3 Survey measures for protection against electric shock
with protective conductor
(automatic disconnection the
event second fault)
with protective conductor
(automatic disconnection the
event single fault)
without protective conductor
(without automatic
disconnection)
protection by
− Class equipment or
by equivalent
insulation
− safety voltage
− electrical separation
with one supplied
apparatus
− non conducting
locations
− (earth free local
equipotential bonding)
continuous monitoring
of the insulation
conditions and
automatic disconnection
in the event second
fault
application in:
− systems
electrical separation
with more than one
supplied apparatus
automatic
disconnection by
means residual
current protective
devices
application in:
− systems
− systems
automatic
disconnection by
means of
overcurrent
protective devices
application in:
− systems
− systems
PROTECTION AGAINST
INDIRECT CONTACT
additional insulation
only connection with
other means of
protection
only for skilled or
instructed persons
for UAC V
UDC >120 V
if need
UAC V
UDC V
protection by
− high sensitive
residual current
protective
devices (e.FUNDAMENTAL RULES FOR PROTECTION AGAINST ELECTRIC SHOCK
50
Table 5.g.
I∆n mA
protection by
− obstacles
− placing out of
reach
protection by
− insulation
− barriers
− enclosures
additional protection in
case direct contact
protection against
unintentional contact
(partial protection)
protection against any
contact
(complete protection)
PROTECTION AGAINST
DIRECT CONTACT
