Edison screw lampholders (IEC 60238:2016)

This International Standard applies to lampholders with Edison thread E14, E27 and E40,
designed for connection to the supply of lamps and semi-luminaires1 only.
It also applies to switched-lampholders for use in AC circuits only, where the working voltage
does not exceed 250 V r.m.s.
This standard also applies to lampholders with Edison thread E5 designed for connection to
the supply mains of series connected lamps, with a working voltage not exceeding 25 V, to be
used indoors, and to lampholders with Edison thread E10 designed for connection to the
supply mains of series connected lamps, with a working voltage not exceeding 60 V, to be
used indoors or outdoors. It also applies to lampholders E10 for building-in, for the
connection of single lamps to the supply. These lampholders are not intended for retail sale.
As far as it reasonably applies, this standard also covers lampholders other than lampholders
with Edison thread designed for connection of series-connected lamps to the supply.
NOTE This type of lampholder is for example used in Christmas tree lighting chains.
As far as it reasonably applies, this standard also covers adapters.
This standard also covers lampholders which are, wholly or partly, integral with a luminaire or
intended to be built into appliances. It covers the requirements for the lampholder only. For
all other requirements, such as protection against electric shock in the area of the terminals
or of the lamp cap, the requirements of the relevant appliance standard are observed and
tested after building into the appropriate equipment, when that equipment is tested according
to its own standard. Such lampholders as well as lampholders provided with a snap-on outer
shell, for use by luminaire manufacturers only, are not for retail sale.
This standard applies to lampholders to be used indoors or outdoors in residential as well as
in industrial lighting installations. It also applies to candle lampholders. In locations where
special conditions prevail, as for street lighting, on board ships, in vehicles and in hazardous
locations, for example where explosions are liable to occur, special constructions may be
required.
This standard does not apply to three-light lampholders E26d.
This standard is based on the following data relative to lamps for general lighting service:
– caps E14 are used for lamps with a current not exceeding 2 A;
– caps E27 are used for lamps with a current not exceeding 4 A;
– caps E40 are used for lamps with a current not exceeding 16 A, or 32 A if the nominal
voltage of the supply does not exceed 130 V (see 5.5 and 6.3).
Where lampholders are used in luminaires, their maximum operating temperatures are
specified in IEC 60598.

Lampenfassungen mit Edisongewinde

Douilles à vis Edison pour lampes

L'IEC 60238:2016 s'applique aux douilles à vis Edison E14, E27 et E40 destinées uniquement au raccordement des lampes et des semi-luminaires à l'alimentation. Elle s'applique aussi aux douilles à interrupteur destinées exclusivement aux circuits de courant alternatif dont la tension de travail ne dépasse pas 250 V (valeur efficace). Cette neuvième édition annule et remplace la huitième édition parue en 2004, l'Amendement 1: 2008 et l'Amendement 2:2011. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) Addition d'un essai de traction pour certaines douilles E5 et E10. b) Une Annexe D répertoriant les exigences/articles amendés nécessitant la réalisation de nouveaux essais sur les produits.

Okovi za žarnice in sijalke z Edisonovim navojem (IEC 60238:2016)

Ta mednarodni standard velja za okove za žarnice in sijalke z Edisonovim navojem E14, E27 in E40, ki so zasnovani samo za povezavo sijalk in polsijalk1 z napajanjem.
Uporablja se tudi za okove za žarnice in sijalke s stikali za uporabo samo v izmeničnih tokokrogih, kjer delovna napetost ne presega 250 V RMS.
Ta standard velja tudi za okove za žarnice in sijalke z Edisonovim navojem E5, ki so zasnovani za povezavo serije povezanih sijalk z napajalnim omrežjem z delovno napetostjo do 25 V in za uporabo v notranjih prostorih, ter za okove za žarnice in sijalke z Edisonovim navojem E10, ki so zasnovani za povezavo serije povezanih sijalk z napajalnim omrežjem z delovno napetostjo do 60 V ter za uporabo v notranjih in zunanjih prostorih. Uporablja se tudi za okove E10 za vgradnjo, za povezavo posamezne sijalke z napajanjem. Ti okovi za žarnice in sijalke niso namenjeni prodaji na drobno.
Kolikor je smiselno ta standard zajema tudi druge okove za žarnice in sijalke, ki nimajo Edisonovega navoja in so zasnovane za povezavo serije povezanih sijalk z napajanjem.
OPOMBA: Takšni okovi se na primer uporabljajo pri svetlobnih nizih za osvetlitev novoletnih jelk. Kolikor je smiselno ta standard zajema tudi adapterje.
Ta standard zajema tudi okove, ki so, deloma ali v celoti, del sijalk ali bodo vgrajeni v naprave. Zajema samo zahteve za okove za sijalke in žarnice. Za vse druge zahteve, kot je zaščita pred električnim udarom v območju terminalov in vznožkov, se upoštevajo zahteve zadevnega standarda za naprave, ki se preskusijo po vgradnji v ustrezno opremo, ta oprema pa je preskušena po lastnem standardu. Takšni okovi ter tudi okovi, ki imajo zaskočno zunanjo lupino, ki jih uporabljajo samo proizvajalci sijalk, niso namenjeni prodaji na drobno.
Ta standard velja za okove, ki se uporabljajo v notranjih ali zunanjih prostorih za svetlobne naprave v stanovanjskih in industrijskih objektih. Uporablja se tudi za okove v obliki sveč. Na območjih, kjer prevladujejo posebne razmere, npr. pri cestni razsvetljavi, na ladjah, v vozilih ter v nevarnih območjih, npr. kjer so možne eksplozije, so morda potrebne posebne konstrukcije.
Ta standard se ne uporablja za okove E26d za lučke za okrasitev novoletne jelke.
Ta standard temelji na naslednjih podatkih v zvezi s sijalkami za splošno razsvetljavo:
– vznožki E14 se uporabljajo za sijalke s tokom do 2 A;
– vznožki E27 se uporabljajo za sijalke s tokom do 4 A;
– vznožki E40 se uporabljajo za sijalke s tokom do 16 A oziroma 32 A, če nazivna napetost napajanja ne presega 130 V (glej 5.5 in 6.3).
Če so v svetilkah uporabljeni okovi, so njihove najvišje temperature delovanja določene v IEC 60598.

General Information

Status
Published
Publication Date
16-May-2018
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
23-Nov-2016
Due Date
28-Jan-2017
Completion Date
17-May-2018

RELATIONS

Effective Date
17-Sep-2013

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SLOVENSKI STANDARD
SIST EN IEC 60238:2018
01-julij-2018
1DGRPHãþD
SIST EN 60238:2005
SIST EN 60238:2005/A1:2008
SIST EN 60238:2005/A2:2011
Okovi za žarnice in sijalke z Edisonovim navojem (IEC 60238:2016)
Edison screw lampholders (IEC 60238:2016)
Ta slovenski standard je istoveten z: EN IEC 60238:2018
ICS:
29.140.10 Grla in držala žarnic Lamp caps and holders
SIST EN IEC 60238:2018 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 60238:2018
---------------------- Page: 2 ----------------------
SIST EN IEC 60238:2018
EUROPEAN STANDARD EN IEC 60238
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2018
ICS 29.140.10 Supersedes EN 60238:2004
English Version
Edison screw lampholders
(IEC 60238:2016)
Douilles à vis Edison pour lampes Lampenfassungen mit Edisongewinde
(IEC 60238:2016) (IEC 60238:2016)

This European Standard was approved by CENELEC on 2016-08-18. CENELEC members are bound to comply with the CEN/CENELEC

Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC

Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the

same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,

Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60238:2018 E
---------------------- Page: 3 ----------------------
SIST EN IEC 60238:2018
EN IEC 60238:2018 (E)
European foreword

The text of document 34B/1852/FDIS, future edition 9 of IEC 60238, prepared by SC 34B "Lamp caps

and holders" of IEC/TC 34 "Lamps and related equipment" was submitted to the IEC-CENELEC

parallel vote and approved by CENELEC as EN IEC 60238:2018.
The following dates are fixed:
2018-09-23
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
2021-03-23
• latest date by which the national standards conflicting with
the document have to be withdrawn
This document supersedes EN 60238:2004.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such

patent rights.

This document has been prepared under a mandate given to CENELEC by the European Commission

and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this

document.
Endorsement notice

The text of the International Standard IEC 60238:2016 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60061 NOTE Harmonized in EN 60061 series.
IEC 60061-4 NOTE Harmonized as EN 60061-4.
IEC 60068-2-20 NOTE Harmonized as EN 60068-2-20.
IEC 60335-1:2001 NOTE Harmonized as EN 60335-1:2002 (modified).
IEC 60335-2-24:2002 NOTE Harmonized as EN 60335-2-24:2003 (not modified).
IEC 60598 NOTE Harmonized in EN 60598 series.
IEC 60664-1 NOTE Harmonized as EN 60664-1.
IEC 60695-2-10 NOTE Harmonized as EN 60695-2-10.
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SIST EN IEC 60238:2018
EN IEC 60238:2018 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod),

the relevant EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is

available here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60061-1 (mod) 1969 Lamp caps and holders together with EN 60061-1 1993
gauges for the control of interchangeability
and safety -- Part 1: Lamp caps
IEC 60061-2 (mod) 1969 Lamp caps and holders together with EN 60061-2 1993
gauges for the control of interchangeability
and safety -- Part 2: Lampholders
IEC 60061-3 (mod) 1969 Lamp caps and holders together with EN 60061-3 1993
gauges for the control of interchangeability
and safety -- Part 3: Gauges
IEC 60068-2-32 1975 Basic environmental testing procedures - - -
Part 2: Tests - Test Ed: Free fall

IEC 60068-2-75 2014 Environmental testing - Part 2-75: Tests - EN 60068-2-75 2014

Test Eh: Hammer tests
IEC 60112 2003 Method for the determination of the proof EN 60112 2003
and the comparative tracking indices of
solid insulating materials
+ A1 2009 + A1 2009
IEC 60227 series Polyvinyl chloride insulated cables of rated - -
voltages up to and including 450/750 V --
Part 1: General requirements
IEC 60245 series Rubber insulated cables - Rated voltages - -
up to and including 450/750 V -- Part 1:
General requirements
IEC 60352-1 1997 Solderless connections -- Part 1: Wrapped EN 60352-1 1997
connections - General requirements, test
methods and practical guidance
IEC 60399 2004 Barrel thread for lampholders with shade EN 60399 2004
+ A1 2008 holder ring + A1 2008
IEC 60417 2002 Graphical symbols for use on equipment - -
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code)
- - + corrigendum May 1993
+ A1 1999 + A1 2000
+ A2 2013 + A2 2013

IEC 60598-1 (mod) 2014 Luminaires -- Part 1: General requirements EN 60598-1 2015

and tests
IEC 60630 (mod)1994 Maximum lamp outlines for incandescent EN 60630 1998
+ A7 2014 lamps + A7 2015
---------------------- Page: 5 ----------------------
SIST EN IEC 60238:2018
EN IEC 60238:2018 (E)
IEC 60695-2-11 2014 Fire hazard testing - Part 2-11: EN 60695-2-11 2014
Glowing/hot-wire based test methods -
Glow-wire flammability test method for
end-products (GWEPT)
IEC 60695-11-5 2016 Fire hazard testing -- Part 11-5: Test EN 60695-11-5 2017
flames - Needle-flame test method -
Apparatus, confirmatory test arrangement
and guidance
IEC 61058-1 (mod) 2000 Switches for appliances -- Part 1: General EN 61058-1 1)
2002
requirements
ISO 4046-4 2002 Paper, board, pulps and related terms - - -
Vocabulary -- Part 4: Paper and board
grades and converted products

1) EN 61058-1:2002 consists of IEC 61058-1:2000 (modified) and IEC 61058-1:2000/A1:2001 (not modified).

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SIST EN IEC 60238:2018
EN IEC 60238:2018 (E)
Annex ZZ
(informative)
Relationship between this European standard and the safety objectives of
Directive 2014/35/EU [2014 OJ L96] aimed to be covered

This European standard has been prepared under a Commission’s standardisation request relating to

harmonised standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means

of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the

Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the

making available on the market of electrical equipment designed for use within certain voltage limits

[2014 OJ L96].

Once this standard is cited in the Official Journal of the European Union under that Directive,

compliance with the normative clauses of this standard given in Table ZZ.1 confers, within the limits of

the scope of this standard, a presumption of conformity with the corresponding safety objectives of

that Directive, and associated EFTA regulations.

Table ZZ.1 – Correspondence between this European standard and Annex I of Directive

2014/35/EU [2014 OJ L96]
Safety objectives of Directive Clause(s) / sub-clause(s)
Remarks / Notes
2014/35/EU of this EN
1. General conditions
a) the essential characteristics, Clause 8
the recognition and observance
of which will ensure that
electrical equipment will be used
safely and in applications for
which it was made, shall be
marked on the electrical
equipment, or, if this is not
possible, on an accompanying
document;
b) the electrical equipment, All clauses
together with its component
parts, shall be made in such a
way as to ensure that it can be
safely and properly assembled
and connected;
c) the electrical equipment shall See item 2 and 3 of this table
be so designed and
manufactured as to ensure that
protection against the hazards
set out in points 2 and 3 is
assured, providing that the
equipment is used in
applications for which it was
made and is adequately
maintained.
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SIST EN IEC 60238:2018
EN IEC 60238:2018 (E)
2. Protection against hazards
arising from the electrical
equipment
Measures of a technical nature
shall be laid down in accordance
with point 1, in order to ensure
that:
a) persons and domestic Clauses 4, 9, 10, 11, 12, 13, 14,
15 and 17
animals are adequately
protected against the danger of
physical injury or other harm
which might be caused by direct
or indirect contact;
b) temperatures, arcs or Clauses 13, 15, 18, 19, 20 and
radiation which would cause a
danger, are not produced;
c) persons, domestic animals Clauses 4, 13, 16, 19 and 22
and property are adequately
protected against non-electrical
dangers caused by the electrical
equipment which are revealed
by experience;
d) the insulation is suitable for Clauses 10, 12, 13, 16, 18, 20
foreseeable conditions. and 21
3. Protection against hazards
which may be caused by
external influences on the
electrical equipment
Technical measures shall be
laid down in accordance with
point 1, in order to ensure that
the electrical equipment:
a) meets the expected Clauses 8, 9, 13, 16 and 22
mechanical requirements in
such a way that persons,
domestic animals and property
are not endangered;
b) is resistant to non-mechanical Clauses 13, 15,18, 20 and 21
influences in expected
environmental conditions, in
such a way that persons,
domestic animals and property
are not endangered;
c) does not endanger persons, Clauses 13, 15, 20 and 21
domestic animals and property
in foreseeable conditions of
overload.
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SIST EN IEC 60238:2018
EN IEC 60238:2018 (E)

WARNING 1: Presumption of conformity stays valid only as long as a reference to this European

standard is maintained in the list published in the Official Journal of the European Union. Users of this

standard should consult frequently the latest list published in the Official Journal of the European

Union.

WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of

this standard.
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SIST EN IEC 60238:2018
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SIST EN IEC 60238:2018
IEC 60238
Edition 9.0 2016-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Edison screw lampholders
Douilles à vis edison pour lampes
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.10 ISBN 978-2-8322-3465-5

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: 11 ----------------------
SIST EN IEC 60238:2018
– 2 – IEC 60238:2016 © IEC 2016
CONTENTS

FOREWORD ........................................................................................................................4

1 Scope ...........................................................................................................................6

2 Normative references ....................................................................................................7

3 Terms and definitions ....................................................................................................8

4 General requirement .................................................................................................... 11

5 General conditions for tests ......................................................................................... 11

6 Standard ratings .......................................................................................................... 12

7 Classification ............................................................................................................... 13

8 Marking ....................................................................................................................... 14

9 Dimensions ................................................................................................................. 17

10 Protection against electric shock.................................................................................. 19

11 Terminals .................................................................................................................... 22

12 Provision for earthing .................................................................................................. 25

13 Construction ................................................................................................................ 26

14 Switched lampholders .................................................................................................. 31

15 Moisture resistance, insulation resistance and electric strength .................................... 32

16 Mechanical strength .................................................................................................... 35

17 Screws, current-carrying parts and connections ........................................................... 39

18 Creepage distances and clearances ............................................................................ 41

19 Normal operation ......................................................................................................... 44

20 General resistance to heat ........................................................................................... 45

21 Resistance to heat, fire and tracking ............................................................................ 47

22 Resistance to excessive residual stresses (season cracking) and to rusting ................. 50

Annex A (normative) Season cracking/corrosion test .......................................................... 71

Annex B (informative) Guidance for requirements in IEC 61058-1 applicable to

switches in lampholders (see 14.2) ..................................................................................... 73

Annex C (informative) Guidance for special requirements in appliance standards –

Household and similar electrical appliances ........................................................................ 75

Annex D (informative) Schedule of amended subclauses containing more

serious/critical requirements which require products to be retested ..................................... 77

Bibliography ....................................................................................................................... 78

Figure 1a –Nipple thread for lampholders: metric thread. Basic profile and design

profile for the nut and for the screw ..................................................................................... 51

Figure 1b –Nipple thread for lampholders: ISO standard pipe thread. Basic profile and

design profile for the nut and for the screw .......................................................................... 52

Figure 2a – Gauges for metric thread for nipples ................................................................. 53

Figure 2b – Gauges for ISO standard pipe thread for nipples ............................................... 54

Figure 3 – Gauge for holes for backplate lampholder screws ............................................... 55

Figure 4 – Normal operation test apparatus ......................................................................... 56

Figure 5 – Test caps for the test of Clause 18 ..................................................................... 57

Figure 6 – Torque apparatus ............................................................................................... 58

Figure 7 – Tumbling barrel .................................................................................................. 59

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SIST EN IEC 60238:2018
IEC 60238:2016 © IEC 2016 – 3 –

Figure 8 – Impact-test apparatus ........................................................................................ 60

Figure 9 – Pressure apparatus ............................................................................................ 61

Figure 10 – Ball-pressure test apparatus ............................................................................. 61

Figure 11 – Test cap for the tests of 15.4 and 20.3 .............................................................. 62

Figure 12 – Bending apparatus ........................................................................................... 63

Figure 13 – Test cap A and test cap B for lampholders E14 ................................................. 65

Figure 14 – Test cap for lampholders E27 ........................................................................... 66

Figure 15 – Test cap for lampholders E40 ........................................................................... 67

Figure 16 – Standard test finger (according to IEC 60529) .................................................. 68

Figure 17 – Clarification of some definitions ........................................................................ 69

Figure 18 – Preparation of specimens for the needle-flame test of 21.4 ............................... 70

Table 1 – Thickness of screw shells and contacts ............................................................... 18

Table 2 – Minimum effective screw lengths ......................................................................... 18

Table 3 – Dimensions of threaded entries and set screws ................................................... 19

Table 4 – Minimum dimensions of pillar-type terminals ........................................................ 23

Table 5 – Minimum dimensions of screw-type terminals ...................................................... 24

Table 6 – Pull and torque values ......................................................................................... 29

Table 7 – Insertion torque ................................................................................................... 31

Table 8 – Minimum and maximum removal torques ............................................................. 31

Table 9 – Test cap dimensions ........................................................................................... 35

Table 10 – Heights of fall .................................................................................................... 37

Table 11 – Maximum deformation values ............................................................................ 38

Table 12 – Torque values ................................................................................................... 40

Table 13a – Minimum distances for AC (50/60 Hz) sinusoidal voltages: Impulse

withstand category II ........................................................................................................... 42

Table 13b – Minimum distances for AC (50/60 Hz) sinusoidal voltages: Impulse

withstand category III .......................................................................................................... 43

Table 14 – Minimum distances for non-sinusoidal pulse voltages......................................... 43

Table 15 – Heating cabinet temperatures ............................................................................ 46

Table A.1 – pH adjustment .................................................................................................. 71

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SIST EN IEC 60238:2018
– 4 – IEC 60238:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EDISON SCREW LAMPHOLDERS
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an

international consensus of opinion on the relevant subjects since each technical committee has representation

from all interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 60238 has been prepared by subcommittee 34B: Lamp caps and

holders, of IEC technical committee 34: Lamps and related equipment.

This ninth edition cancels and replaces the eighth edition published in 2004, Amendment 1:

2008 and Amendment 2:2011. This edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
a) Addition of a pull test for certain E5 and E10 lampholders.

b) Annex D listing amended requirements/clauses which require products to be retested.

---------------------- Page: 14 ----------------------
SIST EN IEC 60238:2018
IEC 60238:2016 © IEC 2016 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
34B/1852/FDIS 34B/1860/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

In this standard, the following print types are used:
– compliance statements: in italic type.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site 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.
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SIST EN IEC 60238:2018
– 6 – IEC 60238:2016 © IEC 2016
EDISON SCREW LAMPHOLDERS
1 Scope

This International Standard applies to lampholders with Edison thread E14, E27 and E40,

designed for connection to the supply of lamps and semi-luminaires only.

It also applies to switched-lampholders for use in AC circuits only, where the working voltage

does not exceed 250 V r.m.s.

This standard also applies to lampholders with Edison thread E5 designed for connection to

the supply mains of series connected lamps, with a working voltage not exceeding 25 V, to be

used indoors, and to lampholders with Edison thread E10 designed for connection to the

supply mains of series connected lamps, with a working voltage not exceeding 60 V, to be

used indoors or outdoors. It also applies to lampholders E10 for building-in, for the

connection of single lamps to the supply. These lampholders are not intended for retail sale.

As far as it reasonably applies, this standard also covers lampholders other than lampholders

with Edison thread designed for connection of series-connected lamps to the supply.

NOTE This type of lampholder is for example used in Christmas tree lighting chains.

As far as it reasonably applies, this standard also covers adapters.

This standard also covers lampholders which are, wholly or partly, integral with a luminaire or

intended to be built into appliances. It covers the requirements for the lampholder only. For

all other requirements, such as protection against electric shock in the area of the terminals

or of the lamp cap, the requirements of the relevant appliance standard are observed and

tested after building into the appropriate equipment, when that equipment is tested according

to its own standard. Such lampholders as well as lampholders provided with a snap-on outer

shell, for use by luminaire manufacturers only, are not for retail sale.

This standard applies to lampholders to be used indoors or outdoors in residential as well as

in industrial lighting installations. It also applies to candle lampholders. In locations where

special conditions prevail, as for street lighting, on board ships, in vehicles and in hazardous

locations, for example where explosions are liable to occur, special constructions may be

required.
This standard does not apply to three-light lampholders E26d.

This standard is based on the following data relative to lamps for general lighting service:

– caps E14 are used for lamps with a current not exceeding 2 A;
– caps E27 are used for lamps with a current not exceeding 4 A;

– caps E40 are used for lamps with a current not exceeding 16 A, or 32 A if the nominal

voltage of the supply does not exceed 130 V (see 5.5 and 6.3).

Where lampholders are used in luminaires, their maximum operating temperatures are

specified in IEC 60598.
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Requirements for lampholders suitable for semi-luminaires are under consideration.

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