IEC 61010-2-033:2019

Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-033: Particular requirements for hand-held multimeters and other meters for domestic and professional use, capable of measuring mains voltage

IEC 61010-2-033:2019 specifies safety requirements for hand-held multimeters for domestic and professional use, capable of measuring mains. Hand-held multimeters are multi-range multifunction measuring instruments intended to measure voltage and other electrical quantities such as resistance or current. Their primary purpose is to measure voltage on a live mains. They are suitable to be supported by one hand during normal use. This second edition cancels and replaces the first edition published in 2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- The scope has been reduced to hand-held multimeters. Voltmeters and clamp multimeters have been removed. They are addressed respectively by IEC 61010-2-030 and IEC 61010-2-032. The relevant definitions have been removed.
- Subclause 4.4.2.101 has been relocated into Clause 102.
- Clearances and creepage distances for wet locations and for measuring circuit terminals exceeding 1 000 V a.c. or 1 414 V d.c. have been specified.
- Subclause 14.101 related to "Circuits or components used as transient overvoltage limiting devices in measuring circuits used to measure mains" has been removed.
- References to IEC 61010-031 for probe assemblies and IEC 61010-2-032 for current sensors have been added.
- Requirements for protection against mains overvoltage measuring circuits have been added.
- Clause 102 has been rewritten.
- Requirements for measuring circuits from 1 000 V to 3 000 V have been added.
- An informative Annex CC about dimensions of 4-mm banana terminals has been added.
- A flowchart for insulation according to the type of circuit has been added in a new Annex DD.

Exigences de sécurité pour appareils électriques de mesurage, de régulation et de laboratoire - Partie 2-033: Exigences particulières pour les multimètres portatifs pour usage domestique et professionnel, capables de mesurer la tension réseau

L'IEC 61010-2-033:2019 spécifie les exigences de sécurité applicables aux multimètres portatifs pour usage domestique et professionnel, capables de mesurer la tension réseau. Les multimètres portatifs sont des instruments de mesure multifonctions et avec plusieurs plages, destinés à mesurer la tension et d'autres grandeurs électriques telles que la résistance ou le courant. Ils ont pour objectif principal de mesurer la tension sur un réseau sous tension. Ils peuvent être tenus à la main en utilisation normale. Cette deuxième édition annule et remplace la première édition parue en 2012. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- Le domaine d'application a été réduit aux multimètres portatifs. Les voltmètres et les pinces multimétriques ont été supprimés. Ils sont traités respectivement par l'IEC 61010­2­030 et l'IEC 61010-2-032. Les définitions correspondantes ont été supprimées.
- Le 4.4.2.101 a été intégré à l'Article 102.
- Les distances d'isolement et les lignes de fuite applicables aux emplacements humides et aux bornes des circuits de mesure dont la tension alternative est supérieure à 1 000 V ou la tension continue est supérieure à 1 414 V ont été spécifiées.
- Les exigences pour "Circuits ou composants utilisés comme limiteurs de surtensions dans les circuits de mesure utilisés sur un RESEAU" ont été supprimées. Le paragraphe 14.102 a été renuméroté 14.101.
- Des références à l'IEC 61010-031 pour les sondes équipées et à l'IEC 61010-2-032 pour les capteurs de courant ont été ajoutées.
- Des exigences relatives à la protection des circuits de mesure contre les surtensions du réseau ont été ajoutées.
- L'Article 102 a été reformulé.
- Des exigences concernant les circuits de mesure entre 1 000 V et 3 000 V ont été ajoutées.
- Une Annexe CC informative relative aux dimensions des bornes "banane" de 4 mm a été ajoutée.
- Un organigramme de l'isolation selon le type de circuit a été ajouté dans une nouvelle Annexe DD.

General Information

• Status: Published
• Publication Date: 20-Jun-2019
• 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

• Revised: IEC 61010-2-033:2023 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-033: Particular requirements for hand-held multimeters and other meters for domestic and professional use, capable of measuring mains voltage
• Effective Date: 05-Sep-2023
• Revises: IEC 61010-2-033:2012 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-033: Particular requirements for hand-held multimeters and other meters, for domestic and professional use, capable of measuring mains voltage
• Effective Date: 05-Sep-2023

Overview

IEC 61010-2-033:2019 is the IEC particular standard that defines safety requirements for hand-held multimeters and other hand-held meters for domestic and professional use that are capable of measuring mains voltage. Edition 2.0 (2019) is a technical revision of the 2012 edition and is intended to be used together with IEC 61010-1 (the general requirements for measurement, control and laboratory equipment).

Key topics and technical requirements

• Scope narrowed to hand-held multimeters: voltmeters and clamp meters were removed and are addressed by other parts (IEC 61010-2-030 and IEC 61010-2-032).
• Measuring-circuit safety: requirements for measuring circuits up to and beyond 1 000 V a.c. (and up to 3 000 V) have been added, including protection against mains overvoltage.
• Clearances and creepage distances: specified for wet locations and for terminals exceeding 1 000 V a.c. / 1 414 V d.c., to reduce risk of flashover and insulation breakdown.
• Insulation and impulse testing: Clause updates and a rewritten Clause 102 cover insulation, impulse voltages and testing criteria for indicating devices and circuits.
• References to probe and sensor standards: cross-references to IEC 61010-031 (probe assemblies) and IEC 61010-2-032 (current sensors) are added to clarify accessory and sensor safety responsibilities.
• Removed and revised clauses: some transient overvoltage-limiting device clauses were removed; other clauses were reorganized for clarity.
• Informative annexes: Annex CC (dimensions for 4-mm “banana” terminals) and Annex DD (flowchart for insulation by circuit type) provide practical guidance.

Practical applications and users

Who uses IEC 61010-2-033:2019?

• Manufacturers and designers of hand-held multimeters and portable test meters that measure mains voltage.
• Test and quality engineers validating product safety and compliance for domestic and professional markets.
• Certification bodies and conformity assessment laboratories performing safety tests to IEC requirements.
• Product managers and procurement teams specifying compliant meters for field service, electrical installation, maintenance, and troubleshooting.

Why it matters:

• Ensures safer designs for hands-on voltage measurement on live mains circuits.
• Provides clear rules for insulation, terminal spacing, and protection against overvoltage - key for reducing electric shock and fire risks.

Related standards

• IEC 61010-1 (general safety requirements)
• IEC 61010-2-030 (voltmeters and related equipment)
• IEC 61010-2-032 (clamp/current sensors)
• IEC 61010-031 (probe assemblies)
• IEC 61010-2-034 (insulation resistance and high-voltage test equipment)

Keywords: IEC 61010-2-033:2019, hand-held multimeters, safety requirements, mains voltage, clearances, creepage distances, insulation, probe assemblies, current sensors.

Standards Content (Sample)

IEC 61010-2-033 ®
Edition 2.0 2019-06
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Safety requirements for electrical equipment for measurement, control
and laboratory use –
Part 2-033: Particular requirements for hand-held multimeters and other METERS,
for domestic and professional use, capable of measuring MAINS voltage

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IEC 61010-2-033 ®
Edition 2.0 2019-06
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Safety requirements for electrical equipment for measurement, control

and laboratory use –
Part 2-033: Particular requirements for hand-held multimeters and other METERS,

for domestic and professional use, capable of measuring MAINS voltage

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.080; 71.040.10 ISBN 978-2-8322-7106-3

– 2 – IEC 61010-2-033:2019 RLV © IEC 2019

CONTENTS
FOREWORD . 4

INTRODUCTION . 7

1 Scope and object . 8

2 Normative references . 9

3 Terms and definitions . 9

4 Tests . 10

5 Marking and documentation . 11
6 Protection against electric shock . 14
7 Protection against mechanical HAZARDS . 17
8 Resistance to mechanical stresses . 17
9 Protection against the spread of fire . 18
10 Equipment temperature limits and resistance to heat . 18
11 Protection against HAZARDS from fluids and solid foreign objects . 18
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure . 18
13 Protection against liberated gases and substances, explosion and implosion . 18
14 Components and subassemblies . 18
15 Protection by interlocks . 19
16 HAZARDS resulting from application . 19
17 RISK assessment . 20
101 Measuring circuits . 20
102 Indicating devices . 25
Annexes . 28
Annex K (normative) Insulation requirements not covered by 6.7 . 28
Annex L (informative) Index of defined terms . 36
Annex AA (normative) Measurement categories . 37
Annex BB (informative) HAZARDS pertaining to measurements performed in certain
environments . 40
Annex CC (informative) 4-mm "banana" TERMINALS . 43

Annex DD (informative) Flowchart for insulation according to the type of circuit . 45
Bibliography . 48

Figure 4 – Acceptable arrangement of protective means against electric shock . 14
Figure AA.1 – Example to identify the locations of measuring circuits . 38
Figure CC.1 – Recommended dimensions of 4-mm TERMINALS . 44
Figure DD.1 – Requirements for CLEARANCE, CREEPAGE DISTANCE and solid insulation . 47

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 . 15
Table 102 – Impulse voltages . 25
Table K.101 – CLEARANCES of measuring circuits RATED for MEASUREMENT CATEGORIES
III and IV . 29

Table K.102 – a.c. test voltages for testing electric strength of solid insulation in

measuring circuits RATED for MEASUREMENT CATEGORIES III and IV . 31

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

RATED for MEASUREMENT CATEGORIES III and IV . 31
measuring circuits
Table K.104 – Test voltages for testing long-term stress of solid insulation in
measuring circuits RATED for MEASUREMENT CATEGORIES III and IV . 32

Table K.105 – Minimum values for distance or thickness of solid insulation in

measuring circuits RATED for MEASUREMENT CATEGORIES III and IV . 34

Table AA.1 – Characteristics of MEASUREMENT CATEGORIES . 39

– 4 – IEC 61010-2-033:2019 RLV © IEC 2019

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT

FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-033: Particular requirements for hand-held multimeters

and other METERS, for domestic and professional use, capable of

measuring MAINS voltage
FOREWORD
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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 61010-2-033 has been prepared by IEC technical committee 66:
Safety of measuring, control and laboratory equipment.

This second edition cancels and replaces the first edition published in 2012. This edition
constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous
edition:
a) The scope has been reduced to hand-held multimeters. Voltmeters and clamp multimeters

have been removed. They are addressed respectively by IEC 61010-2-030 and

IEC 61010-2-032. The relevant definitions have been removed.
b) Subclause 4.4.2.101 has been relocated into Clause 102.
c) CLEARANCES and CREEPAGE DISTANCES for WET LOCATIONS and for measuring circuit
TERMINALS exceeding 1 000 V a.c. or 1 414 V d.c. have been specified.
d) Subclause 14.101 related to "Circuits or components used as TRANSIENT OVERVOLTAGE
limiting devices in measuring circuits used to measure MAINS" has been removed.
e) References to IEC 61010-031 for probe assemblies and IEC 61010-2-032 for current
sensors have been added.
f) Requirements for protection against MAINS overvoltage measuring circuits have been
added.
g) Clause 102 has been rewritten.
h) Requirements for measuring circuits from 1 000 V to 3 000 V have been added.
i) An informative Annex CC about dimensions of 4-mm banana TERMINALS has been added.
j) A 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
66/692/FDIS 66/694/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all the parts in the IEC 61010 series, published under the general title Safety
requirements for electrical equipment for measurement, control, and laboratory use, can be
found on the IEC website.
This Part 2-033 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 and its Amendment 1
(2016), hereinafter referred to as Part 1.
This Part 2-033 supplements or modifies the corresponding clauses in IEC 61010-1 so as to
convert that publication into the IEC standard: Particular requirements for hand-held
multimeters for domestic and professional use, capable of measuring MAINS voltage.
Where a particular subclause of Part 1 is not mentioned in this Part 2-033, that subclause
applies as far as is reasonable. Where this Part 2-033 states "addition", "modification",
"replacement", or "deletion", the relevant requirement, test specification or note in Part 1
should be adapted accordingly.

– 6 – IEC 61010-2-033:2019 RLV © IEC 2019

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

– requirements: in roman type;

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

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

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).
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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 will be

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

part 2‘s of the standard which must be read in conjunction with the Part 1 requirements.

This Part 2-033 specifies the safety requirements for HAND HELD METERS that have a primary

purpose of measuring voltage on a live MAINS CIRCUIT.

Part 2-032 specifies the safety requirements that are generally applicable to HAND-HELD and

hand-manipulated current sensors.
Part 2-030 specifies the safety requirements for testing and measuring circuits which are
connected for test or measurement purposes to devices or circuits outside the measurement
equipment itself.
VOLTMETER and similar equipment that are not within the scope of Part 2-033 are considered
to be covered by the requirements of Part 2-030 or Part 2-032. But for equipment within the
scopes of both Part 2-032 and Part 2-033, the two standards must be read in conjunction.
Part 2-030 specifies the safety requirements for equipment with testing and measuring circuits
which are connected for test or measurement purposes to devices or circuits outside the
measurement equipment itself. Requirements of Part 2-030 have been included in this Part 2-
033. Equipment within the scopes of both Part 2-030 and Part 2-033 are considered to be
covered by the requirements of this Part 2-033.
Part 2-032 specifies the safety requirements for hand-held and hand-manipulated current
sensors. For equipment within the scope of Part 2-032 and Part 2-033, only Part 2-032 is
applicable.
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. For equipment within the scope of Part 2-033 and
Part 2-034, only Part 2-034 is applicable.

– 8 – IEC 61010-2-033:2019 RLV © IEC 2019

SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT

FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-033: Particular requirements for hand-held multimeters

and other METERS, for domestic and professional use, capable of

measuring MAINS voltage
1 Scope and object
This clause of Part 1 is applicable except as follows:
1.1.1 Equipment included in scope
Replace the existing text with the following:
This part of IEC 61010 specifies safety requirements for METERS.
The METERS that have a primary purpose of measuring voltage on a live MAINS CIRCUIT are
within the scope of this standard. They have various names, but all of them have capability for
measurements of voltages on a live MAINS CIRCUIT. Some of the names given to this
equipment are as follows:
– MULTIMETER;
– digital MULTIMETER;
– VOLTMETER;
– clamp METER (see also Part 2-032).
For the purpose of this standard, the term METER is used for these HAND-HELD measuring
instruments.
NOTE Parts of the equipment that are not within the scope of this Part 2-033 are considered to be covered by the
requirements of Part 1 or other part 2's of IEC 61010 and then will also need to meet the requirements of these
other parts.
This part of IEC 61010 specifies safety requirements for hand-held multimeters for domestic
and professional use, capable of measuring MAINS.

Hand-held multimeters are multi-range multifunction measuring instruments intended to
measure voltage and other electrical quantities such as resistance or current. Their primary
purpose is to measure voltage on a live MAINS. They are suitable to be supported by one hand
during NORMAL USE.
1.1.2 Equipment excluded from scope
Add the following new item to the list and the following paragraph:
aa) IEC 61557-1 to IEC 61557-12, 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
Addition:
Add the two following paragraphs at the end of the subclause:

Equipment that is not capable of measuring MAINS voltages is not within the scope of this

Part 2-033. See IEC 61010-2-030 for requirements pertaining to such equipment.

Such equipment, including other HAND-HELD EQUIPMENT such as oscilloscopes, wattmeters,

process control multimeters not RATED for measuring voltage on a live MAINS, clamp

multimeters and communications test sets is are not within the scope of this document.

1.2.1 Aspects included in scope

Add the following two new paragraphs at the end of the subclause:

Requirements for protection against HAZARDS resulting from NORMAL USE and REASONABLY
FORESEEABLE MISUSE of measuring circuits are given in Clause 101.
Requirements for reliance on the displayed value are given in Clause 102.
2 Normative references
This clause of Part 1 is applicable except as follows:
Replace "IEC 61010-031" with the following new reference:
IEC 61010-031:2015, Safety requirements for electrical equipment for measurement, control,
and laboratory use – Part 031: Safety requirements for hand-held and hand-manipulated
probe assemblies for electrical test and measurement
IEC 61010-031:2015/AMD1:2018
Replace "IEC 61180-1 (all parts)", "IEC 61180-1" and "IEC 61180-2", with the following new
reference:
IEC 61180, High-voltage test techniques for low-voltage equipment – Definitions, test and
procedure requirements, test equipment
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:
3.1 Equipment and states of equipment
Addition:
Add the following new definitions:
3.1.101
MULTIMETER
multirange multifunction measuring instrument intended to measure voltage and sometimes
other electrical quantities such as current and resistance
[SOURCE: IEC 60050-300:2001, 312-02-24, modified]

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3.1.102
VOLTMETER
instrument intended to measure the value of a voltage

[SOURCE: IEC 60050-300:2001, 313-01-03]

3.1.103
METER
voltage measuring instrument which is either a HAND-HELD VOLTMETER or a HAND-HELD
MULTIMETER
3.1.104
HAND-HELD (equipment)
intended to be supported by one hand during NORMAL USE
3.5 Safety terms
Replace the definitions of 3.5.4 and 3.5.5 with the following new definitions:
3.5.4
MAINS
low-voltage electricity supply system to which the current sensor concerned is designed to be
connected for the purpose of powering the current sensor or for measurements
electricity supply system
3.5.5
MAINS CIRCUIT
circuit which is intended to be directly connected to the MAINS for the purpose of powering the
current sensor or for measurements
Add the following new term and 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 at which 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, except as follows:
4.4.2 Application of fault conditions
4.4.2.1 General
Replacement:
Replace the first sentence with the following text:
Fault conditions shall include those specified in 4.4.2.2 to 4.4.2.14 and in 4.4.2.101.
Addition:
Add the following new subclause:

4.4.2.101 Input voltages
For measuring circuit TERMINALS RATED for MAINS CIRCUITS voltage measurements:

a) up to 600 V a.c. r.m.s., the voltage applied to the TERMINALS is the RATED voltage

multiplied by 1,90 but not to exceed 920 V a.c. r.m.s.;

b) above 600 V a.c. r.m.s. and up to 1 000 V a.c. r.m.s., the voltage applied to the TERMINALS

is 1 100 V a.c. r.m.s.;
c) above 1 000 V a.c. r.m.s., the voltage applied to the TERMINALS is the RATED voltage

multiplied by 1,1;
d) of d.c. voltage, the d.c. voltage applied to the TERMINALS is the RATED voltage multiplied by
1,1.
These voltages are applied with the METER set to each voltage measurement range capable of
MAINS voltage measurements.
NOTE The 1,9 multiplication factor is derived from phase-to-phase voltage measurements with a 10 %
overvoltage condition.
4.3.2.5 MAINS supply
Replace the existing title and the text with:
4.3.2.5 Power supply
The following requirements apply.
a) The MAINS supply voltage shall be between 90 % and 110 % of any RATED supply voltage
RATED for a greater fluctuation,
for which the equipment can be set or, if the equipment is
at any supply voltage within the fluctuation range.
b) The MAINS frequency shall be any RATED frequency.
c) Equipment for both a.c. and d.c. shall be connected to an a.c. or d.c. supply.
d) Equipment powered by single-phase a.c. MAINS supply shall be connected both with
normal and reverse polarity.
e) If the means of connection permits reversal, battery-operated and d.c. equipment shall be
connected with both reverse and normal polarity.
4.3.2.6 Input and output voltages

Replace the first paragraph with the following:
Input and output voltages, including floating voltages but excluding the MAINS supply voltage,
shall be set to any voltage within the RATED voltage range, in normal and reverse polarity if
possible.
5 Marking and documentation
This clause of Part 1 is applicable except as follows:
5.1.2 Identification
Add the following note after the existing note:

– 12 – IEC 61010-2-033:2019 RLV © IEC 2019

NOTE 101 Some national regulations might require a marking to indicate the name and edition of the standard

used for compliance evaluation.

5.1.5 TERMINALS, connections, and operating devices

5.1.5.1 General
Replace the first paragraph with the following:

If necessary for safety, an indication shall be given of the purpose of TERMINALS, connectors,

controls, and indicators. Where there is insufficient space, symbol 14 from Table 1 may be

used.
5.1.5.2 TERMINALS
Replace the existing item d) with the following item d):
d) TERMINALS supplied from the interior of the equipment or from other TERMINALS hand-held
multimeter and which could be HAZARDOUS LIVE, with the voltage, current, charge or
energy value or range, or with symbol 12 of Table 1;
Add the following new item to the list:
aa) TERMINALS supplied from other TERMINALS which could be HAZARDOUS LIVE, with symbol 12
or 14 of Table 1.
Add the following new subclause:
5.1.5.101 Measuring circuit TERMINALS
Measuring circuit TERMINALS shall be marked with the value of the RATED voltage to earth.
Each pair or set of measuring circuit TERMINALS that are intended to be used together shall be
marked with the value of the RATED voltage or the RATED current as applicable to the pair or
set of TERMINALS.
NOTE Measuring circuit TERMINALS are usually arranged 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 will have a RATED voltage to earth. For some equipment hand-held
multimeters, the measurement RATED voltage (between TERMINALS) is may be different from
the RATED voltage to earth. Markings shall be clear to avoid misunderstanding.

Measuring circuit TERMINALS of measuring circuits RATED for MAINS CIRCUITS voltage
measurements shall be additionally marked "CAT lll" and/or "CAT IV" as applicable. Marking
those TERMINALS with these two types, and only these two types, of MEASUREMENT CATEGORY
and its RATED voltage to earth, is permissible. Marking MEASUREMENT CATEGORY II is not
allowed.
Measuring circuit TERMINALS that do not have a RATING for connection to voltages above the
levels of 6.3.1, may be marked with alternative markings.
Measuring circuit TERMINALS which are dedicated only for connection to specific TERMINALS of
other equipment need not be marked provided that there is a means of identifying these
TERMINALS.
TERMINALS markings shall be visible when the equipment hand-held multimeter is ready for
NORMAL USE with connectors and TERMINALS mated and shall reference the applicable
TERMINALS.
Conformity is checked by inspection.

5.2 Warning markings
Replace the existing text with the following text:

Warning markings specified in 5.1.5.2 d), 6.1.2 b), 6.6.2, 7.3.2 b) 3), 7.4, 10.1, and 13.2.2 in

this document shall meet the following requirements.

Warning markings shall be visible when the equipment hand-held multimeter is ready for

NORMAL USE. If a warning applies to a particular part of the equipment hand-held multimeter,

the marking shall be placed on or near that part.
The size of warning markings shall be as follows.
a) Symbols shall be at least 2,75 mm high. Text shall be at least 1,5 mm high and contrast in
colour with the background.
b) Symbols or text moulded, stamped or engraved in a material shall be at least 2,0 mm
high. If not contrasting in colour, they shall have a depth or raised height of at least
0,5 mm.
If it is necessary for the RESPONSIBLE BODY or OPERATOR to refer to the instruction manual to
preserve the protection afforded by the equipment hand-held multimeter, the equipment hand-
held multimeter shall be marked with symbol 14 of Table 1. Symbol 14 is not required to be
used together with symbols which are explained in the manual.
If the instructions for use state that an OPERATOR is permitted to gain access, using a TOOL, to
a part which in NORMAL USE may be HAZARDOUS LIVE, there shall be a warning marking which
states that the equipment must hand-held multimeter shall be isolated or disconnected from
the HAZARDOUS LIVE voltage before access.
NOTE National regulations may can require safety markings in a nationally accepted language.
Conformity is checked by inspection.
5.4.1 General
Replace the first paragraph with the following paragraph:
The following documentation necessary for safety purposes, as needed by the OPERATOR or
the RESPONSIBLE BODY, shall be provided with the equipment hand-held multimeter, in an
accepted language of the country where the product is intended to be placed on the market.

Safety documentation for service personnel authorized by the manufacturer shall be made
available to those personnel, in a language selected by the manufacturer.
Add the following two new items to the list:
aa) the documentation shall indicate that probe assemblies to be used for MAINS
measurements shall be RATED as appropriate for MEASUREMENT CATEGORY III or IV
according to IEC 61010-031 and shall have a voltage RATING of at least the voltage of the
circuit to be measured;
bb) information about each relevant MEASUREMENT CATEGORY (see 5.1.5.101). If the METER
hand-held multimeter has multiple MEASUREMENT CATEGORY RATINGS for the same
measuring circuit, the documentation shall clearly identify the MEASUREMENT CATEGORIES
where the equipment hand-held multimeter may be used and where it must shall not be
used.
– 14 – IEC 61010-2-033:2019 RLV © IEC 2019

6 Protection against electric shock

This clause of Part 1 is applicable except as follows:

6.5.1 General
Replace the text, the conformity statement, and Figure 4 with the following text, conformity

statement and Figure 4:
ACCESSIBLE parts shall be prevented from becoming HAZARDOUS LIVE in SINGLE FAULT

CONDITION. The primary means of protection (see 6.4) shall be supplemented by one of a) or

b). Alternatively, one of the single means of protection c) or d) shall be used. See Figure 4
and Annex D DD.
a) SUPPLEMENTARY INSULATION (see 6.5.3).
b) Current or voltage limiting device (see 6.5.6).
c) REINFORCED INSULATION (see 6.5.3).
D) PROTECTIVE IMPEDANCE (see 6.5.4).
Conformity is checked by inspection and as specified in 6.5.3, 6.5.4, or 6.5.6, as applicable.

Figure 4 – Acceptable combinations arrangement of protective
means against electric shock
6.5.2 PROTECTIVE BONDING
Replace the existing title and text of 6.5.2 with the following and delete the text:

6.5.2 Not used
6.5.5 Automatic disconnection of the supply

Replace the existing title and text of 6.5.5 with the following and delete the text:

6.5.5 Not used
6.6 Connections to external circuits

Add the following two 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 hand-held multimeter 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 of Part 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. These TERMINALS shall
also 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 a.c. r.m.s. RATED voltage, the test voltage is 5 000 V a.c. 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
Voltage on conductive parts of TERMINAL
CREEPAGE DISTANCE
V a.c. r.m.s. V d.c. mm
300 300 0,8
1,0
> 300 ≤ 600 > 300 ≤ 848
2,6
> 600 ≤ 1 000 > 848 ≤ 1 414
Voltage on conductive parts of TERMINAL CLEARANCE and CREEPAGE DISTANCE

V a.c. r.m.s. and V d.c. mm
≥ 30 ≤ 300 0,8
> 300 ≤ 600 1,0
> 600 ≤ 1 000 2,6
a
> 1 000 ≤ 1 500 2,8
a
Only for d.c. voltage.
Annex CC provides information regarding the recommended dimensions of 4-mm "banana"
TERMINALS.
– 16 – IEC 61010-2-033:2019 RLV © IEC 2019

Conformity is checked by inspection, by the determination of ACCESSIBLE parts, and 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
TERMINAL.
measuring circuit
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 maximum related RATED measurement frequency.
6.7.1.3 CREEPAGE DISTANCES
Add the following two new paragraphs after the third paragraph:
For hand-held multimeters not powered from the MAINS or the measuring circuit, CREEPAGE
DISTANCES according to material group I are allowed to be used for other materials.
For TERMINALS of hand-held multimeters intended to be connected only to a hand-held probe
assembly complying with Part 031, CREEPAGE DISTANCES according to material group I are
allowed to be used for the insulating materials of the TERMINALS.
6.7.1.5 Requirements for insulation according to type of circuit
Addition:
Add the following new item to the list:
aa) in K.101 for measuring circuits of MEASUREMENT CATEGORIES III and IV.

Replacement:
Replace existing Note 2 with the following note:
NOTE 2 Not used.
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:

TRANSIENT OVERVOLTAGE is above the level assumed for the
1) the maximum possible
MAINS CIRCUIT;
2) the WORKING VOLTAGE is the sum of voltages from more than one circuit, or is a mixed

voltage;
3) 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;
WORKING VOLTAGE has a frequency above 30 kHz;
4) the
5) the circuit is a measuring circuit where MEASUREMENT CATEGORIES do not apply;
RATED for MEASUREMENT CATEGORIES III and IV.
f) in Clause K.101 for measuring circuits
NOTE 2 These requirements are illustrated in the flowchart of Annex DD, Figure DD.1.
The TRANSIENT OVERVOLTAGE level for MAINS corresponds to the "required RATED impulse
voltage of equipment" value specified in Table 443.2 of IEC 60364-4-44:2007/AMD1:2015.
6.8.3.1 The a.c. voltage test
Replace the first sentence with the following sentence:
The voltage tester shall be capable of maintaining the test voltage throughout the test within
±5% of the specified value.
6.9 Constructional requirements for protection against electric shock
Add the following new subclause:
6.9.101 METER Hand-held multimeter RATINGS
Measuring circuit TERMINALS capable of TERMINALS of measuring circuits intended for MAINS
voltage measurements shall be RATED for a minimum of 300 V a.c. r.m.s. to earth, and a
minimum of MEASUREMENT CATEGORY III.
The RATED voltage of the TERMINALS of a measuring circuit TERMINALS capable of intended for
MAINS voltage measurements shall be equal to or higher than their RATED voltage to earth of
the TERMINALS.
NOTE These TERMINALS can also have other RATINGS for other functions.
Conformity is checked by inspection.
7 Protection against mechanical HAZARDS
This clause of Part 1 is applicable.
8 Resistance to mechanical stresses
This clause of Part 1 is applicable.

– 18 – IEC 61010-2-033:2019 RLV © IEC 2019

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 TRANSIENT OVERVOLTAGE limiting devices in
measuring circuits used to measure MAINS
If control of TRANSIENT OVERVOLTAGE is employed in a measuring circuit used to measure
MAINS, any overvoltage limiting component or circuit shall have adequate strength to limit
likely TRANSIENT OVERVOLTAGES in NORMAL USE.
Conformity is checked by applying 5 positive and 5 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 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. Resistance may be added in
series if needed to raise the impedance. The test impulse is applied in combination with the
MAINS voltage. The MAINS voltage is the highest RATED voltage of the measuring circuit
TERMINALS, but no more than 400 V a.c. r.m.s.
The test voltage is applied between each pair of TERMINALS, used to measure MAINS, where
voltage-limiting devices are present.
NOTE This test can be extremely hazardous. Explosion shields and other provisions can be used to protect
personnel performing the test.
No HAZARD shall arise due to the operation of overvoltage limiting component. The component
shall not rupture and shall operate as intended during the test. If the component is heated as
a result of this test, it shall not heat other materials to their ignition points. Tripping the circuit

breaker of the MAINS installation is an indication of failure. If the r
...

IEC 61010-2-033 ®
Edition 2.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Safety requirements for electrical equipment for measurement, control
and laboratory use –
Part 2-033: Particular requirements for hand-held multimeters for domestic
and professional use, capable of measuring MAINS voltage

Exigences de sécurité pour appareils électriques de mesurage, de régulation
et de laboratoire –
Partie 2-033: Exigences particulières pour les multimètres portatifs pour usage
domestique et professionnel, capables de mesurer la tension RESEAU

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IEC 61010-2-033 ®
Edition 2.0 2019-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colourcolour
insinsiidede
Safety requirements for electrical equipment for measurement, control

and laboratory use –
Part 2-033: Particular requirements for hand-held multimeters for domestic

and professional use, capable of measuring MAINS voltage

Exigences de sécurité pour appareils électriques de mesurage, de régulation

et de laboratoire –
Partie 2-033: Exigences particulières pour les multimètres portatifs pour usage

domestique et professionnel, capables de mesurer la tension RESEAU

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.080; 71.040.10 ISBN 978-2-8322-6995-4

– 2 – IEC 61010-2-033:2019 © IEC 2019
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 . 10
6 Protection against electric shock . 12
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 . 17
16 HAZARDS resulting from application . 17
17 RISK assessment . 17
101 Measuring circuits . 17
102 Indicating devices . 21
Annexes . 24
Annex K (normative) Insulation requirements not covered by 6.7 . 24
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 . 34
Annex CC (informative) 4-mm "banana" TERMINALS . 37
Annex DD (informative) Flowchart for insulation according to the type of circuit . 39
Bibliography . 42

Figure 4 – Acceptable arrangement of protective means against electric shock . 13
Figure AA.1 – Example to identify the locations of measuring circuits . 32
Figure CC.1 – Recommended dimensions of 4-mm TERMINALS . 38
Figure DD.1 – Requirements for CLEARANCE, CREEPAGE DISTANCE and solid insulation . 41

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 . 21
Table K.101 – CLEARANCES of measuring circuits RATED for MEASUREMENT CATEGORIES
III and IV . 25

Table K.102 – a.c. test voltages for testing electric strength of solid insulation in
measuring circuits RATED for MEASUREMENT CATEGORIES III and IV . 26
Table K.103 – Impulse test voltages for testing electric strength of solid insulation in
RATED for MEASUREMENT CATEGORIES III and IV . 26
measuring circuits
Table K.104 – Test voltages for testing long-term stress of solid insulation in
measuring circuits RATED for MEASUREMENT CATEGORIES III and IV . 27
Table K.105 – Minimum values for distance or thickness of solid insulation in
measuring circuits RATED for MEASUREMENT CATEGORIES III and IV . 28
Table AA.1 – Characteristics of MEASUREMENT CATEGORIES . 33

– 4 – IEC 61010-2-033:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-033: Particular requirements for hand-held multimeters
for domestic and professional use, capable of measuring MAINS voltage

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 61010-2-033 has been prepared by IEC technical committee 66:
Safety of measuring, control and laboratory equipment.
This second edition cancels and replaces the first edition published in 2012. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) The scope has been reduced to hand-held multimeters. Voltmeters and clamp multimeters
have been removed. They are addressed respectively by IEC 61010-2-030 and
IEC 61010-2-032. The relevant definitions have been removed.
b) Subclause 4.4.2.101 has been relocated into Clause 102.

c) CLEARANCES and CREEPAGE DISTANCES for WET LOCATIONS and for measuring circuit
TERMINALS exceeding 1 000 V a.c. or 1 414 V d.c. have been specified.
d) Subclause 14.101 related to "Circuits or components used as TRANSIENT OVERVOLTAGE
MAINS" has been removed.
limiting devices in measuring circuits used to measure
e) References to IEC 61010-031 for probe assemblies and IEC 61010-2-032 for current
sensors have been added.
f) Requirements for protection against MAINS overvoltage measuring circuits have been
added.
g) Clause 102 has been rewritten.
h) Requirements for measuring circuits from 1 000 V to 3 000 V have been added.
i) An informative Annex CC about dimensions of 4-mm banana TERMINALS has been added.
j) A 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
66/692/FDIS 66/694/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 61010 series, published under the general title Safety
requirements for electrical equipment for measurement, control, and laboratory use, can be
found on the IEC website.
This Part 2-033 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 and its Amendment 1
(2016), hereinafter referred to as Part 1.
This Part 2-033 supplements or modifies the corresponding clauses in IEC 61010-1 so as to
convert that publication into the IEC standard: Particular requirements for hand-held
multimeters for domestic and professional use, capable of measuring MAINS voltage.
Where a particular subclause of Part 1 is not mentioned in this Part 2-033, that subclause
applies as far as is reasonable. Where this Part 2-033 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 tests: 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).
– 6 – IEC 61010-2-033:2019 © IEC 2019
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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
Part 2-030 specifies the safety requirements for equipment with testing and measuring circuits
which are connected for test or measurement purposes to devices or circuits outside the
measurement equipment itself. Requirements of Part 2-030 have been included in this Part 2-
033. Equipment within the scopes of both Part 2-030 and Part 2-033 are considered to be
covered by the requirements of this Part 2-033.
Part 2-032 specifies the safety requirements for hand-held and hand-manipulated current
sensors. For equipment within the scope of Part 2-032 and Part 2-033, only Part 2-032 is
applicable.
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. For equipment within the scope of Part 2-033 and
Part 2-034, only Part 2-034 is applicable.

– 8 – IEC 61010-2-033:2019 © IEC 2019
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-033: Particular requirements for hand-held multimeters
for domestic and professional use, capable of measuring MAINS voltage

1 Scope and object
This clause of Part 1 is applicable except as follows:
1.1.1 Equipment included in scope
Replace the existing text with the following:
This part of IEC 61010 specifies safety requirements for hand-held multimeters for domestic
and professional use, capable of measuring MAINS.
Hand-held multimeters are multi-range multifunction measuring instruments intended to
measure voltage and other electrical quantities such as resistance or current. Their primary
purpose is to measure voltage on a live MAINS. They are suitable to be supported by one hand
during NORMAL USE.
1.1.2 Equipment excluded from scope
Add the following new item to the list and the following paragraph:
aa) IEC 61557-1 to IEC 61557-12, 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
HAND-HELD EQUIPMENT such as oscilloscopes, wattmeters, process control multimeters not
RATED for measuring voltage on a live MAINS, clamp multimeters and communications test sets
are not within the scope of this document.
1.2.1 Aspects included in scope
Add the following two new paragraphs at the end of the subclause:
Requirements for protection against HAZARDS resulting from NORMAL USE and REASONABLY
FORESEEABLE MISUSE of measuring circuits are given in Clause 101.
Requirements for reliance on the displayed value are given in Clause 102.
2 Normative references
This clause of Part 1 is applicable except as follows:
Replace "IEC 61010-031" with the following new reference:
IEC 61010-031:2015, Safety requirements for electrical equipment for measurement, control,
and laboratory use – Part 031: Safety requirements for hand-held and hand-manipulated
probe assemblies for electrical test and measurement
IEC 61010-031:2015/AMD1:2018
Replace "IEC 61180-1 (all parts)", "IEC 61180-1" and "IEC 61180-2", with the following new
reference:
IEC 61180, High-voltage test techniques for low-voltage equipment – Definitions, test and
procedure requirements, test equipment
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
Replace the definition of 3.5.4 with the following new definition:
3.5.4
MAINS
electricity supply system
Add the following new term and 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, except as follows:
4.3.2.5 MAINS supply
Replace the existing title and the text with:
4.3.2.5 Power supply
The following requirements apply.
a) The MAINS supply voltage shall be between 90 % and 110 % of any RATED supply voltage
for which the equipment can be set or, if the equipment is RATED for a greater fluctuation,
at any supply voltage within the fluctuation range.
b) The MAINS frequency shall be any RATED frequency.
c) Equipment for both a.c. and d.c. shall be connected to an a.c. or d.c. supply.
d) Equipment powered by single-phase a.c. MAINS supply shall be connected both with
normal and reverse polarity.
e) If the means of connection permits reversal, battery-operated and d.c. equipment shall be
connected with both reverse and normal polarity.

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4.3.2.6 Input and output voltages
Replace the first paragraph with the following:
Input and output voltages, including floating voltages but excluding the MAINS supply voltage,
shall be set to any voltage within the RATED voltage range, in normal and reverse polarity if
possible.
5 Marking and documentation
This clause of Part 1 is applicable except as follows:
5.1.2 Identification
Add the following note after the existing note:
NOTE 101 Some national regulations might require a marking to indicate the name and edition of the standard
used for compliance evaluation.
5.1.5 TERMINALS, connections, and operating devices
5.1.5.1 General
Replace the first paragraph with the following:
If necessary for safety, an indication shall be given of the purpose of TERMINALS, connectors,
controls, and indicators. Where there is insufficient space, symbol 14 from Table 1 may be
used.
5.1.5.2 TERMINALS
Replace the existing item d) with the following item d):
d) TERMINALS supplied from the interior of the hand-held multimeter and which could be
HAZARDOUS LIVE, with the voltage, current, charge or energy value or range, or with
symbol 12 of Table 1;
Add the following new item to the list:
aa) TERMINALS supplied from other TERMINALS which could be HAZARDOUS LIVE, with symbol 12
or 14 of Table 1.
Add the following new subclause:
TERMINALS
5.1.5.101 Measuring circuit
Measuring circuit TERMINALS shall be marked with the value of the RATED voltage to earth.
Each pair or set of measuring circuit TERMINALS that are intended to be used together shall be
marked with the value of the RATED voltage or the RATED current as applicable to the pair or
set of TERMINALS.
Measuring circuit TERMINALS are usually arranged 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 will have a RATED voltage to earth. For some hand-held multimeters, the
RATED voltage between TERMINALS may be different from the RATED voltage to earth. Markings
shall be clear to avoid misunderstanding.

TERMINALS of measuring circuits RATED for MAINS voltage measurements shall be additionally
marked "CAT lll" and/or "CAT IV" as applicable. Marking those TERMINALS with these two
types, and only these two types, of MEASUREMENT CATEGORY and its RATED voltage to earth, is
permissible. Marking MEASUREMENT CATEGORY II is not allowed.
Measuring circuit TERMINALS that do not have a RATING for connection to voltages above the
levels of 6.3.1, may be marked with alternative markings.
Measuring circuit TERMINALS which are dedicated only for connection to specific TERMINALS of
other equipment need not be marked provided that there is a means of identifying these
TERMINALS.
TERMINAL markings shall be visible when the hand-held multimeter is ready for NORMAL USE
with connectors and TERMINALS mated and shall reference the applicable TERMINALS.
Conformity is checked by inspection.
5.2 Warning markings
Replace the existing text with the following text:
Warning markings specified in in this document shall meet the following requirements.
Warning markings shall be visible when the hand-held multimeter is ready for NORMAL USE. If a
warning applies to a particular part of the hand-held multimeter, the marking shall be placed
on or near that part.
The size of warning markings shall be as follows.
a) Symbols shall be at least 2,75 mm high. Text shall be at least 1,5 mm high and contrast in
colour with the background.
b) Symbols or text moulded, stamped or engraved in a material shall be at least 2,0 mm
high. If not contrasting in colour, they shall have a depth or raised height of at least
0,5 mm.
If it is necessary for the RESPONSIBLE BODY or OPERATOR to refer to the instruction manual to
preserve the protection afforded by the hand-held multimeter, the hand-held multimeter shall
be marked with symbol 14 of Table 1. Symbol 14 is not required to be used together with
symbols which are explained in the manual.
If the instructions for use state that an OPERATOR is permitted to gain access, using a TOOL, to
a part which in NORMAL USE may be HAZARDOUS LIVE, there shall be a warning marking which
states that the hand-held multimeter shall be isolated or disconnected from the HAZARDOUS
LIVE voltage before access.
NOTE National regulations can require safety markings in a nationally accepted language.
Conformity is checked by inspection.
5.4.1 General
Replace the first paragraph with the following paragraph:
The following documentation necessary for safety purposes, as needed by the OPERATOR or
the RESPONSIBLE BODY, shall be provided with the hand-held multimeter, in an accepted
language of the country where the product is intended to be placed on the market. Safety
documentation for service personnel authorized by the manufacturer shall be made available
to those personnel, in a language selected by the manufacturer.

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Add the following two new items to the list:
aa) the documentation shall indicate that probe assemblies to be used for MAINS
measurements shall be RATED as appropriate for MEASUREMENT CATEGORY III or IV
according to IEC 61010-031 and shall have a voltage RATING of at least the voltage of the
circuit to be measured;
bb) information about each relevant MEASUREMENT CATEGORY (see 5.1.5.101). If the hand-held
multimeter has multiple MEASUREMENT CATEGORY RATINGS for the same measuring circuit,
MEASUREMENT CATEGORIES where the hand-
the documentation shall clearly identify the
held multimeter may be used and where it shall not be used.
6 Protection against electric shock
This clause of Part 1 is applicable except as follows:
6.5.1 General
Replace the text, the conformity statement, and Figure 4 with the following text, conformity
statement and Figure 4:
ACCESSIBLE parts shall be prevented from becoming HAZARDOUS LIVE in SINGLE FAULT
CONDITION. The primary means of protection (see 6.4) shall be supplemented by one of a) or
b). Alternatively, one of the single means of protection c) or d) shall be used. See Figure 4
and Annex DD.
a) SUPPLEMENTARY INSULATION (see 6.5.3).
b) Current or voltage limiting device (see 6.5.6).
c) REINFORCED INSULATION (see 6.5.3).
d) PROTECTIVE IMPEDANCE (see 6.5.4).
Conformity is checked by inspection and as specified in 6.5.3, 6.5.4, or 6.5.6, as applicable.

Figure 4 – Acceptable arrangement of protective means against electric shock
6.5.2 PROTECTIVE BONDING
Replace the existing title of 6.5.2 with the following and delete the text:
6.5.2 Not used
6.5.5 Automatic disconnection of the supply
Replace the existing title of 6.5.5 with the following and delete the text:
6.5.5 Not used
6.6 Connections to external circuits
Add the following two 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 hand-held multimeter 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. These TERMINALS shall
also 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

– 14 – IEC 61010-2-033:2019 © IEC 2019
touching the external parts of the TERMINAL in the least favourable position and the other
measuring circuit TERMINALS.
EXAMPLE For a 4 000 V a.c. r.m.s. RATED voltage, the test voltage is 5 000 V a.c. 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 TERMINAL CLEARANCE and CREEPAGE DISTANCE

V a.c. r.m.s. and V d.c. mm
≥ 30 ≤ 300 0,8
> 300 ≤ 600 1,0
> 600 ≤ 1 000 2,6
a
> 1 000 ≤ 1 500 2,8
a
Only for d.c. voltage.
Annex CC provides information regarding the recommended dimensions of 4-mm "banana"
TERMINALS.
Conformity is checked by inspection, by the determination of ACCESSIBLE parts, and 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 maximum related RATED measurement frequency.
6.7.1.3 CREEPAGE DISTANCES
Add the following two new paragraphs after the third paragraph:
For hand-held multimeters not powered from the MAINS or the measuring circuit, CREEPAGE
DISTANCES according to material group I are allowed to be used for other materials.
For TERMINALS of hand-held multimeters intended to be connected only to a hand-held probe
assembly complying with Part 031, CREEPAGE DISTANCES according to material group I are
allowed to be used for the insulating materials of the TERMINALS.

6.7.1.5 Requirements for insulation according to type of circuit
Replace the text with the following:
Requirements for insulation in particular types of circuits are specified as follows:
MAINS CIRCUITS of OVERVOLTAGE CATEGORY II with a nominal supply voltage up to
a) in 6.7.2 for
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 above the level assumed for the
MAINS CIRCUIT;
2) the WORKING VOLTAGE is the sum of voltages from more than one circuit, or is a mixed
voltage;
3) 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;
4) the WORKING VOLTAGE has a frequency above 30 kHz;
5) the circuit is a measuring circuit where MEASUREMENT CATEGORIES do not apply;
f) in Clause K.101 for measuring circuits RATED for MEASUREMENT CATEGORIES III and IV.
NOTE 2 These requirements are illustrated in the flowchart of Annex DD, Figure DD.1.
The TRANSIENT OVERVOLTAGE level for MAINS corresponds to the "required RATED impulse
voltage of equipment" value specified in Table 443.2 of IEC 60364-4-44:2007/AMD1:2015.
6.8.3.1 The a.c. voltage test
Replace the first sentence with the following sentence:
The voltage tester shall be capable of maintaining the test voltage throughout the test within
±5% of the specified value.
6.9 Constructional requirements for protection against electric shock
Add the following new subclause:
6.9.101 Hand-held multimeter RATINGS
TERMINALS of measuring circuits intended for MAINS voltage measurements shall be RATED for
a minimum of 300 V a.c. r.m.s. to earth, and a minimum of MEASUREMENT CATEGORY III.
The RATED voltage of the TERMINALS of a measuring circuit intended for MAINS voltage
measurements shall be equal to or higher than their RATED voltage to earth.
NOTE These TERMINALS can also have RATING for other functions.
Conformity is checked by inspection.

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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.
14.8 Circuits used to limit TRANSIENT OVERVOLTAGES
Replace the existing title of 14.8 with the following and delete the text:
14.8 Not used
Add the following new subclause:
14.101 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.
At minimum, one set of the test leads supplied with the hand-held multimeter shall be RATED
according to IEC 61010-031 for at least the highest voltage and MEASUREMENT CATEGORIES of
the hand-held multimeter.
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.
Add the following new Clause 101 and Clause 102:
101 Measuring circuits
101.1 General
The hand-held multimeter 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 electrical quantity that is within specification for any TERMINAL shall not cause a HAZARD
when it is applied to that TERMINAL or to any other compatible TERMINAL, with the range
and function settings set in any possible manner (see 101.3).
c) Any interconnections between the hand-held multimeter and other devices or accessories
intended to be used with the hand-held multimeter shall not cause a HAZARD even if the
documentation or markings prohibit the interconnection while the hand-held multimeter is
used for measurement purposes (see 6.6).
d) Other HAZARDS that could result from REASONABLY FORESEEABLE MISUSE shall be addressed
by RISK assessment (see Clause 16 and Clause 17).
e) A TEMPORARY OVERVOLTAGE or a TRANSIENT OVERVOLTAGE applied on the measuring circuit
TERMINALS in a voltage measurement function shall not cause a HAZARD (see 101.4).
Conformity is checked as specified in 6.6, Clause 16 and Clause 17, 101.2, 101.3 and 101.4,
as applicable.
101.2 Current measuring circuits
Current measuring circuits shall be so designed that, when range changing takes place, there
shall be no interruption which could cause a HAZARD.
Conformity is checked by inspection, and, in case of doubt, by causing the device to switch
the maximum RATED current 6 000 times.
Current measuring circuits intended for connection to current transformers without internal
protection shall be adequately protected to prevent a HAZARD arising from interruption of these
circuits during operation.
Conformity is checked by an overload test at a value of 10 times the maximum RATED current
for 1 s, and, if applicable, by causing the hand-held multimeter to switch the maximum RATED
current 6 000 times. No interruption which could cause a HAZARD shall occur during the tests.

– 18 – IEC 61010-2-033:2019 © IEC 2019
101.3 Protection against mismatches of inputs and ranges
101.3.1 General
In NORMAL CONDITION and in cases of REASONABLY FORESEEABLE MISUSE, no HAZARD shall arise
RATED voltage or current of a measuring circuit TERMINAL is applied to that
when the highest
TERMINAL or any other compatible TERMINAL, with any combination of function and range
settings.
NOTE Mismatches of inputs and ranges are examples of REASONABLY FORESEEABLE MISUSE, even if the
documentation or markings prohibit such mismatch. A typical example is inadvertent connection of a high voltage to
a measuring input intended for current or resistance. Possible HAZARDS include electric shock, burns, fire, arcing
and explosion.
TERMINALS that are clearly not of similar types and that will not retain the connectors of the
probe or accessory do not need to be tested and TERMINALS that can only be accessed by use
of a TOOL do not need to meet the requirement of 101.3.1.
The hand-held multimeter shall provide protection against these HAZARDS. One of the
following techniques shall be used.
a) Use of a certified overcurrent protection device to interrupt short-circuit currents before a
HAZARD arises. In this case, the requirements and test of 101.3.2 apply.
b) Use of an uncertified current limitation device, an impedance, or a combination of both to
prevent the HAZARD from arising. In this case, the requirements and tests of 101.3.3
apply.
Conformity is checked by inspection, evaluation of the design of the hand-held multimeter,
and as specified in 101.3.2 to 101.3.3, as applicable.
101.3.2 Protection by a certified
...