IEC 60238:2016/AMD1:2017

IEC 60238 ®
Edition 9.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Edison screw lampholders
Douilles à vis edison pour lampes

IEC 60238:2016-07/AMD1:2017-01(en-fr)

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IEC 60238 ®
Edition 9.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Edison screw lampholders
Douilles à vis edison pour lampes

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.10 ISBN 978-2-8322-3880-6

– 2 – IEC 60238:2016/AMD1:2017
© IEC 2017
FOREWORD
This amendment has been prepared by subcommittee 34B: Lamp caps and holders, of IEC
technical committee 34: Lamps and related equipment.
The text of this amendment is based on the following documents:
FDIS Report on voting
34B/1887/FDIS 34B/1892/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
The contents of the corrigendum of January 2018 have been included in this copy.
_____________
3 Terms and definitions
Add, at the end of Clause 3, the following new terms and definitions:
3.30
rated voltage
voltage declared by the manufacturer to indicate the highest working voltage for which the
lampholder is intended
[SOURCE: IEC 60838-1:2016, 3.1]
3.31
working voltage
highest r.m.s. voltage that may occur across any insulation, transients being disregarded,
both when the lamp is operating under normal conditions and when the lamp is removed
[SOURCE: IEC 60838-1:2016, 3.2]
3.32
rated current
current declared by the manufacturer to indicate the highest current for which the lampholder
is intended
[SOURCE: IEC 60838-1:2016, 3.3]

© IEC 2017
3.33
critical frequency
ƒ
crit
frequency at which the reduction of the breakdown voltage of a clearance begins (occurs)
Note 1 to entry: ƒ ≈ 0,2/d [MHz] where d (in mm) is the clearance according to Table 3 (basic or supplementary
crit
insulation and reinforced insulation respectively) disregarding the frequency.
[SOURCE: IEC 61347-1:2015, 3.40, modified – the note has been added]
3.34
ignition voltage
peak voltage applied to ignite a discharge lamp
[SOURCE: IEC 61347-1:2015, 3.46]
3.34.1
ignition pulse voltage
peak ignition voltage with a total duration of ≤ 750 µs (summation of all pulses durations)
within 10 ms, with the duration time (width) of each pulse being measured at the level of 50 %
of the maximum absolute peak value
Note 1 to entry: Ignition pulse waveforms, which are considered as ignition pulse voltage, should not contain any
dominant frequency above 30 kHz or should be usually highly damped (after 20 μs the peak voltage level should be
less than one half of the maximum peak voltage). For the assessment of the dominant frequency IEC 60664-
4:2005, Annex E should be consulted.
[SOURCE: IEC 61347-1:2015, 3.46.1]
3.35
rated ignition voltage
highest peak value of an ignition pulse voltage the holder is able to withstand
3.36
maximum working voltage
U
out
maximum occurring working voltage (r.m.s.) between the output terminals of a controlgear or
between the output terminals and earth, during normal or abnormal operating condition
Note 1 to entry: Transients and ignition voltages have to be neglected.
[SOURCE: IEC 61347-1:2015, 3.33, modified – "of a controlgear" has been added]
3.37
maximum working peak output voltage
Û
out
maximum repetitive occurring peak working voltage between the output terminals of a
controlgear or between its output terminals and earth, during normal or abnormal operating
condition and with transients neglected
[SOURCE: IEC 61347-1:2015, 3.45, modified – "of a controlgear" has been added]
3.38
equivalent transformed peak voltage
U
p
transformed output peak voltage, which is converted for the worst case peak voltage with its
related frequency into an ignition pulse voltage
Note 1 to entry: The value of the declared equivalent transformed output peak voltage is the essential parameter
for selecting the associated components.

– 4 – IEC 60238:2016/AMD1:2017
© IEC 2017
Note 2 to entry: See 3.34.1.
Note 3 to entry: To determine the declared equivalent transformed output peak voltage for basic insulation U
p
[basic] the worst case combination of the maximum occurring peak voltage and frequency has to be taken into
account, which means the maximum clearance according to IEC 61347-1:2015, Table 10 for basic insulation.
Note 4 to entry: To determine the declared equivalent transformed output peak voltage for the reinforced
insulation U [reinforced] the worst case combination of the maximum occurring peak voltage and frequency has to
p
be taken into account, which means the maximum clearance according to IEC 61347-1:2015, Table 11 for
reinforced insulation.
[SOURCE: IEC 61347-1:2015, 3.47]
8 Marking
8.1
Replace the second dashed list item with the following new text:
– rated voltage, in volts,
– rated ignition voltage, in kV, if higher than:
• 2,5 kV for lampholders rated 250 V;
• 4 kV for lampholders rated 500 V.
If applicable, the rated ignition voltage of the lampholder (in kV) shall be marked either on the
lampholder or made available in the manufacturer’s catalogue or the like.
NOTE 1 Some lampholders still show rated voltages higher than 500 V. This is an earlier way of expressing the
permissible ignition voltage via a rated voltage. For such lampholders, the creepage distances and clearances can
be found in IEC 60598-1.
18 Creepage distances and clearances
18.1
Replace Tables 13a and 13b with the following new Tables 13a and 13b:

© IEC 2017
Table 13a – Minimum distances for AC sinusoidal voltages up to 30 kHz −
Impulse withstand category II
Rated voltage
Distances
V
mm
d
50 150 250 500
Basic insulation
1 Distances between live parts of different
polarity, between live parts and a non-live
screw shell, and
2 Distances between live parts and external
metal parts, mounting surfaces, loose
metal cover, if any, the outer surface of
parts of insulating material which are
a
permanently fixed to the holder , including
screws or devices for fixing covers or
fixing the holder to its support:
– Creepage distances
b
insulation PTI ≥ 600 0,6 0,8 1,5 3
b
PTI < 600 1,2 1,6 2,5 5
c d
– Clearances 0,2 0,5 1,5 3
Reinforced insulation
Distances between live parts and external
metal parts, mounting surfaces, loose metal
cover, if any, the outer surface of parts of
insulating material which are permanently
a
fixed to the holder , including screws or
devices for fixing covers or fixing the holder to
its support:
– Creepage distances
b
insulation PTI ≥ 600 – 1,6 3 5,5
b
PTI < 600 – 3,2 5 10
c
– Clearances 0,4 1,6 3 5,5
Values for creepage distances may be found for intermediate values of rated voltages by linear interpolation
between tabulated values. No values are specified for rated voltages below 25 V AC and 60 V DC ripple free as
the voltage test of 15.4 is considered sufficient.
Creepage distances shall not be less than the required minimum clearance.
In Japan, the values given in the table are not applicable. Japan requires larger values than the values given in
the table.
a
The distances between live contacts and the lampholder face (reference plane) shall, however, be in
accordance with the relevant standard sheets of IEC 60061-2.
b
PTI (proof tracking index) in accordance with IEC 60112:2003 and IEC 60112:2003/AMD1:2009.
– In the case of creepage distances to parts not energized or not intended to be earthed, where no tracking
can occur, the values specified for material with PTI ≥ 600 apply for all materials (in spite of the real
PTI).
– For creepage distances subjected to working voltages of less than 60 s duration, the values specified for
material with PTI ≥ 600 apply for all materials.
– For creepage distances not liable to contamination by dust or moisture, the values specified for material
with PTI ≥ 600 apply for all materials (independent of the real PTI).
– For creepage distances, the equivalent DC voltage is equal to the r.m.s. value of the sinusoidal AC
voltage.
c
For clearances, the equivalent DC voltage is equal to the peak of the AC voltage.
d
Clearances between live parts and a non-live metal screw shell in an empty lampholder (unscrewed lamp)
can be reduced to 2 mm.
– 6 – IEC 60238:2016/AMD1:2017
© IEC 2017
Table 13b – Minimum distances for AC sinusoidal voltages up to 30 kHz −
Impulse withstand category III
Rated voltage
Distances
V
mm
d
50 150 250 500
Basic insulation
1 Distances between live parts of different
polarity and between live parts and a non-
live screw shell
– Creepage distances
b
insulation PTI ≥ 600 0,6 0,8 1,5 3
b
PTI < 600 1,2 1,6 2,5 5
c d
– Clearances 0,2 0,5 1,5 3
2 Distances between live parts and external
metal parts, mounting surfaces, loose
metal cover, if any, the outer surface of
parts of insulating material which are
a
permanently fixed to the holder , including
screws or devices for fixing covers or
fixing the holder to its support:
– Creepage distances
b
insulation PTI ≥ 600 0,6 1,5 3 5,5
b
PTI < 600 1,2 1,6 3 5,5
c
– Clearances 0,2 1,5 3 5,5
Reinforced insulation
Distances between live parts and external
metal parts, mounting surfaces, loose metal
cover, if any, the outer surface of parts of
insulating material which are permanently
a
fixed to the holder , including screws or
devices for fixing covers or fixing the holder to
its support:
– Creepage distances
b
insulation PTI ≥ 600 - 3 5,5 8
b
PTI < 600 - 3,2 5,5 10
c
– Clearances - 3 5,5 8
Values for creepage distances may be found for intermediate values of rated voltages by linear interpolation
between tabulated values. No values are specified for rated voltages below 25 V AC and 60 V DC ripple free as
the voltage test of 15.4 is considered sufficient.
Creepage distances shall not be less than the required minimum clearance.
In Japan, the values given in the table are not applicable. Japan requires larger values than the values given in
the table.
© IEC 2017
a
The distances between live contacts and the lampholder face (reference plane) shall, however, be in
accordance with the relevant standard sheets of IEC 60061-2.
b
PTI (proof tracking index) in accordance with IEC 60112:2003 and IEC 60112:2003/AMD1:2009.
– In the case of creepage distances to parts not energized or not intended to be earthed, where no
tracking can occur, the values specified for material with PTI ≥ 600 apply for all materials (in spite of the
real PTI).
– For creepage distances subjected to working voltages of less than 60 s duration, the values specified for
material with PTI ≥ 600 apply for all materials.
– For creepage distances not liable to contamination by dust or moisture, the values specified for material
with PTI ≥ 600 apply for all materials (independent of the real PTI).
– For creepage distances, the equivalent DC voltage is equal to the r.m.s. value of the sinusoidal AC
voltage.
c
For clearances, the equivalent DC voltage is equal to the peak of the AC voltage.
d
Clearances between live parts and a non-live metal screw shell in an empty lampholder (unscrewed lamp)
can be reduced to 2 mm.
Insert, between NOTE 3 and the paragraph starting with 'Metal locking devices', the following
new text, including NOTE 4 and NOTE 5:
The clearances for the rated ignition voltage of the holder shall not be less than the values
given in Table 14.
NOTE 4 Lampholders can be subjected to a working voltage higher than the rated voltage under the following
conditions:
• the nominal voltage and the overvoltage category of the supply voltage does not exceed the rated values of
the lampholder;
• the working voltage (r.m.s.) and the maximum repetitive peak working voltage (Û ) marked on the
out
controlgear respectively do not specify a higher creepage distance than the rated voltage of the lampholder;
• the working voltage does not specify a higher clearance than the rated voltage and the rated ignition voltage of
the lampholder.
NOTE 5 In case of combination of voltage and frequency (> 30 kHz) requiring higher creepage distances than the
values required in Tables 13a and 13b, the controlgear is marked with the details of this combi
...