SIST EN 60664-1:2007
Insulation coordination for equipment within low-voltage systems -- Part 1: Principles, requirements and tests
Insulation coordination for equipment within low-voltage systems -- Part 1: Principles, requirements and tests
This part of IEC 60664 deals with insulation coordination for equipment within low-voltage systems. It applies to equipment for use up to 2 000 m above sea level having a rated voltage up to a.c. 1 000 V with rated frequencies up to 30 kHz, or a rated voltage up to d.c. 1 500 V. It specifies the requirements for clearances, creepage distances and solid insulation for equipment based upon their performance criteria. It includes methods of electric testing with respect to insulation coordination. The minimum clearances specified in this standard do not apply where ionized gases occur. Special requirements for such situations may be specified at the discretion of the relevant technical committee. This standard does not deal with distances - through liquid insulation, - through gases other than air, - through compressed air. The object of this basic safety standard is to guide technical committees responsible for different equipment in order to rationalize their requirements so that insulation coordination is achieved. It provides the information necessary to give guidance to technical committees when specifying clearances in air, creepage distances and solid insulation for equipment. Care should be taken to see that manufacturers and technical committees are responsible for application of the requirements, as specified in this basic safety publication, or make reference to it, where necessary, in standards for equipment within their scope. In the case of missing specified values for clearances, creepage distances and requirements for solid insulation in the relevant product standards, or even missing standards, this standard is applicable.
Isolationskoordination für elektrische Betriebsmittel in Niederspannungsanlagen -- Teil 1: Grundsätze, Anforderungen und Prüfungen
Coordination de l'isolement des matériels dans les systèmes (réseaux) à basse tension -- Partie 1: Principes, exigences et essais
Traite de la coordination de l'isolement des matériels dans les systèmes (réseaux) à basse tension. Elle s'applique au matériel utilisé jusqu'à 2 000 m au-dessus du niveau de la mer, ayant une tension assignée ne dépassant pas 1 000 V en courant alternatif, de fréquences assignées ne dépassant pas 30 kHz, ou une tension assignée ne dépassant pas 1 500 V en courant continu. Définit les exigences pour des distances d'isolement dans l'air, des lignes de fuite et l'isolation solide des matériels, à partir de leurs critères de performance. Elle comprend les méthodes d'essais diélectriques concernant la coordination de l'isolement. Les distances minimales d'isolement dans l'air spécifiées dans la présente norme ne s'appliquent pas en présence de gaz ionisés. Les exigences particulières dans de telles conditions peuvent être spécifiées, comme ils l'entendent, par les comités d'études compétents. Ne traite pas des distances - à travers l'isolation liquide, - à travers les gaz autres que l'air, - à travers l'air comprimé. Les principales modifications suivantes ont été apportées à l'édition antérieure: - Modification des conditions du réseau électrique au Japon en ce qui concerne les tensions assignées de choc, les tensions rationalisées et les tensions nominales des réseaux d'alimentation pour différents modes de contrôle des surtensions - Modification du dimensionnement des distances d'isolement dans l'air inférieures à 0,01 mm - Alignement du tableau et des formules correspondantes concernant les tensions d'essai pour la vérification des distances d'isolement dans l'air à différentes altitudes - Modification de l'interpolation des valeurs de ligne de fuite pour l'isolation fonctionnelle - Modification du dimensionnement des lignes de fuite tenant compte des nervures - Révision de l'ancien Article 4 'Essais et mesures' (désormais Article 6) pour obtenir une description plus détaillée des essais et de leur objet, du matériel d'essai et des alternatives existantes - Transformation de l'Annexe C 'Méthodes d'essai de décharge partielle' d'un ancien rapport technique de type 2 (désigné désormais TS) en une Annexe C normative. A le statut de publication fondamentale de sécurité, conformément au Guide CEI 104.
Uskladitev izolacije za opremo v okviru nizkonapetostnih sistemov - 1. del: Načela, zahteve in preskusi (IEC 60664-1:2007)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 60664-1:2007
01-november-2007
1DGRPHãþD
SIST EN 60664-1:2004
8VNODGLWHYL]RODFLMH]DRSUHPRYRNYLUXQL]NRQDSHWRVWQLKVLVWHPRYGHO 1DþHOD
]DKWHYHLQSUHVNXVL ,(&
Insulation coordination for equipment within low-voltage systems - Part 1: Principles,
requirements and tests
Isolationskoordination für elektrische Betriebsmittel in Niederspannungsanlagen - Teil 1:
Grundsätze, Anforderungen und Prüfungen
Coordination de l'isolement des matériels dans les systemes (réseaux) a basse tension -
Partie 1: Principes, exigences et essais
Ta slovenski standard je istoveten z: EN 60664-1:2007
ICS:
29.080.30 Izolacijski sistemi Insulation systems
SIST EN 60664-1:2007 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 60664-1
NORME EUROPÉENNE
July 2007
EUROPÄISCHE NORM
ICS 29.080.30; 29.080 Supersedes EN 60664-1:2003
English version
Insulation coordination for equipment
within low-voltage systems -
Part 1: Principles, requirements and tests
(IEC 60664-1:2007)
Coordination de l'isolement Isolationskoordination
des matériels dans les systèmes für elektrische Betriebsmittel
(réseaux) à basse tension - in Niederspannungsanlagen -
Partie 1: Principes, exigences Teil 1: Grundsätze, Anforderungen
et essais und Prüfungen
(CEI 60664-1:2007) (IEC 60664-1:2007)
This European Standard was approved by CENELEC on 2007-07-01. 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, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the 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
© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60664-1:2007 E
---------------------- Page: 2 ----------------------
EN 60664-1:2007 - 2 -
Foreword
The text of document 109/58/CDV, future edition 2 of IEC 60664-1, prepared by IEC TC 109, Insulation
co-ordination for low-voltage equipment, was submitted to the IEC-CENELEC parallel Unique Acceptance
Procedure and was approved by CENELEC as EN 60664-1 on 2007-07-01.
This European Standard supersedes EN 60664-1:2003.
In addition to a number of editorial improvements, the following main changes have been made with
respect to EN 60664-1:2003:
− amendment of Japanese mains conditions with regard to the rated impulse voltages, the rationalized
voltages and the nominal voltages of supply systems for different modes of overvoltage control;
− amendment of dimensioning of clearances smaller than 0,01 mm;
− alignment of the table and the corresponding formula regarding test voltages for verifying clearances
at different altitudes;
− amendment of interpolation of the creepage distance values for functional insulation;
− amendment of creepage distance dimensioning taking into account ribs;
− revision of the former Clause 4 "Tests and measurements" (now Clause 6) to achieve a more detailed
description of the tests and their purpose, the test equipment and possible alternatives;
− change of Annex C "Partial discharge test methods" from a former technical report, Type 2 (now called
TS), to a normative Annex C.
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) 2008-04-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-07-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60664-1:2007 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
ISO/IEC Guide 2 NOTE Harmonized as EN 45020:1998 (not modified).
IEC 60529 NOTE Harmonized as EN 60529:1991 + A1:2000 (not modified).
+ A1
__________
---------------------- Page: 3 ----------------------
- 3 - EN 60664-1:2007
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 When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
1)
IEC 60038 1983 IEC standard voltages HD 472 S1 1989
+ corr. February 2002
+ A1 1995
IEC 60050-151 2001 International Electrotechnical Vocabulary - -
(IEV) -
Part 151: Electrical and magnetic devices
IEC 60050-212 1990 International Electrotechnical Vocabulary - -
(IEV) -
Chapter 212: Insulating solids, liquids and
gases
IEC 60050-604 1987 International Electrotechnical Vocabulary - -
+ A1 1998 (IEV) -
Chapter 604: Generation, transmission and
distribution of electricity - Operation
IEC 60050-826 2004 International Electrotechnical Vocabulary - -
(IEV) -
Part 826: Electrical installations
2)
IEC 60068-1 1988 Environmental testing - EN 60068-1 1994
Part 1: General and guidance
3)
IEC 60068-2-2 1974 Environmental testing - EN 60068-2-2 1993
Part 2: Tests - Tests B: Dry heat
4)
IEC 60068-2-14 1984 Environmental testing - EN 60068-2-14 1999
Part 2: Tests - Test N: Change of temperature
IEC 60068-2-78 2001 Environmental testing - EN 60068-2-78 2001
Part 2-78: Tests - Test Cab: Damp heat,
steady state
IEC 60085 2004 Electrical insulation - Thermal classification EN 60085 2004
IEC 60099-1 1991 Surge arresters - EN 60099-1 1994
Part 1: Non-linear resistor type gapped surge
arresters for a.c. systems
1)
The title of HD 472 S1 is: Nominal voltages for low voltage public electricity supply systems.
2)
EN 60068-1 includes A1:1992 to IEC 60068-1 + corr. October.
3)
EN 60068-2-2 includes supplement A to IEC 60068-2-2.
4)
EN 60068-2-14 includes A1:1986 to IEC 60068-2-14.
---------------------- Page: 4 ----------------------
EN 60664-1:2007 - 4 -
Publication Year Title EN/HD Year
IEC 60112 2003 Method for the determination of the proof and EN 60112 2003
the comparative tracking indices of solid
insulating materials
IEC 60216 Series Electrical insulating materials - Properties of EN 60216 Series
thermal endurance
IEC 60243-1 1998 Electrical strength of insulating materials - EN 60243-1 1998
Test methods -
Part 1: Tests at power frequencies
IEC 60270 2000 High-voltage test techniques - Partial EN 60270 2001
discharge measurements
IEC 60364-4-44 2001 Electrical installations of buildings - - -
+ A1 (mod) 2003 Part 4-44: Protection for safety - Protection
against voltage disturbances and
electromagnetic disturbances
IEC 60664-4 2005 Insulation coordination for equipment within EN 60664-4 2006
low-voltage systems - + corr. October 2006
Part 4: Consideration of high-frequency
voltage stress
5) 6)
IEC 60664-5 - Insulation coordination for equipment within EN 60664-5 2003
low-voltage systems -
Part 5: A comprehensive method for
determining clearances and creepage
distances equal to or less than 2 mm
IEC 61140 2001 Protection against electric shock - Common EN 61140 2002
A1 (mod) 2004 aspects for installation and equipment A1 2006
IEC 61180-1 1992 High-voltage test techniques for low-voltage EN 61180-1 1994
equipment -
Part 1: Definitions, test and procedure
requirements
IEC 61180-2 1994 High-voltage test techniques for low-voltage EN 61180-2 1994
equipment -
Part 2: Test equipment
IEC Guide 104 1997 The preparation of safety publications and the - -
use of basic safety publications and group
safety publications
5)
Undated reference.
6)
Valid edition at date of issue.
---------------------- Page: 5 ----------------------
IEC 60664-1
Edition 2.0 2007-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Insulation coordination for equipment within low-voltage systems –
Part 1: Principles, requirements and tests
Coordination de l’isolement des matériels dans les systèmes (réseaux)
à basse tension –
Partie 1: Principes, exigences et essais
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XB
CODE PRIX
ICS 29.080; 29.080.30 ISBN 2-8318-9137-X
---------------------- Page: 6 ----------------------
– 2 – 60664-1 © IEC:2007
CONTENTS
1 Scope and object.7
2 Normative references .7
3 Terms and definitions .9
4 Basis for insulation coordination .14
4.1 General .14
4.2 Insulation coordination with regard to voltage.14
4.2.1 General .14
4.2.2 Insulation coordination with regard to long-term a.c. or d.c. voltages .15
4.2.3 Insulation coordination with regard to transient overvoltage.15
4.2.4 Insulation coordination with regard to recurring peak voltage.15
4.2.5 Insulation coordination with regard to temporary overvoltage.15
4.2.6 Insulation coordination with regard to environmental conditions.16
4.3 Voltages and voltage ratings .16
4.3.1 General .16
4.3.2 Determination of voltage for long-term stresses .16
4.3.3 Determination of rated impulse voltage.17
4.3.4 Determination of recurring peak voltage .19
4.3.5 Determination of temporary overvoltage .19
4.4 Frequency .20
4.5 Time under voltage stress .20
4.6 Pollution.20
4.6.1 General .20
4.6.2 Degrees of pollution in the micro-environment .21
4.6.3 Conditions of conductive pollution .21
4.7 Information supplied with the equipment.21
4.8 Insulating material.21
4.8.1 Comparative tracking index (CTI) .21
4.8.2 Electric strength characteristics .22
4.8.3 Thermal characteristics .22
4.8.4 Mechanical and chemical characteristics .22
5 Requirements and dimensioning rules .23
5.1 Dimensioning of clearances.23
5.1.1 General .23
5.1.2 Dimensioning criteria .23
5.1.3 Electric field conditions.24
5.1.4 Altitude.24
5.1.5 Dimensioning of clearances of functional insulation .24
5.1.6 Dimensioning of clearances of basic, supplementary and reinforced
insulation.24
5.1.7 Isolating distances.25
5.2 Dimensioning of creepage distances .25
5.2.1 General .25
5.2.2 Influencing factors .25
5.2.3 Dimensioning of creepage distances of functional insulation.27
5.2.4 Dimensioning of creepage distances of basic, supplementary and
reinforced insulation .27
5.2.5 Reduction of creepage distances with the use of a rib (ribs) .27
---------------------- Page: 7 ----------------------
60664-1 © IEC:2007 – 3 –
5.3 Requirements for design of solid insulation .28
5.3.1 General .28
5.3.2 Stresses .28
5.3.3 Requirements .30
6 Tests and measurements .32
6.1 Tests.32
6.1.1 General .32
6.1.2 Test for verification of clearances .33
6.1.3 Tests for the verification of solid insulation .36
6.1.4 Performing dielectric tests on complete equipment .41
6.1.5 Other tests .42
6.1.6 Measurement accuracy of test parameters .42
6.2 Measurement of creepage distances and clearances.43
Annex A (informative) Basic data on withstand characteristics of clearances .48
Annex B (informative) Nominal voltages of supply systems for different modes of
overvoltage control .53
Annex C (normative) Partial discharge test methods .55
Annex D (informative) Additional information on partial discharge test methods .60
Annex E (informative) Comparison of creepage distances specified in Table F.4 and
clearances in Table A.1 .63
Annex F (normative) Tables .64
Bibliography.73
Figure 1 – Recurring peak voltage .19
Figure 2 – Determination of the width (W) and height (H) of a rib .28
Figure 3 – Test voltages .40
Figure A.1 – Withstand voltage at 2 000 m above sea level .50
Figure A.2 – Experimental data measured at approximately sea level and their low
limits for inhomogeneous field.51
Figure A.3 – Experimental data measured at approximately sea level and their low
limits for homogeneous field .52
Figure C.1 – Earthed test specimen .55
Figure C.2 – Unearthed test specimen .55
Figure C.3 – Calibration for earthed test specimen .58
Figure C.4 – Calibration for unearthed test specimen.58
Figure D.1 – Partial discharge test circuits.60
---------------------- Page: 8 ----------------------
– 4 – 60664-1 © IEC:2007
Figure E.1 – Comparison of creepage distances specified in Table F.4 and clearances
in Table A.1 .63
Table A.1 – Withstand voltages in kilovolts for an altitude of 2 000 m above sea level .48
Table A.2 – Altitude correction factors .49
Table B.1 – Inherent control or equivalent protective control.53
Table B.2 – Cases where protective control is necessary and control is provided by
surge arresters having a ratio of clamping voltage to rated voltage not smaller than
that specified by IEC 60099-1 .54
Table F.1 – Rated impulse voltage for equipment energized directly from the low-
voltage mains .64
Table F.2 – Clearances to withstand transient overvoltages.65
Table F.3a – Single-phase three or two-wire a.c. or d.c. systems.66
Table F.3b – Three-phase four or three-wire a.c. systems.67
Table F.4 – Creepage distances to avoid failure due to tracking .68
Table F.5 – Test voltages for verifying clearances at different altitudes.70
Table F.6 – Severities for conditioning of solid insulation .70
Table F.7 – Clearances to withstand steady-state voltages, temporary overvoltages or
recurring peak voltages.71
Table F.7a – Dimensioning of clearances to withstand steady-state voltages,
temporary overvoltages or recurring peak voltages .71
Table F.7b – Additional information concerning the dimensioning of clearances to
avoid partial discharge.71
Table F.8 – Altitude correction factors.72
---------------------- Page: 9 ----------------------
60664-1 © IEC:2007 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
INSULATION COORDINATION FOR EQUIPMENT
WITHIN LOW-VOLTAGE SYSTEMS –
Part 1: Principles, 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 60664 has been prepared by technical committee 109: Insulation
coordination for low-voltage equipment.
This second edition cancels and replaces the first edition, published in 1992, amendments 1
(2000) and 2 (2002) and a corrigendum (2002).
It has the status of a basic safety publication in accordance with IEC Guide 104.
In addition to a number of editorial improvements, the following main changes have been
made with respect to the previous edition:
• Amendment of Japanese mains conditions with regard to the rated impulse voltages, the
rationalized voltages and the nominal voltages of supply systems for different modes of
overvoltage control
• Amendment of dimensioning of clearances smaller than 0,01 mm
---------------------- Page: 10 ----------------------
– 6 – 60664-1 © IEC:2007
• Alignment of the table and the corresponding formula regarding test voltages for verifying
clearances at different altitudes
• Amendment of interpolation of the creepage distance values for functional insulation
• Amendment of creepage distance dimensioning taking into account ribs
• Revision of the former Clause 4 "Tests and measurements" (now Clause 6) to achieve a
more detailed description of the tests and their purpose, the test equipment and possible
alternatives
• Change of Annex C "Partial discharge test methods" from a former technical report,
Type 2 (now called TS), to a normative Annex C.
The text of this standard is based on the following documents:
CDV Report on voting
109/58/CDV 109/62/RVC
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.
A list of all parts in the IEC 60664 series, under the general title Insulation coordination for
equipment within low-voltage systems, can be found on the IEC website.
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.
---------------------- Page: 11 ----------------------
60664-1 © IEC:2007 – 7 –
INSULATION COORDINATION FOR EQUIPMENT
WITHIN LOW-VOLTAGE SYSTEMS –
Part 1: Principles, requirements and tests
1 Scope and object
This part of IEC 60664 deals with insulation coordination for equipment within low-voltage
systems. It applies to equipment for use up to 2 000 m above sea level having a rated voltage
up to a.c. 1 000 V with rated frequencies up to 30 kHz, or a rated voltage up to d.c. 1 500 V.
It specifies the requirements for clearances, creepage distances and solid insulation for
equipment based upon their performance criteria. It includes methods of electric testing with
respect to insulation coordination.
The minimum clearances specified in this standard do not apply where ionized gases occur.
Special requirements for such situations may be specified at the discretion of the relevant
technical committee.
This standard does not deal with distances
– through liquid insulation,
– through gases other than air,
– through compressed air.
NOTE 1 Insulation coordination for equipment within low-voltage systems with rated frequencies above 30 kHz is
given in IEC 60664-4.
NOTE 2 Higher voltages may exist in internal circuits of the equipment.
NOTE 3 Guidance for dimensioning for altitudes exceeding 2 000 m is given in Table A.2.
The object of this basic safety standard is to guide technical committees responsible for
different equipment in order to rationalize their requirements so that insulation coordination is
achieved.
It provides the information necessary to give guidance to technical committees when
specifying clearances in air, creepage distances and solid insulation for equipment.
Care should be taken to see that manufacturers and technical committees are responsible for
application of the requirements, as specified in this basic safety publication, or make
reference to it, where necessary, in standards for equipment within their scope.
In the case of missing specified values for clearances, creepage distances and requirements
for solid insulation in the relevant product standards, or even missing standards, this standard
is applicable.
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
o
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.