IEC 61184:2017
(Main)Bayonet lampholders
Bayonet lampholders
IEC 61184:2017 This document applies to bayonet lampholders B15d and B22d for connection of lamps and semi-luminaires to a supply voltage of 250 V.
This document also covers lampholders which are integral with a luminaire or intended to be built into appliances. It covers the requirements for the lampholder only.
This fourth edition cancels and replaces the third edition published in 2008 and Amendment 1:2011. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) Restructuring of the standard in accordance with IEC Directives Part 2.
b) Clause 18: Update on creepage distances and clearances;
c) Addition of Annex B.
Douilles à baïonnette
L'IEC 61184:2017 Le présent document s'applique aux douilles à baïonnette B15d et B22d destinées à connecter les lampes et les semi-luminaires à une tension d'alimentation de 250 V.
Le présent document couvre également les douilles qui sont intégrées dans un luminaire ou destinées à être incorporées dans des appareils. Il couvre uniquement les exigences applicables à la douille.
Cette quatrième édition annule et remplace la troisième édition parue en 2008 et son Amendement 1:2011. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) Restructuration de la norme conformément aux Directives IEC, Partie 2.
b) Article 18: Mise à jour des distances dans l’air et des lignes de fuite;
c) Ajout de l’Annexe B.
General Information
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Standards Content (Sample)
IEC 61184 ®
Edition 4.2 2024-07
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Bayonet lampholders
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IEC 61184 ®
Edition 4.2 2024-07
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Bayonet lampholders
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.140.10 ISBN 978-2-8322-9402-4
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CONTENTS
FOREWORD . 4
INTRODUCTION . 6
INTRODUCTION to Amendment 1 . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
3.1 Materials . 8
3.2 Means of fixing . 9
4 General requirements . 13
5 General conditions for tests . 13
6 Standard ratings . 14
6.1 Standard rated voltage . 14
6.2 Standard rated currents . 15
7 Classification . 15
8 Marking . 16
9 Dimensions. 18
10 Protection against electric shock . 19
11 Terminals . 20
12 Provision for earthing . 22
13 Construction . 24
14 Switched lampholders . 28
15 Moisture resistance, insulation resistance and electrical strength . 29
16 Mechanical strength . 31
17 Screws, current-carrying parts and connections . 34
18 Creepage distances and clearances . 35
19 General resistance to heat . 37
20 Resistance to heat, fire and tracking . 41
21 Resistance to excessive residual stresses (season cracking) and to rusting . 43
Annex A (normative) Season cracking/corrosion test . 61
A.1 General . 61
A.2 Test cabinet . 61
A.3 Test solution . 61
A.4 Test procedure . 62
Annex B (informative) Schedule of amended clauses and subclauses containing more
serious/critical requirements which require products to be retested . 63
Bibliography . 64
Figure 1 – Loading device (see 16.1) . 44
Figure 2 – Bending apparatus (see 16.4) . 45
Figure 3 – Gauge for holes for backplate lampholders screws (see 13.11) . 46
Figure 4 – Clarification of some of the definitions in Clause 3 . 47
Figure 5 – Test cap B15d (see 19.3) . 48
Figure 6 – Test cap B22d (see 19.3) . 49
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Figure 7 – Testing device (see 10.1) . 50
Figure 8 – Dimensions for shade support devices (see 9.1) . 51
Figure 9 – Dimensions for protective shields for B22d lampholders (see 10.1) . 52
Figure 10 – Test cap B15d (see 15.3) . 53
Figure 11 – Test cap B22d (see 15.3) . 54
Figure 12 – Typical apparatus for the heating test (see 19.5) . 56
Figure 13 – Nipple thread for lampholders – Basic profile and design profile for the nut
and for the screw . 56
Figure 14 – Gauges for metric thread for nipples . 57
Figure 15 – Impact-test apparatus . 58
Figure 16 – Mounting support . 59
Figure 17 – Ball-pressure test apparatus. 59
Figure 18 – Pressure apparatus . 60
Table 1 – Dimensions of threaded entries and set screws . 19
Table 2 – Minimum dimensions of pillar type terminals . 21
Table 3 – Limits for contact forces . 24
Table 4 – Pull and torque values . 27
Table 5 – Heights of fall . 33
Table 6 – Maximum deformation values . 34
Table 7 – Torque values . 35
Table 8 – Minimum distances for AC (50/60 Hz) sinusoidal voltages – Impulse
withstand category II . 36
Table 9 – Heating cabinet temperature . 37
Table 10 – Heating cabinet temperature . 38
Table 11 – Test temperature and test lamp data . 40
Table A.1 – pH adjustment . 61
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
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BAYONET 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
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agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
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https://patents.iec.ch. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendments has been
prepared for user convenience.
IEC 61184 edition 4.2 contains the fourth edition (2017-05) [documents 34B/1898/FDIS
and 34B/1905/RVD], its amendment 1 (2019-12) [documents 34B/2030/CDV and
34B/2041A/RVC] and its amendment 2 (2024-07) [documents 34B/2194/FDIS and
34B/2196/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendments 1 and 2. Additions are in green text, deletions are in
strikethrough red text. A separate Final version with all changes accepted is available
in this publication.
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International Standard IEC 61184 has been prepared by subcommittee 34B: Lamp caps and
holders, of IEC technical committee 34: Lamps and related equipment.
This fourth edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Restructuring of the standard in accordance with IEC Directives Part 2.
b) Clause 18: Update on creepage distances and clearances;
c) Addition of Annex B.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
In this standard, the following print types are used:
– requirements proper: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
The committee has decided that the contents of this document and its amendments will
remain unchanged until the stability date indicated on the IEC website under webstore.iec.ch
in the data related to the specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
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INTRODUCTION
This document covers safety requirements for bayonet lampholders and includes references
to IEC 60061 (all parts) for the control of interchangeability and safety of the cap and holder
fit.
NOTE Safety requirements ensure that electrical equipment constructed in accordance with these requirements
does not endanger the safety of persons, domestic animals or property when properly installed and maintained and
used in applications for which it was intended.
The thermal characteristics of lampholders are specified by the rated operating temperature
(symbol T), which is the highest temperature for which the lampholder is designed. The
temperature rating and the resistance to heat specified in this document are based on two
different principles, as presently found in IEC 60238 for Edison screw lampholders and in
other national standards for bayonet lampholders. After experience, it may be possible to
rationalize the systems in future editions of this document.
INTRODUCTION to Amendment 1
Some changes and corrections needed for IEC 61184 became obvious during the work on the
fourth edition of IEC 61184.
Change 1:
Actual lamp holder safety standards require a ball pressure test in line with IEC 60695-10-2 in
sections "Resistance to heat, fire and tracking". Within this test there is an alternative depth
indentation method described for the calculation of the indentation diameter.
This alternative calculation option was removed from the latest edition of IEC 60695-10-2
dated 2014 and during its meeting held in Sydney in 2018, SC 34B/WG1 agreed to delete the
alternative method as well from IEC 61184.
Change 2:
Based on IEC 60664-1:2007, 4.8.1.5 "Non tracking materials":
"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."
This is not completely reflected in TC 34 standards as revised recently. For applications with
ELV it is of high importance whether the creepage distance shall be 0,6 mm or may be
0,2 mm in the case where inorganic insulating material is used.
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BAYONET LAMPHOLDERS
1 Scope
This document applies to bayonet lampholders B15d and B22d for connection of lamps and
semi-luminaires to a supply voltage of 250 V.
This document also covers lampholders which are 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, 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. Lampholders for use by luminaire manufacturers only are not for retail sale.
Where lampholders are used in luminaires, their maximum operating temperatures are
specified in IEC 60598-1.
B15d denotes the cap/holder fit as defined by IEC 60061-1, sheet 7004-11 and IEC 60061-2,
sheet 7005-16 with the corresponding gauges.
B22d denotes the cap/holder fit as defined by IEC 60061-1, sheet 7004-10 and IEC 60061-2,
sheet 7005-10 with the corresponding gauges.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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.
IEC 60061 (all parts), Lamp caps and holders together with gauges for the control of
interchangeability and safety (available at http://std.iec.ch/iec60061)
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 60068-2-75:2014, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60112:2003, Method for the determination of the proof and the comparative tracking
indices of solid insulating materials
IEC 60112:2003/AMD1:2009
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V
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IEC 60245 (all parts), Rubber insulated cables – Rated voltages up to and including
450/750 V
IEC 60399, Barrel thread for lampholders with shade holder ring
IEC 60417, Graphical symbols for use on equipment (available at http://www.graphical-
symbols.info/equipment)
IEC 60432 (all parts), Incandescent lamps – Safety specifications
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60529:1989/AMD1:1999
IEC 60529:1989/AMD2:2013
IEC 60598-1, Luminaires – Part 1: General requirements and tests
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60695-2-11:2014, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products (GWEPT)
IEC 60695-11-5, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method –
Apparatus, confirmatory test arrangement and guidance
ISO 4046-4:2016, Paper, board, pulps and related terms – Vocabulary – Part 4: Paper and
board grades and converted products
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Materials
3.1.1
plastic lampholder
lampholder, the exterior of which is made wholly of plastic material
Note 1 to entry: The exterior is any part of the lampholder which, when wired and fully assembled and fitted with
the testing device shown in Figure 7, can be touched directly by the standard test finger of IEC 60529:1989 and
IEC 60529:1989/AMD1:1999.
3.1.2
ceramic lampholder
lampholder, the exterior of which is made wholly of ceramic material
Note 1 to entry: See note in 3.1.1.
3.1.3
metal lampholder
lampholder, the exterior of which is made wholly or partly of metal
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Note 1 to entry: See note in 3.1.1.
3.2 Means of fixing
3.2.1
cord grip lampholder
lampholder incorporating a method of retaining a flexible cord by which it may be suspended
SEE: Figure 4a).
3.2.2
threaded entry lampholder
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
Note 1 to entry: A threaded entry lampholder was formerly called “nipple lampholder”.
SEE: Figure 4b).
3.2.3
backplate lampholder
lampholder so designed as to be suitable for mounting, by means of an associated or integral
backplate, directly on to a supporting surface or appropriate box
SEE: Figure 4c).
3.3
terminal/contact assembly
part or assembly of parts which provides a means of connection between the termination of a
supply conductor and the contact-making surfaces of the corresponding lamp cap as well as
resilient means to maintain contact pressure
Note 1 to entry: A rising type is where the terminal is allowed to rise parallel with the lamp axis on insertion of a
lamp cap.
Note 2 to entry: A non-rising type is where the terminal is not allowed to rise on insertion of a lamp cap;
Note 3 to entry: The terminal and the barrel can be a unique element.
SEE: Figure 4.
3.4
union ring
cylindrical component which joins together separate external parts of the lampholder
SEE: Figure 4.
3.5
shade ring
cylindrical component having an internal thread or other means to engage a corresponding
support on the outer shell and intended to carry or retain a shade
SEE: Figure 4.
3.6
skirt
component similar to a shade ring but having a longer cylindrical form to extend to the full
length of the lampholder body
Note 1 to entry: Applicable to plastic lampholders only.
SEE: Figure 4.
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3.6.1
protective shield
component similar to a skirt but having a flared open end to protect the user from accidental
contact with the lamp cap
Note 1 to entry: Applicable to plastic lampholders only.
SEE: Figure 9.
3.7
dome
part of a cord grip lampholder or threaded entry lampholder which shields the connecting
terminals
SEE: Figure 4.
3.8
barrel
part of a lampholder which serves for mechanical connection of the lamp cap with the
lampholder
SEE: Figure 4.
3.9
lampholder for building-in
lampholder designed to be built into a luminaire, an additional enclosure or the like
3.9.1
unenclosed lampholder
lampholder for building-in so designed that it requires additional means, for example
enclosures, to meet the requirements of IEC 61184 with regard to protection against electric
shock
3.9.2
enclosed lampholder
lampholder for building-in so designed that, on its own, it fulfils the requirements of IEC 61184
with regard to protection against electric shock and, if appropriate, IP classification
3.10
independent lampholder
lampholder so designed that it can be mounted separately from a luminaire and at the same
time provide all the necessary protection according to its classification and marking
3.11
switched lampholder
lampholder provided with an integral switch to control the supply to the lamp
3.12
basic insulation
insulation applied to live parts to provide basic protection against electric shock
Note 1 to entry: Basic insulation does not necessarily include insulation used exclusively for functional purposes.
3.13
supplementary insulation
independent insulation applied in addition to basic insulation in order to provide protection
against electric shock in the event of a failure of basic insulation
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3.14
double insulation
insulation comprising both basic insulation and supplementary insulation
3.15
reinforced insulation
single insulation system applied to live parts which provides a degree of protection against
electric shock equivalent to double insulation under the conditions specified
Note 1 to entry: The term "insulation system" does not imply that the insulation is one homogeneous piece. It may
comprise several layers which cannot be tested singly as supplementary or basic insulation.
3.16
live part
conductive part which may cause an electric shock in normal use
Note 1 to entry: The neutral conductor is, however, regarded as a live part.
Note 2 to entry: The test to determine whether or not a conductive part is a live part which may cause an electric
shock is given in Annex A of IEC 60598-1.
3.17
type test
test or series of tests made on a type test specimen for the purpose of checking compliance
of the design of a given product with the requirements of the relevant standard
3.18
type test sample
sample consisting of one or more similar specimens submitted by the manufacturer or
responsible vendor for the purpose of a type test
3.19
semi-luminaire
unit similar to a self-ballasted lamp but designed to utilize a replaceable light source and/or
starting device
3.20
rated operating temperature
highest temperature for which the lampholder is designed
3.21
rated ignition voltage
highest peak of an ignition pulse voltage that the holder is able to withstand
3.22
impulse withstand category
numeral defining a transient overvoltage condition
Note 1 to entry: Impulse withstand categories I, II, III and IV are used.
a) Purpose of classification of impulse withstand categories
Impulse withstand categories are to distinguish different degrees of availability of equipment with regard to
required expectations on continuity of service and on an acceptable risk of failure.
By selection of impulse withstand levels of equipment, insulation co-ordination can be achieved in the whole
installation reducing the risk of failure to an acceptable level providing a basis for overvoltage control.
A higher characteristic numeral of an impulse withstand category indicates a higher specific impulse withstand
of the equipment and offers a wider choice of methods for overvoltage control.
The concept of impulse withstand categories is used for equipment energized directly from the mains.
b) Description of impulse withstand categories
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Equipment of impulse withstand category I is equipment which is intended to be connected to the fixed
electrical installations of buildings. Protective means are taken outside the equipment − either in the fixed
installation or between the fixed installation and the equipment − to limit transient overvoltages to the specific
level.
Equipment of impulse withstand category II is equipment to be connected to the fixed electrical installations of
buildings.
Equipment of impulse withstand category III is equipment which is part of the fixed electrical installations and
other equipment where a higher degree of availability is expected.
Equipment of impulse withstand category IV is for use at or in the proximity of the origin of the electrical
installations of buildings upstream of the main distribution board.
3.23
primary circuit
circuit which is directly connected to the AC mains supply
Note 1 to entry: It includes, for example, the means for connection to the AC mains supply, the primary windings
of transformers, motors and other loading devices.
3.24
secondary circuit
circuit which has no direct connection to a primary circuit and derives its power from a
transformer, converter or equivalent isolation device, or from a battery
Note 1 to entry: Exception: autotransformers. Although having direct connection to a primary circuit, the tapped
part of them is also deemed to be a secondary circuit in the above sense.
Note 2 to entry: Mains transients in such a circuit are attenuated by the corresponding primary windings. Also
inductive ballasts reduce the mains transient voltage height. Therefore, components located after a primary circuit
or after an inductive ballast can be suited for an impulse withstand category of one step lower, i.e. for impulse
withstand category II.
3.25
enclosed reinforced insulated lampholder
lampholder for building-in, so designed that on its own it fulfils the requirements for double or
reinforced insulated parts in class II applications
3.26
partly reinforced insulated lampholder
lampholder for building-in, so designed that some parts of the lampholder require additional
means to fulfil the requirements with regard to double or reinforced insulation
Note 1 to entry: In some cases, the dimensions might be achieved only after mounting into the luminaire.
3.27
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]
3.28
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]
3.29
rated current
current declared by the manufacturer to indicate the highest current for which the lampholder
is intended
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[SOURCE: IEC 60838-1:2016, 3.3]
3.30
ignition voltage
peak voltage applied to ignite a discharge lamp
[SOURCE: IEC 61347-1:2015, 3.46]
3.30.1
ignition pulse voltage
peak ignition voltage with a total duration of ≤ 750 µs (summation of all pulse 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]
4 General requirements
Lampholders shall be so designed and constructed that in normal use they function reliably
and cause no danger to persons or surroundings.
In general, compliance is checked by carrying out all the relevant tests specified.
Independent lampholders, not specifically intended for building-in, shall comply with the
requirements of the following sections and subclauses of IEC 60598-1 where the subject-
matter of these headings is not dealt with in the present document.
Section 2 – Classification
Section 3 – Marking
Section 4 – Construction (as appropriate)
Section 8 – Protection against electric shock
Section 9 – Resistance to dust, solid objects and moisture
Section 10 – Insulation resistance and electric strength (for class II)
Subclauses 12.4 and 12.5 – Thermal tests
5 General conditions for tests
5.1 Tests according to this document are type tests.
NOTE The requirements and tolerances given in this document are related to testing of a type test sample
submitted for that purpose. Compliance of the type test sample does not ensure compliance of the whole
production of a manufacturer with this safety standard. In addition to type testing, conformity of production is the
responsibility of the manufacturer and can include routine tests and quality control.
For further information see IEC 60061-4, sheet 7007-13.
5.2 Unless otherwise specified, the samples are tested as delivered and installed as in
normal use without lamps, at an ambient temperature of 20 °C ± 5 °C.
5.3 All inspections and tests are carried out on a total of:
– 8 specimens for unswitched lampholders, or
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– 11 specimens for switched lampholders;
in the order of the clauses as follows:
– 3 specimens: Clauses 4 to 13;
– 3 specimens: Clauses 15 to 19;
– 3 specimens: Clause 14 (switched lampholder tests only);
– 2 specimens: Clauses 20 and 21.
For testing of screwless terminals according to 11.2, separate additional specimens are
required.
This is also necessary for independent lampholders not specifically intended for building-in
(see Clause 4).
5.4 If no lampholder fails in the complete series of tests specified in 5.3, then lampholders
of that type shall be deemed to comply with this document.
If one lampholder fails in any group in the complete series of tests specified in 5.3, the
lampholders of that type shall be deemed to have failed to comply with this document, unless
that lampholder can be shown to be not representative of normal production or design, in
which case a further set of lampholders shall be submitted to the test or tests in that group.
Generally, it will be necessary to only repeat the test in which failure occurs. However, if the
lampholder fails in the test specified in Clauses 15 to 19 inclusive, the tests shall be repeated
from the tests of Clause 15 onwards.
An additional type test sample may be submitted, together with the first type test sample, in
case one lampholder fails, in which case the additional type test sample shall then be tested
and shall only be rejected if a further failure occurs. If there is no failure in this retest, then
lampholders of that type shall be deemed to comply with this document. If the additional type
test sample is not submitted at the same time, a failure of one lampholder shall entail a
rejection.
If more than one specimen fails in the complete series of tests specified in 5.3 then
lampholders of that type shall be deemed to have failed to comply with this document.
NOTE In view of the duration of the test procedure, lampholders differing only in detail and having the same
constructional principles and materials can be covered by a single series of type tests, subject to agreement
between applicant and test house.
6 Standard ratings
6.1 Standard rated voltage
For all lampholders only a rated voltage of 250 V is allowed.
Lampholders B15d are not intended for use in circuits with ignitors.
Lampholders B22d shall not be used in circuits with ignitors without approval from the
lampholder manufacturer.
NOTE From a theoretical point of view, the minimum creepage distance required for a holder B22d will result in a
clearance sufficient to withstand an ignition voltage of 2,5 kV.
The measures required to allow easy contact travel and lamp removal might in some situations, however, be
accompanied by unforeseen reduction of the clearance without influence on normal operation (without ignition)
where only the creepage distances are critical.
BY22d lampholders are specially designed for use in ignitor circuits.
+AMD2:2024 CSV IEC 2024
6.2 Standard rated currents
Standard rated currents are:
– 2 A for lampholders B15d;
– 2 A for lampholders B22d.
The rated current shall be not less than the standard value. Rated currents higher than 2 A
are allowed.
Compliance with the requirements of 6.1 and 6.2 is checked by inspection of the marking.
7 Classification
Lampholders are classified:
7.1 According to the material of the exterior:
– lampholders whose exterior is made wholly of plastic material;
– lampholders whose exterior is made wholly of ceramic material;
– lampholders whose exterior is made wholly or partly of metal.
NOTE For the definition of "exterior", see the note in 3.1.1.
Lampholders with external parts consisting partly of metal and lampholders comprising
external parts of insulating material with a conductive outer surface, for example a metallized
outer shell, are considered as metal lampholders.
This does not apply to threaded entries and external parts, as for example a metal shade ring
mounted on to the outside of a lampholder of insulating material, which cannot become live
even in the case of an insulation fault. Metal lampholders with insulating coverings are
considered as metal lampholders.
If in doubt as to whether or not a surface is conductive, two stripe-electrodes 1,5 mm wide,
25 mm long and with a distance of 2 mm from each other are applied to the surface (e.g. with
silver conductive paint). In accordance with 15.3, the insulating resistance is measured
between the stripes. The surface is considered to be conductive if the resistance is less than
5 MΩ.
7.2 According to degree of protection against solid objects and ingress of water:
– ordinary lampholders;
– drip-proof lampholders.
NOTE A classification for higher degrees of protection against ingress of water is under consideration.
7.3 According to method of fixing:
– threaded entry lampholders;
– cord grip lampholders;
– backplate lampholders;
– other lampholders.
NOTE Examples of other lampholders are lampholders provided with a mechanical suspension device, for
example a hook.
REDLINE VERSION – 16 – IEC 61184:2017+AMD1:2019
+AMD2:2024 CSV IEC 2024
7.4 According to type:
– switched lampholders provided with an integral switch to control the supply to the lamp;
– non-switched lampholders.
7.5 According to protection against electric shock:
– unenclosed lampholders;
– enclosed lampholders;
– independent lampholders;
– partly reinforced insulated lampholders;
– enclosed reinforced insulated lampholders.
Where a lampholder is used with a working voltage of 50 % or less of its maximum rating, it
may be regarded as equivalent to a reinforced insulated lampholder. Lampholders having a
metal barrel are not classified as reinforced insulated.
7.6 According to resistance to heat:
– without T marking, suitable for rated operating temperatures up to and including 135 °C for
B15d lampholders and 165 °C for B22d lampholders;
– –with Txxx marking, suitable for rated operating temperatures up to and including the
temperature marked or declared by the manufacturer. These temperatures shall be not
lower than 140 °C for B15d lampholders and not lower than 170 °C for B22d lampholders;
The value of the temperature marking is increased by steps of 10 °C.
– with T1 marking, suitable for temperatures on the lamp cap up to and including 165 °C;
NOTE The continued use of T1 lampholders is subject to review.
– with T2 marking, suitable for temperatures on the lamp cap up to and including 210 °C.
8 Marking
8.1 Lampholders shall be marked with:
– rated voltage, in volts;
– rated operating temperature Txxx, T1 or T2, if applicable (see 6.6).
In the first version, the letter T shall be followed by the value of the rated operating
temperature in degrees Celsius;
– symbol for nature of supply, if required (for switched lampholders only);
– for lampholders whose exterior is made wholly of ceramic material, information on the
rated operating temperature, if applicable, shall either be marked on the lampholder or
given in the manufacturer's catalogue;
– mark of origin (this may take the form of a trade mark, or the manufacturer's or
responsible vendor's name or identification mark);
NOTE The mark of origin is not intended to mean the country of origin.
– either a unique catalogue number or an identifying reference;
Available technical documentation of the manufacturer such as printed catalogues or
online catalogues should allow a clear identification of a lampholder either by a unique
catalogue number or by an identifying reference on the holder, specifying the essential
characteristic features and the basic design of the product supplemented by a clear
description. Variations of the basic design such as, for example, different cable length,
fixing means, colours, which do not affect safety or performance of the lampholder, may
be disregarded in the type
...
IEC 61184 ®
Edition 4.0 2017-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Bayonet lampholders
Douilles à baïonnette
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IEC 61184 ®
Edition 4.0 2017-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Bayonet lampholders
Douilles à baïonnette
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.10 ISBN 978-2-8322-4361-9
– 2 – IEC 61184:2017 IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
3.1 Materials . 8
3.2 Means of fixing . 9
4 General requirements . 13
5 General conditions for tests . 13
6 Standard ratings . 14
6.1 Standard rated voltage . 14
6.2 Standard rated currents . 15
7 Classification . 15
8 Marking . 16
9 Dimensions. 18
10 Protection against electric shock . 19
11 Terminals . 20
12 Provision for earthing . 22
13 Construction . 24
14 Switched lampholders . 28
15 Moisture resistance, insulation resistance and electrical strength . 29
16 Mechanical strength . 31
17 Screws, current-carrying parts and connections . 34
18 Creepage distances and clearances . 35
19 General resistance to heat . 37
20 Resistance to heat, fire and tracking . 41
21 Resistance to excessive residual stresses (season cracking) and to rusting . 43
Annex A (normative) Season cracking/corrosion test . 61
A.1 General . 61
A.2 Test cabinet . 61
A.3 Test solution . 61
A.4 Test procedure . 62
Annex B (informative) Schedule of amended clauses and subclauses containing more
serious/critical requirements which require products to be retested . 63
Bibliography . 64
Figure 1 – Loading device (see 16.1) . 44
Figure 2 – Bending apparatus (see 16.4) . 45
Figure 3 – Gauge for holes for backplate lampholders screws (see 13.11) . 46
Figure 4 – Clarification of some of the definitions in Clause 3 . 47
Figure 5 – Test cap B15d (see 19.3) . 48
Figure 6 – Test cap B22d (see 19.3) . 49
Figure 7 – Testing device (see 10.1) . 50
Figure 8 – Dimensions for shade support devices (see 9.1) . 51
Figure 9 – Dimensions for protective shields for B22d lampholders (see 10.1) . 52
Figure 10 – Test cap B15d (see 15.3) . 53
Figure 11 – Test cap B22d (see 15.3) . 54
Figure 12 – Typical apparatus for the heating test (see 19.5) . 56
Figure 13 – Nipple thread for lampholders – Basic profile and design profile for the nut
and for the screw . 56
Figure 14 – Gauges for metric thread for nipples . 57
Figure 15 – Impact-test apparatus . 58
Figure 16 – Mounting support . 59
Figure 17 – Ball-pressure test apparatus. 59
Figure 18 – Pressure apparatus . 60
Table 1 – Dimensions of threaded entries and set screws . 19
Table 2 – Minimum dimensions of pillar type terminals . 21
Table 3 – Limits for contact forces . 24
Table 4 – Pull and torque values . 27
Table 5 – Heights of fall . 33
Table 6 – Maximum deformation values . 34
Table 7 – Torque values . 35
Table 8 – Minimum distances for AC (50/60 Hz) sinusoidal voltages – Impulse
withstand category II . 36
Table 9 – Heating cabinet temperature . 37
Table 10 – Heating cabinet temperature . 38
Table 11 – Test temperature and test lamp data . 40
Table A.1 – pH adjustment . 61
– 4 – IEC 61184:2017 IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
BAYONET 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 61184 has been prepared by subcommittee 34B: Lamp caps and
holders, of IEC technical committee 34: Lamps and related equipment.
This fourth edition cancels and replaces the third edition published in 2008 and
Amendment 1:2011. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Restructuring of the standard in accordance with IEC Directives Part 2.
b) Clause 18: Update on creepage distances and clearances;
c) Addition of Annex B.
The text of this standard is based on the following documents:
FDIS Report on voting
34B/1898/FDIS 34B/1905/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:
– requirements proper: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
The committee has decided that the contents of the base publication and its amendments 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.
– 6 – IEC 61184:2017 IEC 2017
INTRODUCTION
This document covers safety requirements for bayonet lampholders and includes references
to IEC 60061 (all parts) for the control of interchangeability and safety of the cap and holder
fit.
NOTE Safety requirements ensure that electrical equipment constructed in accordance with these requirements
does not endanger the safety of persons, domestic animals or property when properly installed and maintained and
used in applications for which it was intended.
The thermal characteristics of lampholders are specified by the rated operating temperature
(symbol T), which is the highest temperature for which the lampholder is designed. The
temperature rating and the resistance to heat specified in this document are based on two
different principles, as presently found in IEC 60238 for Edison screw lampholders and in
other national standards for bayonet lampholders. After experience, it may be possible to
rationalize the systems in future editions of this document.
BAYONET LAMPHOLDERS
1 Scope
This document applies to bayonet lampholders B15d and B22d for connection of lamps and
semi-luminaires to a supply voltage of 250 V.
This document also covers lampholders which are 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, 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. Lampholders for use by luminaire manufacturers only are not for retail sale.
Where lampholders are used in luminaires, their maximum operating temperatures are
specified in IEC 60598-1.
B15d denotes the cap/holder fit as defined by IEC 60061-1, sheet 7004-11 and IEC 60061-2,
sheet 7005-16 with the corresponding gauges.
B22d denotes the cap/holder fit as defined by IEC 60061-1, sheet 7004-10 and IEC 60061-2,
sheet 7005-10 with the corresponding gauges.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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.
IEC 60061 (all parts), Lamp caps and holders together with gauges for the control of
interchangeability and safety (available at http://std.iec.ch/iec60061)
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 60068-2-75:2014, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60112:2003, Method for the determination of the proof and the comparative tracking
indices of solid insulating materials
IEC 60112:2003/AMD1:2009
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V
– 8 – IEC 61184:2017 IEC 2017
IEC 60245 (all parts), Rubber insulated cables – Rated voltages up to and including
450/750 V
IEC 60399, Barrel thread for lampholders with shade holder ring
IEC 60417, Graphical symbols for use on equipment (available at http://www.graphical-
symbols.info/equipment)
IEC 60432 (all parts), Incandescent lamps – Safety specifications
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60529:1989/AMD1:1999
IEC 60529:1989/AMD2:2013
IEC 60598-1, Luminaires – Part 1: General requirements and tests
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60695-2-11:2014, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products (GWEPT)
IEC 60695-11-5, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method –
Apparatus, confirmatory test arrangement and guidance
ISO 4046-4:2016, Paper, board, pulps and related terms – Vocabulary – Part 4: Paper and
board grades and converted products
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Materials
3.1.1
plastic lampholder
lampholder, the exterior of which is made wholly of plastic material
Note 1 to entry: The exterior is any part of the lampholder which, when wired and fully assembled and fitted with
the testing device shown in Figure 7, can be touched directly by the standard test finger of IEC 60529:1989 and
IEC 60529:1989/AMD1:1999.
3.1.2
ceramic lampholder
lampholder, the exterior of which is made wholly of ceramic material
Note 1 to entry: See note in 3.1.1.
3.1.3
metal lampholder
lampholder, the exterior of which is made wholly or partly of metal
Note 1 to entry: See note in 3.1.1.
3.2 Means of fixing
3.2.1
cord grip lampholder
lampholder incorporating a method of retaining a flexible cord by which it may be suspended
SEE: Figure 4a).
3.2.2
threaded entry lampholder
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
Note 1 to entry: A threaded entry lampholder was formerly called “nipple lampholder”.
SEE: Figure 4b).
3.2.3
backplate lampholder
lampholder so designed as to be suitable for mounting, by means of an associated or integral
backplate, directly on to a supporting surface or appropriate box
SEE: Figure 4c).
3.3
terminal/contact assembly
part or assembly of parts which provides a means of connection between the termination of a
supply conductor and the contact-making surfaces of the corresponding lamp cap as well as
resilient means to maintain contact pressure
Note 1 to entry: A rising type is where the terminal is allowed to rise parallel with the lamp axis on insertion of a
lamp cap.
Note 2 to entry: A non-rising type is where the terminal is not allowed to rise on insertion of a lamp cap;
Note 3 to entry: The terminal and the barrel can be a unique element.
SEE: Figure 4.
3.4
union ring
cylindrical component which joins together separate external parts of the lampholder
SEE: Figure 4.
3.5
shade ring
cylindrical component having an internal thread or other means to engage a corresponding
support on the outer shell and intended to carry or retain a shade
SEE: Figure 4.
3.6
skirt
component similar to a shade ring but having a longer cylindrical form to extend to the full
length of the lampholder body
Note 1 to entry: Applicable to plastic lampholders only.
SEE: Figure 4.
– 10 – IEC 61184:2017 IEC 2017
3.6.1
protective shield
component similar to a skirt but having a flared open end to protect the user from accidental
contact with the lamp cap
Note 1 to entry: Applicable to plastic lampholders only.
SEE: Figure 9.
3.7
dome
part of a cord grip lampholder or threaded entry lampholder which shields the connecting
terminals
SEE: Figure 4.
3.8
barrel
part of a lampholder which serves for mechanical connection of the lamp cap with the
lampholder
SEE: Figure 4.
3.9
lampholder for building-in
lampholder designed to be built into a luminaire, an additional enclosure or the like
3.9.1
unenclosed lampholder
lampholder for building-in so designed that it requires additional means, for example
enclosures, to meet the requirements of IEC 61184 with regard to protection against electric
shock
3.9.2
enclosed lampholder
lampholder for building-in so designed that, on its own, it fulfils the requirements of IEC 61184
with regard to protection against electric shock and, if appropriate, IP classification
3.10
independent lampholder
lampholder so designed that it can be mounted separately from a luminaire and at the same
time provide all the necessary protection according to its classification and marking
3.11
switched lampholder
lampholder provided with an integral switch to control the supply to the lamp
3.12
basic insulation
insulation applied to live parts to provide basic protection against electric shock
Note 1 to entry: Basic insulation does not necessarily include insulation used exclusively for functional purposes.
3.13
supplementary insulation
independent insulation applied in addition to basic insulation in order to provide protection
against electric shock in the event of a failure of basic insulation
3.14
double insulation
insulation comprising both basic insulation and supplementary insulation
3.15
reinforced insulation
single insulation system applied to live parts which provides a degree of protection against
electric shock equivalent to double insulation under the conditions specified
Note 1 to entry: The term "insulation system" does not imply that the insulation is one homogeneous piece. It may
comprise several layers which cannot be tested singly as supplementary or basic insulation.
3.16
live part
conductive part which may cause an electric shock in normal use
Note 1 to entry: The neutral conductor is, however, regarded as a live part.
Note 2 to entry: The test to determine whether or not a conductive part is a live part which may cause an electric
shock is given in Annex A of IEC 60598-1.
3.17
type test
test or series of tests made on a type test specimen for the purpose of checking compliance
of the design of a given product with the requirements of the relevant standard
3.18
type test sample
sample consisting of one or more similar specimens submitted by the manufacturer or
responsible vendor for the purpose of a type test
3.19
semi-luminaire
unit similar to a self-ballasted lamp but designed to utilize a replaceable light source and/or
starting device
3.20
rated operating temperature
highest temperature for which the lampholder is designed
3.21
rated ignition voltage
highest peak of an ignition pulse voltage that the holder is able to withstand
3.22
impulse withstand category
numeral defining a transient overvoltage condition
Note 1 to entry: Impulse withstand categories I, II, III and IV are used.
a) Purpose of classification of impulse withstand categories
Impulse withstand categories are to distinguish different degrees of availability of equipment with regard to
required expectations on continuity of service and on an acceptable risk of failure.
By selection of impulse withstand levels of equipment, insulation co-ordination can be achieved in the whole
installation reducing the risk of failure to an acceptable level providing a basis for overvoltage control.
A higher characteristic numeral of an impulse withstand category indicates a higher specific impulse withstand
of the equipment and offers a wider choice of methods for overvoltage control.
The concept of impulse withstand categories is used for equipment energized directly from the mains.
b) Description of impulse withstand categories
– 12 – IEC 61184:2017 IEC 2017
Equipment of impulse withstand category I is equipment which is intended to be connected to the fixed
electrical installations of buildings. Protective means are taken outside the equipment − either in the fixed
installation or between the fixed installation and the equipment − to limit transient overvoltages to the specific
level.
Equipment of impulse withstand category II is equipment to be connected to the fixed electrical installations of
buildings.
Equipment of impulse withstand category III is equipment which is part of the fixed electrical installations and
other equipment where a higher degree of availability is expected.
Equipment of impulse withstand category IV is for use at or in the proximity of the origin of the electrical
installations of buildings upstream of the main distribution board.
3.23
primary circuit
circuit which is directly connected to the AC mains supply
Note 1 to entry: It includes, for example, the means for connection to the AC mains supply, the primary windings
of transformers, motors and other loading devices.
3.24
secondary circuit
circuit which has no direct connection to a primary circuit and derives its power from a
transformer, converter or equivalent isolation device, or from a battery
Note 1 to entry: Exception: autotransformers. Although having direct connection to a primary circuit, the tapped
part of them is also deemed to be a secondary circuit in the above sense.
Note 2 to entry: Mains transients in such a circuit are attenuated by the corresponding primary windings. Also
inductive ballasts reduce the mains transient voltage height. Therefore, components located after a primary circuit
or after an inductive ballast can be suited for an impulse withstand category of one step lower, i.e. for impulse
withstand category II.
3.25
enclosed reinforced insulated lampholder
lampholder for building-in, so designed that on its own it fulfils the requirements for double or
reinforced insulated parts in class II applications
3.26
partly reinforced insulated lampholder
lampholder for building-in, so designed that some parts of the lampholder require additional
means to fulfil the requirements with regard to double or reinforced insulation
Note 1 to entry: In some cases, the dimensions might be achieved only after mounting into the luminaire.
3.27
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]
3.28
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]
3.29
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]
3.30
ignition voltage
peak voltage applied to ignite a discharge lamp
[SOURCE: IEC 61347-1:2015, 3.46]
3.30.1
ignition pulse voltage
peak ignition voltage with a total duration of ≤ 750 µs (summation of all pulse 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]
4 General requirements
Lampholders shall be so designed and constructed that in normal use they function reliably
and cause no danger to persons or surroundings.
In general, compliance is checked by carrying out all the relevant tests specified.
Independent lampholders, not specifically intended for building-in, shall comply with the
requirements of the following sections and subclauses of IEC 60598-1 where the subject-
matter of these headings is not dealt with in the present document.
Section 2 – Classification
Section 3 – Marking
Section 4 – Construction (as appropriate)
Section 8 – Protection against electric shock
Section 9 – Resistance to dust, solid objects and moisture
Section 10 – Insulation resistance and electric strength (for class II)
Subclauses 12.4 and 12.5 – Thermal tests
5 General conditions for tests
5.1 Tests according to this document are type tests.
NOTE The requirements and tolerances given in this document are related to testing of a type test sample
submitted for that purpose. Compliance of the type test sample does not ensure compliance of the whole
production of a manufacturer with this safety standard. In addition to type testing, conformity of production is the
responsibility of the manufacturer and can include routine tests and quality control.
For further information see IEC 60061-4, sheet 7007-13.
5.2 Unless otherwise specified, the samples are tested as delivered and installed as in
normal use without lamps, at an ambient temperature of 20 °C ± 5 °C.
5.3 All inspections and tests are carried out on a total of:
– 8 specimens for unswitched lampholders, or
– 14 – IEC 61184:2017 IEC 2017
– 11 specimens for switched lampholders;
in the order of the clauses as follows:
– 3 specimens: Clauses 4 to 13;
– 3 specimens: Clauses 15 to 19;
– 3 specimens: Clause 14 (switched lampholder tests only);
– 2 specimens: Clauses 20 and 21.
For testing of screwless terminals according to 11.2, separate additional specimens are
required.
This is also necessary for independent lampholders not specifically intended for building-in
(see Clause 4).
5.4 If no lampholder fails in the complete series of tests specified in 5.3, then lampholders
of that type shall be deemed to comply with this document.
If one lampholder fails in any group in the complete series of tests specified in 5.3, the
lampholders of that type shall be deemed to have failed to comply with this document, unless
that lampholder can be shown to be not representative of normal production or design, in
which case a further set of lampholders shall be submitted to the test or tests in that group.
Generally, it will be necessary to only repeat the test in which failure occurs. However, if the
lampholder fails in the test specified in Clauses 15 to 19 inclusive, the tests shall be repeated
from the tests of Clause 15 onwards.
An additional type test sample may be submitted, together with the first type test sample, in
case one lampholder fails, in which case the additional type test sample shall then be tested
and shall only be rejected if a further failure occurs. If there is no failure in this retest, then
lampholders of that type shall be deemed to comply with this document. If the additional type
test sample is not submitted at the same time, a failure of one lampholder shall entail a
rejection.
If more than one specimen fails in the complete series of tests specified in 5.3 then
lampholders of that type shall be deemed to have failed to comply with this document.
NOTE In view of the duration of the test procedure, lampholders differing only in detail and having the same
constructional principles and materials can be covered by a single series of type tests, subject to agreement
between applicant and test house.
6 Standard ratings
6.1 Standard rated voltage
For all lampholders only a rated voltage of 250 V is allowed.
Lampholders B15d are not intended for use in circuits with ignitors.
Lampholders B22d shall not be used in circuits with ignitors without approval from the
lampholder manufacturer.
NOTE From a theoretical point of view, the minimum creepage distance required for a holder B22d will result in a
clearance sufficient to withstand an ignition voltage of 2,5 kV.
The measures required to allow easy contact travel and lamp removal might in some situations, however, be
accompanied by unforeseen reduction of the clearance without influence on normal operation (without ignition)
where only the creepage distances are critical.
BY22d lampholders are specially designed for use in ignitor circuits.
6.2 Standard rated currents
Standard rated currents are:
– 2 A for lampholders B15d;
– 2 A for lampholders B22d.
The rated current shall be not less than the standard value. Rated currents higher than 2 A
are allowed.
Compliance with the requirements of 6.1 and 6.2 is checked by inspection of the marking.
7 Classification
Lampholders are classified:
7.1 According to the material of the exterior:
– lampholders whose exterior is made wholly of plastic material;
– lampholders whose exterior is made wholly of ceramic material;
– lampholders whose exterior is made wholly or partly of metal.
NOTE For the definition of "exterior", see the note in 3.1.1.
Lampholders with external parts consisting partly of metal and lampholders comprising
external parts of insulating material with a conductive outer surface, for example a metallized
outer shell, are considered as metal lampholders.
This does not apply to threaded entries and external parts, as for example a metal shade ring
mounted on to the outside of a lampholder of insulating material, which cannot become live
even in the case of an insulation fault. Metal lampholders with insulating coverings are
considered as metal lampholders.
If in doubt as to whether or not a surface is conductive, two stripe-electrodes 1,5 mm wide,
25 mm long and with a distance of 2 mm from each other are applied to the surface (e.g. with
silver conductive paint). In accordance with 15.3, the insulating resistance is measured
between the stripes. The surface is considered to be conductive if the resistance is less than
5 MΩ.
7.2 According to degree of protection against solid objects and ingress of water:
– ordinary lampholders;
– drip-proof lampholders.
NOTE A classification for higher degrees of protection against ingress of water is under consideration.
7.3 According to method of fixing:
– threaded entry lampholders;
– cord grip lampholders;
– backplate lampholders;
– other lampholders.
NOTE Examples of other lampholders are lampholders provided with a mechanical suspension device, for
example a hook.
– 16 – IEC 61184:2017 IEC 2017
7.4 According to type:
– switched lampholders provided with an integral switch to control the supply to the lamp;
– non-switched lampholders.
7.5 According to protection against electric shock:
– unenclosed lampholders;
– enclosed lampholders;
– independent lampholders;
– partly reinforced insulated lampholders;
– enclosed reinforced insulated lampholders.
Where a lampholder is used with a working voltage of 50 % or less of its maximum rating, it
may be regarded as equivalent to a reinforced insulated lampholder. Lampholders having a
metal barrel are not classified as reinforced insulated.
7.6 According to resistance to heat:
– without T marking, suitable for rated operating temperatures up to and including 135 °C for
B15d lampholders and 165 °C for B22d lampholders;
– –with Txxx marking, suitable for rated operating temperatures up to and including the
temperature marked or declared by the manufacturer. These temperatures shall be not
lower than 140 °C for B15d lampholders and not lower than 170 °C for B22d lampholders;
The value of the temperature marking is increased by steps of 10 °C.
– with T1 marking, suitable for temperatures on the lamp cap up to and including 165 °C;
NOTE The continued use of T1 lampholders is subject to review.
– with T2 marking, suitable for temperatures on the lamp cap up to and including 210 °C.
8 Marking
8.1 Lampholders shall be marked with:
– rated voltage, in volts;
– rated operating temperature Txxx, T1 or T2, if applicable (see 6.6).
In the first version, the letter T shall be followed by the value of the rated operating
temperature in degrees Celsius;
– symbol for nature of supply, if required (for switched lampholders only);
– for lampholders whose exterior is made wholly of ceramic material, information on the
rated operating temperature, if applicable, shall either be marked on the lampholder or
given in the manufacturer's catalogue;
– mark of origin (this may take the form of a trade mark, or the manufacturer's or
responsible vendor's name or identification mark);
NOTE The mark of origin is not intended to mean the country of origin.
– either a unique catalogue number or an identifying reference;
Available technical documentation of the manufacturer such as printed catalogues or
online catalogues should allow a clear identification of a lampholder either by a unique
catalogue number or by a
...
IEC 61184 ®
Edition 4.1 2019-12
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
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Bayonet lampholders
Douilles à baïonnette
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IEC 61184 ®
Edition 4.1 2019-12
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Bayonet lampholders
Douilles à baïonnette
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.140.10 ISBN 978-2-8322-7731-7
IEC 61184 ®
Edition 4.1 2019-12
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Bayonet lampholders
Douilles à baïonnette
– 2 – IEC 61184:2017+AMD1:2019 CSV
IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
INTRODUCTION to Amendment 1 . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
3.1 Materials . 8
3.2 Means of fixing . 9
4 General requirements . 13
5 General conditions for tests . 13
6 Standard ratings . 14
6.1 Standard rated voltage . 14
6.2 Standard rated currents . 15
7 Classification . 15
8 Marking . 16
9 Dimensions. 18
10 Protection against electric shock . 19
11 Terminals . 20
12 Provision for earthing . 22
13 Construction . 24
14 Switched lampholders . 28
15 Moisture resistance, insulation resistance and electrical strength . 29
16 Mechanical strength . 31
17 Screws, current-carrying parts and connections . 34
18 Creepage distances and clearances . 35
19 General resistance to heat . 37
20 Resistance to heat, fire and tracking . 41
21 Resistance to excessive residual stresses (season cracking) and to rusting . 43
Annex A (normative) Season cracking/corrosion test . 61
A.1 General . 61
A.2 Test cabinet . 61
A.3 Test solution . 61
A.4 Test procedure . 62
Annex B (informative) Schedule of amended clauses and subclauses containing more
serious/critical requirements which require products to be retested . 63
Bibliography . 64
Figure 1 – Loading device (see 16.1) . 44
Figure 2 – Bending apparatus (see 16.4) . 45
Figure 3 – Gauge for holes for backplate lampholders screws (see 13.11) . 46
Figure 4 – Clarification of some of the definitions in Clause 3 . 47
Figure 5 – Test cap B15d (see 19.3) . 48
IEC 2019
Figure 6 – Test cap B22d (see 19.3) . 49
Figure 7 – Testing device (see 10.1) . 50
Figure 8 – Dimensions for shade support devices (see 9.1) . 51
Figure 9 – Dimensions for protective shields for B22d lampholders (see 10.1) . 52
Figure 10 – Test cap B15d (see 15.3) . 53
Figure 11 – Test cap B22d (see 15.3) . 54
Figure 12 – Typical apparatus for the heating test (see 19.5) . 56
Figure 13 – Nipple thread for lampholders – Basic profile and design profile for the nut
and for the screw . 56
Figure 14 – Gauges for metric thread for nipples . 57
Figure 15 – Impact-test apparatus . 58
Figure 16 – Mounting support . 59
Figure 17 – Ball-pressure test apparatus. 59
Figure 18 – Pressure apparatus . 60
Table 1 – Dimensions of threaded entries and set screws . 19
Table 2 – Minimum dimensions of pillar type terminals . 21
Table 3 – Limits for contact forces . 24
Table 4 – Pull and torque values . 27
Table 5 – Heights of fall . 33
Table 6 – Maximum deformation values . 34
Table 7 – Torque values . 35
Table 8 – Minimum distances for AC (50/60 Hz) sinusoidal voltages – Impulse
withstand category II . 36
Table 9 – Heating cabinet temperature . 37
Table 10 – Heating cabinet temperature . 38
Table 11 – Test temperature and test lamp data . 40
Table A.1 – pH adjustment . 61
– 4 – IEC 61184:2017+AMD1:2019 CSV
IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
BAYONET 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.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 61184 edition 4.1 contains the fourth edition (2017-05) [documents 34B/1898/FDIS
and 34B/1905/RVD] and its amendment 1 (2019-12) [documents 34B/2030/CDV and
34B/2041A/RVC].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions are in green text, deletions are in strikethrough
red text. A separate Final version with all changes accepted is available in this
publication.
IEC 2019
International Standard IEC 61184 has been prepared by subcommittee 34B: Lamp caps and
holders, of IEC technical committee 34: Lamps and related equipment.
This fourth edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Restructuring of the standard in accordance with IEC Directives Part 2.
b) Clause 18: Update on creepage distances and clearances;
c) Addition of Annex B.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
In this standard, the following print types are used:
– requirements proper: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
The committee has decided that the contents of the base publication and its amendment 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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
– 6 – IEC 61184:2017+AMD1:2019 CSV
IEC 2019
INTRODUCTION
This document covers safety requirements for bayonet lampholders and includes references
to IEC 60061 (all parts) for the control of interchangeability and safety of the cap and holder
fit.
NOTE Safety requirements ensure that electrical equipment constructed in accordance with these requirements
does not endanger the safety of persons, domestic animals or property when properly installed and maintained and
used in applications for which it was intended.
The thermal characteristics of lampholders are specified by the rated operating temperature
(symbol T), which is the highest temperature for which the lampholder is designed. The
temperature rating and the resistance to heat specified in this document are based on two
different principles, as presently found in IEC 60238 for Edison screw lampholders and in
other national standards for bayonet lampholders. After experience, it may be possible to
rationalize the systems in future editions of this document.
INTRODUCTION to Amendment 1
Some changes and corrections needed for IEC 61184 became obvious during the work on the
fourth edition of IEC 61184.
Change 1:
Actual lamp holder safety standards require a ball pressure test in line with IEC 60695-10-2 in
sections "Resistance to heat, fire and tracking". Within this test there is an alternative depth
indentation method described for the calculation of the indentation diameter.
This alternative calculation option was removed from the latest edition of IEC 60695-10-2
dated 2014 and during its meeting held in Sydney in 2018, SC 34B/WG1 agreed to delete the
alternative method as well from IEC 61184.
Change 2:
Based on IEC 60664-1:2007, 4.8.1.5 "Non tracking materials":
"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."
This is not completely reflected in TC 34 standards as revised recently. For applications with
ELV it is of high importance whether the creepage distance shall be 0,6 mm or may be
0,2 mm in the case where inorganic insulating material is used.
IEC 2019
BAYONET LAMPHOLDERS
1 Scope
This document applies to bayonet lampholders B15d and B22d for connection of lamps and
semi-luminaires to a supply voltage of 250 V.
This document also covers lampholders which are 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, 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. Lampholders for use by luminaire manufacturers only are not for retail sale.
Where lampholders are used in luminaires, their maximum operating temperatures are
specified in IEC 60598-1.
B15d denotes the cap/holder fit as defined by IEC 60061-1, sheet 7004-11 and IEC 60061-2,
sheet 7005-16 with the corresponding gauges.
B22d denotes the cap/holder fit as defined by IEC 60061-1, sheet 7004-10 and IEC 60061-2,
sheet 7005-10 with the corresponding gauges.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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.
IEC 60061 (all parts), Lamp caps and holders together with gauges for the control of
interchangeability and safety (available at http://std.iec.ch/iec60061)
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 60068-2-75:2014, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60112:2003, Method for the determination of the proof and the comparative tracking
indices of solid insulating materials
IEC 60112:2003/AMD1:2009
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V
– 8 – IEC 61184:2017+AMD1:2019 CSV
IEC 2019
IEC 60245 (all parts), Rubber insulated cables – Rated voltages up to and including
450/750 V
IEC 60399, Barrel thread for lampholders with shade holder ring
IEC 60417, Graphical symbols for use on equipment (available at http://www.graphical-
symbols.info/equipment)
IEC 60432 (all parts), Incandescent lamps – Safety specifications
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60529:1989/AMD1:1999
IEC 60529:1989/AMD2:2013
IEC 60598-1, Luminaires – Part 1: General requirements and tests
IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60695-2-11:2014, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products (GWEPT)
IEC 60695-11-5, Fire hazard testing – Part 11-5: Test flames – Needle-flame test method –
Apparatus, confirmatory test arrangement and guidance
ISO 4046-4:2016, Paper, board, pulps and related terms – Vocabulary – Part 4: Paper and
board grades and converted products
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Materials
3.1.1
plastic lampholder
lampholder, the exterior of which is made wholly of plastic material
Note 1 to entry: The exterior is any part of the lampholder which, when wired and fully assembled and fitted with
the testing device shown in Figure 7, can be touched directly by the standard test finger of IEC 60529:1989 and
IEC 60529:1989/AMD1:1999.
3.1.2
ceramic lampholder
lampholder, the exterior of which is made wholly of ceramic material
Note 1 to entry: See note in 3.1.1.
3.1.3
metal lampholder
lampholder, the exterior of which is made wholly or partly of metal
IEC 2019
Note 1 to entry: See note in 3.1.1.
3.2 Means of fixing
3.2.1
cord grip lampholder
lampholder incorporating a method of retaining a flexible cord by which it may be suspended
SEE: Figure 4a).
3.2.2
threaded entry lampholder
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
Note 1 to entry: A threaded entry lampholder was formerly called “nipple lampholder”.
SEE: Figure 4b).
3.2.3
backplate lampholder
lampholder so designed as to be suitable for mounting, by means of an associated or integral
backplate, directly on to a supporting surface or appropriate box
SEE: Figure 4c).
3.3
terminal/contact assembly
part or assembly of parts which provides a means of connection between the termination of a
supply conductor and the contact-making surfaces of the corresponding lamp cap as well as
resilient means to maintain contact pressure
Note 1 to entry: A rising type is where the terminal is allowed to rise parallel with the lamp axis on insertion of a
lamp cap.
Note 2 to entry: A non-rising type is where the terminal is not allowed to rise on insertion of a lamp cap;
Note 3 to entry: The terminal and the barrel can be a unique element.
SEE: Figure 4.
3.4
union ring
cylindrical component which joins together separate external parts of the lampholder
SEE: Figure 4.
3.5
shade ring
cylindrical component having an internal thread or other means to engage a corresponding
support on the outer shell and intended to carry or retain a shade
SEE: Figure 4.
3.6
skirt
component similar to a shade ring but having a longer cylindrical form to extend to the full
length of the lampholder body
Note 1 to entry: Applicable to plastic lampholders only.
SEE: Figure 4.
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IEC 2019
3.6.1
protective shield
component similar to a skirt but having a flared open end to protect the user from accidental
contact with the lamp cap
Note 1 to entry: Applicable to plastic lampholders only.
SEE: Figure 9.
3.7
dome
part of a cord grip lampholder or threaded entry lampholder which shields the connecting
terminals
SEE: Figure 4.
3.8
barrel
part of a lampholder which serves for mechanical connection of the lamp cap with the
lampholder
SEE: Figure 4.
3.9
lampholder for building-in
lampholder designed to be built into a luminaire, an additional enclosure or the like
3.9.1
unenclosed lampholder
lampholder for building-in so designed that it requires additional means, for example
enclosures, to meet the requirements of IEC 61184 with regard to protection against electric
shock
3.9.2
enclosed lampholder
lampholder for building-in so designed that, on its own, it fulfils the requirements of IEC 61184
with regard to protection against electric shock and, if appropriate, IP classification
3.10
independent lampholder
lampholder so designed that it can be mounted separately from a luminaire and at the same
time provide all the necessary protection according to its classification and marking
3.11
switched lampholder
lampholder provided with an integral switch to control the supply to the lamp
3.12
basic insulation
insulation applied to live parts to provide basic protection against electric shock
Note 1 to entry: Basic insulation does not necessarily include insulation used exclusively for functional purposes.
3.13
supplementary insulation
independent insulation applied in addition to basic insulation in order to provide protection
against electric shock in the event of a failure of basic insulation
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3.14
double insulation
insulation comprising both basic insulation and supplementary insulation
3.15
reinforced insulation
single insulation system applied to live parts which provides a degree of protection against
electric shock equivalent to double insulation under the conditions specified
Note 1 to entry: The term "insulation system" does not imply that the insulation is one homogeneous piece. It may
comprise several layers which cannot be tested singly as supplementary or basic insulation.
3.16
live part
conductive part which may cause an electric shock in normal use
Note 1 to entry: The neutral conductor is, however, regarded as a live part.
Note 2 to entry: The test to determine whether or not a conductive part is a live part which may cause an electric
shock is given in Annex A of IEC 60598-1.
3.17
type test
test or series of tests made on a type test specimen for the purpose of checking compliance
of the design of a given product with the requirements of the relevant standard
3.18
type test sample
sample consisting of one or more similar specimens submitted by the manufacturer or
responsible vendor for the purpose of a type test
3.19
semi-luminaire
unit similar to a self-ballasted lamp but designed to utilize a replaceable light source and/or
starting device
3.20
rated operating temperature
highest temperature for which the lampholder is designed
3.21
rated ignition voltage
highest peak of an ignition pulse voltage that the holder is able to withstand
3.22
impulse withstand category
numeral defining a transient overvoltage condition
Note 1 to entry: Impulse withstand categories I, II, III and IV are used.
a) Purpose of classification of impulse withstand categories
Impulse withstand categories are to distinguish different degrees of availability of equipment with regard to
required expectations on continuity of service and on an acceptable risk of failure.
By selection of impulse withstand levels of equipment, insulation co-ordination can be achieved in the whole
installation reducing the risk of failure to an acceptable level providing a basis for overvoltage control.
A higher characteristic numeral of an impulse withstand category indicates a higher specific impulse withstand
of the equipment and offers a wider choice of methods for overvoltage control.
The concept of impulse withstand categories is used for equipment energized directly from the mains.
b) Description of impulse withstand categories
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IEC 2019
Equipment of impulse withstand category I is equipment which is intended to be connected to the fixed
electrical installations of buildings. Protective means are taken outside the equipment − either in the fixed
installation or between the fixed installation and the equipment − to limit transient overvoltages to the specific
level.
Equipment of impulse withstand category II is equipment to be connected to the fixed electrical installations of
buildings.
Equipment of impulse withstand category III is equipment which is part of the fixed electrical installations and
other equipment where a higher degree of availability is expected.
Equipment of impulse withstand category IV is for use at or in the proximity of the origin of the electrical
installations of buildings upstream of the main distribution board.
3.23
primary circuit
circuit which is directly connected to the AC mains supply
Note 1 to entry: It includes, for example, the means for connection to the AC mains supply, the primary windings
of transformers, motors and other loading devices.
3.24
secondary circuit
circuit which has no direct connection to a primary circuit and derives its power from a
transformer, converter or equivalent isolation device, or from a battery
Note 1 to entry: Exception: autotransformers. Although having direct connection to a primary circuit, the tapped
part of them is also deemed to be a secondary circuit in the above sense.
Note 2 to entry: Mains transients in such a circuit are attenuated by the corresponding primary windings. Also
inductive ballasts reduce the mains transient voltage height. Therefore, components located after a primary circuit
or after an inductive ballast can be suited for an impulse withstand category of one step lower, i.e. for impulse
withstand category II.
3.25
enclosed reinforced insulated lampholder
lampholder for building-in, so designed that on its own it fulfils the requirements for double or
reinforced insulated parts in class II applications
3.26
partly reinforced insulated lampholder
lampholder for building-in, so designed that some parts of the lampholder require additional
means to fulfil the requirements with regard to double or reinforced insulation
Note 1 to entry: In some cases, the dimensions might be achieved only after mounting into the luminaire.
3.27
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]
3.28
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]
3.29
rated current
current declared by the manufacturer to indicate the highest current for which the lampholder
is intended
IEC 2019
[SOURCE: IEC 60838-1:2016, 3.3]
3.30
ignition voltage
peak voltage applied to ignite a discharge lamp
[SOURCE: IEC 61347-1:2015, 3.46]
3.30.1
ignition pulse voltage
peak ignition voltage with a total duration of ≤ 750 µs (summation of all pulse 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]
4 General requirements
Lampholders shall be so designed and constructed that in normal use they function reliably
and cause no danger to persons or surroundings.
In general, compliance is checked by carrying out all the relevant tests specified.
Independent lampholders, not specifically intended for building-in, shall comply with the
requirements of the following sections and subclauses of IEC 60598-1 where the subject-
matter of these headings is not dealt with in the present document.
Section 2 – Classification
Section 3 – Marking
Section 4 – Construction (as appropriate)
Section 8 – Protection against electric shock
Section 9 – Resistance to dust, solid objects and moisture
Section 10 – Insulation resistance and electric strength (for class II)
Subclauses 12.4 and 12.5 – Thermal tests
5 General conditions for tests
5.1 Tests according to this document are type tests.
NOTE The requirements and tolerances given in this document are related to testing of a type test sample
submitted for that purpose. Compliance of the type test sample does not ensure compliance of the whole
production of a manufacturer with this safety standard. In addition to type testing, conformity of production is the
responsibility of the manufacturer and can include routine tests and quality control.
For further information see IEC 60061-4, sheet 7007-13.
5.2 Unless otherwise specified, the samples are tested as delivered and installed as in
normal use without lamps, at an ambient temperature of 20 °C ± 5 °C.
5.3 All inspections and tests are carried out on a total of:
– 8 specimens for unswitched lampholders, or
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– 11 specimens for switched lampholders;
in the order of the clauses as follows:
– 3 specimens: Clauses 4 to 13;
– 3 specimens: Clauses 15 to 19;
– 3 specimens: Clause 14 (switched lampholder tests only);
– 2 specimens: Clauses 20 and 21.
For testing of screwless terminals according to 11.2, separate additional specimens are
required.
This is also necessary for independent lampholders not specifically intended for building-in
(see Clause 4).
5.4 If no lampholder fails in the complete series of tests specified in 5.3, then lampholders
of that type shall be deemed to comply with this document.
If one lampholder fails in any group in the complete series of tests specified in 5.3, the
lampholders of that type shall be deemed to have failed to comply with this document, unless
that lampholder can be shown to be not representative of normal production or design, in
which case a further set of lampholders shall be submitted to the test or tests in that group.
Generally, it will be necessary to only repeat the test in which failure occurs. However, if the
lampholder fails in the test specified in Clauses 15 to 19 inclusive, the tests shall be repeated
from the tests of Clause 15 onwards.
An additional type test sample may be submitted, together with the first type test sample, in
case one lampholder fails, in which case the additional type test sample shall then be tested
and shall only be rejected if a further failure occurs. If there is no failure in this retest, then
lampholders of that type shall be deemed to comply with this document. If the additional type
test sample is not submitted at the same time, a failure of one lampholder shall entail a
rejection.
If more than one specimen fails in the complete series of tests specified in 5.3 then
lampholders of that type shall be deemed to have failed to comply with this document.
NOTE In view of the duration of the test procedure, lampholders differing only in detail and having the same
constructional principles and materials can be covered by a single series of type tests, subject to agreement
between applicant and test house.
6 Standard ratings
6.1 Standard rated voltage
For all lampholders only a rated voltage of 250 V is allowed.
Lampholders B15d are not intended for use in circuits with ignitors.
Lampholders B22d shall not be used in circuits with ignitors without approval from the
lampholder manufacturer.
NOTE From a theoretical point of view, the minimum creepage distance required for a holder B22d will result in a
clearance sufficient to withstand an ignition voltage of 2,5 kV.
The measures required to allow easy contact travel and lamp removal might in some situations, however, be
accompanied by unforeseen reduction of the clearance without influence on normal operation (without ignition)
where only the creepage distances are critical.
BY22d lampholders are specially designed for use in ignitor circuits.
IEC 2019
6.2 Standard rated currents
Standard rated currents are:
– 2 A for lampholders B15d;
– 2 A for lampholders B22d.
The rated current shall be not less than the standard value. Rated currents higher than 2 A
are allowed.
Compliance with the requirements of 6.1 and 6.2 is checked by inspection of the marking.
7 Classification
Lampholders are classified:
7.1 According to the material of the exterior:
– lampholders whose exterior is made wholly of plastic material;
– lampholders whose exterior is made wholly of ceramic material;
– lampholders whose exterior is made wholly or partly of metal.
NOTE For the definition of "exterior", see the note in 3.1.1.
Lampholders with external parts consisting partly of metal and lampholders comprising
external parts of insulating material with a conductive outer surface, for example a metallized
outer shell, are considered as metal lampholders.
This does not apply to threaded entries and external parts, as for example a metal shade ring
mounted on to the outside of a lampholder of insulating material, which cannot become live
even in the case of an insulation fault. Metal lampholders with insulating coverings are
considered as metal lampholders.
If in doubt as to whether or not a surface is conductive, two stripe-electrodes 1,5 mm wide,
25 mm long and with a distance of 2 mm from each other are applied to the surface (e.g. with
silver conductive paint). In accordance with 15.3, the insulating resistance is measured
between the stripes. The surface is considered to be conductive if the resistance is less than
5 MΩ.
7.2 According to degree of protection against solid objects and ingress of water:
– ordinary lampholders;
– drip-proof lampholders.
NOTE A classification for higher degrees of protection against ingress of water is under consideration.
7.3 According to method of fixing:
– threaded entry lampholders;
– cord grip lampholders;
– backplate lampholders;
– other lampholders.
NOTE Examples of other lampholders are lampholders provided with a mechanical suspension device, for
example a hook.
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7.4 According to type:
– switched lampholders provided with an integral switch to control the supply to the lamp;
– non-switched lampholders.
7.5 According to protection against electric shock:
– unenclosed lampholders;
– enclosed lampholders;
– independent lampholders;
– partly reinforced insulated lampholders;
– enclosed reinforced insulated lampholders.
Where a lampholder is used with a working voltage of 50 % or less of its maximum rating, it
may be regarded as equivalent to a reinforced insulated lampholder. Lampholders having a
metal barrel are not classified as reinforced insul
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