FprEN IEC 61010-2-034:2023

SLOVENSKI STANDARD
oSIST prEN IEC 61010-2-034:2022
01-junij-2022
Varnostne zahteve za električno opremo za meritve, nadzor in laboratorijsko
uporabo - 2-034. del: Posebne zahteve za merilno opremo za izolacijsko upornost
in preskusno opremo za električno trdnost
Safety requirements for electrical equipment for measurement, control, and laboratory
use - Part 2-034: Particular requirements for measurement equipment for insulation
resistance and test equipment for electric strength
Sicherheitsbestimmungen für elektrische Mess-, Steuer-, Regel- und Laborgeräte - Teil 2
-034: Besondere Anforderungen für Prüf- und Messgeräte zur
Isolationswiderstandsmessung und Prüfausrüstung für die Spannungsfestigkeit
Exigences de sécurité pour appareils électriques de mesurage, de régulation et de
laboratoire - Partie 2-034: Exigences particulières applicables aux appareils de mesure
de la résistance d'isolement et aux appareils d'essai de rigidité diélectrique
Ta slovenski standard je istoveten z: prEN IEC 61010-2-034:2022
ICS:
19.080 Električno in elektronsko Electrical and electronic
preskušanje testing
71.040.10 Kemijski laboratoriji. Chemical laboratories.
Laboratorijska oprema Laboratory equipment
oSIST prEN IEC 61010-2-034:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 61010-2-034:2022

oSIST prEN IEC 61010-2-034:2022
66/756/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61010-2-034 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-04-01 2022-06-24
SUPERSEDES DOCUMENTS:
66/733/CD, 66/755/CC
IEC TC 66 : SAFETY OF MEASURING, CONTROL AND LABORATORY EQUIPMENT
SECRETARIAT: SECRETARY:
United Kingdom Mr David Hyde
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

TC 78,TC 85
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.

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

PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for
any other purpose without permission in writing from IEC.

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1 CONTENTS
2 CONTENTS . 2
3 FOREWORD. 4
4 CHANGES TO PREVIOUS EDITION . 6
5 INTRODUCTION . 7
6 1 Scope and object . 8
7 2 Normative references . 8
8 3 Terms and definitions . 10
9 4 Tests . 10
10 5 Marking, documentation and HAZARD indicator . 11
11 6 Protection against electric shock . 14
12 7 Protection against mechanical HAZARDS . 22
13 8 Resistance to mechanical stresses . 22
14 9 Protection against the spread of fire and arc flash . 22
15 10 Equipment temperature limits and resistance to heat . 27
16 11 Protection against HAZARDS from fluids and solid foreign objects . 27
17 12 Protection against radiation, including laser sources, and against sonic and
18 ultrasonic pressure . 27
19 13 Protection against liberated gases and substances, explosion and implosion . 27
20 14 Components and subassemblies . 28
21 15 Protection by interlocks . 28
22 16 HAZARDS resulting from application . 28
23 17 RISK assessment . 28
24 101 Measuring circuits . 28
25 Annexes . 31
26 Annex A . 31
27 Annex K (normative) Insulation requirements not covered by 6.7 . 31
28 Annex L (informative) Index of defined terms . 44
29 Annex AA (normative) MEASUREMENT CATEGORIES . 45
30 Annex BB (informative) HAZARDS pertaining to measurements performed in certain
31 environments . 48
32 Annex CC (informative) 4-mm "banana" TERMINALS . 51
33 Annex DD (informative) Flowchart for insulation according to the type of circuit . 53
34 Annex EE (informative) Determination of CLEARANCES for Table 101 . 56
35 Bibliography . 57
37 Figure 101 – Duration of current flow versus body current for a.c. and d.c. currents . 16
38 Figure 102 – Test circuit for induced voltage and current . 27
39 Figure K.101 – Circuit with protective screen . 35
40 Figure K.102 – Circuit with DOUBLE INSULATION . 35
41 Figure K.103 – Test circuit for evaluation of TRANSIENT OVERVOLTAGE attenuation . 38
42 Figure AA.1 – Example to identify the locations of MEASUREMENT CATEGORIES . 46
43 Figure CC.1 – Recommended dimensions of 4-mm TERMINALS . 52

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44 Figure DD.1 – Requirements for CLEARANCE, CREEPAGE DISTANCE and solid insulation . 55
46 Table 101 – CLEARANCES for unmated measuring circuit TERMINALS . 17
47 Table K.15 – CLEARANCE values for the calculation of K.3.2 . 32
48 Table K.16 – Test voltages based on CLEARANCES . 33
49 Table K.101 - Impulse voltages for circuits connected to MAINS . 37
50 Table K.102 - CLEARANCES for measuring circuits RATED for MEASUREMENT CATEGORIES . 39
51 Table K.103 – Impulse test voltages for testing electric strength of solid insulation for
52 measuring circuits RATED for MEASUREMENT CATEGORIES . 40
53 Table K.104 – a.c. test voltages for testing electric strength of solid insulation for
54 measuring circuits RATED for MEASUREMENT CATEGORIES . 40
55 Table K.105 – Minimum values for distance or thickness of solid insulation for
56 measuring circuits RATED for MEASUREMENT CATEGORIES . 41
57 Table AA.1 – Characteristics of MEASUREMENT CATEGORIES . 47
58 Table EE.1 – CLEARANCES values for Table 101 . 56
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60 INTERNATIONAL ELECTROTECHNICAL COMMISSION
61 ____________
63 SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
64 FOR MEASUREMENT, CONTROL, AND LABORATORY USE –
66 Part 2-034: Particular requirements for measurement equipment
67 for insulation resistance and test equipment for electric strength
69 FOREWORD
70 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all
71 national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co -
72 operation on all questions concerning standardization in the electrical and electronic fields. To this end and in
73 addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
74 Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their preparation
75 is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
76 participate in this preparatory work. International, governmental and non-governmental organizations liaising with
77 the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
78 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
79 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
80 consensus of opinion on the relevant subjects since each technical committee has representation from all interested
81 IEC National Committees.
82 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
83 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
84 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
85 misinterpretation by any end user.
86 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
87 transparently to the maximum extent possible in their national and regional publications. Any divergence between
88 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
89 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
90 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services
91 carried out by independent certification bodies.
92 6) All users should ensure that they have the latest edition of this publication.
93 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
94 members of its technical committees and IEC National Committees for any personal injury, property damage or
95 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses
96 arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
97 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
98 indispensable for the correct application of this publication.
99 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
100 rights. IEC shall not be held responsible for identifying any or all such patent rights.
101 International Standard IEC 61010-2-034 has been prepared by IEC technical committee 66:
102 Safety of measuring, control and laboratory equipment.
103 It has the status of a group safety publication in accordance with IEC Guide 104.
104 This second edition cancels and replaces the first edition published in 2017. This edition
105 constitutes a technical revision.
106 The text of this International Standard is based on the following documents:
FDIS Report on voting
66/xxx/FDIS 66/xxx/RVD
108 Full information on the voting for the approval of this International Standard can be found in the
109 report on voting indicated in the above table.

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110 This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
111 A list of all parts of the IEC 61010 series, under the general title Safety requirements for electrical
112 equipment for measurement, control, and laboratory use, can be found on the IEC website.
113 This Part 2-034 is to be used in conjunction with IEC 61010-1:2010/AMD1:2016. It was
114 established on the basis of the third edition (2010) of IEC 61010-1, including its amendment 1
115 (2016) and its corrigendum 1 (2019).
116 This Part 2-034 supplements or modifies the corresponding clauses in IEC 61010-1 so as to
117 convert that publication into the IEC standard: Particular requirements for measurement
118 equipment for insulation resistance and test equipment for electric strength.
119 Where a particular subclause of Part 1 is not mentioned in this Part 2-034, that subclause applies
120 as far as is reasonable. Where this part states “addition”, “modification”, “replacement”, or
121 “deletion” the relevant requirement, test specification or note in Part 1 should be adapted
122 accordingly.
123 In this standard:
124 a) the following print types are used:
125 – requirements: in roman type;
126 – NOTES: in small roman type;
127 – conformity and tests: in italic type;
128 – terms used throughout this standard which have been defined in Clause 3: SMALL ROMAN
129 CAPITALS;
130 b) subclauses, figures, tables and notes which are additional to those in Part 1 are numbered
131 starting from 101. Additional annexes are lettered starting from AA and additional list items
132 are lettered from aa).
133 The committee has decided that the contents of this document will remain unchanged until the
134 stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
135 the specific document. At this date, the document will be
136 • reconfirmed,
137 • withdrawn,
138 • replaced by a revised edition, or
139 • 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.
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141 CHANGES TO PREVIOUS EDITION
142 This edition includes numerous editorial changes and the following significant technical changes
143 with respect to the previous edition.
144 a) 1.2.1: requirements for protection against HAZARDS which could occur from reading a voltage
145 have been added to the scope.
146 b) Clause 2: all normative references have been dated; new normative references have been
147 added.
148 c) 4.3.2.5: requirements for power supply have been modified.
149 d) 4.3.2.6: requirements for inputs/outputs have been modified.
150 e) 5.1.5.101.2: minimum RATINGS for voltage of measuring TERMINALS are required.
151 f) 5.4.2: new information about RATINGS in documentation have been added.
152 g) 5.4.4: new instructions for operation have been added.
153 h) 5.101.1: HAZARD indicators shall be functional in NORMAL CONDITION and in SINGLE FAULT
154 CONDITION.
155 i) 6.6.101.1: insulating material of group I may be allowed for determination of CREEPAGE
156 DISTANCES of measuring circuit TERMINALS.
157 j) 6.6.101.2: CLEARANCES and CREEPAGE DISTANCES above 1 000 V a.c. and 1 500 V d.c. for
158 measuring circuit TERMINALS in unmated position have been defined.
159 k) 6.6.101.3: requirements for measuring circuit TERMINALS in partially-mated position have
160 been specified.
161 l) 6.6.101.4: requirements for measuring circuit TERMINALS in mated position have been
162 specified.
163 m) 6.102 replaces 6.9.103 and has been rephrased.
164 n) A new 9.101 to consider the protection of measuring circuits against the spread of fire and
165 arc flash has been added. Table 102 has been replaced by Table K.101.
166 o) 9.101.2 is a relocation of 101.3.
167 p) 9.101.3 is a relocation of 101.4 It has been extended to MEASUREMENT CATEGORY II and refers
168 to IEC 61000-4-5 for tests.
169 q) 9.101.4 is a relocation of 16.1.102.
170 r) 9.101.5 is a relocation of K.103 for induced current and has numerous changes.
171 s) 14.101 has been removed. Consequently, 14.102 becomes 14.101.
172 t) 101.3 and 101.4 having been moved to 9.101.2 and 9.101.3, 101.5 becomes 101.3 with more
173 protections against HAZARD occurring from reading a voltage value.
174 u) K.2.1: another method for determination of CLEARANCES of secondary circuits is proposed.
175 v) K.3.101 is a relocation of 6.9.104.
176 w) Clause K.102 is a relocation with clarifications of Clause K.103.
177 x) Table K.103 and Table K.104 replace Table K.102, Table K.103 and Table K.104.
178 y) K.101.4 has been reviewed. Tables and tests for solid insulation have been modified. Table
179 K.105 replaces Table K.9.
180 z) Table K.106 has been replaced by Table K.101.
181 aa) Clause K.4 has been completely redrafted and propose now a method to determine U for
t
182 circuits which reduce TRANSIENT OVERVOLTAGES.
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184 INTRODUCTION
185 IEC 61010-1 specifies the safety requirements that are generally applicable to all equipment
186 within its scope. For certain types of equipment, the requirements of IEC 61010-1 and its
187 amendment will be supplemented or modified by the special requirements of one, or more than
188 one, Part 2 which are read in conjunction with the Part 1 requirements.
189 This Part 2-034 specifies the safety requirements for measurement equipment for insulation
190 resistance and test equipment for electric strength which are connected to units, lines or circuits
191 for test or measurement purposes.
192 Part 2-030 specifies the safety requirements for equipment with testing or measuring circuits
193 which are connected for test or measurement purposes to devices or circuits outside the
194 measurement equipment itself.
195 Part 2-032 specifies the safety requirements for HAND-HELD and hand-manipulated current
196 sensors for measuring, detecting or injecting current, or indicating current waveforms on circuits
197 without physically opening the current path of the circuit being measured.
198 Part 2-033 specifies the safety requirements for hand-held multimeters for domestic and
199 professional use, capable of measuring MAINS voltage, intended to measure voltage and other
200 electrical quantities such as resistance or current.
201 All requirements of Part 2-030 have been included into Part 2-034. Equipment within the scopes
202 of both Part 2-030 and Part 2-034 are considered to be covered by the requirements of this
203 Part 2-034.
204 However, for equipment within the scope of Part 2-032, Part 2-033 and Part 2-034, these
205 standards are read in conjunction.
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207 SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
208 FOR MEASUREMENT, CONTROL, AND LABORATORY USE –
210 Part 2-034: Particular requirements for measurement equipment
211 for insulation resistance and test equipment for electric strength
215 1 Scope and object
216 This clause of Part 1 is applicable except as follows:
217 1.1.1 Equipment included in scope
218 Replace the existing text with the following:
219 This group safety publication is primarily intended to be used as a product safety standard for
220 the products mentioned in the scope, but shall also be used by technical committees in the
221 preparation of their publications for products similar to those mentioned in the scope of this
222 standard, in accordance with the principles laid down in IEC Guide 104 and lSO/lEC Guide 51.
223 This part of IEC 61010 specifies safety requirements to equipment for measuring insulation
224 resistance and to equipment for testing electric strength which have an output voltage exceeding
225 50 V a.c. or 120 V d.c.
226 This document also applies to combined measuring equipment which has an insulation resistance
227 measurement function or an electric strength test measurement function.
228 1.1.2 Equipment excluded from scope
229 Add the following new items to the list:
230 aa) IEC 61557-8, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and
231 1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures –
232 Part 8: Insulation monitoring devices for IT systems;
233 bb) IEC 61557-9, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and
234 1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures –
235 Part 9: Equipment for insulation fault location in IT systems.
236 1.2.1 Aspects included in scope
237 Replace the third paragraph with the following new paragraph:
238 Requirements for protection against HAZARDS arising from NORMAL USE, REASONABLY FORESEEABLE
239 MISUSE and ergonomic factors are specified in Clause 16 and Clause 101.
240 2 Normative references
241 This clause of Part 1 is applicable except as follows:
242 Replace the following existing normative references:
243 IEC 60364-4-44:2007, Low-voltage electrical installations – Part 4-44: Protection for safety –
244 Protection against voltage disturbances and electromagnetic disturbances IEC 60364-4-
245 44:2007/AMD1:2015
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246 IEC 61010-031, Safety requirements for electrical equipment for measurement, control and
247 laboratory use – Part 031: Safety requirements for hand-held probe assemblies for electrical
248 measurement and test
249 IEC 61180 (all parts), High-voltage test techniques for low-voltage equipment
250 IEC 61180-1, High-voltage test techniques for low-voltage equipment – Part 1: Definitions, test
251 and procedure requirements
252 IEC 61180-2, High-voltage test techniques for low-voltage equipment – Part 2: Test equipment
253 IEC 61672-1, Electroacoustics – Sound level meters – Part 1: Specifications
254 IEC 61672-2, Electroacoustics – Sound level meters – Part 2: Pattern evaluation tests
255 with the following new normative references:
256 IEC 60364-4-44:2007/AMD1:2015/AMD2:2018, Low-voltage electrical installations – Part 4-44:
257 Protection for safety – Protection against voltage disturbances and electromagnetic disturbances
258 IEC 61010-031:2023 , Safety requirements for electrical equipment for measurement, control
259 and laboratory use – Part 031: Safety requirements for hand-held and hand-manipulated probe
260 assemblies for electrical test and measurement
261 IEC 61180:2016, High-voltage test techniques for low-voltage equipment – Definitions, test and
262 procedure requirements, test equipment
263 NOTE IEC 61180:2016 replaces everywhere IEC 61180, IEC 61180-1 and IEC 61180-2 are referenced in Part 1.
264 IEC 61672-1:2013, Electroacoustics – Sound level meters – Part 1: Specifications
265 IEC 61672-2:2013/AMD1:2017, Electroacoustics – Sound level meters – Part 2: Pattern
266 evaluation tests
267 Add the following new normative references:
268 IEC 60479-1:2018, Effects of current on human beings and livestock - Part 1: General aspects
269 IEC 60479-2:2019, Effects of current on human beings and livestock - Part 2: Special aspects
270 IEC 60664-1:2020, Insulation coordination for equipment within low-voltage supply systems -
271 Part 1: Principles, requirements and tests
272 IEC 61000-4-5:2014/AMD1:2017, Electromagnetic compatibility (EMC) - Part 4-5: Testing and
273 measurement techniques - Surge immunity test
274 IEC 61010-2-032:2019, Safety requirements for electrical equipment for measurement, control,
275 and laboratory use – Part 2-032: Particular requirements for hand-held and hand-manipulated
276 current sensors for electrical test and measurement
———————
Under preparation. Stage at the time of publication: IEC 61010-031/Ed.3/CDV.

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277 3 Terms and definitions
278 This clause of Part 1 is applicable except as follows:
279 3.5 Safety terms
280 Replace the definition of 3.5.4 with the following new definition:
281 3.5.4
282 MAINS
283 electricity supply system
284 Add the following new term and definition:
285 3.5.101
286 MEASUREMENT CATEGORY
287 classification of testing and measuring circuits according to the type of MAINS to which they are
288 intended to be connected
289 Note 1 to entry: MEASUREMENT CATEGORIES take into account OVERVOLTAGE CATEGORIES, short-circuit current levels,
290 the location where the test or measurement is to be made and some forms of energy limitation or transient protection
291 included in the building installation (see Annex AA for more information).
292 4 Tests
293 This clause of Part 1 is applicable except as follows:
294 4.3.2.5 MAINS supply
295 Replace the existing title and text with:
296 4.3.2.5 Power supply
297 The following requirements apply:
298 a) the MAINS supply voltage shall be between 90 % and 110 % of any RATED supply voltage for
299 which the equipment can be set or, if the equipment is RATED for a greater fluctuation, at any
300 supply voltage within the fluctuation range;
301 b) the MAINS frequency shall be any RATED frequency;
302 c) equipment for both a.c. and d.c. shall be connected to an a.c. or d.c. supply;
303 d) equipment powered by single-phase a.c. MAINS supply shall be connected both with normal
304 and reverse polarity;
305 e) if the means of connection permit reversal, battery-operated and d.c. equipment shall be
306 connected with both reverse and normal polarity.
307 4.3.2.6 Input and output voltages
308 Replace the existing title and text with:
309 4.3.2.6 Input and output voltages or currents
310 Input and output voltages or currents, including floating voltages but excluding the MAINS supply
311 voltage, shall be set to any voltage or current within their RATED range, in normal and reverse
312 polarity if possible.
313 Add the following new subclause:

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314 4.4.2.15 Surge protective devices
315 Surge protective devices shall be short-circuited and open-circuited.
316 5 Marking and documentation
317 Replace the existing title with:
318 5 Marking, documentation and HAZARD indicator
319 This clause of Part 1 is applicable except as follows:
320 5.1.5 TERMINALS, connections and operating devices
321 Add the following new subclause:
322 5.1.5.101 Measuring circuit TERMINALS
323 5.1.5.101.1 General
324 Some measuring circuit TERMINALS for the equipment within the scope of this standard also serve
325 as output TERMINALS.
326 Except as permitted in 5.1.5.101.5:
327 a) the value of the RATED voltage to earth of measuring circuit TERMINALS shall be marked, and
328 b) the value of the RATED voltage or the RATED current, as applicable, of each pair or set of
329 measuring circuit TERMINALS that are intended to be used together shall be marked, and
330 c) the pertinent MEASUREMENT CATEGORY for each individual, pair, or set of measuring circuit
331 TERMINALS, or symbol 14 of Table 1 shall be marked as specified in 5.1.5.101.2 and
332 5.1.5.101.3, if applicable.
333 Measuring circuit TERMINALS are usually arranged in pairs or sets. Each pair or set of TERMINALS
334 may have a RATED voltage or a RATED current, or both, within that set, and each individual
335 TERMINAL may have a RATED voltage to earth. For some equipment, the RATED voltage between
336 TERMINALS may be different from the RATED voltage to earth. Markings shall be clear to avoid
337 misunderstanding.
338 Symbol 14 of Table 1 shall be marked if current measuring TERMINALS are not intended for
339 connection to current transformers without internal protection (see 101.2).
340 Markings shall be placed adjacent to the TERMINALS. However, if there is insufficient space (as in
341 multi-input equipment), the marking may be on the RATING plate or scale plate, or the TERMINAL
342 may be marked with symbol 14 of Table 1.
343 For any set of measuring circuit TERMINALS, symbol 14 of Table 1 does not need to be marked
344 more than once, if it is close to the TERMINALS.
345 Conformity is checked by inspection and, if applicable, as specified in 5.1.5.101.2, 5.1.5.101.3
346 and 5.1.5.101.4, taking the exceptions in 5.1.5.101.5 into account.
347 5.1.5.101.2 Measuring circuit TERMINALS RATED for MEASUREMENT CATEGORIES
348 The relevant MEASUREMENT CATEGORY shall be marked for TERMINALS of measuring circuits RATED
349 for MEASUREMENT CATEGORIES. The MEASUREMENT CATEGORY markings shall be "CAT II", "CAT III"
350 or "CAT IV" as applicable.

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351 The RATED voltage of the TERMINALS of a measuring circuit intended for MAINS voltage
352 measurements shall be equal to or higher than their RATED a.c. line-to-neutral or d.c. voltage.
353 NOTE CLEARANCES are specified for a nominal a.c. r.m.s. line-to-neutral or d.c. voltage of MAINS being measured (see
354 Table K.102 and Annex I). Neutral is considered to be earthed.
355 Marking those TERMINALS with more than one type of MEASUREMENT CATEGORY and its RATED
356 voltage is permissible.
357 Conformity is checked by inspection.
358 5.1.5.101.3 Measuring circuit TERMINALS RATED for connection to voltages above the
359 levels of 6.3.1
360 Symbol 14 of Table 1 shall be marked for measuring circuit TERMINALS RATED for connection to
361 voltages above the levels of 6.3.1, but that are not RATED for MEASUREMENT CATEGORIES (see also
362 5.4.1 bb)).
363 Conformity is checked by inspection.
364 5.1.5.101.4 HAZARDOUS LIVE output TERMINALS
365 Output TERMINALS of measurement equipment for insulation resistance and test equipment for
366 electric strength which can be HAZARDOUS LIVE shall be marked with symbol 12 of Table 1 in close
367 proximity to those TERMINALS.
368 Conformity is checked by inspection.
369 5.1.5.101.5 Measuring circuit TERMINALS which are permanently connected, dedicated or
370 for non-HAZARDOUS LIVE voltages
371 Measuring circuit TERMINALS do not need to be marked if:
372 a) they are intended to be permanently connected and not ACCESSIBLE (see 5.4.3 aa) and bb)),
373 or
374 b) they are dedicated only for connection to specific TERMINALS of other equipment, or
375 c) it is obvious from other indications that the RATED voltage does not exceed the levels of 6.3.1.
376 NOTE Examples of acceptable indications that the inputs are intended to do not exceed the levels of 6.3.1
377 include:
378 – the full scale deflection marking of a single-range indicating voltmeter or ammeter or maximum marking of a
379 multi-range multimeter;
380 – the maximum range marking of a voltage selector switch;
381 – a marked voltage or power RATING expressed in dB, mW or W, where the equivalent value, as explained in
382 the documentation, does not exceed 30 V a.c.
383 Conformity is checked by inspection.
384 5.4.1 GENERAL
385 Add the following two new items to the list and a new paragraph at the end of the list:
386 aa) information about each relevant MEASUREMENT CATEGORY if the measuring circuit is RATED
387 for MEASUREMENT CATEGORIES (see 5.1.5.101.2);
388 bb) for measuring circuits that are not RATED for MEASUREMENT CATEGORIES, but that could be
389 misused by connection to such circuits, a warning not to use the equipment for
390 measurements on MAINS, and a detailed RATING including TRANSIENT OVERVOLTAGES (see
391 AA.2.4 for more information).

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392 Some equipment may have multiple MEASUREMENT CATEGORY RATINGS for the same measuring
393 circuit. For such equipment, the documentation shall clearly identify the MEASUREMENT
394 CATEGORIES where the equipment is intended to be used and where it shall not be used.
395 5.4.2 Equipment RATINGS
396 Add the following three new items to the list:
397 aa) the output voltage or voltage range, frequency and current RATING;
398 bb) for insulation resistance measurement equipment, the RATED line or unit capacitance as
399 required by 6.102;
400 cc) for insulation resistance measurement equipment intended for use in power station or
401 substation, the RATED induced current.
402 5.4.3 Equipment installation
403 Add the following two new items to the list:
404 aa) for measuring circuit TERMINALS intended for permanent connection and that are RATED for
405 MEASUREMENT CATEGORIES, information regarding the MEASUREMENT CATEGORY, RATED
406 voltages or RATED currents as applicable (see 5.1.5.101.2);
407 bb) for measuring circuit TERMINALS intended for permanent connection and that are not RATED
408 for MEASUREMENT CATEGORIES, information regarding the RATED voltages, RATED currents,
409 and RATED TRANSIENT OVERVOLTAGES as applicable (see 5.1.5.101.5).
410 5.4.4 Equipment operation
411 Add the following three new items to the list:
412 aa) instructions for a daily or routine check to ensure the correct functionality of the equipment
413 before use when one HAZARD indicator has been considered to be sufficient (see 5.101.1);
414 bb) when performing an a.c. voltage test, instructions to warn the OPERATOR that a hazardous
415 residual voltage can be present after the interruption of the test if the capacitance value of
416 the line or unit under test exceeds the maximum RATED line or unit capacitance value (see
417 6.102.3);
418 cc) when an automatic operation to energise the equipment outputs is provided, a warning to
419 keep distance from the unit under test.
420 Add the following new subclause:
421 5.101 HAZARD indicator
422 5.101.1 General
423 At least one of the following HAZARD indicators shall be provided and functional in NORMAL
424 CONDITION and in SINGLE FAULT CONDITION of the indicator. One indicator is considered to be
425 sufficient if the manufacturer’s instructions or markings require a daily or routine check to ensure
426 the correct functionality of the equipment before use.
427 a) Indicator light
428 Where an indicator light is provided, it shall illuminate or flash when there are HAZARDOUS
429 LIVE voltages present on the TERMINALS. It may start illuminating or flashing at any point the
430 output is activated.
431 The indicator light shall be red in colour.
432 If the indicator light flashes, the frequency shall be 50 cycles per minute to 300 cycles per
433 minute. The duty cycle shall be at least 40 %.
434 Conformity is checked by inspection and measurement.
435 b) Variable visible indicator

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436 Where a variable visible indicator with contrasting colours is provided, it shall operate when
437 there are HAZARDOUS LIVE voltages present on the TERMINALS. It may start operating at any
438 point the output is activated.
439 The visible indicator shall have equally spaced areas of significantly contrasting colours
440 and/or patterns.
441 Conformity is checked by inspection.
442 c) Audible indicator
443 Where an audible indicator is provided, it shall produce a sound with a minimum constant
444 sound pressure level of 70 dBA and a frequency of the fundamental wave lower than 5 kHz
445 to warn the OPERATOR or a bystander when there are HAZARDOUS LIVE voltages present on the
446 TERMINALS. It may start producing a sound at any point the output is activated.
447 Conformity is checked by measuring the maximum A-weighted sound pressure level at the
448 OPERATOR'S position and at bystander positions. The following conditions apply.
449 1) During measurement, the equipment is fitted and operated as in NORMAL USE.
450 2) Sound level meters used in the measurement conform either to type 1 of IEC 61672-
451 1:2013 or, if an integrating sound level meter, to type 1 of IEC 61672-2:2013/AMD1:2017.
452 3) The distance between any wall or any other object and the surface of the equipment is
453 not less than 3 m.
454 5.101.2 HAZARD indicator light for fixed equipment
455 Where the equipment can be permanently installed, provision shall be made to connect an
456 external HAZARD indicator light.
457 The power source for the external indicator light may be separated from the equipment.
458 Conformity is checked by inspection.
459 6 Protection against electric shock
460 This clause of Part 1 is applicable except as follows:
461 6.5.2.1 General
462 Replace the conformity statement with the following:
463 Conformity is checked as specified in 6.5.2.2 to 6.5.2.6 and 6.5.2.101.
464 6.5.2.3 Protective conductor TERMINAL
465 Replace h) 2) with the following:
466 h) 2) the PROTECTIVE BONDING shall not be interrupted by any switching or interrupting device.
467 Devices used for indirect bonding in testing and measuring circuits (see 6.5.2.101) are
468 permitted to be part of the PROTECTIVE BONDING.
469 Add the following new subclause and figure:
470 6.5.2.101 Indirect bonding for testing and measuring circuits
471 Indirect bonding establishes a connection between the PROTECTIVE CONDUCTOR TERMINAL and
472 ACCESSIBLE conductive parts if these become HAZARDOUS LIVE as a result of a fault.
473 Devices to establish indirect bonding are the following:

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474 a) Voltage limiting devices which become conductive when the voltage across them exceeds the
475 relevant levels of 6.3.2 a), with overcurrent protection to prevent breakdown of the device.
476 The duration versus the current shall not exceed the levels of Figure 101.
477 Conformity is checked by connecting the ACCESSIBLE conductive parts to the minimum and
478 the maximum HAZARDOUS LIVE voltage according to the equipment RATINGS while the
479 equipment is operated in NORMAL USE. The current between the ACCESSIBLE conductive parts
480 and the PROTECTIVE CONDUCTOR TERMINAL is measured with the circuit of Figure A.1.
481 b) Voltage-sensitive tripping devices which interrupt all poles of the MAINS supply or the
482 HAZARDOUS LIVE voltage source, and connect the ACCESSIBLE conductive parts to the
483 PROTECTIVE CONDUCTOR TERMINAL whenever the voltage across them reaches the relevant
484 levels of 6.3.2 a). The tripping duration versus the current shall not exceed the levels of
485 Figure 101.
486 Conformity is checked by applying successively the relevant voltage level of 6.3.2 a) and the
487 maximum RATED voltage between the ACCESSIBLE conductive parts and the PROTECTIVE
488 CONDUCTOR TERMINAL. The current between the ACCESSIBLE conductive parts and the
489 PROTECTIVE CONDUCTOR TERMINAL is measured with the circuit of Figure A.1.
490 Voltage limiting devices or voltage-sensitive tripping devices as defined in a) and b), shall have
491 at least the voltage and current RATINGS of the measuring TERMINALS.
492 Conformity is checked by inspection.

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10 000
1 000
A B
0,1
1 10 100 1 000 10 000
I (mA)
IEC
494 Key
495 A current a.c. (mA)
496 B current d.c. (mA)
497 NOTE This figure is based on Figure 20 for a.c. currents and Figure 22 for d.c. currents of IEC 60479-1:2018, and
498 Figure 22 of IEC 60479-2:2019.
499 Figure 101 – Duration of current flow versus body current
500 for a.c. and d.c. currents
502 6.6 Connections to external circuits
503 Add the following new subclause and table:
504 6.6.101 Measuring circuit TERMINALS
505 6.6.101.1 General
506 When determining the values of CREEPAGE DISTANCES for measuring circuit TERMINALS of HAND-
507 HELD EQUIPMENT intended to be connected only to a hand-held probe assembly complying with
508 IEC 61010-031:2023 , the applicable values of CREEPAGE DISTANCES from material group I are
509 allowed to be applied to all material groups.
———————
Under preparation. Stage at the time of publication: IEC 61010-031/Ed.3/CDV.
t (ms)
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510 Requirements for measuring circuit TERMINALS in unmated position, partially-mated or mated
511 position are defined respectively in 6.6.101.2, 6.6.101.3 and 6.6.101.4. Requirements for
512 specialized measuring circuit TERMINALS are defined in 6.6.101.5.
513 Annex CC provides information regarding the recommended dimensions of 4 mm "banana"
514 TERMINALS.
515 6.6.101.2 Measuring circuit TERMINALS in unmated position
516 The following requirements apply to measuring circuits TERMINALS in unmated position when
517 RATED voltages are applied to any other TERMINALS of the equipment or energized from inside the
518 equipment.
519 1) ACCESSIBLE parts of locking-type or screw-held-type TERMINALS in unmated position including
520 TERMINALS which do not require the use of a TOOL for unlocking or unscrewing shall not be
521 HAZARDOUS LIVE.
522 Conformity is checked by inspection.
523 2) ACCESSIBLE parts of unmated TERMINALS which are separated from other circuits and can be
524 energized only from inside of the equipment by continuou
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