SIST EN 60238:2005
(Main)Edison screw lampholders
Edison screw lampholders
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 a.c. 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.
Lampenfassungen mit Edisongewinde
Douilles à vis Edison pour lampes
La présente Norme internationale 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 service ne dépasse pas 250 V (valeur efficace). La présente norme est également applicable aux douilles à vis Edison E5 destinées à être raccordées au réseau d'alimentation de lampes montées en série et dont la tension de fonctionnement ne dépasse pas 25 V, pour utilisation à l'intérieur, ainsi qu'aux douilles à vis Edison E10 destinées au raccordement au réseau d'alimentation de lampes montées en série et dont la tension de fonctionnement ne dépasse pas 60 V, pour utilisation à l'intérieur ou à l'extérieur. Elle s'applique également aux douilles E10 à incorporer, pour le raccordement de lampes individuelles à l'alimentation. Ces douilles ne sont pas destinées à la vente au détail.
Okovi za žarnice in sijalke z Edisonovim navojem (IEC 60238:2004) (vsebuje popravek AC:2005)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60238:2005
01-junij-2005
1DGRPHãþD
SIST EN 60238:2000
Okovi za žarnice in sijalke z Edisonovim navojem (IEC 60238:2004) (vsebuje
popravek AC:2005)
Edison screw lampholders
Lampenfassungen mit Edisongewinde
Douilles à vis Edison pour lampes
Ta slovenski standard je istoveten z: EN 60238:2004
ICS:
29.140.10 Grla in držala žarnic Lamp caps and holders
SIST EN 60238:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 60238:2005
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SIST EN 60238:2005
EUROPEAN STANDARD EN 60238
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2004
ICS 29.140.10 Supersedes EN 60238:1998 + A1:1999 + A2:2002
Incorporates Corrigendum January 2005
English version
Edison screw lampholders
(IEC 60238:2004)
Douilles à vis Edison pour lampes Lampenfassungen mir Edisongewinde
(CEI 60238:2004) (IEC 60238:2004)
This European Standard was approved by CENELEC on 2004-10-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60238:2004 E
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SIST EN 60238:2005
EN 60238:2004 - 2 -
Foreword
The text of document 34B/1151/FDIS, future edition 8 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 was approved by CENELEC as EN 60238 on 2004-10-01.
This European Standard supersedes EN 60238:1998 + corrigendum February 1999 + A1:1999 +
A2:2002 + A2:2002/corrigendum July 2003.
In this edition the new requirements for creepage distances and clearances have been adopted which
are currently circulated by IEC/SC 34D to amend the EN 60598 family of luminaire standards.
Additionally guidances for requirements in EN 61058-1 applicable to switches in lampholders (see
Annex B) and for special requirements in appliance standards (see Annex C) have been included.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2005-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-10-01
Annex ZA has been added by CENELEC.
The contents of the corrigendum of January 2005 have been included in this copy.
__________
Endorsement notice
The text of the International Standard IEC 60238:2004 was approved by CENELEC as a European
Standard without any modification.
__________
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SIST EN 60238:2005
- 3 - EN 60238:2004
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60061 Series Lamp caps and holders together with EN 60061 Series
(mod) gauges for the control of
interchangeability and safety
1) 2)
IEC 60061-1 - Part 1: Lamp caps EN 60061-1 1993
(mod)
1) 2)
IEC 60061-2 - Part 2: Lampholders EN 60061-2 1993
(mod)
1) 2)
IEC 60061-3 - Part 3: Gauges EN 60061-3 1993
(mod)
3)
IEC 60068-2-20 1979 Basic environmental testing procedures HD 323.2.20 S3 1988
Part 2: Tests - Test T: Soldering
4)
IEC 60068-2-32 1975 Part 2: Tests - Test Ed: Free fall EN 60068-2-32 1993
IEC 60068-2-75 1997 Part 2-75: Tests - Test Eh: Hammer tests EN 60068-2-75 1997
5)
IEC 60112 1979 Method for determining the comparative HD 214 S2 1980
and the proof tracking indices of solid
insulating materials under moist
conditions
6)
IEC 60227 Series Polyvinyl chloride insulated cables of - -
rated voltages up to and including
450/750 V
7)
IEC 60245 Series Cables of rated voltages up to and - -
(mod) including 450/750 V and having cross-
linked insulation
1)
Undated reference.
2)
Valid edition at date of issue.
3)
HD 323.2.20 S3 includes A1:1987 to IEC 60068-2-20.
4)
EN 60068-2-32 includes A2:1990 to IEC 60068-2-32.
5)
HD 214 S2 is superseded by EN 60112:2003, which is based on IEC 60112:2003.
6)
The HD 21 series, which is related to, but not directly equivalent with the IEC 60227 series, applies instead.
7)
The HD 22 series, which is related to, but not directly equivalent with the IEC 60245 series, applies instead.
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SIST EN 60238:2005
EN 60238:2004 - 4 -
Publication Year Title EN/HD Year
IEC 60335-1 2001 Household and similar electrical EN 60335-1 2002
(mod) appliances - Safety + A11 2004
Part 1: General requirements
IEC 60352-1 1997 Solderless connections EN 60352-1 1997
Part 1: Wrapped connections - General
requirements, test methods and practical
guidance
1) 2)
IEC 60399 - Barrel thread for lampholders with shade EN 60399 2004
holder ring
database
IEC 60417 Graphical symbols for use on equipment - -
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code) + corr. May 1993
A1 1999 A1 2000
IEC 60598 Series Luminaires EN 60598 Series
(mod)
1) 2)
IEC 60598-1 - Part 1: General requirements and tests EN 60598 2004
IEC 60664-1 1992 Insulation coordination for equipment
+ A1 2000 within low-voltage systems
+ A2 2002 Part 1: Principles, requirements and tests EN 60664-1 2003
IEC 60695-2-2 1991 Fire hazard testing – EN 60695-2-2 1994
Part 2: Test methods – Section 2: Needle-
flame test
IEC 60695-2-10 2000 Part 2-10: Glowing/hot-wire based test EN 60695-2-10 2001
methods –
Glow-wire apparatus and common test
procedure
IEC 60695-2-11 2000 Part 2-11: Glowing/hot-wire based test EN 60695-2-11 2001
methods –
Glow-wire flammability test method for end-
products
IEC 61058-1 2000 Switches for appliances –
+ A1 (mod) 2001 Part 1: General requirements EN 61058-1 2002
ISO 4046-4 2002 Paper, board, pulp and related terms – – –
Vocabulary –
Part 4: Paper and board grades and
converted products
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SIST EN 60238:2005
NORME CEI
INTERNATIONALE
IEC
60238
INTERNATIONAL
Huitième édition
STANDARD
Eighth edition
2004-10
Douilles à vis Edison pour lampes
Edison screw lampholders
IEC 2004 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
XC
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
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SIST EN 60238:2005
60238 IEC:2004 – 3 –
CONTENTS
FOREWORD.7
1 General.11
2 Definitions.15
3 General requirement.21
4 General conditions for tests .23
5 Standard ratings.25
6 Classification.27
7 Marking.29
8 Dimensions.33
9 Protection against electric shock.37
10 Terminals.41
11 Provision for earthing.49
12 Construction.51
13 Switched lampholders.61
14 Moisture resistance, insulation resistance and electric strength .65
15 Mechanical strength.69
16 Screws, current-carrying parts and connections .77
17 Creepage distances and clearances.81
18 Normal operation.85
19 General resistance to heat .87
20 Resistance to heat, fire and tracking .93
21 Resistance to excessive residual stresses (season cracking) and to rusting .97
Annex A (normative) Season cracking/corrosion test . 101
Annex B (informative) Guidance for requirements in IEC 61058-1 applicable to switches
in lampholders (see 13.2). 105
Annex C (informative) Guidance for special requirements in appliance standards –
Household and similar electrical appliances. 109
Figure 1a – Nipple thread for lampholders. Basic profile and design profile for the nut
and for the screw . 113
Figure 1b – Nipple thread for lampholders. Basic profile and design profile for the nut
and for the screw . 115
Figure 2a – Gauges for metric ISO thread for nipples . 117
Figure 2b – Gauges for ISO standard pipe thread for nipples . 119
Figure 3 – Gauge for holes for backplate lampholder screws . 121
Figure 4 – Normal operation test apparatus . 123
Figure 5 – Test caps for the test of clause 18 . 125
Figure 6 – Torque apparatus . 127
Figure 7 – Tumbling barrel . 129
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SIST EN 60238:2005
60238 IEC:2004 – 5 –
Figure 8 – Impact-test apparatus . 131
Figure 8a – Mounting support . 131
Figure 9 – Pressure apparatus . 133
Figure 10 – Ball-pressure test apparatus . 133
Figure 11 – Test cap for the tests of 14.4 and 19.3 . 135
Figure 12 – Bending apparatus. 137
Figure 13 – Test cap A and test cap B for lampholders E14 . 139
Figure 13 – Test cap A and test cap B for lampholders E14 (continued) . 141
Figure 14 – Test cap for lampholders E27 . 143
Figure 15 – Test cap for lampholders E40 . 145
Figure 16 – Standard test finger (according to IEC 60529) . 147
Figure 17 – Clarification of some definitions . 149
Figure 18 – Preparation of specimens for the needle-flame test of 20.4 . 151
Table 1 – Thickness of screw shells and contacts.35
Table 2 – Minimum effective screw lengths.35
Table 3 – Dimensions of threaded entries and set screws.37
Table 4 – Minimum dimensions of pillar-type terminals .45
Table 5 – Minimum dimensions of screw-type terminals.45
Table 6 – Pull and torque values .57
Table 7 – Insertion torque .61
Table 8 – Minimum and maximum removal torques .61
Table 9 – Test cap dimensions.69
Table 10 – Heights of fall .73
Table 11 – Maximum deformation values.75
Table 12 – Torque values.79
Table 13a – Minimum distances for a.c. (50/60 Hz) sinusoidal voltages Impulse
withstand category II .83
Table 13b – Minimum distances for a.c. (50/60 Hz) sinusoidal voltages Impulse
withstand category III .83
Table 14 – Minimum distances for non-sinusoidal pulse voltages .85
Table 15 – Heating cabinet temperatures .91
Table A.1 – pH adjustment . 101
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SIST EN 60238:2005
60238 IEC:2004 – 7 –
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 eighth edition cancels and replaces the seventh edition published in 1998 and its
amendments 1 (1999) and 2 (2002). This eighth edition constitutes a technical revision.
In this edition the new requirements for creepage distances and clearances have been adopted
which are currently circulated by SC34D to amend the IEC 60598 family of luminaire standards.
Additionally guidances for requirements in IEC 61058-1 applicable to switches in lampholders
(see Annex B) and for special requirements in appliance standards (see Annex C) have been
included.
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SIST EN 60238:2005
60238 IEC:2004 – 9 –
The text of this standard is based on the following documents:
FDIS Report on voting
34B/1151/FDIS 34B/1170/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.
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result 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 60238:2005
60238 IEC:2004 – 11 –
EDISON SCREW LAMPHOLDERS
1 General
1.1 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 a.c. 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 shall be 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,
e.g. where explosions are liable to occur, special constructions may be required.
NOTE 1 This standard does not apply to three-light lampholders E26d.
NOTE 2 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.
NOTE 3 If the nominal voltage of the supply does not exceed 130 V, the maximum current for caps E40 is 32 A
(see 4.5 and 5.3).
NOTE 4 Where lampholders are used in luminaires, their maximum operating temperatures are specified in
IEC 60598.
___________
*
Requirements for lampholders suitable for semi-luminaires are under consideration.
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SIST EN 60238:2005
60238 IEC:2004 – 13 –
1.2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
NOTE With regard to IEC 60598-1, the references cited in this document are liable to change.
IEC 60061 (all parts), Lamp caps and holders together with gauges for the control of
interchangeability and safety
IEC 60061-1: Lamp caps and holders together with gauges for the control of interchangeability
and safety – Part 1: Lamp caps
IEC 60061-2: Lamp caps and holders together with gauges for the control of interchangeability
and safety – Part 2: Lampholders
IEC 60061-3: Lamp caps and holders together with gauges for the control of interchangeability
and safety – Part 3: Gauges
IEC 60068-2-20:1979, Environmental testing – Part 2: Tests – Test T: Soldering
IEC 60068-2-32:1975, Environmental testing – Part 2: Tests – Test Ed: Free fall
IEC 60068-2-75:1997, Environmental testing – Part 2: Tests – Test Eh: Hammer tests
IEC 60112:1979, Method for determining the comparative and the proof tracking indices of solid
insulating materials under moist conditions
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V
IEC 60245 (all parts), Rubber insulated cables – Rated voltages up to and including 450/750 V
IEC 60335-1:2001, Household and similar electrical appliances – Safety – Part 1: General
requirements
IEC 60352-1:1997, Solderless connections – Part 1: Wrapped connections – General require-
ments, test methods and practical guidance
IEC 60399, Barrel thread for lampholders with shade holder ring
**)
IEC 60417-DB:2002 Graphical symbols for use on equipment
*)
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
Amendment 1 (1999)
IEC 60598 (all parts and sections), Luminaires
IEC 60598-1: Luminaires – Part 1: General requirements and tests
IEC 60664-1:1992, Insulation coordination for equipment within low-voltage systems – Part 1:
***)
Principles, requirements and tests
Amendment 1 (2000)
Amendment 2 (2002)
___________
)
* A consolidated edition 2.1 (2001) exists including edition 2.0 (1989) and its amendment 1(1999).
**) “DB” refers to the IEC on-line database.
***)
A consolidated edition 1.2 (2002) exists including edition 1.0 (1992) and its amendment 1 (2000) and
amendment 2 (2002).
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SIST EN 60238:2005
60238 IEC:2004 – 15 –
IEC 60695-2-2:1991, Fire hazard testing – Part 2: Test methods – Section 2: Needle-flame test
IEC 60695-2-10:2000, Fire hazard testing – Part 2–10: Glowing/hot-wire based test methods –
Glow-wire apparatus and common test procedure
IEC 60695-2-11:2000, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end products
IEC 61058-1:2000, Switches for appliances – Part 1: General requirements
ISO 4046-4:2002, Paper, board, pulps and related terms – Vocabulary – Part 4: Paper and
board grades and converted products
2 Definitions
For the purpose of this International Standard, the following definitions apply. For clarification
of some definitions, see also figure 17.
2.1
cord-grip lampholder
a lampholder incorporating a method of retaining a flexible cord by which it may then be
suspended
2.2
threaded entry lampholder
a lampholder incorporating a threaded component at the point of entry of the supply wires
permitting the lampholder to be mounted on a mating threaded support (formerly called "nipple
lampholder")
2.3
backplate lampholder
a lampholder so designed as to be suitable for mounting by means of an associated or integral
back plate, directly onto a supporting surface or appropriate box
2.4
lampholder for building-in
a lampholder designed to be built into a luminaire, an additional enclosure or the like
2.4.1
unenclosed lampholder
a lampholder for building-in so designed that it requires additional means, for example an enclo-
sure, to meet the requirements of this standard with regard to protection against electric shock
2.4.2
enclosed lampholder
a lamphol
...
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