permanently to the
distributor
Measurements at
power sources for
low-voltage
installations:
meters, mains
terminals, primary
overvoltage
protection devices
Fuse Hazardous Voltage
Measurements at
power sources for
low-voltage
installations:
meters, mains
terminals, primary
overvoltage
protection devices
Fuse
Hazardous Voltage