IEC 60838-1:2016/AMD2:2020

IEC 60838-1 ®
Edition 5.0 2020-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 2
AM ENDEMENT 2
Miscellaneous lampholders –
Part 1: General requirements and tests

Douilles diverses pour lampes –
Partie 1: Exigences générales et essais

IEC 60838-1:2016-05/AMD2:2020-02(en-fr)

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IEC 60838-1 ®
Edition 5.0 2020-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 2
AM ENDEMENT 2
Miscellaneous lampholders –
Part 1: General requirements and tests

Douilles diverses pour lampes –

Partie 1: Exigences générales et essais

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.10 ISBN 978-2-8322-7897-0

– 2 – IEC 60838-1:2016/AMD2:2020
© IEC 2020
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/2071/FDIS 34B/2076/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• withdrawn,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.
_____________
2 Normative references
Replace the reference to IEC 60598-1:2014 with the following:
IEC 60598-1:2014, Luminaires – Part 1: General requirements and tests
IEC 60598-1:2014/AMD1:2017
Replace "IEC 60664-1" with "IEC 60664-1:2007".
5 General conditions for tests
5.3
In the last paragraph, replace “rated pulse voltage” with “rated ignition voltage”.
7 Marking
7.2
In 7.2, modified by Amendment 1, list item f), fourth dash, replace "pulse voltage" with
"iginition voltage".
Delete NOTE 3, added by Amendment 1.

© IEC 2020
In the first sentence of the second paragraph after NOTE 3, starting with "For polarized
lampholders the figure marked…", replace "pulse voltage" with "ignition voltage" and "rated
pulse voltage" with "rated iginition voltage".
9 Terminals
9.3
In the second paragraph, after "5.3 of IEC 60598-1:2014", add "and
IEC 60598-1:2014/AMD1:2017".
12 Moisture resistance, insulation resistance and electric strength
12.2.1
Table 1
Replace the last row of Table 1 and add a footnote to the table, as follows:
In lampholders without provision for earthing, between
live parts connected together and
– external metal parts including fixing screws

– metal foil covering external parts of insulation
1 4
a
material
a
Metal foil is applied for testing only.

12.2.2
In the NOTE replace "pulse" with "ignition".
13 Mechanical strength
In the second paragraph replace the reference to "Clause 4 of IEC 60068-2-75:2014" with
"Clause 5 of IEC 60068-2-75:2014".
15 Creepage distances and clearances
Table 2a and Table 2b
In the penultimate row of Table 2a and Table 2b, both modified by Amendment 1, delete the
last paragraph starting with "In Japan…" and add, after the first paragraph starting with
"Values for creepage distances…" the following new paragraph:
For glass, ceramics or other inorganic insulating materials which do not track, creepage
distances need not be greater than their associated clearance for the purpose of insulation
coordination. The dimensions of this table are appropriate.
After Table 2b, delete the paragraph starting with "However, the distances between live
contacts…".
Insert, between NOTE 2, added by Amendment 1 and Table 3, modified by Amendment 1, the
following new paragraph:
– 4 – IEC 60838-1:2016/AMD2:2020
© IEC 2020
Guidance on working voltages U can be found in Annex F.
out
Table 3
Replace the title of Table 3, modified by Amendment 1, with the following new title:
Table 3 – Minimum distances for ignition pulse voltages
or equivalent transformed peak voltages U
p
After NOTE 3, added by Amendment 1, replace the four paragraphs with the following new
text:
For polarized lampholders, creepage distances and clearances to external metal parts or the
outer surface of parts of insulating material may be designed and shall be checked for each
pole separately. The distances between the contacts shall be designed according to the high
ignition voltage.
Creepage distances shall be not less than the required minimum clearances.
Compliance is checked by measurement.
For clearance distances without influence on safety, for example distances between the
contacts, advantage might be taken from improved field conditions, but also in this case the
values for the homogenous fields (see IEC 60664-1) remain the absolute minimum.
Compliance is checked by the test of IEC 60664-1:2007, 6.1.2.2.1.1 corresponding to the
rated ignition voltage of the holder. Voltage drops are not permissible.
NOTE 4 Rated ignition voltage is referred to as rated impulse voltage in IEC 60664-1 for this test.
16 Endurance
In the last paragraph, replace "oxidation" with "degradation" and add, at the end of the
paragraph, the following new note:
NOTE Degradation of cable insulation can include outgassing of corrosive chemicals causing a non-conductive
coating on contacts.
17 Resistance to heat and fire
17.1
Delete the last paragraph of 17.1 starting with "In case of doubt.".
Annex B
Modify the status of Annex B from “normative” to “informative”.
Annex D
Figure D.1
Delete the NOTE in Figure D.1.

© IEC 2020
Figure D.2
Replace Figure D.2 with the following new Figure D.2.

Figure D.2 – Mounting fixture
Add, after Annex E, the following new informative Annex F.

– 6 – IEC 60838-1:2016/AMD2:2020
© IEC 2020
Annex F
(informative)
Guidance on working voltages U
out
F.1 Working voltages – relation between lampholders and controlgear
In recent years, an increasing number of controlgear used have been connected to the 250 V
mains, however they generate an output voltage higher than the lampholder rated voltage.
According to IEC 61347-1 this higher output voltage is required to be marked as U on the
out
controlgear.
NOTE The typical application of lampholders according to this document is the 250 V mains voltage system, as
shown in the example below.
F.2 Example
F.2.1 Clearance
Lampholders having a rated voltage of 250 V for impulse withstand category II need a
clearance of 1,5 mm. The reason for this is the expected transient overvoltage of 2,5 kV.
F.2.2 Creepage distance
F.2.2.1 Voltage value
For creepage distances only r.m.s. values of the working voltages are taken into account,
provided the frequency of the voltage is less than 30 kHz.
F.2.2.2 Inorganic material that does not track
As for inorganic material, the creepage distance does not need to be longer than the
clearance of a ceramic lampholder with a rated voltage of 250 V and this lampholder can be
operated at a working voltage of maximum 1,5 kV r.m.s.
NOTE The value of 1,5 kV is based on (2 U + 1 000) V and is derived from the electric strength test.
F.2.2.3 Plastic material with a PTI ≥ 600
A voltage of 250 V needs a clearance of 1,5 mm.
A voltage of 250 V needs a creepage distance of 1,25 mm if the insulation material has a
PTI ≥ 600.
In lampholder standards, the required creepage distance can never be less than the
clearance, therefore, for a 250 V rated lampholder, the minimum creepage distance is also 1,5
mm.
For a 1,5 mm creepage distance, linear interpolation between the creepage distance for 250 V
and 500 V results in a voltage of 300 V.
The 1,5 mm clearance is associated with the maximum r.m.s. working voltage not exceeding
300 V. Interpolation is not allowed for clearances.
Therefore, in the case of a plastic material with a PTI ≥ 600, lampholders with a rated voltage
of 250 V can be operated with a working voltage of 300 V r.m.s.

© IEC 2020
If, however, the actual creepage distance of the lampholder is even longer, then the maximum
working voltage that can be applied can be calculated by linear interpolation accordingly. In
this case information about the available minimum creepage distance of the lampholder and
its actual PTI may be provided in the manufacturer's catalogue or technical documentation.
For the calculation, Table 11.1A of IEC 60598-1:2014 and IEC 60598-1:2014/AMD1:2017 and
Table 8 of IEC 61347-1:2015, respectively, should be used.
F.2.2.4 Plastic material with a PTI < 600
In the case of a plastic material with a PTI < 600 the working voltage can only be higher than
the rated voltage if the creepage distance is longer than the required minimum value.
The calculation of the permissible working voltage can be done by linear interpolation of the
values for this material in Table 11.1A of IEC 60598-1:2014 and IEC 60598-
1:2014/AMD1:2017 and Table 8 of IEC 61347-1:2015 respectively. In this case information
about the available minimum creepage distance of the lampholder and the actual PTI should
be given in t
...