Electrical equipment for measurement, control and laboratory use - EMC requirements - Part 1: General requirements

IEC 61326-1:2020 is available as IEC 61326-1:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61326:2020 specifies requirements for immunity and emissions regarding electro¬magnetic compatibility (EMC) for electrical equipment, operating from a supply or battery of less than 1 000 V AC or 1 500 V DC or from the circuit being measured. Equipment intended for professional, industrial-process, industrial-manufacturing and educational use is covered by this part. It includes equipment and computing devices for
- measurement and test;
- control;
- LABORATORY use;
- accessories intended for use with the above (such as sample handling equipment),
intended to be used in industrial and non-industrial locations.

Matériel électrique de mesure, de commande et de laboratoire - Exigences relatives à la CEM - Partie 1: Exigences générales

IEC 61326-1:2020 est disponible sous forme de IEC 61326-1:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L’IEC 61326:2020 spécifie les exigences relatives à l'immunité et aux émissions concernant la compatibilité électromagnétique (CEM) pour les matériels électriques fonctionnant à partir d'une source d'alimentation ou d'une batterie inférieure à 1 000 V en courant alternatif ou 1 500 V en courant continu ou à partir du circuit mesuré. Elle concerne les matériels prévus pour un usage professionnel, pour les processus industriels et pour l'enseignement. Cela comprend les matériels et les dispositifs informatiques pour
- le mesurage et les essais;
- la commande;
- les applications en LABORATOIRE;
- les accessoires prévus pour être utilisés dans les cas susmentionnés (par exemple, matériel de manipulation d’échantillons),
dans un usage en milieu industriel ou non industriel.

General Information

Status
Published
Publication Date
25-Oct-2020
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
26-Oct-2020
Ref Project

Buy Standard

Standard
IEC 61326-1:2020 - Electrical equipment for measurement, control and laboratory use - EMC requirements - Part 1: General requirements
English and French language
49 pages
sale 15% off
Preview
sale 15% off
Preview

Standards Content (sample)

IEC 61326-1
Edition 3.0 2020-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical equipment for measurement, control and laboratory use –
EMC requirements –
Part 1: General requirements
Matériel électrique de mesure, de commande et de laboratoire –
Exigences relatives à la CEM –
Partie 1: Exigences générales
IEC 61326-1:2020-10(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2020 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC

copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite

ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie

et les microfilms, sans l'accord écrit de l'IEC ou du Comité national de l'IEC du pays du demandeur. Si vous avez des

questions sur le copyright de l'IEC ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez

les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC

The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes

International Standards for all electrical, electronic and related technologies.
About IEC publications

The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org

The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,

variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English

committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.

and withdrawn publications. Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Just Published - webstore.iec.ch/justpublished

Stay up to date on all new IEC publications. Just Published IEC Glossary - std.iec.ch/glossary

details all new publications released. Available online and 67 000 electrotechnical terminology entries in English and

once a month by email. French extracted from the Terms and Definitions clause of

IEC publications issued since 2002. Some entries have been

IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and

If you wish to give us your feedback on this publication or CISPR.
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
A propos de l'IEC

La Commission Electrotechnique Internationale (IEC) est la première organisation mondiale qui élabore et publie des

Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.

A propos des publications IEC

Le contenu technique des publications IEC est constamment revu. Veuillez vous assurer que vous possédez l’édition la

plus récente, un corrigendum ou amendement peut avoir été publié.
Recherche de publications IEC - Electropedia - www.electropedia.org

webstore.iec.ch/advsearchform Le premier dictionnaire d'électrotechnologie en ligne au

La recherche avancée permet de trouver des publications IEC monde, avec plus de 22 000 articles terminologiques en

en utilisant différents critères (numéro de référence, texte, anglais et en français, ainsi que les termes équivalents dans

comité d’études,…). Elle donne aussi des informations sur les 16 langues additionnelles. Egalement appelé Vocabulaire

projets et les publications remplacées ou retirées. Electrotechnique International (IEV) en ligne.

IEC Just Published - webstore.iec.ch/justpublished Glossaire IEC - std.iec.ch/glossary

Restez informé sur les nouvelles publications IEC. Just 67 000 entrées terminologiques électrotechniques, en anglais

Published détaille les nouvelles publications parues. et en français, extraites des articles Termes et Définitions des

Disponible en ligne et une fois par mois par email. publications IEC parues depuis 2002. Plus certaines entrées

antérieures extraites des publications des CE 37, 77, 86 et
Service Clients - webstore.iec.ch/csc CISPR de l'IEC.
Si vous désirez nous donner des commentaires sur cette
publication ou si vous avez des questions contactez-nous:
sales@iec.ch.
---------------------- Page: 2 ----------------------
IEC 61326-1
Edition 3.0 2020-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical equipment for measurement, control and laboratory use –
EMC requirements –
Part 1: General requirements
Matériel électrique de mesure, de commande et de laboratoire –
Exigences relatives à la CEM –
Partie 1: Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20; 25.040.40; 33.100.20 ISBN 978-2-8322-8947-1

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61326-1:2020 © IEC 2020
CONTENTS

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

INTRODUCTION ..................................................................................................................... 6

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 8

3 Terms, definitions and abbreviations ............................................................................... 9

3.1 Terms and definitions .............................................................................................. 9

3.2 Abbreviations ........................................................................................................ 12

4 General ......................................................................................................................... 12

5 EMC test plan ................................................................................................................ 12

5.1 General ................................................................................................................. 12

5.2 Configuration of EUT during testing ...................................................................... 13

5.2.1 General ......................................................................................................... 13

5.2.2 Composition of EUT ....................................................................................... 13

5.2.3 Assembly of EUT ........................................................................................... 13

5.2.4 I/O PORTS ...................................................................................................... 13

5.2.5 AUXILIARY EQUIPMENT ..................................................................................... 13

5.2.6 Cabling and earthing (grounding) ................................................................... 13

5.3 Operation conditions of EUT during testing ........................................................... 13

5.3.1 Operation modes ........................................................................................... 13

5.3.2 Environmental conditions ............................................................................... 14

5.3.3 EUT software during test ............................................................................... 14

5.4 Specification of FUNCTIONAL PERFORMANCE ............................................................ 14

5.5 Test description .................................................................................................... 14

6 Immunity requirements .................................................................................................. 14

6.1 Conditions during the tests.................................................................................... 14

6.2 Immunity test requirements ................................................................................... 14

6.3 Random aspects ................................................................................................... 17

6.4 Performance criteria ............................................................................................. 18

6.4.1 General ......................................................................................................... 18

6.4.2 Performance criterion A ................................................................................. 18

6.4.3 Performance criterion B ................................................................................. 18

6.4.4 Performance criterion C ................................................................................. 18

7 Emission requirements .................................................................................................. 19

7.1 Conditions during measurements .......................................................................... 19

7.2 Emission limits ...................................................................................................... 19

8 Test results and test report ............................................................................................ 19

9 Instructions for use ........................................................................................................ 20

Annex A (normative) Immunity test requirements for PORTABLE TEST AND MEASUREMENT

EQUIPMENT powered by battery or from the circuit being measured ........................................ 21

Annex B (informative) Guide for analysis and assessment for electromagnetic

compatibility.......................................................................................................................... 22

B.1 General ................................................................................................................. 22

B.2 Risk analysis......................................................................................................... 22

B.3 Risk assessment ................................................................................................... 22

Bibliography .......................................................................................................................... 24

---------------------- Page: 4 ----------------------
IEC 61326-1:2020 © IEC 2020 – 3 –

Figure 1 – Examples of ports ................................................................................................ 11

Table 1 – Immunity test requirements for equipment intended to be used in a BASIC

ELECTROMAGNETIC ENVIRONMENT ............................................................................................ 15

Table 2 – Immunity test requirements for equipment intended to be used in an

INDUSTRIAL ELECTROMAGNETIC ENVIRONMENT ........................................................................... 16

Table 3 – Immunity test requirements for equipment intended to be used in a

CONTROLLED ELECTROMAGNETIC ENVIRONMENT ........................................................................ 17

Table A.1 – Immunity test requirements for PORTABLE TEST AND MEASUREMENT

EQUIPMENT ............................................................................................................................ 21

---------------------- Page: 5 ----------------------
– 4 – IEC 61326-1:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL EQUIPMENT FOR MEASUREMENT,
CONTROL AND LABORATORY USE –
EMC REQUIREMENTS –
Part 1: General requirements
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 61326-1 has been prepared by subcommittee 65A: System

aspects, of IEC technical committee 65: Industrial-process measurement, control and

automation.

This third edition cancels and replaces the second edition, published in 2012. This edition

constitutes a technical revision.

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

edition:
– the immunity test levels and performance criteria have been reviewed;

– requirements for portable test and measurement equipment have been clarified and

amended;
---------------------- Page: 6 ----------------------
IEC 61326-1:2020 © IEC 2020 – 5 –
– the description of the electromagnetic environments has been improved.
The text of this International Standard is based on the following documents:
FDIS Report on voting
65A/975/FDIS 65A/985/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

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

In this document, the following print types are used:
• Terms used throughout this document which have been defined in Clause 3: SMALL
CAPITALS

A list of all parts of the IEC 61326 series under the general title Electrical equipment for

measurement, control and laboratory use – EMC requirements, can be found on the IEC

website.

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

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 7 ----------------------
– 6 – IEC 61326-1:2020 © IEC 2020
INTRODUCTION

Instruments and equipment within the scope of this document may often be geographically

widespread and hence operate under a wide range of environmental conditions.

The limitation of undesired electromagnetic emissions ensures that no other equipment

installed nearby is unduly influenced by the equipment under consideration. The limits are

more or less specified by, and therefore taken from, IEC and International Special Committee

on Radio Interference (CISPR) publications.

However, the equipment should function without undue degradation in an electromagnetic

environment typical for the locations where it is intended to be operated. In this respect, the

document specifies three different types of electromagnetic environment and the levels for

immunity. More detailed information about issues related to electromagnetic environments are

given in IEC TR 61000-2-5. Special risks, involving for example nearby or direct lightning

strikes, circuit-breaking, or exceptionally high electromagnetic radiation in close proximity, are

not covered.

Complex electric and/or electronic systems should require EMC planning in all phases of their

design and installation, taking into consideration the electromagnetic environment, any

special requirements, and the severity of failures.

This part of IEC 61326 specifies the EMC requirements that are generally applicable to all

equipment within its scope. For certain types of equipment, these requirements will be

supplemented or modified by the special requirements of one, or more than one, particular

part IEC 61326-2 (all parts). These should be read in conjunction with the IEC 61326-1

requirements.
---------------------- Page: 8 ----------------------
IEC 61326-1:2020 © IEC 2020 – 7 –
ELECTRICAL EQUIPMENT FOR MEASUREMENT,
CONTROL AND LABORATORY USE –
EMC REQUIREMENTS –
Part 1: General requirements
1 Scope

This part of IEC 61326 specifies requirements for immunity and emissions regarding electro-

magnetic compatibility (EMC) for electrical equipment, operating from a supply or battery of

less than 1 000 V AC or 1 500 V DC or from the circuit being measured. Equipment intended

for professional, industrial-process, industrial-manufacturing and educational use is covered

by this part. It includes equipment and computing devices for
– measurement and test;
– control;
– LABORATORY use;

– accessories intended for use with the above (such as sample handling equipment),

intended to be used in industrial and non-industrial locations.

Computing devices and assemblies and similar equipment within the scope of information

technology equipment (ITE) and complying with applicable ITE EMC standards can be used in

systems within the scope of this part of IEC 61326 without additional testing, if they are

suitable for the intended electromagnetic environment.

It is generally considered that this product family standard takes precedence over the

corresponding generic EMC standards.
The following equipment is covered by this document.
a) Electrical measurement and test equipment

This is equipment which, by electrical means, measures, indicates or records one or more

electrical or non-electrical quantities, also non-measuring equipment such as signal

generators, measurement standards, power supplies and transducers.
b) Electrical control equipment

This is equipment which controls one or more output quantities to specific values, with

each value determined by manual settings, by local or remote programming, or by one or

more input variables. This includes industrial process measurement and control (IPMC)

equipment, which consists of devices such as:
– process controllers and regulators;
– programmable controllers;
– power supply units for equipment and systems (centralized or dedicated);
– analogue/digital indicators and recorders;
– process instrumentation;
– transducers, positioners, intelligent actuators, etc.

c) Electrical LABORATORY equipment, including In Vitro Diagnostic (IVD) medical equipment

This is equipment used to prepare or analyse materials, or measure, indicate or monitor

physical quantities. This equipment might also be used in areas other than laboratories.

---------------------- Page: 9 ----------------------
– 8 – IEC 61326-1:2020 © IEC 2020

d) Equipment a), b) or c) as above when being equipped with components having radio

functionality, for example for wireless communication.

Equipment within the scope of this document might be operated in different electromagnetic

environments; depending on the electromagnetic environment different emission and immunity

test requirements are applicable.
This document considers three types of electromagnetic environments:
• BASIC ELECTROMAGNETIC ENVIRONMENT;
• INDUSTRIAL ELECTROMAGNETIC ENVIRONMENT;
• CONTROLLED ELECTROMAGNETIC ENVIRONMENT.
Corresponding immunity test requirements are described in Clause 6.

In terms of emission requirements, equipment shall be classified in Class A or Class B

equipment, as per the requirements and procedure of CISPR 11. The corresponding emission

requirements are described in Clause 7.

The specified emission and immunity requirements aim at achieving electromagnetic

compatibility between equipment covered in this document and other equipment that might

operate at locations with electromagnetic environments considered in this document.

Guidance for an assessment concerning the risk for achieving EMC is given in Annex B.

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 60050-161:1990, International Electrotechnical Vocabulary (IEV) – Part 161:
Electromagnetic compatibility
IEC 60050-161:1990/AMD1:1997
IEC 60050-161:1990/AMD2:1998
IEC 60050-161:1990/AMD3:2014
IEC 60050-161:1990/AMD4:2014
IEC 60050-161:1990/AMD5:2015
IEC 60050-161:1990/AMD6:2016
IEC 60050-161:1990/AMD7:2017
IEC 60050-161:1990/AMD8:2018
(available at )

IEC 61000-3-2:2018, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for

harmonic current emissions (equipment input current ≤16 A per phase)

IEC 61000-3-3:2013, Electromagnetic compatibility (EMC) – Part 3-3: Limits – Limitation of

voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for

equipment with rated current ≤16 A per phase and not subject to conditional connection

IEC 61000-3-3:2013/AMD1:2017

IEC 61000-3-11:2017, Electromagnetic compatibility (EMC) – Part 3-11: Limits – Limitation of

voltage changes, voltage fluctuations and flicker in public low-voltage supply systems –

Equipment with rated current ≤75 A and subject to conditional connection
---------------------- Page: 10 ----------------------
IEC 61326-1:2020 © IEC 2020 – 9 –

IEC 61000-3-12:2011, Electromagnetic compatibility (EMC) – Part 3-12: Limits – Limits for

harmonic currents produced by equipment connected to public low-voltage systems with input

current >16 A and ≤75 A per phase
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and

measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test

IEC 61000-4-3:2006/AMD1:2007
IEC 61000-4-3:2006/AMD2:2010

IEC 61000-4-4:2012, Electromagnetic compatibility (EMC) – Part 4-4: Testing and measure-

ment techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5:2014, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61000-4-5:2014/AMD1:2017
IEC 61000-4-6:2013, Electromagnetic compatibility (EMC) – Part 4-6: Testing and

measurement techniques – Immunity to conducted disturbances, induced by radio-frequency

fields
IEC 61000-4-8:2009, Electromagnetic compatibility (EMC) – Part 4-8: Testing and
measurement techniques – Power frequency magnetic field immunity test

IEC 61000-4-11:2020, Electromagnetic compatibility (EMC) – Part 4-11: Testing and

measurement techniques – Voltage dips, short interruptions and voltage variations immunity

tests for equipment with input current up to 16 A per phase

CISPR 11:2015, Industrial, scientific and medical equipment – Radio-frequency disturbance

characteristics – Limits and methods of measurement
CISPR 11:2015/AMD1:2016
CISPR 11:2015/AMD2:2019
3 Terms, definitions and abbreviations
3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60050-161 and the

following 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
3.1.1
basic electromagnetic environment

environment existing at locations characterized by being supplied directly at low voltage from

the public mains network
EXAMPLES
– residential properties, for example houses, apartments;
– retail outlets, for example shops, supermarkets;
– business premises, for example offices, banks;
---------------------- Page: 11 ----------------------
– 10 – IEC 61326-1:2020 © IEC 2020
– areas of public entertainment, for example cinemas, public bars, dance halls;

– outdoor locations, for example petrol stations, car parks, amusement and sports centres;

– light-industrial locations, for example workshops, laboratories, service centres.

3.1.2
class A equipment

equipment suitable for use in all locations other than those allocated in residential

environments and those directly connected to a low voltage power supply network which

supplies buildings used for domestic purposes
[SOURCE: derived from CISPR 11:2015, 5.2]
3.1.3
class B equipment

equipment suitable for use in locations in residential environments and in establishments

directly connected to a low voltage power supply network which supplies buildings used for

domestic purposes
[SOURCE: derived from CISPR 11:2015, 5.2]
3.1.4
controlled electromagnetic environment

environment usually characterized by recognition and control of EMC threats by users of the

equipment or by design of the installation
3.1.5
enclosure port

physical boundary of equipment through which electromagnetic fields may radiate or impinge

3.1.6
functional performance

operational performance characteristics defining the ability of equipment to achieve the

intended functions

Note 1 to entry: Characteristics can be based on the related technical documentation.

3.1.7
industrial electromagnetic environment

environment existing at locations characterized by a separate power network, in most cases

supplied from a high- or medium-voltage transformer, dedicated for the supply of installations

feeding manufacturing or similar plants with one or more of the following conditions:

– frequent switching of heavy inductive or capacitive loads;
– high currents and associated magnetic fields;

– presence of Industrial, Scientific and Medical (ISM) equipment (for example, welding

machines)
3.1.8
laboratory

test and measurement area that is specifically used for analysis, testing and servicing and

where equipment is operated by trained personnel
3.1.9
long-distance lines

lines within a building which are longer than 30 m, or which leave the building (including lines

of outdoor installations)
-------------------
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.