Amendment 2 - Miscellaneous lampholders - Part 1: General requirements and tests

Amendement 2 - Douilles diverses pour lampes - Partie 1: Exigences générales et essais

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IEC 60838-1:2016/AMD2:2020 - Amendment 2 - Miscellaneous lampholders - Part 1: General requirements and tests
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IEC 60838-1
Edition 5.0 2020-02
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)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60838-1
Edition 5.0 2020-02
Miscellaneous lampholders –
Part 1: General requirements and tests
Douilles diverses pour lampes –
Partie 1: Exigences générales et essais
ICS 29.140.10 ISBN 978-2-8322-7897-0

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 60838-1:2016/AMD2:2020
© IEC 2020

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

"" 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• withdrawn,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

In the last paragraph, replace “rated pulse voltage” with “rated ignition voltage”.

7 Marking

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.
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IEC 60838-1:2016/AMD2:2020 – 3 –
© 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
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
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
Metal foil is applied for testing only.
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


Insert, between NOTE 2, added by Amendment 1 and Table 3, modified by Amendment 1, the

following new paragraph:
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– 4 – IEC 60838-1:2016/AMD2:2020
© IEC 2020
Guidance on working voltages U can be found in Annex F.
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

After NOTE 3, added by Amendment 1, replace the four paragraphs with the following new


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, 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
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.
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IEC 60838-1:2016/AMD2:2020 – 5 –
© 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.
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– 6 – IEC 60838-1:2016/AMD2:2020
© IEC 2020
Annex F
Guidance on working voltages U
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


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


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, lamp

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