IEC 61010-2-030:2017

Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-030: Particular requirements for equipment having testing or measuring circuits

IEC 61010-2-030:2017 This group safety publication is primarily intended to be used as a product safety standard for the products mentioned in the scope, but shall also be used by technical committees in the preparation of their publications for products similar to those mentioned in the scope of this standard, in accordance with the principles laid down in IEC Guide 104 and lSO/lEC Guide 51.
IEC 61010-2-030:2017 specifies safety requirements for equipment having testing or measuring circuits which are connected for test or measurement purposes to devices or circuits outside the measurement equipment itself.
These include measuring circuits which are part of electrical test and measurement equipment, laboratory equipment, or process control equipment. The existence of these circuits in equipment requires additional protective means between the circuit and an OPERATOR.
This second edition cancels and replaces the first edition published in 2010. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
Reference to IEC 61010-031 for probe assemblies and IEC 61010-032 for current sensors has been added.
Indirect bonding for testing and measuring circuits has been modified, in particular to take into account the duration of current flow versus body current for a.c. and d.c. currents according to IEC TS 60479-1 and IEC TS 60479-2.
Clearance and creepage distance for wet locations and for measuring circuit terminal exceeding 1 000 V a.c. or d.c have been specified.
The voltage source for testing overvoltage limiting component or circuit may be limited to 400 V.
Requirements against transient overvoltages for mains voltage measuring circuits have been added.
Requirements for measuring circuits from 1 000 V d.c. to 1 500 V d.c. have been added.
The corrigendum has been included in Tables K.102 to K.104.
Requirements for reduction of transient overvoltages have been modified.
An informative Annex CC about the dimensions of banana terminals has been added.
Flowchart for insulation according to the type of circuit has been added in a new Annex DD.
It has the status of a group safety publication in accordance with IEC Guide 104.

Exigences de sécurité pour appareils électriques de mesurage, de régulation et de laboratoire - Partie 2-030: Exigences particulières pour les appareils équipés de circuits d'essai ou de mesure

L'IEC 61010-2-030:2017 La présente publication groupée de sécurité est avant tout destinée à être utilisée en tant que norme en matière de sécurité des produits pour les produits cités dans le domaine d'application. Elle doit également être utilisée par les comités d'études dans le cadre de l'élaboration de leurs publications pour des produits similaires à ceux cités dans le domaine d'application de la présente norme, conformément aux principes établis dans le Guide IEC 104 et le Guide ISO/IEC 51.
La présente partie de l'IEC 61010 spécifie les exigences de sécurité pour les appareils équipés de circuits d'essai ou de mesure qui sont reliés à des fins d'essai ou de mesurage à des dispositifs ou à des circuits extérieurs à l'appareil de mesure.
Ceux-ci comprennent les circuits de mesure qui font partie d'appareils électriques d'essai et de mesure, d'appareils de laboratoire ou d'appareils de contrôle de processus. L’existence de ces circuits dans l'appareil exige des moyens de protection additionnels entre le circuit et un opérateur.
Cette deuxième édition annule et remplace la première édition parue en 2010. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
Une référence à l’IEC 61010-031 pour les sondes équipées et à l’IEC 61010-2-032 pour les capteurs de courant a été ajoutée.
La liaison indirecte pour les circuits d’essai et de mesure a été modifiée, notamment pour prendre en compte la durée de l’écoulement du courant par rapport au courant passant par le corps pour le courant alternatif et le courant continu conformément à l’IEC TS 60479-1 et l’IEC TS 60479-2.
Des lignes de fuite et distances d'isolement pour les emplacements humides et pour la borne du circuit de mesure de tension supérieure à 1000 V en courant alternatif ou en courant continu ont été spécifiées.
La source de tension pour les essais du composant ou du circuit de limitation des surtensions peut être limitée à 400 V.
Des exigences relatives aux surtensions transitoires applicables aux circuits de mesure de la tension réseau ont été ajoutées.
Des exigences applicables aux circuits de mesure entre 1 000 V et 1 500 V en courant continu ont été ajoutées.
Le corrigendum a été inclus dans les Tableaux K.102 à K.104.
Les exigences applicables à la réduction des surtensions transitoires ont été modifiées.
Une Annexe CC informative relative aux dimensions des bornes «banane» a été ajoutée.
Un organigramme de l’isolation selon le type de circuit a été ajouté dans une nouvelle Annexe DD.
Elle a le statut d'une publication groupée de sécurité conformément au Guide IEC 104.

General Information

• Status: Published
• Publication Date: 11-Jan-2017
• ICS: 19.080 - Electrical and electronic testing
• ICS: 71.040.10 - Chemical laboratories. Laboratory equipment
• Technical Committee: TC 66 - Safety of measuring, control and laboratory equipment
• Drafting Committee: WG 2 - TC 66/WG 2
• Current Stage: DELPUB - Deleted Publication
• Start Date: 20-Sep-2023
• Completion Date: 01-Dec-2022

Relations

• Revises: IEC 61010-2-030:2010/COR1:2011 - Corrigendum 1 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-030: Particular requirements for testing and measuring circuits
• Effective Date: 05-Sep-2023
• Revises: IEC 61010-2-030:2010 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-030: Particular requirements for testing and measuring circuits
• Effective Date: 05-Sep-2023
• Revised: IEC 61010-2-030:2023 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-030: Particular requirements for equipment having testing or measuring circuits
• Effective Date: 05-Sep-2023

Overview

IEC 61010-2-030:2017 is a Part 2 particular standard in the IEC 61010 family that defines safety requirements for equipment having testing or measuring circuits. It applies to electrical test & measurement equipment, laboratory instruments and process-control devices whose measuring or testing circuits connect to external devices or circuits. This edition (2017, Edition 2.0) is a technical revision to the 2010 edition and has the status of a group safety publication under IEC Guide 104.

Key topics and technical requirements

This standard supplements IEC 61010-1 and focuses on hazards specific to measuring/testing circuits. Important technical topics include:

• Protection against electric shock for operators when testing or measuring live circuits, including additional protective means between the measuring circuit and the operator.
• Insulation, clearance and creepage distances (including specifications for wet locations and for terminals exceeding 1 000 V a.c. or 1 500 V d.c.).
• Transient overvoltage requirements, with added protections for mains-voltage measuring circuits and modified requirements for reduction of transient overvoltages.
• Indirect bonding rules for testing/measuring circuits, revised to consider duration of current flow vs body current using IEC TS 60479-1 and IEC TS 60479-2 guidance.
• Test voltages and impulse withstand values for measuring circuits (see normative tables K.102–K.104 and K.105).
• Limits for overvoltage testing: the voltage source for testing overvoltage-limiting components may be limited to 400 V under defined conditions.
• New/updated annexes: informative Annex CC (dimensions of 4 mm “banana” terminals) and Annex DD (flowchart for insulation by circuit type) plus measurement-category and insulation guidance.

Practical applications and who uses it

IEC 61010-2-030:2017 is used to design, assess and certify safety of equipment that connects test or measuring circuits to external devices. Typical users:

• Manufacturers of oscilloscopes, multimeters, insulation testers, process instrumentation and laboratory instruments.
• Product safety engineers, R&D teams and compliance officers ensuring designs meet international safety requirements.
• Test houses, certification bodies and compliance assessors who evaluate electrical safety and insulation/clearance compliance.
• Technical committees and standards writers who reference this Part 2 when developing related product standards.

Related standards

• IEC 61010-1 (general safety requirements for measurement, control and laboratory equipment) - read in conjunction with this Part 2.
• IEC 61010-031 (probe assemblies) and IEC 61010-032 (current sensors) - referenced in this edition.
• IEC TS 60479-1 / 60479-2 (effects of current on the human body) - used for bonding/current-duration guidance.

Keywords: IEC 61010-2-030:2017, safety requirements, measuring circuits, clearance creepage, transient overvoltages, test & measurement equipment, laboratory safety.

Standards Content (Sample)

IEC 61010-2-030 ®
Edition 2.0 2017-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
GROUP SAFETY PUBLICATION
Safety requirements for electrical equipment for measurement, control, and
laboratory use –
Part 2-030: Particular requirements for equipment having testing and or
measuring circuits
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.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]

CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
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 corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
IEC 61010-2-030 ®
Edition 2.0 2017-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
GROUP SAFETY PUBLICATION
Safety requirements for electrical equipment for measurement, control, and

laboratory use –
Part 2-030: Particular requirements for equipment having testing and or

measuring circuits
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.080; 71.040.10 ISBN 978-2-8322-3833-2

– 2 – IEC 61010-2-030:2017 RLV © IEC 2017

CONTENTS
FOREWORD . 4

INTRODUCTION . 7

1 Scope and object . 8

2 Normative references . 8

3 Terms and definitions . 9

4 Tests . 9

5 Marking and documentation . 9
6 Protection against electric shock . 11
7 Protection against mechanical HAZARDS . 16
8 Resistance to mechanical stresses . 16
9 Protection against the spread of fire . 16
10 Equipment temperature limits and resistance to heat . 16
11 Protection against HAZARDS from fluids and solid foreign objects . 16
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure . 16
13 Protection against liberated gases and substances, explosion and implosion . 16
14 Components and subassemblies . 16
15 Protection by interlocks . 18
16 HAZARDS resulting from application . 18
17 RISK assessment . 18
101 Measuring circuits . 18
Annexes . 24
Annex K (normative) Insulation requirements not covered by 6.7 . 24
Annex L (informative) Index of defined terms . 31
Annex AA (normative) Measurement categories . 32
Annex BB (informative) HAZARDS pertaining to measurements performed in certain
environments . 35
Annex CC (informative) 4 mm “banana” TERMINALS . 38
Annex DD (informative) Flowchart for insulation according to the type of circuit . 40

Bibliography . 43

Figure 101 – Duration of current flow versus body current for a.c. and d.c. currents. 13
Figure AA.1 – Example to identify the locations of measuring circuits . 33
Figure CC.1 – Recommended dimensions of 4 mm TERMINALS . 39
Figure DD.1 – Requirements for CLEARANCE, CREEPAGE DISTANCE and solid insulation . 42

Table 101 – CLEARANCES and CREEPAGE DISTANCES for measuring circuit TERMINALS
with HAZARDOUS LIVE conductive parts up to 1 000 V a.c. or 1 500 V d.c . 14
Table 102 – Impulse withstand voltages . 17
Table K.101 – CLEARANCES for measuring circuits of MEASUREMENT CATEGORIES II, III
and IV . 26
Table K.102 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY II . 27

Table K.103 – Test voltages for testing electric strength for of solid insulation in

measuring circuits of MEASUREMENT CATEGORY III . 27

Table K.104 – Test voltages for testing electric strength of solid insulation in

measuring circuits of MEASUREMENT CATEGORY IV . 28

Table K.105 – Test voltages for testing long term stress of solid insulation in
measuring circuits . 28

Table K.106 – Maximum TRANSIENT OVERVOLTAGES . 30

Table AA.1 – Characteristics of MEASUREMENT CATEGORIES . 34

– 4 – IEC 61010-2-030:2017 RLV © IEC 2017

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT

FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-030: Particular requirements for equipment

having testing and or measuring circuits

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 redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.

International Standard IEC 61010-2-030 has been prepared by IEC technical committee 66:
Safety of measuring, control and laboratory equipment.

It has the status of a group safety publication in accordance with IEC Guide 104.

This second edition cancels and replaces the first edition published in 2010. This edition
constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous
edition:
a) Reference to IEC 61010-031 for probe assemblies and IEC 61010-032 for current sensors
has been added.
b) Indirect bonding for testing and measuring circuits has been modified, in particular to take
into account the duration of current flow versus body current for a.c. and d.c. currents
according to IEC TS 60479-1 and IEC TS 60479-2.
c) CLEARANCE and CREEPAGE DISTANCE for WET LOCATIONS and for measuring circuit TERMINAL
exceeding 1 000 V a.c. or d.c have been specified.
d) The voltage source for testing overvoltage limiting component or circuit may be limited to
400 V.
e) Requirements against TRANSIENT OVERVOLTAGES for MAINS voltage measuring circuits have
been added.
f) Requirements for measuring circuits from 1 000 V d.c. to 1 500 V d.c. have been added.
g) The corrigendum has been included in Tables K.102 to K.104.
h) Requirements for reduction of TRANSIENT OVERVOLTAGES have been modified.
i) An informative Annex CC about the dimensions of banana TERMINALS has been added.
j) Flowchart for insulation according to the type of circuit has been added in a new Annex
DD.
The text of this standard is based on the following documents:
FDIS Report on voting
66/613/FDIS 66/621/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 Part 2-030 is to be used in conjunction with the latest edition of IEC 61010-1. It was
established on the basis of the third edition (2010) of IEC 61010-1, including its amendment 1
(2016).
This Part 2-030 supplements or modifies the corresponding clauses in IEC 61010-1 so as to
convert that publication into the IEC standard: Particular requirements for equipment having
testing or measuring circuits.
Where a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. Where this part states “addition”, “modification”, “replacement”, or
“deletion” the relevant requirement, test specification or note in Part 1 should be adapted
accordingly.
– 6 – IEC 61010-2-030:2017 RLV © IEC 2017

In this standard:
a) the following print types are used:

– requirements: in roman type;

– NOTES: in small roman type;
– conformity and test: in italic type;

– terms used throughout this standard which have been defined in Clause 3: SMALL

ROMAN CAPITALS;
b) subclauses, figures, tables and notes which are additional to those in Part 1 are numbered

starting from 101. Additional annexes are lettered starting from AA and additional list

items are lettered from aa).
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61010 series, under the general title Safety requirements for
electrical equipment for measurement, control, and laboratory use, can be found on the IEC
website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website 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.
INTRODUCTION
IEC 61010-1 specifies the safety requirements that are generally applicable to all equipment

within its scope. For certain types of equipment, the requirements of IEC 61010-1 and its

amendment will be supplemented or modified by the special requirements of one, or more

than one, particular Part 2 of the standard which are read in conjunction with the Part 1

requirements.
This Part 2-030 specifies the safety requirements for equipment with testing or measuring

circuits which are connected for test or measurement purposes to devices or circuits outside

the measurement equipment itself.

Part 2-032 specifies the safety requirements for HAND-HELD and hand-manipulated current
sensors (see Clause 1 of Part 2-032). Requirements of Part 2-030 have been included in Part
2-032. Equipment within the scopes of Part 2-030 and Part 2-032 are considered to be
covered by the requirements of Part 2-032.
Part 2-033 specifies the safety requirements for HAND-HELD MULTIMETERS and other METERS
that have a primary purpose of measuring voltage on a live MAINS. Requirements of Part 2-030
have been included in Part 2-033. Parts of equipment within the scopes of Part 2-030 and
Part 2-033 are considered to be covered by the requirements of Part 2-033.
Part 2-034 specifies the safety requirements for measurement equipment for insulation
resistance and test equipment for electric strength which are connected to units, lines or
circuits for test or measurement purposes. Requirements of Part 2-030 have been included in
Part 2-034. Equipment within the scopes of Part 2-030 and Part 2-034 are considered to be
covered by the requirements of Part 2-034.
However, for equipment within the scope of Part 2-032, Part 2-033 and Part 2-034, the
standards are read in conjunction.

– 8 – IEC 61010-2-030:2017 RLV © IEC 2017

SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT

FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-030: Particular requirements for equipment

having testing and or measuring circuits

1 Scope and object
This clause of Part 1 is applicable except as follows:
1.1.1 Equipment included in scope
Replacement:
Replace the text with the following:
This group safety publication is primarily intended to be used as a product safety standard for
the products mentioned in the scope, but shall also be used by technical committees in the
preparation of their publications for products similar to those mentioned in the scope of this
standard, in accordance with the principles laid down in IEC Guide 104 and
lSO/lEC Guide 51.
This part of IEC 61010 specifies safety requirements for equipment having testing and or
measuring circuits which are connected for test or measurement purposes to devices or
circuits outside the measurement equipment itself.
These include measuring circuits which are part of electrical test and measurement
equipment, laboratory equipment, or process control equipment. The existence of these
circuits in equipment requires additional protective means between the circuit and an
OPERATOR.
NOTE 1 These testing and measuring circuits may can, for example:
– measure voltages in circuits of other equipment,
– measure temperature of a separate device via a thermocouple,
– measure force on a separate device via a strain gauge,
– inject a voltage onto a circuit to analyse a new design.

NOTE 2 Testing and measuring circuits that are not within the scope of this Part 2 are considered to be covered
by the requirements of Part 1.
NOTE 3 Equipment containing having these testing and measuring circuits may be intended for
performing tests and measurements on hazardous conductors, including MAINS conductors
and telecommunication network conductors. See Annex BB for considerations of HAZARDS
involved in various tests and measurements.
2 Normative references
This clause of Part 1 is applicable except as follows:
Replacement:
Replace
IEC 60364-4-44, Low-voltage electrical installations – Part 4-44: Protection for safety –

Protection against voltage disturbances and electromagnetic disturbances

with the following new reference:

IEC 60364-4-44:2007, Low-voltage electrical installations – Part 4-44: Protection for safety –

Protection against voltage disturbances and electromagnetic disturbances

IEC 60364-4-44:2007/AMD1:2015
Addition:
Add the following new normative reference:
IEC 61010-2-032, Safety requirements for electrical equipment for measurement, control, and
laboratory use – Part 2-032: Particular requirements for hand-held and hand-manipulated
current sensors for electrical test and measurement
3 Terms and definitions
This clause of Part 1 is applicable except as follows:
3.5 Safety terms
Replacement:
Replace the definition of 3.5.4 with the following new definition:
3.5.4
MAINS
low-voltage electricity supply system
Addition:
Add the following new definition:
3.5.101
MEASUREMENT CATEGORY
classification of testing and measuring circuits according to the type of MAINS CIRCUITS to
which they are intended to be connected

Note 1 to entry: MEASUREMENT CATEGORIES take into account OVERVOLTAGE CATEGORIES, short-circuit current
levels, the location in the building installation where the test or measurement is to be made, and some forms of
energy limitation or transient protection included in the building installation. See Annex AA for more information.
4 Tests
This Clause of Part 1 is applicable.
5 Marking and documentation
This clause of Part 1 is applicable except as follows:
5.1.5 TERMINALS, connections and operating devices
Addition:
– 10 – IEC 61010-2-030:2017 RLV © IEC 2017

Add the following new subclause:

5.1.5.101 Measuring circuit TERMINALS

5.1.5.101.1 General
Except as permitted in 5.1.5.101.4:

a) the value of the RATED voltage to earth of measuring circuit TERMINALS shall be marked,

and
b) the value of the RATED voltage or the RATED current, as applicable, of each pair or set of
measuring circuit TERMINALS that are intended to be used together shall be marked, and

c) the pertinent MEASUREMENT CATEGORY for each individual pair or set of measuring circuit
TERMINALS or symbol 14 of Table 1 shall be marked as specified in 5.1.5.101.2 and
5.1.5.101.3, if applicable.
NOTE 1 Measuring circuit TERMINALS are usually supplied in pairs or sets. Each pair or set of
TERMINALS may have a RATED voltage or a RATED current, or both, within that set, and each
individual TERMINAL may have a RATED voltage to earth. Some instruments may have a
measurement For some equipment, the RATED voltage (between TERMINALS) may be different
from the RATED voltage to earth. Markings should shall be clear to avoid misunderstanding.
Symbol 14 of Table 1 shall be marked if current measuring TERMINALS are not intended for
connection to current transformers without internal protection (see 101.2).
Markings shall be placed adjacent to the TERMINALS. However, if there is insufficient space (as
in multi-input equipment), the marking may be on the RATING plate or scale plate, or the
TERMINAL may be marked with symbol 14 of Table 1.
NOTE 2 For any set of measuring circuit TERMINALS, symbol 14 of Table 1 does not need to be
marked more than once, if it is close to the TERMINALS.
Conformity is checked by inspection and, if applicable, as specified in 5.1.5.101.2 and
5.1.5.101.3, taking the exceptions in 5.1.5.101.4 into account.
5.1.5.101.2 Measuring circuit TERMINALS RATED for MEASUREMENT CATEGORIES II, III or IV
The relevant MEASUREMENT CATEGORY shall be marked for measuring circuit TERMINALS RATED
for measurements within MEASUREMENT CATEGORIES II, III or IV. The MEASUREMENT CATEGORY
markings shall be “CAT II”, “CAT III” or “CAT IV” as applicable.
NOTE Marking more than one type of MEASUREMENT CATEGORY and its RATED voltage to earth

is permissible (see also 5.1.5.101.1, Note 1).
Conformity is checked by inspection.
5.1.5.101.3 Measuring circuit TERMINALS RATED for connection to voltages above the
levels of 6.3.1
Symbol 14 of Table 1 shall be marked for measuring circuit TERMINALS RATED for connection to
voltages above the levels of 6.3.1, but that are not RATED for measurements within
MEASUREMENT CATEGORIES II, III or IV (see also 5.4.1 bb)).
Conformity is checked by inspection.

5.1.5.101.4 Permanently connected, dedicated, or low voltage measuring circuit

TERMINALS
Measuring circuit TERMINALS do not need to be marked if:

a) they are intended to be permanently connected and not ACCESSIBLE (see 5.4.3 aa) and

bb)), or
b) they are dedicated only for connection to specific TERMINALS of other equipment, or

c) it is obvious from other indications that the RATED voltage is below the levels of 6.3.1.

NOTE Examples of acceptable indications that the inputs are intended to be less than below the levels of

6.3.1 include:
– the full scale deflection marking of a single-range indicating voltmeter or ammeter or maximum marking of
a multi-range multimeter;
– the maximum range marking of a voltage selector switch;
– a marked voltage or power RATING expressed in dB, mW or W, where the equivalent value, as explained in
the documentation, is below 33 30 V a.c.
Conformity is checked by inspection.
5.4.1 General
Addition:
Add the following new items to the list and a new paragraph:
aa) information about each relevant MEASUREMENT CATEGORY if the measuring circuit has a
RATING for MEASUREMENT CATEGORY II, III or IV (see 5.1.5.101.2);
bb) for measuring circuits that do not have a RATING for MEASUREMENT CATEGORY II, III or IV,
but could be misused by connection to such circuits, a warning not to use the equipment
for measurements on MAINS CIRCUITS, and a detailed RATING including TRANSIENT
OVERVOLTAGES (see AA.2.4 for more information).
NOTE Some equipment may have multiple MEASUREMENT CATEGORY RATINGS for the same
measuring circuit. For such equipment, the documentation needs to shall clearly identify the
MEASUREMENT CATEGORIES where the equipment is intended to be used and where it must not
be used.
5.4.3 Equipment installation
Addition:
Add the following new items to the list:

aa) for permanently connected measuring circuit TERMINALS intended for permanent
connection and that are RATED for MEASUREMENT CATEGORIES II, III or IV, information
regarding the MEASUREMENT CATEGORY, RATED maximum WORKING voltages or RATED
maximum currents, as applicable (see 5.1.5.101.2);
bb) for permanently connected measuring circuit TERMINALS intended for permanent
connection and that are not RATED for MEASUREMENT CATEGORIES II, III or IV, information
regarding the RATED maximum WORKING voltages, RATED maximum currents, and RATED
maximum TRANSIENT OVERVOLTAGES as applicable (see 5.1.5.101.4).
6 Protection against electric shock
This clause of Part 1 is applicable except as follows:

– 12 – IEC 61010-2-030:2017 RLV © IEC 2017

6.1.2 Exceptions
Add the following new item to the list:

aa) locking or screw-held type measuring TERMINALS, including TERMINALS which do not
require the use of a TOOL.
6.5.2.1 General
Replacement:
Replace the conformity statement with the following:

Conformity is checked as specified in 6.5.2.2 to 6.5.2.6 and 6.5.2.101.
6.5.2.3 PROTECTIVE CONDUCTOR TERMINAL
Replacement:
Replace h) 2) with the following:
h) 2) the PROTECTIVE BONDING shall not be interrupted by any switching or interrupting
device. Devices used for indirect bonding in testing and measuring circuits (see
6.5.2.101) are permitted to be part of the PROTECTIVE BONDING.
Addition:
Add the following new subclause and figure:
6.5.2.101 Indirect bonding for testing and measuring circuits
Indirect bonding establishes a connection between the PROTECTIVE CONDUCTOR TERMINAL and
ACCESSIBLE conductive parts if these become HAZARDOUS LIVE as a result of a fault.
Devices to establish indirect bonding are the following:
a) Voltage limiting devices which become conductive when the voltage across them exceeds
the relevant levels of 6.3.2 a), with overcurrent protection to prevent breakdown of the
device. The duration versus the current shall not exceed the levels of Figure 101.
Conformity is checked by connecting the ACCESSIBLE conductive parts to the MAINS supply
TERMINALS while the equipment is connected to the MAINS supply as maximum HAZARDOUS
LIVE voltage according to the equipment RATINGS while the equipment is operated in
NORMAL USE. The voltage current between the ACCESSIBLE conductive parts and the

PROTECTIVE CONDUCTOR TERMINAL shall not exceed the relevant levels of 6.3.2 a) for more
than 0,2 s is measured with the circuit of Figure A.1.
b) Voltage-sensitive tripping devices which interrupt all poles of the MAINS supply or the
HAZARDOUS LIVE voltage source, and connect the ACCESSIBLE conductive parts to the
PROTECTIVE CONDUCTOR TERMINAL whenever the voltage across them reaches the relevant
levels of 6.3.2 a). The tripping duration versus the current shall not exceed the levels of
Figure 101.
Conformity is checked by applying successively the relevant voltage level of 6.3.2 a) and
the maximum RATED voltage between the ACCESSIBLE conductive parts and the PROTECTIVE
CONDUCTOR TERMINAL. The tripping action shall take place within 0,2 s. The current
between the ACCESSIBLE conductive parts and the PROTECTIVE CONDUCTOR TERMINAL is
measured with the circuit of Figure A.1.
Voltage limiting devices or voltage-sensitive tripping devices as defined in a) and b), shall
have at least the voltage and current RATINGS of the measuring TERMINALS.

Conformity is checked by inspection.

10 000
1 000
A B
0,1
1 10 100 1 000 10 000
I (mA)
IEC
Key
A Current a.c. (mA)
B Current d.c. (mA)
NOTE This figure is based on IEC TS 60479-1:2005, Figures 20 and 22, and IEC TS 60479-2:2007, Figure 20.
Figure 101 – Duration of current flow versus body current
for a.c. and d.c. currents
6.6 Connections to external circuits
Addition:
Add the following new subclauses:
6.6.101 Measuring circuit TERMINALS
The conductive parts of each unmated measuring circuit TERMINAL which could become
HAZARDOUS LIVE when the maximum highest RATED voltage is applied to other measuring
circuit TERMINALS on the equipment shall be separated by at least:
a) for TERMINALS with voltage RATING up to 1 000 V a.c. or 1 500 V d.c., the applicable
CLEARANCE and CREEPAGE DISTANCE of Table 101 from the closest approach of the test
finger touching the external parts of the TERMINAL in the least favourable position (see
Figure 1),
t (ms)
– 14 – IEC 61010-2-030:2017 RLV © IEC 2017

b) for TERMINALS with voltage RATING exceeding 1 000 V a.c. or 1 500 V d.c., 2,8 mm for the

CLEARANCE and CREEPAGE DISTANCE from the closest approach of the test finger touching

the external parts of the TERMINAL in the least favourable position.

Additionally, TERMINALS with voltage RATING exceeding 1 000 V a.c. or 1 500 V d.c. shall

withstand the voltage test of 6.8 with a test voltage equal to the RATED voltage of the

TERMINAL multiplied by 1,25 applied between the closest approach of the test finger

touching the external parts of the TERMINAL in the least favourable position and the other

measuring circuit TERMINALS.
EXAMPLE For a 4 000 V r.m.s. RATED voltage, the test voltage is 5 000 V r.m.s. (7 070 V peak). The

calculated clearance is 13,1 mm according to D in Table K.15. For homogeneous fields, a lower CLEARANCE
value can be achieved by testing (see IEC 60664-1 for more information about homogeneous fields).

Table 101 – CLEARANCES and CREEPAGE DISTANCES for measuring circuit TERMINALS with
HAZARDOUS LIVE conductive parts up to 1 000 V a.c. or 1 500 V d.c
CLEARANCE and CREEPAGE
Voltage on conductive parts of TERMINAL
DISTANCE
V a.c. r.m.s. and V d.c. V d.c. mm
≥ 33 > 30 ≤ 300 ≥70 ≤ 414 0,8
> 300 ≤ 600 >414 ≤ 848 1,0
2,6
> 600 ≤ 1 000 >848 ≤ 1 414
a
> 1 000 ≤ 1 500 2,8
NOTE Values are determined by calculation for REINFORCED INSULATION. Transients are not taken
into account. The values in this table are not applicable to voltages below HAZARDOUS LIVE voltages

(see 6.3.1 a)).
a
Only for d.c. voltage.
For WET LOCATIONS, there are no CLEARANCE and CREEPAGE DISTANCE requirements for
voltages between 16 V a.c. r.m.s. and 30 V a.c. r.m.s., or between 35 V d.c. and 60 V d.c.,
but conductive parts of unmated measuring circuit TERMINAL shall not be ACCESSIBLE.
Annex CC provides information regarding the recommended dimensions of 4 mm TERMINALS.
Conformity is checked by inspection, by the determination of ACCESSIBLE parts, by
measurement of the applicable CLEARANCES and CREEPAGE DISTANCES, and if applicable, by
the voltage test of 6.8.
6.6.102 Specialized measuring circuit TERMINALS
Components, sensors, and devices intended to be connected to specialized measuring circuit

TERMINALS shall not be both ACCESSIBLE and HAZARDOUS LIVE, in either NORMAL CONDITION or
SINGLE-FAULT CONDITION, even when the maximum highest RATED voltage is applied to any
other measuring circuit TERMINAL.
NOTE These specialized TERMINALS include, but are not limited to, TERMINALS for semiconductor measuring
functions, capacitance measurements, and thermocouple sockets.
Conformity is checked by inspection and measurement. Components, sensors, and devices
intended to be connected to specialized measuring circuit TERMINALS are connected. The
measurements of 6.3 are made to establish that the levels of 6.3.1 and 6.3.2 are not
exceeded when each of the following voltages is applied to each other measuring circuit
TERMINAL, if applicable:
a) maximum highest RATED a.c. voltage at any RATED MAINS frequency;
b) maximum highest RATED d.c. voltage;
c) maximum highest RATED a.c. voltage at the related maximum RATED measurement
frequency.
6.7.1.3 CREEPAGE DISTANCES
Addition:
Add the following new paragraph after the third paragraph:

For HAND-HELD EQUIPMENT not powered from the MAINS or the measuring circuit, CREEPAGE

DISTANCES are allowed to be according to material group I for all insulating materials.

6.7.1.5 Requirements for insulation according to type of circuit

Replacement:
Replace the text with the following:
Requirements for insulation in particular types of circuits are specified as follows:
a) in 6.7.2 for MAINS CIRCUITS of OVERVOLTAGE CATEGORY II with a nominal supply voltage up
to 300 V;
NOTE 1 See Annex I for nominal voltages of MAINS supplies.
b) in 6.7.3 for secondary circuits separated from the circuits in a) only by means of a
transformer;
c) in Clause K.1 for MAINS CIRCUITS of OVERVOLTAGE CATEGORY III or IV or for OVERVOLTAGE
CATEGORY II over 300 V;
d) in Clause K.2 for secondary circuits separated from the circuits in c) only by means of a
transformer;
e) in Clause K.3 for circuits that have one or more of the following characteristics:
1) the maximum possible TRANSIENT OVERVOLTAGE is limited by the supply source or
within the equipment to a known level below the level assumed for the MAINS CIRCUIT;
2) the maximum possible TRANSIENT OVERVOLTAGE is above the level assumed for the
MAINS CIRCUIT;
3) the WORKING VOLTAGE is the sum of voltages from more than one circuit, or is a mixed
voltage;
4) the WORKING VOLTAGE includes a recurring peak voltage that may include a periodic
non-sinusoidal waveform or a non-periodic waveform that occurs with some regularity;
5) the WORKING VOLTAGE has a frequency above 30 kHz;
6) the circuit is a measuring circuit where MEASUREMENT CATEGORIES do not apply;
f) in Clause K.101 for measuring circuits of MEASUREMENT CATEGORIES II, III and IV.

NOTE 2 These requirements are illustrated in the flowchart of Annex DD.
NOTE 3 See Clause K.3 for requirements for switching circuits such as a switching power supply.
NOTE 4 The assumed transient level for MAINS is defined in IEC 60364-4-44:2007/AMD1:2015, Table 443.2.
6.9 Constructional requirements for protection against electric shock
Add a new subclause:
6.9.101 Over-range indication
If a HAZARD could arise from an OPERATOR'S reliance on the value (for example, voltage)
displayed by the equipment, the display shall give an unambiguous indication whenever the
value is above the maximum positive value or below the minimum negative value of the range
to which the equipment is set.

– 16 – IEC 61010-2-030:2017 RLV © IEC 2017

NOTE Examples of ambiguous indications include the following, unless there is a separate unambiguous

indication of an over-range value:

a) analogue meters with stops at the exact ends of the range;

b) digital meters which show a low value when the true value is above the range maximum (for example

1 001,5 V displayed as 001,5 V);

c) chart recorders which print a trace at the edge of the chart, thus indicating a value at the range maximum
when the true value is higher.

Conformity is checked by inspection and by provoking an over-range value.

7 Protection against mechanical HAZARDS

This clause of Part 1 is applicable.
8 Resistance to mechanical stresses
This clause of Part 1 is applicable.
9 Protection against the spread of fire
This clause of Part 1 is applicable.
10 Equipment temperature limits and resistance to heat
This clause of Part 1 is applicable.
11 Protection against HAZARDS from fluids and solid foreign objects
This clause of Part 1 is applicable.
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure
This clause of Part 1 is applicable.
13 Protection against liberated gases and substances, explosion and implosion

This clause of Part 1 is applicable.
14 Components and subassemblies
This clause of Part 1 is applicable except as follows:
Addition:
Add the following new subclauses:

14.101 Circuits or components used as to limit TRANSIENT OVERVOLTAGE limiting devices

in measuring circuits used to measure MAINS

If control of TRANSIENT OVERVOLTAGES is employed in a measuring circuit used to measure

MAINS, any the overvoltage limiting component or circuit shall have adequate strength to limit

likely TRANSIENT OVERVOLTAGES.

Conformity is checked by applying five positive and five negative impulses with the applicable

impulse withstand voltage of Table 102, spaced up to 1 min apart, from a hybrid impulse
generator (see IEC 61180-1). The generator shall produces an open-circuit voltage waveform

of 1,2/50 µs, a short-circuit current waveform of 8/20 µs, with an output impedance (peak

open-circuit voltage divided by peak short-circuit current) of 2 Ω for MEASUREMENT CATEGORIES

III and IV or 12 Ω for MEASUREMENT CATEGORIES II. Resistance may be added in series if
needed to raise the impedance. The test impulse is applied while the circuit is working under
conditions of normal use, in combination with the mains. The voltage is the maximum rated
line-to-neutral voltage of the mains being measured.
The test voltage is applied while the circuit is operating under conditions of NORMAL USE, in
combination with the MAINS voltage between each pair of TERMINALS used to measure MAINS
where voltage-limiting devices components or circuits are present.
No HAZARD shall arise in the event that the component ruptures or overheats during the test. If
a rupture occurs, no part of the component shall bridge safety-relevant insulation. If the
component overheats, it shall not heat other materials to their self-ignition points. Tripping the
circuit breaker of the MAINS installation is an indication of failure.
The MAINS voltage is the maximum RATED line-to-neutral voltage of the MAINS being measured.
For measuring circuits RATED for MAINS line-to-neutral voltages above 400 V a.c. r.m.s. or d.c.,
the test may be performed with an available voltage source that has a line-to-neutral voltage
of at least 400 V a.c. r.m.s. or d.c. The voltage source does not, in this case, need to match
the measuring circuit RATING, but circuits RATED for a.c. are tested with an a.c. source, and
circuits RATED for d.c. are tested with a d.c. source.
NOTE This test can be extremely hazardous. Explosion shields and other provisions can be used to protect
personnel performing the test.
The overvoltage limiting component or circuit shall not rupture or overheat during the test. If
the results of the test are questionable or inconclusive, the test is to be repeated two more
times.
Table 102 – Impulse withstand voltages

Nominal a.c. r.m.s
Impulse withstand voltage
line-to-neutral or d.c.
V
voltage of MAINS
being measured
MEASUREMENT MEASUREMENT MEASUREMENT
V
CATEGORY II CATEGORY III CATEGORY IV
500 800 1 500
≤ 50
> 50 ≤ 100 800 1 500 2 500
> 100 ≤ 150 1 500 2 500 4 000
2 500 4 000 6 000
> 150 ≤ 300
4 000 6 000 8 000
> 300 ≤ 600
> 600 ≤ 1 000 6 000 8 000 12 000
a
8 000 10 000 15 000
> 1 000 ≤ 1 500
a
Only for d.c. voltage.
– 18 – IEC 61010-2-030:2017 RLV © IEC 2017

14.102 Probe assemblies and accessories

Probe assemblies and accessories within the scope of IEC 61010-031, and current sensors

within the scope of IEC 61010-2-032 shall meet the requirements thereof.

Conformity is checked by inspection.

15 Protection by interlocks
This clause of Part 1 is applicable.

16 HAZARDS resulting from application
This clause of Part 1 is applicable.
17 RISK assessment
This clause of Part 1 is applicable.
Addition:
Add the following new clause:
101 Measuring circuits
101.1 General
The equipment shall provide protection against HAZARDS resulting from NORMAL USE and
REASONABLY FORESEEABLE MISUSE of measuring circuits, as specified below.
a) If a HAZARD could result, a current measuring circuit shall not interrupt the circuit being
measured during range changing, or during the use of current transformers without
internal protection (see 101.2).
b) An elec
...

IEC 61010-2-030 ®
Edition 2.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety requirements for electrical equipment for measurement, control, and
laboratory use –
Part 2-030: Particular requirements for equipment having testing or measuring
circuits
Exigences de sécurité pour appareils électriques de mesurage, de régulation
et de laboratoire –
Partie 2-030: Exigences particulières pour les appareils équipés de circuits
d'essai ou de mesure
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.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
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 corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and

CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: [e-mail].
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.

Catalogue IEC - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
Application autonome pour consulter tous les renseignements
Le premier dictionnaire en ligne de termes électroniques et
bibliographiques sur les Normes internationales,
électriques. Il contient 20 000 termes et définitions en anglais
Spécifications techniques, Rapports techniques et autres
et en français, ainsi que les termes équivalents dans 16
documents de l'IEC. Disponible pour PC, Mac OS, tablettes
langues additionnelles. Egalement appelé Vocabulaire
Android et iPad.
Electrotechnique International (IEV) en ligne.

Recherche de publications IEC - www.iec.ch/searchpub
Glossaire IEC - std.iec.ch/glossary
65 000 entrées terminologiques électrotechniques, en anglais
La recherche avancée permet de trouver des publications IEC
en utilisant différents critères (numéro de référence, texte, et en français, extraites des articles Termes et Définitions des
comité d’études,…). Elle donne aussi des informations sur les publications IEC parues depuis 2002. Plus certaines entrées
projets et les publications remplacées ou retirées. antérieures extraites des publications des CE 37, 77, 86 et

CISPR de l'IEC.
IEC Just Published - webstore.iec.ch/justpublished

Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications IEC. Just
Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur cette
Disponible en ligne et aussi une fois par mois par email. publication ou si vous avez des questions contactez-nous:
[e-mail].
IEC 61010-2-030 ®
Edition 2.0 2017-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ

Safety requirements for electrical equipment for measurement, control, and

laboratory use –
Part 2-030: Particular requirements for equipment having testing or measuring

circuits
Exigences de sécurité pour appareils électriques de mesurage, de régulation

et de laboratoire –
Partie 2-030: Exigences particulières pour les appareils équipés de circuits

d'essai ou de mesure
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.080; 71.040.10 ISBN 978-2-8322-3791-5

– 2 – IEC 61010-2-030:2017 © IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope and object . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Tests . 9
5 Marking and documentation . 9
6 Protection against electric shock . 11
7 Protection against mechanical HAZARDS . 15
8 Resistance to mechanical stresses . 15
9 Protection against the spread of fire . 15
10 Equipment temperature limits and resistance to heat . 16
11 Protection against HAZARDS from fluids and solid foreign objects . 16
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure . 16
13 Protection against liberated gases and substances, explosion and implosion . 16
14 Components and subassemblies . 16
15 Protection by interlocks . 17
16 HAZARDS resulting from application . 17
17 RISK assessment . 17
101 Measuring circuits . 17
Annexes . 23
Annex K (normative) Insulation requirements not covered by 6.7 . 23
Annex L (informative) Index of defined terms . 30
Annex AA (normative) MEASUREMENT CATEGORIES . 31
Annex BB (informative) HAZARDS pertaining to measurements performed in certain
environments . 33
Annex CC (informative) 4 mm “banana” TERMINALS . 36
Annex DD (informative) Flowchart for insulation according to the type of circuit . 38
Bibliography . 41

Figure 101 – Duration of current flow versus body current for a.c. and d.c. currents. 13
Figure AA.1 – Example to identify the locations of measuring circuits . 32
Figure CC.1 – Recommended dimensions of 4 mm TERMINALS . 37
Figure DD.1 – Requirements for CLEARANCE, CREEPAGE DISTANCE and solid insulation . 40

Table 101 – CLEARANCES and CREEPAGE DISTANCES for measuring circuit TERMINALS
with HAZARDOUS LIVE conductive parts up to 1 000 V a.c. or 1 500 V d.c . 14
Table 102 – Impulse voltages . 17
Table K.101 – CLEARANCES for measuring circuits of MEASUREMENT CATEGORIES II, III
and IV . 24
Table K.102 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY II . 25

Table K.103 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY III . 26
Table K.104 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY IV . 26
Table K.105 – Test voltages for testing long term stress of solid insulation in
measuring circuits . 26
Table K.106 – Maximum TRANSIENT OVERVOLTAGES . 29
Table AA.1 – Characteristics of MEASUREMENT CATEGORIES . 32

– 4 – IEC 61010-2-030:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-030: Particular requirements for equipment
having testing or measuring circuits

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 61010-2-030 has been prepared by IEC technical committee 66:
Safety of measuring, control and laboratory equipment.
It has the status of a group safety publication in accordance with IEC Guide 104.
This second edition cancels and replaces the first edition published in 2010. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Reference to IEC 61010-031 for probe assemblies and IEC 61010-032 for current sensors
has been added.
b) Indirect bonding for testing and measuring circuits has been modified, in particular to take
into account the duration of current flow versus body current for a.c. and d.c. currents
according to IEC TS 60479-1 and IEC TS 60479-2.
c) CLEARANCE and CREEPAGE DISTANCE for WET LOCATIONS and for measuring circuit TERMINAL
exceeding 1 000 V a.c. or d.c have been specified.
d) The voltage source for testing overvoltage limiting component or circuit may be limited to
400 V.
e) Requirements against TRANSIENT OVERVOLTAGES for MAINS voltage measuring circuits have
been added.
f) Requirements for measuring circuits from 1 000 V d.c. to 1 500 V d.c. have been added.
g) The corrigendum has been included in Tables K.102 to K.104.
h) Requirements for reduction of TRANSIENT OVERVOLTAGES have been modified.
i) An informative Annex CC about the dimensions of banana TERMINALS has been added.
j) Flowchart for insulation according to the type of circuit has been added in a new Annex
DD.
The text of this standard is based on the following documents:
FDIS Report on voting
66/613/FDIS 66/621/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 Part 2-030 is to be used in conjunction with the latest edition of IEC 61010-1. It was
established on the basis of the third edition (2010) of IEC 61010-1, including its amendment 1
(2016).
This Part 2-030 supplements or modifies the corresponding clauses in IEC 61010-1 so as to
convert that publication into the IEC standard: Particular requirements for equipment having
testing or measuring circuits.
Where a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies
as far as is reasonable. Where this part states “addition”, “modification”, “replacement”, or
“deletion” the relevant requirement, test specification or note in Part 1 should be adapted
accordingly.
In this standard:
a) the following print types are used:
– requirements: in roman type;
NOTES: in small roman type;
–
– conformity and test: in italic type;
– terms used throughout this standard which have been defined in Clause 3: SMALL
ROMAN CAPITALS;
b) subclauses, figures, tables and notes which are additional to those in Part 1 are numbered
starting from 101. Additional annexes are lettered starting from AA and additional list
items are lettered from aa).
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 6 – IEC 61010-2-030:2017 © IEC 2017
A list of all parts of the IEC 61010 series, under the general title Safety requirements for
electrical equipment for measurement, control, and laboratory use, can be found on the IEC
website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website 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.
INTRODUCTION
IEC 61010-1 specifies the safety requirements that are generally applicable to all equipment
within its scope. For certain types of equipment, the requirements of IEC 61010-1 and its
amendment will be supplemented or modified by the special requirements of one, or more
than one, particular Part 2 of the standard which are read in conjunction with the Part 1
requirements.
This Part 2-030 specifies the safety requirements for equipment with testing or measuring
circuits which are connected for test or measurement purposes to devices or circuits outside
the measurement equipment itself.
Part 2-032 specifies the safety requirements for HAND-HELD and hand-manipulated current
sensors (see Clause 1 of Part 2-032). Requirements of Part 2-030 have been included in Part
2-032. Equipment within the scopes of Part 2-030 and Part 2-032 are considered to be
covered by the requirements of Part 2-032.
Part 2-033 specifies the safety requirements for HAND-HELD MULTIMETERS and other METERS
that have a primary purpose of measuring voltage on a live MAINS. Requirements of Part 2-030
have been included in Part 2-033. Parts of equipment within the scopes of Part 2-030 and
Part 2-033 are considered to be covered by the requirements of Part 2-033.
Part 2-034 specifies the safety requirements for measurement equipment for insulation
resistance and test equipment for electric strength which are connected to units, lines or
circuits for test or measurement purposes. Requirements of Part 2-030 have been included in
Part 2-034. Equipment within the scopes of Part 2-030 and Part 2-034 are considered to be
covered by the requirements of Part 2-034.
However, for equipment within the scope of Part 2-032, Part 2-033 and Part 2-034, the
standards are read in conjunction.

– 8 – IEC 61010-2-030:2017 © IEC 2017
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-030: Particular requirements for equipment
having testing or measuring circuits

1 Scope and object
This clause of Part 1 is applicable except as follows:
1.1.1 Equipment included in scope
Replacement:
Replace the text with the following:
This group safety publication is primarily intended to be used as a product safety standard for
the products mentioned in the scope, but shall also be used by technical committees in the
preparation of their publications for products similar to those mentioned in the scope of this
standard, in accordance with the principles laid down in IEC Guide 104 and
lSO/lEC Guide 51.
This part of IEC 61010 specifies safety requirements for equipment having testing or
measuring circuits which are connected for test or measurement purposes to devices or
circuits outside the measurement equipment itself.
These include measuring circuits which are part of electrical test and measurement
equipment, laboratory equipment, or process control equipment. The existence of these
circuits in equipment requires additional protective means between the circuit and an
OPERATOR.
NOTE These testing and measuring circuits can, for example:
– measure voltages in circuits of other equipment,
– measure temperature of a separate device via a thermocouple,
– measure force on a separate device via a strain gauge,
– inject a voltage onto a circuit to analyse a new design.
Equipment having these testing and measuring circuits may be intended for performing tests
and measurements on hazardous conductors, including MAINS conductors and
telecommunication network conductors. See Annex BB for considerations of HAZARDS involved
in various tests and measurements.
2 Normative references
This clause of Part 1 is applicable except as follows:
Replacement:
Replace
IEC 60364-4-44, Low-voltage electrical installations – Part 4-44: Protection for safety –
Protection against voltage disturbances and electromagnetic disturbances

with the following new reference:
IEC 60364-4-44:2007, Low-voltage electrical installations – Part 4-44: Protection for safety –
Protection against voltage disturbances and electromagnetic disturbances
IEC 60364-4-44:2007/AMD1:2015
Addition:
Add the following new normative reference:
IEC 61010-2-032, Safety requirements for electrical equipment for measurement, control, and
laboratory use – Part 2-032: Particular requirements for hand-held and hand-manipulated
current sensors for electrical test and measurement
3 Terms and definitions
This clause of Part 1 is applicable except as follows:
3.5 Safety terms
Replacement:
Replace the definition of 3.5.4 with the following new definition:
3.5.4
MAINS
low-voltage electricity supply system
Addition:
Add the following new definition:
3.5.101
MEASUREMENT CATEGORY
classification of testing and measuring circuits according to the type of MAINS to which they
are intended to be connected
Note 1 to entry: MEASUREMENT CATEGORIES take into account OVERVOLTAGE CATEGORIES, short-circuit current
levels, the location in the building installation where the test or measurement is to be made, and some forms of
energy limitation or transient protection included in the building installation. See Annex AA for more information.
4 Tests
This Clause of Part 1 is applicable.
5 Marking and documentation
This clause of Part 1 is applicable except as follows:
5.1.5 TERMINALS, connections and operating devices
Addition:
Add the following new subclause:

– 10 – IEC 61010-2-030:2017 © IEC 2017
5.1.5.101 Measuring circuit TERMINALS
5.1.5.101.1 General
Except as permitted in 5.1.5.101.4:
a) the value of the RATED voltage to earth of measuring circuit TERMINALS shall be marked,
and
b) the value of the RATED voltage or the RATED current, as applicable, of each pair or set of
measuring circuit TERMINALS that are intended to be used together shall be marked, and
c) the pertinent MEASUREMENT CATEGORY for each individual pair or set of measuring circuit
TERMINALS or symbol 14 of Table 1 shall be marked as specified in 5.1.5.101.2 and
5.1.5.101.3, if applicable.
Measuring circuit TERMINALS are usually supplied in pairs or sets. Each pair or set of
TERMINALS may have a RATED voltage or a RATED current, or both, within that set, and each
individual TERMINAL may have a RATED voltage to earth. For some equipment, the RATED
voltage between TERMINALS may be different from the RATED voltage to earth. Markings shall
be clear to avoid misunderstanding.
Symbol 14 of Table 1 shall be marked if current measuring TERMINALS are not intended for
connection to current transformers without internal protection (see 101.2).
Markings shall be placed adjacent to the TERMINALS. However, if there is insufficient space (as
in multi-input equipment), the marking may be on the RATING plate or scale plate, or the
TERMINAL may be marked with symbol 14 of Table 1.
For any set of measuring circuit TERMINALS, symbol 14 of Table 1 does not need to be marked
TERMINALS.
more than once, if it is close to the
Conformity is checked by inspection and, if applicable, as specified in 5.1.5.101.2 and
5.1.5.101.3, taking the exceptions in 5.1.5.101.4 into account.
5.1.5.101.2 Measuring circuit TERMINALS RATED for MEASUREMENT CATEGORIES II, III or IV
The relevant MEASUREMENT CATEGORY shall be marked for measuring circuit TERMINALS RATED
for measurements within MEASUREMENT CATEGORIES II, III or IV. The MEASUREMENT CATEGORY
markings shall be “CAT II”, “CAT III” or “CAT IV” as applicable.
Marking more than one type of MEASUREMENT CATEGORY and its RATED voltage to earth is
permissible.
Conformity is checked by inspection.
5.1.5.101.3 Measuring circuit TERMINALS RATED for connection to voltages above the
levels of 6.3.1
Symbol 14 of Table 1 shall be marked for measuring circuit TERMINALS RATED for connection to
voltages above the levels of 6.3.1, but that are not RATED for measurements within
MEASUREMENT CATEGORIES II, III or IV (see also 5.4.1 bb)).
Conformity is checked by inspection.
5.1.5.101.4 Permanently connected, dedicated, or low voltage measuring circuit
TERMINALS
Measuring circuit TERMINALS do not need to be marked if:

a) they are intended to be permanently connected and not ACCESSIBLE (see 5.4.3 aa) and
bb)), or
b) they are dedicated only for connection to specific TERMINALS of other equipment, or
c) it is obvious from other indications that the RATED voltage is below the levels of 6.3.1.
NOTE Examples of acceptable indications that the inputs are intended to be below the levels of 6.3.1 include:
– the full scale deflection marking of a single-range indicating voltmeter or ammeter or maximum marking of
a multi-range multimeter;
– the maximum range marking of a voltage selector switch;
– a marked voltage or power RATING expressed in dB, mW or W, where the equivalent value, as explained in
the documentation, is below 30 V a.c.
Conformity is checked by inspection.
5.4.1 General
Addition:
Add the following new items to the list and a new paragraph:
aa) information about each relevant MEASUREMENT CATEGORY if the measuring circuit has a
RATING for MEASUREMENT CATEGORY II, III or IV (see 5.1.5.101.2);
bb) for measuring circuits that do not have a RATING for MEASUREMENT CATEGORY II, III or IV,
but could be misused by connection to such circuits, a warning not to use the equipment
for measurements on MAINS, and a detailed RATING including TRANSIENT OVERVOLTAGES
(see AA.2.4 for more information).
Some equipment may have multiple MEASUREMENT CATEGORY RATINGS for the same measuring
circuit. For such equipment, the documentation shall clearly identify the MEASUREMENT
CATEGORIES where the equipment is intended to be used and where it must not be used.
5.4.3 Equipment installation
Addition:
Add the following new items to the list:
aa) for measuring circuit TERMINALS intended for permanent connection and that are RATED
for MEASUREMENT CATEGORIES II, III or IV, information regarding the MEASUREMENT
CATEGORY, RATED voltages or RATED currents, as applicable (see 5.1.5.101.2);
bb) for measuring circuit TERMINALS intended for permanent connection and that are not
RATED for MEASUREMENT CATEGORIES II, III or IV, information regarding the RATED
voltages, RATED currents, and RATED TRANSIENT OVERVOLTAGES as applicable (see
5.1.5.101.4).
6 Protection against electric shock
This clause of Part 1 is applicable except as follows:
6.1.2 Exceptions
Add the following new item to the list:
aa) locking or screw-held type measuring TERMINALS, including TERMINALS which do not
require the use of a TOOL.
6.5.2.1 General
Replacement:
– 12 – IEC 61010-2-030:2017 © IEC 2017
Replace the conformity statement with the following:
Conformity is checked as specified in 6.5.2.2 to 6.5.2.6 and 6.5.2.101.
6.5.2.3 PROTECTIVE CONDUCTOR TERMINAL
Replacement:
Replace h) 2) with the following:
h) 2) the PROTECTIVE BONDING shall not be interrupted by any switching or interrupting
device. Devices used for indirect bonding in testing and measuring circuits (see
6.5.2.101) are permitted to be part of the PROTECTIVE BONDING.
Addition:
Add the following new subclause and figure:
6.5.2.101 Indirect bonding for testing and measuring circuits
Indirect bonding establishes a connection between the PROTECTIVE CONDUCTOR TERMINAL and
ACCESSIBLE conductive parts if these become HAZARDOUS LIVE as a result of a fault.
Devices to establish indirect bonding are the following:
a) Voltage limiting devices which become conductive when the voltage across them exceeds
the relevant levels of 6.3.2 a), with overcurrent protection to prevent breakdown of the
device. The duration versus the current shall not exceed the levels of Figure 101.
Conformity is checked by connecting the ACCESSIBLE conductive parts to the maximum
HAZARDOUS LIVE voltage according to the equipment RATINGS while the equipment is
operated in NORMAL USE. The current between the ACCESSIBLE conductive parts and the
PROTECTIVE CONDUCTOR TERMINAL is measured with the circuit of Figure A.1.
b) Voltage-sensitive tripping devices which interrupt all poles of the MAINS supply or the
HAZARDOUS LIVE voltage source, and connect the ACCESSIBLE conductive parts to the
PROTECTIVE CONDUCTOR TERMINAL whenever the voltage across them reaches the relevant
levels of 6.3.2 a). The tripping duration versus the current shall not exceed the levels of
Figure 101.
Conformity is checked by applying successively the relevant voltage level of 6.3.2 a) and
the maximum RATED voltage between the ACCESSIBLE conductive parts and the PROTECTIVE
CONDUCTOR TERMINAL. The current between the ACCESSIBLE conductive parts and the
PROTECTIVE CONDUCTOR TERMINAL is measured with the circuit of Figure A.1.
Voltage limiting devices or voltage-sensitive tripping devices as defined in a) and b), shall
have at least the voltage and current RATINGS of the measuring TERMINALS.
Conformity is checked by inspection.

10 000
1 000
A B
0,1
1 10 100 1 000 10 000
I (mA)
IEC
Key
A Current a.c. (mA)
B Current d.c. (mA)
NOTE This figure is based on IEC TS 60479-1:2005, Figures 20 and 22, and IEC TS 60479-2:2007, Figure 20.
Figure 101 – Duration of current flow versus body current
for a.c. and d.c. currents
6.6 Connections to external circuits
Addition:
Add the following new subclauses:
6.6.101 Measuring circuit TERMINALS
The conductive parts of each unmated measuring circuit TERMINAL which could become
HAZARDOUS LIVE when the highest RATED voltage is applied to other measuring circuit
TERMINALS on the equipment shall be separated by at least:
a) for TERMINALS with voltage RATING up to 1 000 V a.c. or 1 500 V d.c., the applicable
CLEARANCE and CREEPAGE DISTANCE of Table 101 from the closest approach of the test
finger touching the external parts of the TERMINAL in the least favourable position (see
Figure 1),
b) for TERMINALS with voltage RATING exceeding 1 000 V a.c. or 1 500 V d.c., 2,8 mm for the
CLEARANCE and CREEPAGE DISTANCE from the closest approach of the test finger touching
the external parts of the TERMINAL in the least favourable position.
t (ms)
– 14 – IEC 61010-2-030:2017 © IEC 2017
Additionally, TERMINALS with voltage RATING exceeding 1 000 V a.c. or 1 500 V d.c. shall
withstand the voltage test of 6.8 with a test voltage equal to the RATED voltage of the
TERMINAL multiplied by 1,25 applied between the closest approach of the test finger
touching the external parts of the TERMINAL in the least favourable position and the other
measuring circuit TERMINALS.
EXAMPLE For a 4 000 V r.m.s. RATED voltage, the test voltage is 5 000 V r.m.s. (7 070 V peak). The
calculated clearance is 13,1 mm according to D in Table K.15. For homogeneous fields, a lower CLEARANCE
value can be achieved by testing (see IEC 60664-1 for more information about homogeneous fields).
Table 101 – CLEARANCES and CREEPAGE DISTANCES for measuring circuit TERMINALS with
HAZARDOUS LIVE conductive parts up to 1 000 V a.c. or 1 500 V d.c
Voltage on conductive parts of
CLEARANCE and CREEPAGE DISTANCE
TERMINAL
V a.c. r.m.s. and V d.c. mm
0,8
> 30 ≤ 300
1,0
> 300 ≤ 600
> 600 ≤ 1 000 2,6
a
2,8
> 1 000 ≤ 1 500
NOTE The values in this table are not applicable to voltages below HAZARDOUS

LIVE voltages (see 6.3.1 a)).
a
Only for d.c. voltage.
For WET LOCATIONS, there are no CLEARANCE and CREEPAGE DISTANCE requirements for
voltages between 16 V a.c. r.m.s. and 30 V a.c. r.m.s., or between 35 V d.c. and 60 V d.c.,
but conductive parts of unmated measuring circuit TERMINAL shall not be ACCESSIBLE.
Annex CC provides information regarding the recommended dimensions of 4 mm TERMINALS.
Conformity is checked by inspection, by the determination of ACCESSIBLE parts, by
measurement of the applicable CLEARANCES and CREEPAGE DISTANCES, and if applicable, by
the voltage test of 6.8.
6.6.102 Specialized measuring circuit TERMINALS
Components, sensors, and devices intended to be connected to specialized measuring circuit
TERMINALS shall not be both ACCESSIBLE and HAZARDOUS LIVE, in either NORMAL CONDITION or
SINGLE-FAULT CONDITION, even when the highest RATED voltage is applied to any other
measuring circuit TERMINAL.
NOTE These specialized TERMINALS include, but are not limited to, TERMINALS for semiconductor measuring
functions, capacitance measurements, and thermocouple sockets.
Conformity is checked by inspection and measurement. Components, sensors, and devices
intended to be connected to specialized measuring circuit TERMINALS are connected. The
measurements of 6.3 are made to establish that the levels of 6.3.1 and 6.3.2 are not
exceeded when each of the following voltages is applied to each other measuring circuit
TERMINAL, if applicable:
a) highest RATED a.c. voltage at any RATED MAINS frequency;
b) highest RATED d.c. voltage;
c) highest RATED a.c. voltage at the related maximum RATED measurement frequency.
6.7.1.3 CREEPAGE DISTANCES
Addition:
Add the following new paragraph after the third paragraph:
For HAND-HELD EQUIPMENT not powered from the MAINS or the measuring circuit, CREEPAGE
DISTANCES are allowed to be according to material group I for all insulating materials.
6.7.1.5 Requirements for insulation according to type of circuit
Replacement:
Replace the text with the following:
Requirements for insulation in particular types of circuits are specified as follows:
a) in 6.7.2 for MAINS CIRCUITS of OVERVOLTAGE CATEGORY II with a nominal supply voltage up
to 300 V;
NOTE 1 See Annex I for nominal voltages of MAINS supplies.
b) in 6.7.3 for secondary circuits separated from the circuits in a) only by means of a
transformer;
c) in Clause K.1 for MAINS CIRCUITS of OVERVOLTAGE CATEGORY III or IV or for OVERVOLTAGE
CATEGORY II over 300 V;
d) in Clause K.2 for secondary circuits separated from the circuits in c) only by means of a
transformer;
e) in Clause K.3 for circuits that have one or more of the following characteristics:
1) the maximum possible TRANSIENT OVERVOLTAGE is limited by the supply source or
within the equipment to a known level below the level assumed for the MAINS CIRCUIT;
2) the maximum possible TRANSIENT OVERVOLTAGE is above the level assumed for the
MAINS CIRCUIT;
3) the WORKING VOLTAGE is the sum of voltages from more than one circuit, or is a mixed
voltage;
4) the WORKING VOLTAGE includes a recurring peak voltage that may include a periodic
non-sinusoidal waveform or a non-periodic waveform that occurs with some regularity;
5) the WORKING VOLTAGE has a frequency above 30 kHz;
6) the circuit is a measuring circuit where MEASUREMENT CATEGORIES do not apply;
f) in Clause K.101 for measuring circuits of MEASUREMENT CATEGORIES II, III and IV.
NOTE 2 These requirements are illustrated in the flowchart of Annex DD.
NOTE 3 See Clause K.3 for requirements for switching circuits such as a switching power supply.
NOTE 4 The assumed transient level for MAINS is defined in IEC 60364-4-44:2007/AMD1:2015, Table 443.2.
7 Protection against mechanical HAZARDS
This clause of Part 1 is applicable.
8 Resistance to mechanical stresses
This clause of Part 1 is applicable.
9 Protection against the spread of fire
This clause of Part 1 is applicable.

– 16 – IEC 61010-2-030:2017 © IEC 2017
10 Equipment temperature limits and resistance to heat
This clause of Part 1 is applicable.
11 Protection against HAZARDS from fluids and solid foreign objects
This clause of Part 1 is applicable.
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure
This clause of Part 1 is applicable.
13 Protection against liberated gases and substances, explosion and implosion
This clause of Part 1 is applicable.
14 Components and subassemblies
This clause of Part 1 is applicable except as follows:
Addition:
Add the following new subclauses:
14.101 Circuits used to limit TRANSIENT OVERVOLTAGE in measuring circuits used to
measure MAINS
If control of TRANSIENT OVERVOLTAGES is employed in a measuring circuit used to measure
MAINS, the overvoltage limiting component or circuit shall have adequate strength to limit likely
TRANSIENT OVERVOLTAGES.
Conformity is checked by applying five positive and five negative impulses with the applicable
impulse voltage of Table 102, spaced up to 1 min apart, from a hybrid impulse generator (see
µs, a short-
IEC 61180-1). The generator produces an open-circuit voltage waveform of 1,2/50
circuit current waveform of 8/20 µs, with an output impedance (peak open-circuit voltage
divided by peak short-circuit current) of 2 Ω for MEASUREMENT CATEGORIES III and IV or 12 Ω
for MEASUREMENT CATEGORIES II. Resistance may be added in series if needed to raise the
impedance.
The test voltage is applied while the circuit is operating under conditions of NORMAL USE, in
combination with the MAINS voltage between each pair of TERMINALS used to measure MAINS
where voltage-limiting components or circuits are present.
The MAINS voltage is the maximum RATED line-to-neutral voltage of the MAINS being measured.
For measuring circuits RATED for MAINS line-to-neutral voltages above 400 V a.c. r.m.s. or d.c.,
the test may be performed with an available voltage source that has a line-to-neutral voltage
of at least 400 V a.c. r.m.s. or d.c. The voltage source does not, in this case, need to match
the measuring circuit RATING, but circuits RATED for a.c. are tested with an a.c. source, and
circuits RATED for d.c. are tested with a d.c. source.
NOTE This test can be extremely hazardous. Explosion shields and other provisions can be used to protect
personnel performing the test.

The overvoltage limiting component or circuit shall not rupture or overheat during the test. If
the results of the test are questionable or inconclusive, the test is to be repeated two more
times.
Table 102 – Impulse voltages
Nominal a.c. r.m.s
Impulse voltage
line-to-neutral or d.c.
V
voltage of MAINS
being measured
MEASUREMENT MEASUREMENT MEASUREMENT
V
CATEGORY II CATEGORY III CATEGORY IV
500 800 1 500
≤ 50
800 1 500 2 500
> 50 ≤ 100
> 100 ≤ 150 1 500 2 500 4 000
2 500 4 000 6 000
> 150 ≤ 300
4 000 6 000 8 000
> 300 ≤ 600
> 600 ≤ 1 000 6 000 8 000 12 000
a
8 000 10 000 15 000
> 1 000 ≤ 1 500
a
Only for d.c. voltage.
14.102 Probe assemblies and accessories
Probe assemblies and accessories within the scope of IEC 61010-031, and current sensors
within the scope of IEC 61010-2-032 shall meet the requirements thereof.
Conformity is checked by inspection.
15 Protection by interlocks
This clause of Part 1 is applicable.
16 HAZARDS resulting from application
This clause of Part 1 is applicable.
17 RISK assessment
This clause of Part 1 is applicable.
Addition:
Add the following new clause:
101 Measuring circuits
101.1 General
The equipment shall provide protection against HAZARDS resulting from NORMAL USE and
REASONABLY FORESEEABLE MISUSE of measuring circuits, as specified below.

– 18 – IEC 61010-2-030:2017 © IEC 2017
a) If a HAZARD could result, a current measuring circuit shall not interrupt the circuit being
measured during range changing, or during the use of current transformers without
internal protection (see 101.2).
b) An
...