IEC 61010-2-034:2017

Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-034: Particular requirements for measurement equipment for insulation resistance and test equipment for electric strength

IEC 61010-2-034:2017 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 61010-2-034:2017 specifies safety requirements for measurement equipment for insulation resistance and test equipment for electric strength with an output voltage exceeding 50 V a.c. or 120 V d.c.
This document also applies to combined measuring equipment which has an insulation resistance measurement function or an electric strength test measurement function. This publication is to be read in conjunction with IEC 61010-1:2010.

Exigences de sécurité pour appareils électriques de mesurage, de régulation et de laboratoire - Partie 2-034: Exigences particulières applicables aux appareils de mesure de la résistance d'isolement et aux appareils d'essai de rigidité diélectrique

L'IEC 61010-2-034:2017 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.
L'IEC 61010-2-034:2017 spécifie les exigences de sécurité applicables aux appareils de mesure de la résistance d'isolement et aux appareils d'essai de rigidité diélectrique avec une tension de sortie supérieure à 50 V en courant alternatif ou 120 V en courant continu.
Le présent document s'applique également aux appareils de mesure combinés équipés d'une fonction de mesure de la résistance d'isolement ou d'une fonction de mesure de la rigidité diélectrique. Cette publication doit être lue conjointement avec l' IEC 61010-1:2010.

General Information

• Status: Published
• Publication Date: 09-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: 17-Jul-2023
• Completion Date: 02-Aug-2021

Relations

• Revised: IEC 61010-2-034:2023 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-034: Particular requirements for measurement equipment for insulation resistance and test equipment for electric strength
• Effective Date: 05-Sep-2023

Overview

IEC 61010-2-034:2017 is an international standard published by the International Electrotechnical Commission (IEC) that outlines safety requirements for electrical equipment used in measurement, control, and laboratory environments. It focuses specifically on the particular requirements for measurement equipment designed to test insulation resistance and electric strength. The standard applies to devices with output voltages exceeding 50 V AC or 120 V DC, including combined equipment with insulation resistance measurement or electric strength test functionalities.

This standard serves as a product safety benchmark for manufacturers and technical committees developing similar equipment, ensuring consistent safety practices in design and testing worldwide. It should be used in conjunction with IEC 61010-1, which covers general safety requirements for electrical measurement equipment.

Key Topics

The IEC 61010-2-034:2017 standard covers a broad range of critical safety aspects, including:

• Protection Against Electric Shock: Detailed requirements to minimize risk of electric shock during use, focusing on insulation, protective screens, double insulation, and clearance distances.
• Mechanical Hazards: Measures to guard against mechanical harm arising from the equipment’s design and operation.
• Resistance to Mechanical Stresses: Guidelines ensuring devices withstand physical stresses encountered during normal use without compromising safety.
• Fire Prevention: Standards for materials and construction that reduce fire risks.
• Temperature Limits: Specifications for equipment temperature tolerances under operation to prevent overheating and related hazards.
• Protection Against Foreign Objects and Fluids: Safeguards to prevent ingress of dust, liquids or other foreign bodies that could impair safe operation.
• Radiation and Acoustic Hazards: Considerations for protection from harmful radiation, laser sources, and ultrasonic pressures.
• Explosion and Implosion Risks: Controls related to hazardous substances and extreme pressure conditions.
• Use of Components and Subassemblies: Requirements for selection of electrical and mechanical parts to meet safety criteria.
• Interlocks and Safety Mechanisms: Integration of devices preventing hazardous operation.
• Risk Assessment Procedures: Framework for identifying and mitigating potential hazards associated with equipment use.
• Measurement Categories and Circuit Requirements: Classification of measuring circuits and detailed guidelines on clearance, creepage distances, and insulation testing to handle different voltage environments safely.

Applications

IEC 61010-2-034:2017 is essential for any organization involved in the design, manufacture, or certification of:

• Insulation resistance testers for electrical components and systems.
• Electric strength test equipment used to verify dielectric resilience of materials and assemblies.
• Combined measuring devices incorporating insulation and dielectric testing functions.
• Laboratory instruments requiring compliance with electric safety standards to protect personnel and equipment.
• Quality control and maintenance tools used in industrial, electrical, and electronics sectors to ensure system safety.
• Technical committees and regulatory bodies referencing safety benchmarks for standard development or product approval.

This ensures enhanced workplace safety, compliance with international regulations, and reduction of risks related to electrical hazards during testing and measurement activities.

Related Standards

IEC 61010-2-034:2017 is part of the wider IEC 61010 series addressing safety of electrical equipment for measurement, control, and laboratory use. Key related standards include:

• IEC 61010-1: General safety requirements that apply to all electrical measuring equipment, which this standard supplements with specific insulation and dielectric test provisions.
• IEC Guide 104: Defines principles for group safety publications, providing the framework for this standard’s development.
• ISO/IEC Guide 51: Guidelines on safety aspects and risk assessment methodologies.
• Various other IEC technical specifications that cover components, testing procedures, and electrical safety classifications.

Adherence to these combined standards allows manufacturers and users to achieve internationally harmonized safety levels, facilitating global trade and regulatory acceptance.

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Keywords: IEC 61010-2-034, insulation resistance measurement, electric strength test equipment, electrical safety standards, insulation testers, dielectric testing, measurement equipment safety, IEC 61010 series, electrical hazard prevention, laboratory electrical equipment safety.

Standards Content (Sample)

IEC 61010-2-034 ®
Edition 1.0 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 2-034: Particular requirements for measurement equipment for insulation
resistance and test equipment for electric strength

Exigences de sécurité pour appareils électriques de mesurage, de régulation et
de laboratoire –
Partie 2-034: Exigences particulières applicables aux appareils de mesure de la
résistance d'isolement et aux appareils d'essai de rigidité diélectrique

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IEC 61010-2-034 ®
Edition 1.0 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 2-034: Particular requirements for measurement equipment for insulation

resistance and test equipment for electric strength

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

de laboratoire –
Partie 2-034: Exigences particulières applicables aux appareils de mesure de la

résistance d'isolement et aux appareils d'essai de rigidité diélectrique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.080, 71.040.10 ISBN 978-2-8322-3789-2

– 2 – IEC 61010-2-034:2017 © IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope and object . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Tests . 8
5 Marking, indicators and documentation . 8
6 Protection against electric shock . 11
7 Protection against mechanical HAZARDS . 19
8 Resistance to mechanical stresses . 19
9 Protection against the spread of fire . 19
10 Equipment temperature limits and resistance to heat . 19
11 Protection against HAZARDS from fluids and solid foreign objects . 19
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure . 19
13 Protection against liberated gases and substances, explosion and implosion . 19
14 Components and subassemblies . 19
15 Protection by interlocks . 20
16 HAZARDS resulting from application . 20
17 RISK assessment . 21
101 Measuring circuits . 21
Annexes . 27
Annex K (normative) Insulation requirements not covered by 6.7 . 27
Annex L (informative) Index of defined terms . 34
Annex AA (normative) Measurement categories . 35
Annex BB (informative) HAZARDS pertaining to measurements performed in certain
environments . 37
Annex CC (informative) 4 mm “banana” TERMINALS . 40
Annex DD (informative) Flowchart for insulation according to the type of circuit . 42
Bibliography . 45

Figure 101 – Duration of current flow versus body current for a.c. and d.c. currents. 13
Figure 102 – Circuit with protective screen . 17
Figure 103 – Circuit with DOUBLE INSULATION . 18
Figure AA.1 – Example to identify the locations of measuring circuits . 36
Figure CC.1 – Recommended dimensions for 4 mm TERMINALS . 41
Figure DD.1 – Requirements for CLEARANCE, CREEPAGE DISTANCE and solid insulation . 44

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 . 20
Table K.101 – CLEARANCES for measuring circuits of MEASUREMENT CATEGORIES II, III
and IV . 28

Table K.102 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY II . 29
Table K.103 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY III . 30
Table K.104 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY IV . 30
Table K.105 – Test voltages for testing long term stress of solid insulation in
measuring circuits . 30
Table K.106 – Maximum TRANSIENT OVERVOLTAGES . 33
Table AA.1 – Characteristics of MEASUREMENT CATEGORIES . 36

– 4 – IEC 61010-2-034:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-034: Particular requirements for measurement equipment
for insulation resistance and test equipment for electric strength

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 61010-2-034 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.
The text of this standard is based on the following documents:
FDIS Report on voting
66/614/FDIS 66/622/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 2-034 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 2-034 supplements or modifies the corresponding clauses in IEC 61010-1 so as to
convert that publication into the IEC standard: Particular requirements for measurement
equipment for insulation resistance and test equipment for electric strength.
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.
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.
– 6 – IEC 61010-2-034:2017 © IEC 2017
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 2-034 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.
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).
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.
All requirements of Part 2-030 have been included into Part 2-034. Equipment within the
scopes of both 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 034, the
standards are read in conjunction.

SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-034: Particular requirements for measurement equipment
for insulation resistance and test equipment for electric strength

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 measurement equipment for
insulation resistance and test equipment for electric strength with an output voltage exceeding
50 V a.c. or 120 V d.c.
This document also applies to combined measuring equipment which has an insulation
resistance measurement function or an electric strength test measurement function.
1.1.2 Equipment excluded from scope
Addition:
Add the following new items to the list:
aa) IEC 61557-8 (Electrical safety in low voltage distribution systems up to 1 000 V a.c. and
1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures –
– Part 8: Insulation monitoring devices for IT systems);
bb) IEC 61557-9 (Electrical safety in low voltage distribution systems up to 1 000 V a.c. and
1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures –
Part 9: Equipment for insulation fault location in IT systems).
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:

– 8 – IEC 61010-2-034:2017 © IEC 2017
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:
Replace the title with the following new title:
5 Marking, indicators and documentation
5.1.5 TERMINALS, connections and operating devices
Addition:
Add the following new subclause:
5.1.5.101 Measuring circuit TERMINALS
5.1.5.101.1 General
Some measuring circuit TERMINALS for the equipment within the scope of this standard also
serve as output TERMINALS.
Except as permitted in 5.1.5.101.5:
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
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, 5.1.5.101.3
and 5.1.5.101.4, taking the exceptions in 5.1.5.101.5 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.

– 10 – IEC 61010-2-034:2017 © IEC 2017
5.1.5.101.4 HAZARDOUS LIVE output TERMINALS
Output TERMINALS of measurement equipment for insulation resistance and test equipment for
electric strength which can be HAZARDOUS LIVE shall be marked with symbol 12 of Table 1 in
close proximity to those TERMINALS.
Conformity is checked by inspection.
5.1.5.101.5 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
MEASUREMENT CATEGORIES II, III or IV, information regarding the MEASUREMENT
for
CATEGORY, RATED voltages or RATED current, 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
RATED currents, and RATED TRANSIENT OVERVOLTAGES as applicable (see
voltages,
5.1.5.101.5).
Addition:
Add the following new subclause:
5.101 HAZARD indicator
5.101.1 General
At least one of the following HAZARD indicators shall be provided:
a) HAZARD indicator lamp
Where a HAZARD indicator lamp is provided, it shall illuminate or flash when there are
HAZARDOUS LIVE voltages present on the TERMINALS. It may start illuminating or flashing at
any point the output is activated.
The indicator lamp shall be red in colour.
If the indicator lamp flashes, the frequency shall be 50 cycles per minute to 300 cycles per
minute. The duty cycle shall be at least 40 %.
Conformity is checked by inspection and measurement.
b) Variable visible indicator
Where a variable visible indicator with contrasting colours is provided, it shall operate
when there are HAZARDOUS LIVE voltages present on the TERMINALS. It may start operating
at any point the output is activated.
The visible indicator shall have equally spaced areas of significantly contrasting colours
and / or patterns.
Conformity is checked by inspection.
c) Audible indicator
Where an audible indicator is provided, it shall produce a sound with a minimum constant
sound pressure level of 70 dBA and a frequency of the fundamental wave lower than
5 kHz to warn the OPERATOR or a bystander when there are HAZARDOUS LIVE voltages
present on the TERMINALS. It may start producing a sound at any point the output is
activated.
Conformity is checked by measuring the maximum A-weighted sound pressure level at the
OPERATOR'S position and at bystander positions. The following conditions apply.
1) During measurement, the equipment is fitted and operated as in NORMAL USE.
2) Sound level meters used in the measurement conform either to type 1 of IEC 61672-1
or, if an integrating sound level meter, to type 1 of IEC 61672-2.
3) The distance between any wall or any other object and the surface of the equipment is
not less than 3 m.
5.101.2 HAZARD indicator lamp for fixed equipment
Where the test equipment can be permanently installed, provision shall be made to connect
HAZARD indicator lamp.
an external
The power source for the external indicator lamp may be separate from the test equipment.
Conformity is checked by inspection.
6 Protection against electric shock
This clause of Part 1 is applicable except as follows:

– 12 – IEC 61010-2-034:2017 © IEC 2017
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 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 61010-2-034:2017 © 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).
As an exception, conductive parts of locking-type or screw-held-type TERMINALS including
TERMINALS which do not require the use of a TOOL for unlocking or unscrewing shall not be
ACCESSIBLE while they are in unmated position.
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
> 30 ≤ 300 0,8
1,0
> 300 ≤ 600
2,6
> 600 ≤ 1 000
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.,
TERMINAL shall not be ACCESSIBLE.
but conductive parts of unmated measuring circuit
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 RATED voltage is applied to any other
measuring circuit TERMINAL.
NOTE These specialized TERMINALS include, but are not limited to, TERMINALS for 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.
6.9 Constructional requirements for protection against electric shock
Addition:
Add the following new subclauses and figures:
6.9.101 Protection against unintended energising of the output
If the equipment outputs could become HAZARDOUS LIVE, they shall be prevented from being
energised unintentionally.
– 16 – IEC 61010-2-034:2017 © IEC 2017
Examples of such methods include:
a) A test energising switch which requires the OPERATOR to apply continuous pressure for a
period of at least 1 s.
b) A test energising switch with a key operated mechanism.
c) A test energising switch under a spring loaded cover which shall be lifted to access the
switch.
d) Two switches intended to restrict OPERATOR'S use of both hands, which are simultaneously
depressed to active the test. The instruction of the equipment shall include a warning to
press the two switches with both hands.
An automatic operation to energise the equipment outputs shall be provided with interlocks
(see Clause 15) and the documentation shall have a warning to keep distance from the unit
under test.
Conformity is checked by inspection.
6.9.102 Protection against automatic energising of the output
In case of power failure and subsequent restoration of the power supply, the equipment shall
always power on in a safe condition, even if the test energising switch is held on while the
power is restored.
Conformity is checked by inspection.
6.9.103 Discharging residual voltages
The equipment shall be capable of safely discharging residual voltages on the line or unit
under test. If resistors are used to discharge the residual voltage, they shall be RATED for the
maximum output voltage and stored energy in a defined time.
The line or unit capacitance is the capacitance between the conductors under test. The
maximum RATED line or unit capacitance shall be stated in the user documentation.
The time for a charge cycle is t . The charge time for the maximum line or unit capacitance is
c
used to calculate the maximum allowable discharge time.
The maximum allowable time for a discharge cycle to be within safe limits as specified in
6.3.1 is t . The discharge time t shall be less than 4 × t or 10 s whichever is greater.
d d c
If the equipment is fitted with a voltage display, the voltage on the equipment TERMINALS shall
be displayed if the TERMINALS are HAZARDOUS LIVE.
Conformity is checked by inspection and by the following test:
If the manufacturer of the equipment has specified a maximum line or unit capacitance equal
to or greater than 1 nF and an output voltage not exceeding 10 000 V, then the conformity test
is applied using a capacitor within 10 % of the value given by using line A of Figure 3 unless
the manufacturer’s specified maximum line or unit capacitance is smaller, in which case a
capacitor within 10 % of this value should be used.
For equipment specified for a maximum possible line or unit capac
...