SIST EN 60838-1:2005
(Main)Miscellaneous lampholders -- Part 1: General requirements and tests
Miscellaneous lampholders -- Part 1: General requirements and tests
This part of EN 60838 applies to lampholders of miscellaneous types intended for building-in (to be used with general purpose light sources, projection lamps, floodlighting lamps and street-lighting lamps with caps as listed in annex A) and the methods of test to be used in determining the safe use of lamps in lampholders. This part of EN 60838 also covers lampholders which are integral with a luminaire. It covers the requirements for the lampholder only.
Sonderfassungen -- Teil 1: Allgemeine Anforderungen und Prüfungen
Douilles diverses pour lampes -- Partie 1: Prescriptions générales et essais
La présente partie de la EN 60838 s'applique aux douilles de types divers prévues pour être incorporées (et destinées à être utilisées avec les sources lumineuses à usage général, les lampes de projection, les lampes d'illumination et les lampes pour l'éclairage public dotées du culot et répertoriées à titre d'exemple dans l'Annexe A) ainsi qu'aux méthodes d'essai à appliquer pour démontrer la sécurité d'utilisation des lampes dans les douilles. La présente partie de la EN 60838 couvre également les douilles intégrées dans un luminaire. Elle couvre seulement les prescriptions de la douille.
Razni okovi za žarnice in sijalke – 1. del: Splošne zahteve in preskusi (IEC 60838-1:2004)
General Information
Relations
Standards Content (Sample)
SLOVENSKI SIST EN 60838-1:2005
STANDARD
junij 2005
Razni okovi za žarnice in sijalke – 1. del: Splošne zahteve in preskusi (IEC
60838-1:2004)
Miscellaneous lampholders - Part 1: General requirements and tests (IEC 60838-
1:2004)
ICS 29.140.10 Referenčna številka
SIST EN 60838-1:2005(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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EUROPEAN STANDARD EN 60838-1
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2004
ICS 29.140.10 Supersedes EN 60838-1:1998 + A1:1999 + A2:2002
English version
Miscellaneous lampholders
Part 1: General requirements and tests
(IEC 60838-1:2004)
Douilles diverses pour lampes Sonderfassungen
Partie 1: Prescriptions générales et essais Teil 1: Allgemeine Anforderungen
(CEI 60838-1:2004) und Prüfungen
(IEC 60838-1:2004)
This European Standard was approved by CENELEC on 2004-10-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60838-1:2004 E
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EN 60838-1:2004 - 2 -
Foreword
The text of document 34B/1152/FDIS, future edition 4 of IEC 60838-1, prepared by SC 34B, Lamp
caps and holders, of IEC TC 34, Lamps and related equipment, was submitted to the IEC-CENELEC
parallel vote and was approved by CENELEC as EN 60838-1 on 2004-10-01.
This European Standard supersedes EN 60838-1:1998 + A1:1999 + A2:2002 + A2:2002/corrigendum
July 2003.
In this edition of EN 60838-1 the new requirements for creepage distances and clearances have been
adopted which are currently circulated to amend the EN 60598 family of luminaire standards.
It also includes additional requirements regarding testing of lampholders for double-ended R7s/RX7s
lamps.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2005-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2007-10-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60838-1:2004 was approved by CENELEC as a European
Standard without any modification.
__________
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- 3 - EN 60838-1:2004
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE Where an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60061 (mod) Series Lamp caps and holders together with EN 60061 Series
gauges for the control of
interchangeability and safety
1) 2)
IEC 60061-1 - Part 1: Lamp caps EN 60061-1 1993
(mod)
1) 2)
IEC 60061-2 - Part 2: Lampholders EN 60061-2 1993
(mod)
1) 2)
IEC 60061-3 - Part 3: Gauges EN 60061-3 1993
(mod)
3)
IEC 60068-2-20 1979 Basic environmental testing procedures HD 323.2.20 S3 1988
Part 2: Tests - Test T: Soldering
IEC 60068-2-75 1997 Part 2-75: Tests - Test Eh: Hammer tests EN 60068-2-75 1997
4)
IEC 60112 1979 Method for determining the comparative HD 214 S2 1980
and the proof tracking indices of solid
insulating materials under moist
conditions
5)
IEC 60227 Series Polyvinyl chloride insulated cables of - -
rated voltages up to and including
450/750 V
IEC 60238 2004 Edison screw lampholders EN 60238 2004
6)
IEC 60245 Series Rubber insulated cables - Rated voltages - -
up to and including 450/750 V
1)
Undated reference.
2)
Valid edition at date of issue.
3)
HD 323.2.20 S3 includes A2:1987 to IEC 60068-2-20.
4)
HD 214 S2 is superseded by EN 60112:2003, which is based on IEC 60112:2003.
5)
The HD 21 series, which is related to, but not directly equivalent with the IEC 60227 series, applies instead.
6)
The HD 22 series, which is related to, but not directly equivalent with the IEC 60245 series, applies instead.
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EN 60838-1:2004 - 4 -
Publication Year Title EN/HD Year
1) 2)
IEC 60352-1 - Solderless connections EN 60352-1 1997
Part 1: Wrapped connections - General
requirements, test methods and practical
guidance
1) 2)
IEC 60399 - Barrel thread for lampholders with shade EN 60399 2004
holder ring
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code) + corr. May 1993
A1 1999 A1 2000
1) 2)
IEC 60598-1 - Luminaires EN 60598-1 2004
(mod) Part 1: General requirements and tests
IEC 60664-1 1992 Insulation coordination for equipment
within low-voltage systems
Part 1: Principles, requirements and tests
+ A1 2000
+ A2 2002 EN 60664-1 2003
1)
IEC 60695-2-2 - Fire hazard testing EN 60695-2-2 1994
Part 2: Test methods –
Section 2: Needle-flame test
1) 2)
IEC 60695-2-11 - Part 2-11: Glowing/hot-wire based test EN 60695-2-11 2001
methods - Glow-wire flammability test
method for end-products
ISO 1456 2003 Metallic coatings - Electrodeposited - -
coatings of nickel plus chromium and of
copper plus nickel plus chromium
ISO 2081 1986 Metallic coatings - Electroplated coatings - -
of zinc on iron or steel
ISO 2093 1986 Electroplated coatings of tin - - -
Specification and test methods
ISO 4046-4 2002 Paper, board, pulps and related terms - - -
Vocabulary
Part 4: Paper and board grades and
converted products
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NORME CEI
INTERNATIONALE
IEC
60838-1
INTERNATIONAL
Quatrième édition
STANDARD
Fourth edition
2004-10
Douilles diverses pour lampes –
Partie 1:
Prescriptions générales et essais
Miscellaneous lampholders –
Part 1:
General requirements and tests
IEC 2004 Droits de reproduction réservés Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
CODE PRIX
V
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
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60838-1 IEC:2004 – 3 –
CONTENTS
FOREWORD.5
1 General.9
2 Definitions.13
3 General requirement.15
4 General conditions for tests.17
5 Classification.19
6 Marking.19
7 Protection against electric shock .23
8 Terminals.25
9 Provision for earthing.27
10 Construction.29
11 Moisture resistance, insulation resistance and electric strength.31
12 Mechanical strength.33
13 Screws, current-carrying parts and connections.37
14 Creepage distances and clearances .37
15 Endurance.43
16 Resistance to heat and fire.45
17 Resistance to excessive residual stresses (season cracking) and to rusting .51
Annex A (normative) Examples of lampholders covered by this standard .55
Annex B (normative) Examples of suitable metals.57
Annex C (normative) Season cracking/corrosion test .59
Annex D (normative) Pendulum impact test apparatus .63
Figure 1 – Ball-pressure test apparatus .45
Table 1 – Minimum values of insulation resistance.33
Table 2a – Minimum distances for a.c. (50Hz/60 Hz) sinusoidal voltages − Impulse
withstand category II.37
Table 2b – Minimum distances for a.c. (50 Hz/60 Hz) sinusoidal voltages − Impulse
withstand category III.39
Table 3 – Minimum distances for non-sinusoidal pulse voltages.41
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60838-1 IEC:2004 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MISCELLANEOUS LAMPHOLDERS –
Part 1: General requirements and tests
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60838-1 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 1997 and its
amendments 1 (1999) and 2 (2002). This fourth edition constitutes a technical revision.
In this edition the new requirements for creepage distances and clearances have been
adopted which are currently circulated by SC34D to amend the IEC 60598 family of luminaire
standards.
It also includes additional requirements regarding testing of lampholders for double-ended
R7s/RX7s lamps.
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60838-1 IEC:2004 – 7 –
The text of this standard is based on the following documents:
FDIS Report on voting
34B/1152/FDIS 34B/1171/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.
IEC 60838 consists of the following parts, under the general title Miscellaneous lampholders:
Part 1: General requirements and tests
Part 2-1: Particular requirements – Lampholders S14
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
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60838-1 IEC:2004 – 9 –
MISCELLANEOUS LAMPHOLDERS –
Part 1: General requirements and tests
1 General
1.1 Scope
This part of IEC 60838 applies to lampholders of miscellaneous types intended for building-in
(to be used with general purpose light sources, projection lamps, floodlighting lamps and
street-lighting lamps with caps as listed in annex A) and the methods of test to be used in
determining the safe use of lamps in lampholders.
This part of IEC 60838 also covers lampholders which are integral with a luminaire. It covers
the requirements for the lampholder only.
This part of IEC 60838 also covers lampholders integrated in an outer shell and dome similar
to Edison screw lampholders. Such lampholders are further tested in accordance with the
following subclauses of IEC 60238: 8.4; 8.5; 8.6; 9.3; 10.7; 11; 12.2; 12.5; 12.6; 12.7; 13;
15.3; 15.4; 15.5 and 15.9.
Lampholders designed with a barrel thread for shade holder rings should comply with
IEC 60399.
Requirements for lampholders for tubular fluorescent lamps, Edison screw lampholders and
bayonet lampholders are covered by separate standards.
1.2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
NOTE With regard to IEC 60598-1, the references cited in this document are liable to change.
IEC 60061(all parts), Lamp caps and holders together with gauges for the control of
interchangeability and safety
IEC 60061-1: Lamp caps and holders together with gauges for the control of
interchangeability and safety – Part 1: Lamp caps
IEC 60061-2: Lamp caps and holders together with gauges for the control of
interchangeability and safety – Part 2: Lampholders
IEC 60061-3: Lamp caps and holders together with gauges for the control of
interchangeability and safety – Part 3: Gauges
IEC 60068-2-20:1979, Environmental testing – Part 2: Tests – Test T: Soldering
IEC 60068-2-75:1997, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
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60838-1 IEC:2004 – 11 –
IEC 60112:1979, Method for the determination of the proof and the comparative tracking
indices of solid insulating materials
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V
IEC 60238:2004, Edison screw lampholders
IEC 60245 (all parts), Rubber insulated cables – Rated voltages up to and including
450/750 V
IEC 60352-1, Solderless connections – Part 1: Wrapped connections – General requirements,
test methods and practical guidance
IEC 60399: Standard sheets for barrel thread for E14 and E27 lampholders with shade holder
ring
1)
IEC 60529:1989, Degrees of protection provided by enclosures (IP code)
Amendment 1 (1999)
IEC 60598-1: Luminaires – Part 1: General requirements and tests
IEC 60664-1:1992, Insulation co-ordination for equipment within low-voltage systems – Part 1:
2)
Principles, requirements and tests
Amendment 1 (2000)
Amendment 2 (2002)
IEC 60695-2-2, Fire hazard testing – Part 2: Test methods – Section 2: Needle-flame test
IEC 60695-2-11, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end products
ISO 1456:2003, Metallic coatings – Electrodeposited coatings of nickel plus chromium and of
copper plus nickel plus chromium
ISO 2081:1986, Metallic coatings – Electroplated coatings of zinc on iron or steel
ISO 2093:1986, Electroplated coatings of tin – Specification and test methods
ISO 4046-4:2002, Paper, board, pulps and related terms – Vocabulary – Part 4: Paper and
board grades and converted products
___________
1)
A consolidated edition 2.1 (2001) exists that includes edition 2.0 (1989) and its Amendment 1 (1999).
2)
A consolidated edition 1.2 (2002) exists that includes edition 1.0 (1992), its amendment 1 (2000) and
amendment 2 (2002).
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60838-1 IEC:2004 – 13 –
2 Definitions
For the purpose of this International Standard, the following definitions apply.
2.1
rated voltage
the voltage declared by the manufacturer to indicate the highest working voltage for which the
lampholder is intended
2.2
working voltage
the 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
2.3
rated current
the current declared by the manufacturer to indicate the highest current for which the
lampholder is intended
2.4
lampholder for building-in
a lampholder designed to be built into a luminaire, an additional enclosure or the like
2.4.1
unenclosed lampholder
a lampholder for building-in so designed that it requires additional means, for example
enclosures, to meet the requirements of this standard with regard to protection against
electric shock
2.4.2
enclosed lampholder
a lampholder for building-in so designed that it fulfils on its own the requirements of this
standard with regard to protection against electric shock
2.5
rated operating temperature
The highest temperature for which the lampholder is designed
2.6
rated pulse voltage
the highest peak value of pulse voltages the holder is able to withstand
2.7
lamp connectors
a set of contacts specially designed to provide for electrical contact but not supporting the
lamp
2.8
type test
a test or series of tests made on a type test sample, for the purpose of checking compliance
of the design of a given product with the requirements of the relevant standard
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60838-1 IEC:2004 – 15 –
2.9
type test sample
a sample consisting of one or more similar specimens submitted by the manufacturer or
responsible vendor for the purpose of a type test
2.10
live part
a conductive part which may cause an electric shock
2.11
impulse withstand category
a numeral defining a transient overvoltage condition
NOTE 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
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.
2.12
primary circuit
a circuit which is directly connected to the AC mains supply. It includes, for example, the
means for connection to the AC mains supply, the primary windings of transformers, motors
and other loading devices
2.13
secondary circuit
a 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
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 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 General requirement
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 tests specified.
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60838-1 IEC:2004 – 17 –
4 General conditions for tests
4.1 Tests according to this standard are type tests.
NOTE The requirements and tolerances permitted by the standard are related to testing of type test sample
submitted for that purpose. Compliance of type test sample does not ensure compliance of the whole production of
a manufacturer with this safety standard. Conformity of production is the responsibility of the manufacturer and
should include routine tests and quality assurance in addition to type testing.
3)
For further information see IEC 60061-4 (inclusion of guidance on conformity testing during manufacture is in
preparation).
4.2 Unless otherwise specified, the tests are made at an ambient temperature of
20 °C ± 5 °C and with the holder in the most unfavourable position for normal use.
If a lampholder is declared to accept different lamp fits, it shall comply with the requirements
of each of the fits mentioned.
Compliance is checked with separate sets of specimens according to 4.3.
If the use of different lamp fits in turn is permitted by the manufacturer, only one set of
specimens is used to check compliance with all requirements.
For all tests the most critical of the relevant fits and gauges shall be used and in the most
onerous sequence.
4.3 The tests and inspections are carried out in the order of the clauses, on a total of
– 10 pairs of matching holders intended for linear double-capped lamps;
NOTE If a pair of holders consists of identical holders, it is sufficient that one holder instead of one pair is
subjected to all the tests, except for the tests of clause 7, 10.2, 10.3, clause 12, clause 15 and 16.6 where
pairs are needed.
– 10 specimens intended for single-capped lamps;
in the order of the clauses, as follows:
– three pairs or three specimens: clauses 3 up to and including 14 (except for 8.2);
NOTE The tests of 8.2 are carried out on the number of separate specimens as required by the relevant
standards.
– three pairs or three specimens: clause 15 and 16.6;
– one pair or one specimen: 16.1;
– one pair or one specimen: 16.3;
– one pair or one specimen: 16.4;
– one pair or one specimen: 16.5 and clause 17.
Together with these units, the manufacturer's mounting instructions (see 6.3) shall be
supplied.
In such cases, where according to the mounting instructions the rated pulse voltage of the
holder can only be achieved with a cap inserted, suitable caps shall be supplied together with
the type test sample. The relevant tests are then carried out with a cap inserted.
___________
3)
IEC 60061-4: Lamp caps and holders together with gauges for the control of interchangeability and safety –
Part 4: Guidelines and general information
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60838-1 IEC:2004 – 19 –
4.4 Lampholders are deemed to comply with this standard if no specimen fails in the
complete series of tests specified in 4.3.
If one specimen fails in one test, that test and the preceding ones which may have influenced
the result of that test are repeated on another set of specimens for the number required by
4.3, all of which shall then comply with the repeated tests and with the subsequent tests.
Lampholders are deemed not to comply with this standard if there are more failures than one.
The applicant may submit, together with the first set of specimens, the additional set which
may be needed in case of failure of one specimen. The testing station shall then, without
further request, test the additional specimens and will reject only if a further failure occurs.
If the additional set of specimens is not submitted at the same time, a failure of one specimen
will entail
...
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