IEC 61010-2-030:2010

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

IEC 61010-2-030:2010 specifies safety requirements for testing and measuring circuits which are connected for test or measurement purposes to devices or circuits outside the measurement equipment itself. These include measurement circuits which are part of electrical test and measurement equipment, laboratory equipment, or process control equipment. The existence of these circuits in equipment requires additional protective means between the circuit and an OPERATOR. This Part 2-030 is to be used in conjunction with the latest edition of IEC 61010-1. It was established on the basis of the third edition (2010) of IEC 61010-1. Consideration may be given to future editions of, or amendments to, IEC 61010-1.
This publication is to be read in conjunction with IEC 61010-1:2010. The contents of the corrigendum of May 2011 have been included in this copy.

Règles de sécurité pour appareils électriques de mesurage, de régulation et de laboratoire - Partie 2-030: Exigences particulières pour les circuits de test et de mesure

La CEI 61010-2-030:2010 définit les exigences de sécurité pour les circuits de test et de mesure qui sont reliés à des fins d'essai ou de mesure à des dispositifs ou à des circuits externes à l'appareil de mesure même. Ceux-ci comprennent les circuits de mesure qui font partie d'appareils électriques d'essai et de mesure, d'appareils de laboratoire ou d'appareils de contrôle de processus. L'existence de ces circuits dans l'appareil exige des moyens de protection additionnels entre le circuit et un OPERATEUR. La présente Partie 2-030 doit être utilisée conjointement avec la dernière édition de la CEI 61010-1. Elle a été établie sur la base de la troisième édition (2010) de la CEI 61010-1. Les éditions ou amendements futurs de la CEI 61010-1 pourront être pris en considération.
Cette publication doit être lue conjointement avec la CEI 61010-1:2010. Le contenu du corrigendum de mai 2011 a été pris en considération dans cet exemplaire.

General Information

• Status: Published
• Publication Date: 09-Jun-2010
• 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
• Completion Date: 12-Jan-2017

Relations

• Revised: IEC 61010-2-030:2017 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-030: Particular requirements for equipment having testing or measuring circuits
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61010-2-030
®
Edition 1.0 2010-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


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

Règles de sécurité pour appareils électriques de mesurage, de régulation et
de laboratoire –
Partie 2-030: Exigences particulières pour les circuits de test et de mesure

IEC 61010-2-030:2010

---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
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All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
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IEC 61010-2-030
®
Edition 1.0 2010-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


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

Règles de sécurité pour appareils électriques de mesurage, de régulation et
de laboratoire –
Partie 2-030: Exigences particulières pour les circuits de test et de mesure

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
V
CODE PRIX
ICS 19.080; 71.040.10 ISBN 978-2-88910-988-3
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – 61010-2-030 © IEC:2010
CONTENTS
FOREWORD.4
1 Scope and object .7
2 Normative references.7
3 Terms and definitions .7
4 Tests .8
5 Marking and documentation .8
6 Protection against electric shock.9
7 Protection against mechanical HAZARDS .12
8 Resistance to mechanical stresses .12
9 Protection against the spread of fire .12
10 Equipment temperature limits and resistance to heat .12
11 Protection against HAZARDS from fluids .12
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure .12
13 Protection against liberated gases and substances, explosion and implosion.12
14 Components and subassemblies.12
15 Protection by interlocks .13
16 HAZARDS resulting from application .13
17 RISK assessment.13
101 Measuring circuits.13
Annexes .18
Annex K (normative) Insulation requirements not covered by 6.7 .18
Annex L (informative) Index of defined terms .24
Annex AA (normative) Measurement categories.25
Annex BB (informative) Hazards pertaining to measurements performed in certain
environments .28
Bibliography.31

Figure AA.1 – Example to identify the locations of measuring circuits .26

Table 101 – CLEARANCES and CREEPAGE DISTANCES for measuring circuit TERMINALS
with HAZARDOUS LIVE conductive parts .11
Table 102 – Impulse withstand voltages.13
Table K.101 – CLEARANCES for MEASUREMENT CATEGORIES II, III and IV .19
Table K.102 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY II .20
Table K.103 – Test voltages for solid insulation in measuring circuits of
MEASUREMENT CATEGORY III .20
Table K.104 – Test voltages for testing electric strength of solid insulation in
measuring circuits of MEASUREMENT CATEGORY IV .20
Table K.105 – Test voltages for testing long term stress of solid insulation in
measuring circuits.21
Table K.106 – Maximum TRANSIENT OVERVOLTAGES .23

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61010-2-030 © IEC:2010 – 3 –
Table AA.1 – Characteristics of MEASUREMENT CATEGORIES .27

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– 4 – 61010-2-030 © IEC:2010
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

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

Part 2-030: Particular requirements for testing and measuring circuits


FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to
promote international co-operation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, IEC publishes International Standards,
Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter
referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National
Committee interested in the subject dealt with may participate in this preparatory work. International,
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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
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly
indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts
and members of its technical committees and IEC National Committees for any personal injury, property
damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal
fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other
IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications
is indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61010-2-030 has been prepared by IEC technical committee
66: Safety of measuring, control and laboratory equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
66/417/FDIS 66/427/RVD

Full information on the voting for the approval of this standard can be found in the report
on voting indicated in the above table.
This Part 2-030 is to be used in conjunction with the latest edition of IEC 61010-1. It was
established on the basis of the third edition (2010) of IEC 61010-1. Consideration may be
given to future editions of, or amendments to, IEC 61010-1.

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61010-2-030 © IEC:2010 – 5 –
This Part 2-030 supplements or modifies the corresponding clauses in IEC 61010-1 so as
to convert that publication into the IEC standard: Particular requirements for testing and
measuring circuits.
Where a particular subclause of Part 1 is not mentioned in this part 2, that subclause
applies as far as is reasonable. Where this part states “addition”, “modification”,
“replacement”, or “deletion” the relevant requirement, test specification or note in Part 1
should be adapted accordingly.
In the second edition of IEC 61010-1, the requirements for testing and measuring circuits
were included in Part 1 itself. In the third edition of IEC 61010-1, these requirements have
been removed from Part 1 and have become the basis for the requirements in this Part 2.
In addition to the requirements removed from Part 1, the following major requirements
have been added to this standard. Numerous other changes have also been made.
MEASUREMENT CATEGORY I has changed. In this Part 2, it is termed
• The terminology for
“not rated for measurements within MEASUREMENT CATEGORIES II, III, or IV”.
• CLEARANCES and CREEPAGE DISTANCES have been added for unmated measuring circuit
TERMINALS.
• Requirements have been added for specialized measuring circuit TERMINALS.
• Requirements for TRANSIENT OVERVOLTAGE limiting devices have been revised.
• Requirements have been revised and added pertaining to REASONABLY FORESEEABLE
MISUSE of measuring circuits, including disconnection of the protective earth and usage
of the equipment in a manner that might cause arc flash.
• Insulation requirements for measuring circuits have been primarily located in Annex K.
• Annex AA has been added to describe the characteristics of MEASUREMENT CATEGORIES.
• Annex BB has been added to describe hazards that may be encountered when using
measuring circuits.
In this standard:
a) the following print types are used:
– requirements: in roman type;
– NOTES: in small roman type;
– conformity and test: in italic type;
– terms used throughout this standard which have been defined in Clause 3: SMALL
ROMAN CAPITALS;
b) subclauses, figures, tables and notes which are additional to those in Part 1 are
numbered starting from 101. Additional Annexes are 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.

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– 6 – 61010-2-030 © IEC:2010
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.

The contents of the corrigendum of May 2011 have been included in this copy.

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61010-2-030 © IEC:2010 – 7 –
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-030: Particular requirements for testing and measuring circuits



1 Scope and object
This clause of Part 1 is applicable except as follows:
1.1.1 Equipment included in scope
Replace the text with the following:
This part of IEC 61010 specifies safety requirements for testing and measuring circuits
which are connected for test or measurement purposes to devices or circuits outside the
measurement equipment itself.
These include measurement circuits which are part of electrical test and measurement
equipment, laboratory equipment, or process control equipment. The existence of these
circuits in equipment requires additional protective means between the circuit and an
OPERATOR.
NOTE 1 These testing and measuring circuits may, for example:
– measure voltages in circuits of other equipment,
– measure temperature of a separate device via a thermocouple,
– measure force on a separate device via a strain gauge,
– inject a voltage onto a circuit to analyze a new design.
NOTE 2 Testing and measuring circuits that are not within the scope of this Part 2 are considered to be
covered by the requirements of Part 1.
NOTE 3 Equipment containing these testing and measuring circuits may be intended for performing tests and
measurements on hazardous conductors, including MAINS conductors and telecommunication network
conductors. See Annex BB for considerations of HAZARDS involved in various tests and measurements.
2 Normative references
This clause of Part 1 is applicable.
3 Terms and definitions
This clause of Part 1 is applicable except as follows:
3.5 Safety terms
Add a 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

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– 8 – 61010-2-030 © IEC:2010
NOTE 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.
4 Tests
This clause of Part 1 is applicable.
5 Marking and documentation
This clause of Part 1 is applicable, except as follows:
5.1.5 TERMINALS, connections and operating devices
Add a new subclause:
5.1.5.101 Measuring circuit TERMINALS
5.1.5.101.1 General
Except as permitted in 5.1.5.101.4:
a) the RATED voltage to earth of measuring circuit TERMINALS shall be marked, and
b) 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 pair or set of measuring circuit
TERMINALS or symbol 14 of Table 1 of Part 1 shall be marked as specified in
5.1.5.101.2 and 5.1.5.101.3, if applicable.
NOTE 1 Measuring circuit TERMINALS are usually supplied in pairs or sets. Each pair or set of TERMINALS may
have a RATED voltage or a RATED current, or both, within that set, and each individual TERMINAL may have a
RATED voltage to earth. Some instruments may have a measurement RATED voltage (between TERMINALS)
different from the RATED voltage to earth. Markings should be clear to avoid misunderstanding.
Symbol 14 of Table 1 shall be marked if current measuring TERMINALS are not intended for
connection to current transformers without internal protection (see 101.2).
Markings shall be placed adjacent to the TERMINALS. However, if there is insufficient space
RATING plate or scale plate, or the
(as in multi-input equipment), the marking may be on the
TERMINAL may be marked with symbol 14 of Table 1.
NOTE 2 For any set of measuring circuit TERMINALS, symbol 14 of Table 1 does not need to be marked more
than once, if it is close to the TERMINALS.
Conformity is checked by inspection and, if applicable, as specified in 5.1.5.101.2 and
5.1.5.101.3, taking into account the exceptions in 5.1.5.101.4.
5.1.5.101.2 Measuring circuit TERMINALS RATED for MEASUREMENT CATEGORIES II, III
or IV
The relevant MEASUREMENT CATEGORY shall be marked for measuring circuit TERMINALS
RATED for measurements within MEASUREMENT CATEGORIES II, III or IV. The MEASUREMENT
CATEGORY markings shall be “CAT II”, “CAT III” or “CAT IV” as applicable.
NOTE Marking more than one type of MEASUREMENT CATEGORY and its RATED voltage to earth is permissible
(see also 5.1.5.101.1, Note 1).
Conformity is checked by inspection.

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61010-2-030 © IEC:2010 – 9 –
5.1.5.101.3 Measuring circuit TERMINALS RATED for connection to voltages above the
level of 6.3.1
Symbol 14 of Table 1 shall be marked for measuring circuit TERMINALS RATED for
connection to voltages above the levels of 6.3.1, but that are not RATED for measurements
within MEASUREMENT CATEGORIES II, III or IV (see also 5.4.1 bb)).
Conformity is checked by inspection.
5.1.5.101.4 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 or maximum
marking of a multi-range multimeter;
– the maximum range marking of a voltage selector switch;
– a marked voltage or power rating expressed in dB, mW or W, where the equivalent value, as explained
in the documentation, is below 33 V a.c.
5.4.1 General
Add new items to the list:
aa) information about each relevant MEASUREMENT CATEGORY if the measuring circuit has
a RATING for MEASUREMENT CATEGORY II, III or IV (see 5.1.5.101.2);
bb) for measuring circuits that do not have a RATING for MEASUREMENT CATEGORY II, III or
IV, but could be misused by connection to such circuits, a warning not to use the
equipment for measurements on MAINS CIRCUITS, and a detailed RATING including
TRANSIENT OVERVOLTAGES (see AA.2.4 for more information).
NOTE Some equipment may have multiple MEASUREMENT CATEGORY RATINGS for the same measuring circuit.
For such equipment, the documentation needs to clearly identify the MEASUREMENT CATEGORIES where the
equipment is intended to be used and where it must not be used.
5.4.3 Equipment installation
Add new items to the list:
aa) for permanently connected measuring circuit TERMINALS RATED for MEASUREMENT
CATEGORIES II, III or IV, information regarding the MEASUREMENT CATEGORY, RATED
maximum WORKING VOLTAGE, and RATED maximum current, as applicable (see
5.1.5.101);
bb) for permanently connected measuring circuit TERMINALS that are not RATED for
MEASUREMENT CATEGORIES II, III or IV, information regarding the RATED maximum
WORKING VOLTAGE, RATED maximum current, and RATED maximum TRANSIENT
OVERVOLTAGES as applicable (see 5.1.5.101).
6 Protection against electric shock
This clause of Part 1 is applicable except as follows:

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– 10 – 61010-2-030 © IEC:2010
6.1.2 Exceptions
Add a new item to the list:
aa) locking or screw-held type measuring TERMINALS, including TERMINALS which do not
require the use of a TOOL.
6.5.2.1 General
Replace the conformity statement with the following:
Conformity is checked as specified in 6.5.2.2 to 6.5.2.6 and 6.5.2.101.
6.5.2.3 PROTECTIVE CONDUCTOR TERMINAL
Replace h) 2) with the following h) 2):
h) 2) the PROTECTIVE BONDING shall not be interrupted by any switching or interrupting
device. Devices used for indirect bonding in test and measurement circuits (see
6.5.2.101) are permitted to be part of the PROTECTIVE BONDING.
Add a new subclause:
6.5.2.101 Indirect bonding for testing and measuring circuits
Indirect bonding establishes a connection between the PROTECTIVE CONDUCTOR TERMINAL
and ACCESSIBLE conductive parts if these become HAZARDOUS LIVE as a result of a fault.
Devices to establish indirect bonding are:
a) voltage limiting devices which become conductive when the voltage across them
exceeds the relevant levels of 6.3.2 a), with overcurrent protection to prevent
breakdown of the device;
Conformity is checked by connecting the ACCESSIBLE conductive parts to the MAINS
supply TERMINALS while the equipment is connected to the MAINS supply as in NORMAL
USE. The voltage between the ACCESSIBLE conductive parts and the PROTECTIVE
CONDUCTOR TERMINAL shall not exceed the relevant levels of 6.3.2 a) for more than
0,2 s.
b) voltage-sensitive tripping devices which interrupt all poles of the MAINS supply, and
connect the ACCESSIBLE conductive parts to the PROTECTIVE CONDUCTOR TERMINAL
whenever the voltage across them reaches the relevant levels of 6.3.2 a).
Conformity is checked by applying the relevant voltage level of 6.3.2 a) between the
ACCESSIBLE conductive parts and the PROTECTIVE CONDUCTOR TERMINAL. The tripping
action shall take place within 0,2 s.
6.6 Connections to external circuits
Add new subclauses:
6.6.101 Measuring circuit TERMINALS
Conductive parts of each unmated measuring circuit TERMINAL which could become
HAZARDOUS LIVE when the maximum RATED voltage is applied to other measuring circuit
TERMINALS on the equipment shall be separated by at least the 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.

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61010-2-030 © IEC:2010 – 11 –
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
0,8
≥33 ≤ 300 ≥70 ≤ 414
1,0
>300 ≤ 600 >414 ≤ 848
>600 ≤ 1 000 >848 ≤ 1 414 2,6
NOTE Values are determined by calculation for REINFORCED INSULATION. Transients are not taken into
account.
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 maximum 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:
RATED a.c. voltage at any RATED MAINS frequency;
a) maximum
b) maximum RATED d.c. voltage;
RATED a.c. voltage at the maximum RATED measurement frequency.
c) maximum
6.9 Constructional requirements for protection against electric shock
Add a new subclause:
6.9.101 Over-range indication
If a HAZARD could arise from an OPERATOR'S reliance on the value (for examp
...