IEC 61010-2-032:2012

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

IEC 61010-2-032:2012 specifies safety requirements for HAND-HELD and hand-manipulated current sensors described below. These current sensors are for measuring, detecting or injecting current, or indicating current waveforms on circuits without physically opening the current path of the circuit being measured. They may be stand-alone current sensors or accessories to other equipment or parts of combined equipment (see Figure 101). These include measurement circuits which are part of electrical test and measurement equipment, laboratory equipment, or process control equipment. The existence of these current sensors and circuits in equipment requires additional protective means between the current sensor, the circuit and an OPERATOR. This third edition cancels and replaces the second edition published in 2002. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) A new Type D current sensor has been defined.
b) The terminology for MEASUREMENT CATEGORY I has changed. In this Part 2-032, it is termed "not RATED for measurements within MEASUREMENT CATEGORIES II, III, or IV".
c) Requirements for markings of measuring circuit TERMINALS and JAWS have been modified.
d) CLEARANCES and CREEPAGE DISTANCES have been added for unmated measuring circuit TERMINALS.
e) Requirements have been added for specialized measuring circuit TERMINALS.
f) The pull test for endcaps of flexible current sensors has been revised.
g) Requirements for output circuit leads have been revised.
h) Requirements have been added for temperature limits and resistance to heat to prevent thermal HAZARDS from eddy currents and high currents.
i) Requirements for circuits or components used as TRANSIENT OVERVOLTAGE limiting devices have been revised.
j) Requirements have been added for low battery indication.
k) Requirements have been revised and added pertaining to REASONABLY FORESEEABLE MISUSE of measuring circuits, including usage of the current sensor in a manner that might cause arc flash.
l) Requirements for MAINS voltage measuring circuits have been added.
m) Requirements to prevent HAZARDs from short-circuits have been revised and located in a new Clause 102.
n) ROUTINE TESTS have been modified.
o) Insulation requirements for measuring circuits have been primarily located in Annex K.
p) Annex AA has been added to describe the characteristics of MEASUREMENT CATEGORIES.
q) Annex BB has been added to describe HAZARDS that may be encountered when using measuring circuits.
This publication is to be read in conjunction with IEC 61010-1:2010.

Règles de sécurité pour appareils électriques de mesurage, de régulation et de laboratoire - Partie 2-032: Exigences particulières pour les capteurs de courant, portatifs et manipulés à la main, de test et de mesure électriques

La CEI 61010-2-032:2012 spécifie les exigences de sécurité pour les capteurs de courant PORTATIFS et manipulés à la main décrits ci-dessous. Ces capteurs de courant sont conçus pour mesurer, détecter ou injecter du courant, ou représenter les formes d'onde du courant sans ouverture physique du chemin du courant sur le circuit mesuré. Les capteurs de courant peuvent être autonomes, ou accessoires d'autres appareils ou parties d'appareils combinés (voir la Figure 101). Cela comprend les circuits de mesure qui font partie des appareils électriques d'essai et de mesure, du matériel de laboratoire, des appareils électriques de laboratoire ou des appareils de contrôle de procédés industriels. L'existence de ces capteurs de courant et circuits dans les appareils nécessite des moyens de protection supplémentaires entre le capteur de courant, le circuit et un OPERATEUR. Cette troisième édition annule et remplace la deuxième édition parue en 2002. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'année précédente:
a) Un nouveau Type D de capteur de courant a été défini.
b) La terminologie pour la CATEGORIE DE MESURE I a changé. Dans la présente Partie 2-032, elle est dite "non ASSIGNEE pour mesure en CATEGORIES DE MESURE II, III ou IV".
c) Les exigences pour les marquages des BORNES des circuits de mesure et des MACHOIRES ont été modifiées.
d) Des DISTANCES D'ISOLEMENT et des LIGNES DE FUITE ont été ajoutées pour les BORNES non connectées des circuits de mesure.
e) Des exigences ont été ajoutées pour les BORNES spécialisées des circuits de mesure.
f) L'essai de traction sur les capots d'extrémité des capteurs de courant flexibles a été revu.
g) Les exigences pour les cordons des circuits de sortie ont été revues.
h) Des exigences ont été ajoutées pour les limites de température et la tenue à la chaleur pour empêcher les DANGERS thermiques dus aux courants de Foucault et aux courants élevés.
i) Les exigences pour les circuits ou composants utilisés comme dispositifs de limitation contre les SURTENSIONS TRANSITOIRES ont été revues.
j) Des exigences ont été ajoutées pour l'indication de batterie faible.
k) Des exigences relatives aux MAUVAIS USAGES RAISONNABLEMENT PREVISIBLES de circuits de test et de mesure ont été revues et ajoutées, y compris l'utilisation du capteur de courant pouvant causer un arc électrique.
l) Des exigences pour les circuits de mesure RESEAU ont été ajoutées.
m) Les exigences pour empêcher les DANGERS dus aux courts-circuits ont été revues et placés dans un nouvel Article 102.
n) Les ESSAIS INDIVIDUELS DE SERIE ont été modifiés.
o) Les exigences d'isolation des circuits de mesure sont situées principalement dans l'Annexe K.
p) Une Annexe AA décrivant les caractéristiques des CATEGORIES DE MESURE a été ajoutée.
q) Une Annexe BB décrivant les DANGERS qui peuvent être rencontrés lors de l'utilisation de circuits de test et de mesure a été ajoutée.
Cette publication doit être lue conjointement avec la CEI 61010-1:2010.

General Information

• Status: Published
• Publication Date: 25-Sep-2012
• ICS: 19.080 - Electrical and electronic testing
• ICS: 29.160 - Rotating machinery
• 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: 21-Jun-2019
• Completion Date: 30-Jun-2017

Relations

• Revised: IEC 61010-2-032:2019 - 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
• Effective Date: 05-Sep-2023
• Revises: IEC 61010-2-032:2002 - 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
• Effective Date: 05-Sep-2023

Overview

IEC 61010-2-032:2012 is an international standard published by the International Electrotechnical Commission (IEC) that defines safety requirements for hand-held and hand-manipulated current sensors used in electrical test and measurement. These sensors are designed for measuring, detecting, or injecting current and for indicating current waveforms without physically interrupting the current path within electrical circuits. The standard ensures the protection of operators by specifying additional safety measures between current sensors, circuits, and users.

This third edition updates the previous 2002 version by introducing significant technical revisions addressing measurement categories, markings, mechanical tests, and hazard prevention. It complements the general safety requirements outlined in IEC 61010-1:2010.

Key Topics

• Scope and Application
  Focuses on hand-held and hand-manipulated current sensors as standalone devices or part of combined test, control, or laboratory equipment.

• Measurement Categories
  Clarifies terminology changes such as measurement category I now being defined as “not rated for measurements within categories II, III, or IV.” Additional annexes describe measurement categories and associated hazards.

• Mechanical and Electrical Safety

  • Clearances and creepage distances defined for unmated measuring circuit terminals.
  • Revised pull tests for flexible current sensor endcaps.
  • Protection against arc flash hazards and short-circuit risks have dedicated clauses.
  • Requirements for insulation primarily consolidated in Annex K.

• Marking and Documentation
  Updated rules for markings on measuring circuit terminals and sensor jaws to promote user safety and clear identification.

• Thermal and Overvoltage Protection
  Standards for temperature limits and heat resistance to prevent hazards from eddy currents and high currents. Transient overvoltage limiting components and circuits are regulated.

• User Safeguards
  Addition of low battery indication requirements and provisions to minimize risks from reasonably foreseeable misuse including hazardous use conditions.

• Routine Testing
  Enhanced testing procedures for durability, electrical strength, and protection measures to ensure reliability during product lifetime.

Applications

IEC 61010-2-032:2012 applies broadly to industries and laboratories using hand-held current sensors for:

• Electrical test and measurement instrumentation
• Process control and automation systems
• Laboratory analytical and diagnostic equipment
• Field service and maintenance tools requiring current sensing capabilities

The standard supports the design and manufacture of current sensors that ensure operator safety, increase product reliability, and minimize electric shock or mechanical hazards during electrical measurements.

Related Standards

• IEC 61010-1:2010 – General safety requirements for electrical equipment for measurement, control, and laboratory use; forms the foundational document for the Part 2 series.

• IEC 61010 Series – Covers safety for measuring, control, and laboratory equipment with various parts addressing particular equipment types such as temperature sensors or oscilloscopes.

• IEC 60950 / IEC 62368 – Standards related to safety of IT equipment can be relevant when current sensors are integrated into electronic devices.

• IEEE and UL Standards on Current Sensors – Complementary guidelines often used for compliance and certification in specific markets.

---

Keywords: IEC 61010-2-032, hand-held current sensors, electrical safety standard, electrical test equipment safety, measurement categories, arc flash protection, insulation requirements, electrical hazard prevention, hand-manipulated current sensors, laboratory and process control equipment safety.

Standards Content (Sample)

IEC 61010-2-032 ®
Edition 3.0 2012-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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

Règles de sécurité pour appareils électriques de mesurage, de régulation et de
laboratoire –
Partie 2-032: Exigences particulières pour les capteurs de courant, portatifs et
manipulés à la main, de test et de mesure électriques

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IEC 61010-2-032 ®
Edition 3.0 2012-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
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

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

laboratoire –
Partie 2-032: Exigences particulières pour les capteurs de courant, portatifs et

manipulés à la main, de test et de mesure électriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 19.080 ISBN 978-2-83220-405-4

– 2 – 61010-2-032 © IEC:2012
CONTENTS
FOREWORD . 4

INTRODUCTION . 7

1 Scope and object . 8

2 Normative references . 11

3 Terms and definitions . 11

4 Tests . 12

5 Marking and documentation . 12

6 Protection against electric shock . 16
7 Protection against mechanical HAZARDS . 22
8 Resistance to mechanical stresses . 23
8.1 General . 23
8.2 ENCLOSURE rigidity tests . 23
9 Protection against the spread of fire . 23
10 Equipment temperature limits and resistance to heat . 24
11 Protection against HAZARDS from fluids . 24
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure . 25
13 Protection against liberated gases and substances, explosion and implosion . 25
14 Components and subassemblies . 25
15 Protection by interlocks . 26
16 HAZARDS resulting from application . 26
17 RISK assessment . 26
101 Measuring circuits . 27
102 Prevention of HAZARD from arc flash and short-circuits . 30
102.1 General . 30
102.2 Protection against short-circuits during clamping . 31
102.3 Protection against short-circuits in closed position . 32
Annexes . 33
Annex D (normative) Parts between which insulation requirements are specified (see
6.4, 6.5.3, 6.9.101 and 6.9.103) . 33

Annex F (normative) ROUTINE TESTS . 35
Annex K (normative) Insulation requirements not covered by 6.7 . 36
Annex L (informative) Index of defined terms . 42
Annex AA (normative) MEASUREMENT CATEGORIES . 44
Annex BB (informative) HAZARDS pertaining to measurements performed in certain
environments . 46
Bibliography . 48

Figure 101 – Examples of current sensors and their parts . 10
Figure 102 – Pre-treatment of the JAW ENDS . 18
Figure 103 – CLEARANCE between the PROTECTIVE BARRIER or tactile indicator to the
JAWS and to the HAZARDOUS LIVE conductor . 19
Figure 104 – Treatment of the insulation of a flexible current sensor . 21

61010-2-032 © IEC:2012 – 3 –
Figure 105 – Pulley for the treatment of Figure 104 . 21

Figure 106 – Test probe to check protection against short-circuits . 31

Figure 107 – Use of the test probe of Figure 106 . 32

Figure D.101 – Parts of current sensors (see also Table D.101) . 33

Figure AA.1 – Example to identify the locations of measuring circuits . 45

Table 101 – CLEARANCES and CREEPAGE DISTANCES for measuring circuit TERMINALS

with HAZARDOUS LIVE conductive parts . 17

Table 102 – Pull forces for endcaps of flexible current sensors . 22

Table 103 – Energy level . 23
Table 104 – Impulse voltages . 26
Table 105 – Thickness of the test probe of Figure 106 and test voltages. 32
Table D.101 – Insulation requirements between circuits and ACCESSIBLE parts of
current sensors . 34
Table F.101 – Test voltages for ROUTINE TESTS of JAWS of current sensors . 35
Table K.101 – CLEARANCES for measuring circuits of MEASUREMENT CATEGORIES II, III
and IV . 37
Table K.102 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY II . 38
Table K.103 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY III . 38
Table K.104 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY IV . 39
Table K.105 – Test voltages for testing long term stress of solid insulation in
measuring circuits . 39
Table AA.1 – Characteristics of MEASUREMENT CATEGORIES . 45

– 4 – 61010-2-032 © IEC:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
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

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
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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 61010-2-032 has been prepared by IEC technical committee 66:
Safety of measuring, control and laboratory equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
66/474/FDIS 66/488/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 third edition cancels and replaces the second edition published in 2002. This edition
constitutes a technical revision.

61010-2-032 © IEC:2012 – 5 –
This edition includes the following significant technical changes with respect to the previous

edition:
a) A new Type D current sensor has been defined.

b) The terminology for MEASUREMENT CATEGORY I has changed. In this Part 2-032, it is

termed “not RATED for measurements within MEASUREMENT CATEGORIES II, III, or IV”.

c) Requirements for markings of measuring circuit TERMINALS and JAWS have been modified.

d) CLEARANCES and CREEPAGE DISTANCES have been added for unmated measuring circuit
TERMINALS.
e) Requirements have been added for specialized measuring circuit TERMINALS.

f) The pull test for endcaps of flexible current sensors has been revised.
g) Requirements for output circuit leads have been revised.
h) Requirements have been added for temperature limits and resistance to heat to prevent
thermal HAZARDS from eddy currents and high currents.
i) Requirements for circuits or components used as TRANSIENT OVERVOLTAGE limiting
devices have been revised.
j) Requirements have been added for low battery indication.
k) Requirements have been revised and added pertaining to REASONABLY FORESEEABLE
MISUSE of measuring circuits, including usage of the current sensor in a manner that
might cause arc flash.
l) Requirements for MAINS voltage measuring circuits have been added.
m) Requirements to prevent HAZARDs from short-circuits have been revised and located in a
new Clause 102.
n) ROUTINE TESTS have been modified.
o) Insulation requirements for measuring circuits have been primarily located in Annex K.
p) Annex AA has been added to describe the characteristics of MEASUREMENT CATEGORIES.
q) Annex BB has been added to describe HAZARDS that may be encountered when using
measuring circuits.
This Part 2-032 is intended to be used in conjunction with IEC 61010-1. It was established on
the basis of the third edition (2010). Consideration may be given to future editions of, or
amendments to, IEC 61010-1.
This Part 2-032 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 and
hand-manipulated current sensors for electrical test and measurement.

Where a particular subclause of Part 1 is not mentioned in this Part 2-032, 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;
– 6 – 61010-2-032 © IEC:2012
b) subclauses, figures, tables and notes which are additional to those in Part 1 are numbered

starting from 101; and additional list items are numbered from aa). Additional annexes are

numbered AA and BB.
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 web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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.
61010-2-032 © IEC:2012 – 7 –
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 2s of the standard which are to be read in conjunction with the Part 1 requirements.

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

and hand-manipulated current sensors (see Clause 1).

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.
Part 2-033 specifies the safety requirements for HAND HELD METERS that have a primary
purpose of measuring voltage on a live MAINS CIRCUIT.
Except for protective bonding, all requirements of Part 2-030 have been included into
Part 2-032. Equipment within the scopes of Part 2-030 and Part 2-032 are considered to be
covered by the requirements of Part 2-032. However, for equipment within the scope of both
Part 2-032 and Part 2-033, the two standards are to be read in conjunction.

– 8 – 61010-2-032 © IEC:2012
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

1 Scope and object
This clause of Part 1 is applicable except as follows:
1.1.1 Equipment included in scope
Replacement:
Replace the existing text with the following:
This part of IEC 61010 specifies safety requirements for HAND-HELD and hand-manipulated
current sensors described below.
These current sensors are for measuring, detecting or injecting current, or indicating current
waveforms on circuits without physically opening the current path of the circuit being
measured. They may be stand-alone current sensors or accessories to other equipment or
parts of combined equipment (see Figure 101). These include measurement circuits which are
part of electrical test and measurement equipment, laboratory equipment, or process control
equipment. The existence of these current sensors and circuits in equipment requires
additional protective means between the current sensor, the circuit and an OPERATOR.
NOTE 1 This part includes also the requirements of Part 2-030. Testing and measuring circuits that are not within
the scope of this part are considered to be covered by the requirements of Part 1 or other parts 2s of IEC 61010,
and then will also need to meet the requirements of these other parts with the exception of Part 2-030. Current
clamp meters and similar currents sensors that have a primary purpose of measuring voltage on a live MAINS
CIRCUIT are also within the scope of Part 2-033.
NOTE 2 Some current sensors are also known as current clamps and current probes.
Current sensors require hand manipulation before or after a test or measurement, but do not
necessarily need to be HAND-HELD during the test or measurement.
NOTE 3 Some current sensors designed for portable use can also be used for fixed installations.

The following types of current sensors are covered:
a) Type A: a current sensor designed to be applied around or removed from UNINSULATED
HAZARDOUS LIVE conductors. Type A current sensors have defined HAND-HELD or hand-
manipulated parts providing protection against electric shock from the conductor being
measured, and also have protection against short-circuits between wires and busbars
during clamping.
b) Type B: a current sensor which has protection against short-circuits between wires or
busbars during clamping but without defined HAND-HELD or hand-manipulated parts which
provide protection against electric shock during clamping. Additional protective means are
necessary to avoid electric shock from HAZARDOUS LIVE conductors which cannot be de-
energised during application or removal of the current sensor.
EXAMPLE 1 Flexible current sensors.
c) Type C: a current sensor without protection against short-circuits between wires or
busbars during clamping. Type C current sensors are intended to be applied to or removed

61010-2-032 © IEC:2012 – 9 –
from UNINSULATED HAZARDOUS LIVE conductors or from non-limited-energy circuit

conductors only when they are de-energised.

EXAMPLE 2 Split-core transducers.

d) Type D: a current sensor designed to be applied around or removed from insulated

conductors or from limited-energy circuit conductors.

A Type D current sensor does not need protection against short-circuits during clamping

and has no defined HAND-HELD or hand-manipulated parts providing protection against

electric shock from the conductor being measured.

EXAMPLE 3 Current probes for oscilloscopes and earth leakage current detectors.

NOTE 4 All current sensors can also be used around insulated conductors. In this case, HAZARDS are limited to
acceptable levels by the insulation of the conductors.

– 10 – 61010-2-032 © IEC:2012
1 3
Type A Type A
Current sensor as an accessory Current sensor with self-contained measuring functions
or with additional measuring functions
2 1
Type B Type C
Flexible current sensor Split-core current sensor

IEC  1865/12
Type D
Current sensor for non HAZARDOUS LIVE applications
(shown with a sliding JAW)
Key
1 JAW END(S)
2 JAW
3 measuring circuit TERMINALS
Figure 101 – Examples of current sensors and their parts
1.2.1 Aspects included in scope
Addition:
Add the following two new paragraphs at the end of the subclause:
Requirements for protection against HAZARDS resulting from NORMAL USE and REASONABLY
of measuring circuits are given in Clause 101.
FORESEEABLE MISUSE
0,00 A
61010-2-032 © IEC:2012 – 11 –
Requirements for prevention of HAZARD from arc flash and short-circuits are given in

Clause 102.
2 Normative references
This clause of Part 1 is applicable.

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 definition:
3.1.101
HAND-HELD
intended to be supported by one hand during NORMAL USE
3.2 Parts and accessories
Addition:
Add the following new definitions:
3.2.101
JAW
part of a current sensor which surrounds or partially surrounds the conductor under test
3.2.102
JAW END
part of the JAW where opening occurs while clamping around a conductor
3.5 Safety terms
Replacement:
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
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

– 12 – 61010-2-032 © IEC:2012
Addition:
Add the following new definition:

3.5.101
MEASUREMENT CATEGORY
classification of testing and measuring circuits according to the type of MAINS CIRCUITS to
which they are intended to be connected

Note 1 to entry: MEASUREMENT CATEGORIES take into account OVERVOLTAGE CATEGORIES, short-circuit current

levels, the location in the building installation at which 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.
3.6 Insulation
Addition:
Add the following new definition:
3.6.101
UNINSULATED
not insulated by solid insulation or insulated by solid insulation which does not meet the
requirements for BASIC INSULATION for the relevant voltage to earth
4 Tests
This clause of Part 1 is applicable except as follows:
4.4.2.8 Outputs
Replacement:
Replace the text with the following:
Outputs shall be open-circuited and short-circuited, one at a time.
5 Marking and documentation
This clause of Part 1 is applicable except as follows:

5.1.2 Identification
Addition:
Add the following new items and a new paragraph after the note to item b):
aa) for current sensors designed for use only with a specific model of equipment, a clear
identification of the equipment, or with symbol 14 of Table 1 if this information is
available only in the documentation;
bb) for Type A current sensors, with symbol 102 of Table 1;
cc) for Type B and Type C current sensors, with symbol 101 of Table 1;
dd) for Type D current sensors, symbol 101 of Table 1 is permitted with an additional
marking (see 5.1.5.102).
The relevant symbol (14, 101 or 102) shall be marked adjacent to the JAWS or the marking of
the MEASUREMENT CATEGORY for the JAWS, if present (see 5.1.5.101 and 5.1.5.102).

61010-2-032 © IEC:2012 – 13 –
Table 1 – Symbols
Addition:
Add the following new symbols:

Number Symbol Reference Description

Do not apply around or
remove from UNINSULATED
HAZARDOUS LIVE
conductors, which may
render electric shock,
electric burn, or arc flash
Application around and
removal from UNINSULATED
HAZARDOUS LIVE
conductors is permitted
5.1.5 TERMINALS, connections and operating devices
Addition:
Add the following new subclauses:
5.1.5.101 Measuring circuit TERMINALS
5.1.5.101.1 General
Except as permitted in 5.1.5.101.4:
a) the value of the RATED voltage to earth of measuring circuit TERMINALS shall be marked,
and
b) the value of the RATED voltage or the RATED current, as applicable, of each pair or set of
measuring circuit TERMINALS that are intended to be used together shall be marked, and
c) the pertinent MEASUREMENT CATEGORY for each individual, pair, or set of measuring circuit
TERMINALS or symbol 14 of Table 1 shall be marked as specified in 5.1.5.101.2 and
5.1.5.101.3, if applicable.
Measuring circuit TERMINALS are usually 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 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.
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 and
5.1.5.101.3, taking the exceptions in 5.1.5.101.4 into account.

– 14 – 61010-2-032 © IEC:2012
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 (see also 5.1.5.101.1).

Conformity is checked by inspection.

5.1.5.101.3 Measuring circuit TERMINALS RATED for connection to voltages above the
levels of 6.3.1
Symbol 14 of Table 1 shall be marked for measuring circuit TERMINALS RATED for connection to
voltages above the levels of 6.3.1, but that are not RATED for measurements within
MEASUREMENT CATEGORIES II, III or IV (see also 5.4.2 bb)).
Conformity is checked by inspection.
5.1.5.101.4 Low voltage, permanently connected, or dedicated measuring circuit
TERMINALS
Measuring circuit TERMINALS do not need to be marked if:
a) they are intended to be permanently connected and not ACCESSIBLE (see 5.4.3 aa)
and bb)), or
b) they are dedicated only for connection to specific TERMINALS of other equipment, or
c) it is obvious from other indications that the RATED voltage is below the levels of 6.3.1.
NOTE Examples of acceptable indications that the inputs are intended to be less than the levels of 6.3.1
include:
– the full scale deflection marking of a single-range indicating voltmeter or ammeter;
– the maximum range marking of a voltage selector switch;
– a marked voltage or power RATING expressed in dB, mW or W, where the equivalent value, as explained in
the documentation, is below 33 V a.c.
Conformity is checked by inspection.
RATINGS of JAWS
5.1.5.102 Voltage and current
Current sensors that are intended to be used on UNINSULATED conductors shall be marked

with the value of the RATED voltage to earth of the JAWS.
Current sensors that are intended to be used only on insulated conductors shall be marked to
indicate that the current sensor must not be used on UNINSULATED conductors, or with
symbol 14.
JAWS of Type A, Type B or Type C current sensors RATED for measurements within
MEASUREMENT CATEGORIES II, III or IV, shall be marked with the relevant MEASUREMENT
adjacent to the voltage to earth marking. The MEASUREMENT CATEGORY markings
CATEGORY
shall be “CAT II”, “CAT III” or “CAT IV” as applicable.
JAWS and output circuit TERMINALS of Type D current sensors shall not be marked with any
MEASUREMENT CATEGORY.
The value of the RATED current shall be marked. The nature of the current shall also be
marked unless the marked value applies to both a.c. and d.c. current.

61010-2-032 © IEC:2012 – 15 –
Conformity is checked by inspection.

5.4.2 Equipment RATINGS
Addition:
Add the following two 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 and 5.1.5.102);

bb) for current sensors 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 current
sensor for measurements on MAINS CIRCUITS, and a detailed RATING including TRANSIENT
OVERVOLTAGES (see AA.2.4 for more information).
If the current sensor has multiple MEASUREMENT CATEGORY RATINGS for the same measuring
circuit, the documentation shall clearly identify the MEASUREMENT CATEGORIES where the
current sensor is intended to be used and where it must not be used.
5.4.3 Equipment installation
Addition:
Add the following two new items to the list:
aa) for measuring circuit TERMINALS intended for permanent connection and RATED for
MEASUREMENT CATEGORIES II, III or IV, information regarding the MEASUREMENT
CATEGORY, RATED voltages or RATED currents as applicable (see 5.1.5.101 and
5.1.5.102);
bb) for measuring circuit TERMINALS intended for permanent connection and that are not
RATED for MEASUREMENT CATEGORIES II, III or IV, information regarding the RATED
voltages, RATED currents, and RATED TRANSIENT OVERVOLTAGES as applicable (see
5.1.5.101 and 5.1.5.102).
5.4.4 Equipment operation
Replacement:
Replace the existing text with the following:
Instructions for use shall include, if applicable:

a) identification and description of operating controls and their use in all operating modes;
b) for current sensors designed for use only with a specific model of equipment, a clear
identification of the equipment;
c) specifications of limits for intermittent operation;
d) specifications of limits of the current versus the frequency if the magnetic circuit can reach
a hazardous temperature;
e) explanations of symbols related to safety which are used on the equipment;
f) instructions for interconnection to accessories and other equipment, including indication of
suitable accessories and detachable parts;
g) instructions for replacement of consumable materials;
h) instructions for cleaning and decontamination;
i) instructions for the application and removal of the current sensor;

– 16 – 61010-2-032 © IEC:2012
j) instructions to de-energise the installation on which the current is measured, or to adopt

safe operating procedures when working on HAZARDOUS LIVE installations, during

application and removal of Type B current sensors;

k) instructions to de-energise the installation on which the current is measured, when

working on HAZARDOUS LIVE installations, or non-limited-energy installations during

application and removal of Type C current sensors;

l) instructions about the function of the tactile indicator or PROTECTIVE BARRIER, indicating the

limit of safe access of the HAND-HELD part;

m) a warning to the OPERATOR that Type D current sensors are only for use around insulated
conductors or limited energy circuit conductors;

n) a warning to the OPERATOR that individual protective equipment should be used if
HAZARDOUS LIVE parts in the installation where measurement is to be carried out could be
ACCESSIBLE;
o) a warning to the OPERATOR not to use a flexible current sensor if the wear indicator of the
flexible cord used for the JAW of the flexible current sensor is visible (see 6.9.101.4);
p) a warning to the OPERATOR not to use a current sensor if the wear indicator in the JAW END
is visible (see 6.9.101.3);
q) a warning to the OPERATOR not to use a current sensor above its RATED frequency, if the
magnetic circuit can reach a hazardous temperature (see 10.101).
There shall be a statement in the instructions that, if the current sensor is used in a manner
not specified by the manufacturer, the protection provided by the current sensor may be
impaired.
Conformity is checked by inspection.
6 Protection against electric shock
This clause of Part 1 is applicable except as follows:
6.1.2 Exceptions
Addition:
Add the following new item aa):
aa) conductive parts of a JAW END, provided that they meet the requirements of 6.9.101.
6.5.2 PROTECTIVE BONDING
Replacement:
Replace the title and text with:
6.5.2 (Void)
6.6 Connections to external circuits
Addition:
Add the following new subclauses:
6.6.101 Measuring circuit TERMINALS
TERMINAL which could become
Conductive parts of each unmated measuring circuit
HAZARDOUS LIVE when the highest RATED voltage is applied to other measuring circuit

61010-2-032 © IEC:2012 – 17 –
TERMINALS on the equipment shall be separated by at least 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).

Table 101 – CLEARANCES and CREEPAGE DISTANCES for measuring

circuit TERMINALS with HAZARDOUS LIVE conductive parts

CLEARANCE and
Voltage on conductive parts of TERMINAL
CREEPAGE DISTANCE
V a.c. r.m.s. V d.c. mm
≥ 33 ≤ 300 ≥ 70 ≤ 414 0,8
> 300 ≤ 600 > 414 ≤ 848 1,0
2,6
> 600 ≤ 1 000 > 848 ≤ 1 414
NOTE For WET LOCATIONS, there are no CLEARANCE and CREEPAGE
DISTANCE requirements for voltages between 16 V a.c. r.m.s. and 33 V
a.c. r.m.s., or between 35 V d.c. and 70 V d.c., but conductive parts of
unmated measuring circuit TERMINALS shall not be ACCESSIBLE. The values
in this table are not applicable to voltages below HAZARDOUS LIVE voltages
(see 6.3.1 a) ).
Conformity is checked by inspection and measurement.
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 RATED measurement frequency.
6.7.1.5 Requirements for insulation according to type of circuit
Addition:
Add the following new item ci) after item v) of the list of item e)
ci) the circuit is a measuring circuit where MEASUREMENT CATEGORIES do not apply.
Add the following new item aa) to the list:
aa) in K.101 for measuring circuits of MEASUREMENT CATEGORIES II, III and IV.

– 18 – 61010-2-032 © IEC:2012
Replacement:
Replace Note 2 with the following:

NOTE 2 (Void)
6.9 Constructional requirements for protection against electric shock

Addition:
Add the following new subclauses:

6.9.101 Insulation requirements for JAWS and JAW ENDS
6.9.101.1 Pre-treatment of the JAW ENDS
This pre-treatment shall be performed only for Type A and Type B current sensors RATED for
MEASUREMENT CATEGORIES III and IV.
The pre-treatment is performed to simulate the wear of the JAWS during insertion and removal.
It is not applicable to current sensors with a sliding JAW and to flexible current sensors.
in NORMAL CON
...