Electronic circuits so designed and applied
that a fault will not render the appliance
unsafe
Appliances incorporating contactors or
relays subjected to the test of 19.14, being
carried out before the tests of 19.11
(IEC/EN 60335-1/A2)
Test of appliance with heating elements with
restricted heat dissipation; test voltage (V):
power input of 0,85 times rated power input
...................... :
Test of 19.2 repeated; test voltage (V): power
input of 1,24 times rated power input
............................... :
Test conditions as in cl. 11, any control limiting
the temperature during tests of cl. 11 short-
circuited
Test of 19.4 repeated on Class 0I and I
appliances with tubular sheathed or embedded
heating elements. No short-circuiting, but one
end of the element connected to the elements
sheath
No appropriate heating
elements
The test repeated with reversed polarity and the
other end of the heating element connected to
the sheath
The test is not carried out on appliances
intended to be permanently connected to fixed
wiring and on appliances where an all-pole
disconnection occurs during the test of 19.4
Appliances with PTC heating elements tested at
rated voltage, establishing steady conditions
No appropriate heating
elements
The working voltage of the PTC heating element
is increased by 5 % and the appliance is
operated until steady conditions are re-
established. The voltage is then increased in
similar steps until 1,5 times working voltage or
until the PTC heating element ruptures
Electronic circuits, compliance checked by
evaluation of the fault conditions specified in
19.11.2 for all circuits or parts of circuits, unless
they comply with the conditions specified in
19.11.1
Appliances incorporating a protective electronic
circuit subjected to the tests of 19.11.3 and
19.11.4 (IEC/EN 60335-1/A1)
Appliances having a switch with an off position
obtained by electronic disconnection, or a switch
placing the appliance in a stand-by mode,
subjected to the tests of 19.11.4 (IEC/EN 60335-
1/A1)
Appliances incorporating an electronic circuit
that relies upon a programmable component to
function correctly, subjected to the test of
19.11.4.8 (IEC/EN 60335-1/A2)
