oSIST prEN IEC 81346-14:2025

Industrial systems, installations and equipment and industrial products - Structuring principles and reference designation - Part 14: Manufacturing and processing systems

Industrielle Systeme, Anlagen und Ausrüstungen und Industrieprodukte - Strukturierungsprinzipien und Referenzkennzeichnung - Teil 14: Fertigungssysteme

Systèmes, installations et équipements industriels, et produits industriels - Principes de structuration et désignations de référence - Partie 14: Systèmes de fabrication et de traitement

Industrijski sistemi, inštalacije in oprema ter industrijski izdelki - Načela strukturiranja in referenčne oznake - 14. del: Proizvodni in predelovalni sistemi

General Information

• Status: Not Published
• Public Enquiry End Date: 14-Jul-2025
• ICS: 01.110 - Technical product documentation
• ICS: 29.020 - Electrical engineering in general
• Technical Committee: EDO - Documentation and graphical symbols
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 06-May-2025
• Due Date: 23-Sep-2025
• Completion Date: 18-Jul-2025
• Ref Project: prEN IEC 81346-14:2025 - Industrial systems, installations and equipment and industrial products - Structuring principles and reference designation - Part 14: Manufacturing and processing systems

Overview

prEN IEC 81346-14:2025 (Industrial systems, installations and equipment and industrial products - Structuring principles and reference designation - Part 14: Manufacturing and processing systems) specifies structuring principles and a reference designation system for manufacturing and processing systems (RDS‑MS). Published as a Committee Draft for Vote (CDV) in 2025, this part is intended to be used together with IEC 81346‑1:2022 and aligned with IEC/ISO classification parts (e.g., ISO/IEC 81346‑10, ‑12). Its scope covers concepts and rules to consistently name, structure and present manufacturing systems across mechanical, electrical and process domains.

Key topics and requirements

• Core concepts: definitions for object, aspect, system (prime, technical, component), function, product, location, type, and object occurrence.
• Structuring principles: guidance for forming structures based on different aspects:
  • Function‑oriented
  • Product‑oriented
  • Location‑oriented
  • Type‑oriented
  • Multi‑aspect structures combining the above
• Reference designation construction:
  • Rules for single‑level and multi‑level designations
  • Use of letter codes and format conventions
  • Guidance on reference designation sets and top‑node identifiers
• Location and labelling: methods for designation of locations, assemblies and presentation of identifiers.
• Presentation of properties: recommended ways to present object properties alongside designations.
• Annexes:
  • Annex AA (normative) - classification letter codes for classes of prime and technical systems used in manufacturing.
  • Annex BB (informative) - practical examples (process flow, block diagrams, structure trees) illustrating RDS‑MS usage.

Practical applications

• Standardizes naming and structuring for:
  • Process plants, production lines, material handling systems, and supporting utilities.
• Enables consistent documentation across disciplines (mechanical, electrical, control, process).
• Supports engineering lifecycle activities:
  • Planning, design, commissioning, operation, maintenance and spare‑parts management.
• Improves interoperability in CAD/PLM, technical documentation, asset management and digital twin implementations by providing a harmonized reference designation system.

Who should use this standard

• Systems engineers, plant designers and process engineers
• Technical authors and documentation specialists
• System integrators, maintenance and reliability teams
• CAD/PLM and asset‑management professionals
• Standards committees and procurement/specification writers seeking consistent structuring rules for manufacturing systems

Related standards

• IEC 81346‑1:2022 (general rules) - this part is designed to be read in conjunction with IEC 81346‑1.
• ISO/IEC parts on classification (e.g., ISO/IEC 81346‑10, ‑12) for prime/technical system classification and mapping.

Keywords: IEC 81346‑14, reference designation system, RDS‑MS, manufacturing and processing systems, structuring principles, classification letter codes, reference designation.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2025
Industrijski sistemi, inštalacije in oprema ter industrijski izdelki - Načela
strukturiranja in referenčne oznake - 14. del: Proizvodni in predelovalni sistemi
Industrial systems, installations and equipment and industrial products - Structuring
principles and reference designation - Part 14: Manufacturing and processing systems
Systèmes, installations et équipements industriels, et produits industriels - Principes de
structuration et désignations de référence - Partie 14: Systèmes de fabrication et de
traitement
Ta slovenski standard je istoveten z: prEN IEC 81346-14:2025
ICS:
01.110 Tehnična dokumentacija za Technical product
izdelke documentation
29.020 Elektrotehnika na splošno Electrical engineering in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

3/1708/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 81346-14 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-04-25 2025-07-18
SUPERSEDES DOCUMENTS:
3/1675/CD, 3/1705A/CC
IEC TC 3 : DOCUMENTATION, GRAPHICAL SYMBOLS AND REPRESENTATIONS OF TECHNICAL INFORMATION
SECRETARIAT: SECRETARY:
Sweden Mr Mikael Törnkvist
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 3 Horizontal
TC 44,TC 65,SC 65A,SyC SM
ASPECTS CONCERNED:
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.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Industrial systems, installations and equipment and industrial products - Structuring principles and
reference designation - Part 14: Manufacturing and processing systems

PROPOSED STABILITY DATE: 2031
NOTE FROM TC/SC OFFICERS:
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.

– 2 – IEC CDV 81346-14 © IEC 2025
1 CONTENTS
4 FOREWORD . 4
5 INTRODUCTION . 6
6 1 Scope . 8
7 2 Normative references . 8
8 3 Terms and definitions . 8
9 4 General concepts . 10
10 4.1 Object . 10
11 4.2 Aspect . 10
12 4.3 Systems . 10
13 4.3.101 Prime systems . 10
14 4.3.102 Technical systems . 10
15 4.3.103 Component systems . 10
16 4.4 Structuring . 10
17 4.5 Function . 10
18 4.6 Products and components . 11
19 4.7 Location . 11
20 4.8 Types . 11
21 4.9 Object occurrences and product individuals . 11
22 4.10 Relations between concepts . 11
23 5 Structuring principles . 11
24 5.1 General . 11
25 5.2 Forming structures . 11
26 5.3 Function-oriented structure . 11
27 5.4 Product-oriented structure . 11
28 5.5 Location-oriented structure . 11
29 5.6 Type-oriented structure . 12
30 5.7 Structures based on "other aspects" . 12
31 5.8 Structures based on more than one aspect . 12
32 6 Construction of reference designations . 12
33 6.1 General . 12
34 6.2 Format of reference designations . 12
35 6.2.1 Single level . 12
36 6.2.2 Multi-level . 12
37 6.2.3 Use of letter codes . 12
38 6.3 Different structures within the same aspect . 14
39 7 Reference designation set . 14
40 8 Designation of locations . 14
41 8.1 General . 14
42 8.2 Assemblies . 15
43 9 Presentation of reference designations . 15
44 9.1 Reference designation . 15
45 9.2 Reference designation set . 15
46 9.3 Presentation of identifiers for the top-node . 15
47 10 Labelling . 15

IEC CDV 81346-14 © IEC 2025 – 33 –
48 11 Presentation of properties for an object . 15
49 12 Application of the reference designation system . 15
50 Annexes . 16
51 Annex AA (normative) Classification letter codes for systems . 17
52 AA.1 General . 17
53 AA.2 Classes of prime systems for manufacturing . 17
54 AA.3 Classes of technical systems . 18
55 Annex BB (informative) Example of reference designation within a system . 24
56 Bibliography . 28
58 Figure 101 – Relation between prime systems, technical systems and component
59 systems . 13
60 Figure 102 – Relation between construction complexes, construction entities and
61 construction spaces . 14
62 Figure BB.1 – Process flow diagram for a material handling plant . 24
63 Figure BB.2 – Overview diagram of part of the material process system (=M1) and part
64 of the power supply system (=B1) supporting the material processing system . 25
65 Figure BB.3 – Structure tree for parts of the material handling plant . 26
66 Figure BB.4 – Example of designation of technical systems of a prime system (=M1) in a
67 block diagram for a chemical plant . 27
69 Table 101 – Examples of using ? in a class code . 13
70 Table 102 – Examples of reference designations . 13
71 Table 103 – Application of annexes of IEC 81346-1:2022 . 16
72 Table AA.1 – Classes of prime systems for manufacturing . 17
73 Table AA.2 – Classes of technical systems . 18
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77 INTERNATIONAL ELECTROTECHNICAL COMMISSION
78 ____________
80 Industrial systems, installations and equipment and industrial products —
81 Structuring principles and reference designations
83 Part 14: Manufacturing and processing systems
87 FOREWORD
88 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
89 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
90 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
91 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
92 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
93 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
94 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
95 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
96 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
97 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
98 consensus of opinion on the relevant subjects since each technical committee has representation from all
99 interested IEC National Committees.
100 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
101 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
102 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
103 misinterpretation by any end user.
104 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
105 transparently to the maximum extent possible in their national and regional publications. Any divergence between
106 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
107 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
108 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
109 services carried out by independent certification bodies.
110 6) All users should ensure that they have the latest edition of this publication.
111 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
112 members of its technical committees and IEC National Committees for any personal injury, property damage or
113 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
114 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
115 Publications.
116 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
117 indispensable for the correct application of this publication.
118 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
119 rights. IEC shall not be held responsible for identifying any or all such patent rights.
120 IEC 81346-14 has been prepared by IEC technical committee 3: Documentation, graphical
121 symbols and representations of technical information, in close cooperation with ISO technical
122 committee 10: Technical product documentation. It is an International Standard.
123 It is published as a double logo standard and has the status of a horizontal publication in
124 accordance with IEC Guide 108.
IEC CDV 81346-14 © IEC 2025 – 55 –
126 The text of this standard is based on the following documents:
FDIS Report on voting
3/xxx/FDIS 3/xxx/RVD
128 Full information on the voting for its approval can be found in the report on voting indicated in
129 the above table. In ISO, the standard has been approved by xx members out of xx having cast
130 a vote.
131 The language used for the development of this International Standard is English.
132 This document is to be read in conjunction with IEC 81346-1:2022. The provisions of the general
133 rules dealt with in IEC 81346-1:2022 are only applicable to this document insofar as they are
134 specifically cited. When this document states “addition”, “modification” or “replacement”, the
135 relevant text in IEC 81346-1:2022 is to be adapted accordingly.
136 Subclauses that are numbered with a 101 (102, 103, etc.) suffix are additional to the same
137 subclause in IEC 81346-1:2022.
138 Tables and figures in this document that are new are numbered starting with 101.
139 New annexes in this document are lettered AA, BB, etc.
140 A list of parts of the 81346 International Standard, published under the general title Industrial
141 systems, installations and equipment and industrial products — Structuring principles and
142 reference designations, can be found on the IEC website.
143 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
144 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
145 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
146 described in greater detail at www.iec.ch/standardsdev/publications.
147 The committee has decided that the contents of this document will remain unchanged until the
148 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
149 specific document. At this date, the document will be
150 • reconfirmed,
151 • withdrawn,
152 • replaced by a revised edition, or
153 • amended.
– 6 – IEC CDV 81346-14 © IEC 2025
156 INTRODUCTION
157 This document considers and supports planning, design, utilization and maintenance of
158 manufacturing systems. The application of a reference designation system for manufacturing
159 systems (RDS-MS) can lead to new views and structuring of these activities and thereby offers
160 chances and potentials of increasing efficiency and economization.
161 This document is aligned with the structuring rules provided in IEC 81346-1, the classification
162 principles of IEC 81346-2. It also follows the principles for the classification of prime systems
163 and technical systems provided in ISO 81346-10 and ISO 81346-12.
164 The focus of this part of the 81346 international standard series is to define classes of systems
165 which are used in manufacturing, and to provide general guidelines for structuring of these
166 systems.
167 The following advantages of designation systems in accordance with this document and the
168 81346 international standard series are:
169 • The reference designation system can be applied to several technical fields. Mechanical,
170 electrical and process equipment can be treated the same way – a basis for companywide
171 synergy effects;
172 • The reference designation system allows integrating any kind of systems and components
173 without changing the once defined designations;
174 • The application of different aspects allows, for instance, the designation of functions
175 independently from realizing products and their location. The different representation of
176 systems through multiple aspects and the relations between these, allows for a more
177 inclusive and complete reference model of systems.
178 The users of this standard will be able to manage objects, relation among these and related
179 properties in a more efficient and consistent way. When implemented, information across
180 various data processing systems can be handled in an unambiguous way.
181 Manufacturing is considered as a major part in the Five-sector model of the economic sector.
182 The influence and importance of manufacturing ripple throughout the entire model as
183 described in the following:
184 1. primary sector (natural sector):
185 This sector involves the extraction and production of raw materials, for example, farming,
186 mining, fishing, forestry. The secondary sector relies heavily on this sector for the raw
187 materials it needs to produce products.
188 EXAMPLES: A steel manufacturer needs iron from the mining industry. A tyre manufacturer needs rubber from
189 the agricultural industry. A car manufacturer needs steel and tyres, thus, implicitely needing iron from the mining
190 industry and rubber from the agricultural industry
191 • secondary sector (industrial sector):
192 This sector takes the raw materials from the primary sector and transforms them into
193 finished products. This includes factories producing for eamples, cars, clothing, electronics,
194 steel, diaries, breweries. Building and construction is also part of this sector .
195 • tertiary sector (service sector):
196 This sector provides services to both individuals and businesses. While manufacturing is
197 not directly part of this sector, it relies heavily on it.
198 EXAMPLES: Transportation services to move products. Financial services to handle transactions. Marketing
199 services to sell products.
200 • quaternary sector (information sector):
201 This sector deals with information processing and knowledge sharing. It includes IT,
202 research and development, and consulting. Manufacturing increasingly relies on this sector
203 for technological advancements, process optimization, and data analysis.

IEC CDV 81346-14 © IEC 2025 – 77 –
204 • quinary sector (human services sector):
205 This sector involves services that focus on human development and well-being, such as
206 education, healthcare, and social work. While not directly involved in production, this sector
207 contributes to a skilled and healthy workforce, which is essential for a thriving manufacturing
208 industry.
210 The different sectors of the Five-sector model of the economic sector can be subdivided into
211 subsectors or industries. For the primary sector (natural sector), the following subsectors
212 are common:
213 • biotic sector;
214 • geological sector.
216 For the secondary sector (industrial sector), the following subsectors are common:
217 • construction, partly covered by ISO 81346-12.
218 • manufacturing sector;
219 • chemicals;
220 • electrical and optical;
221 • heavy industry;
222 • light industry;
223 • materials;
224 • utilies, partly covered by ISO 81346-10;
225 This part of the 81346 international standard is intended to cover manufacturing systems from
226 the geological aspect of the primary sector, such as minerals, fossil fuels, and land. It is also
227 intended to cover manufacturing and construction subsectors from the secondary sector.
228 The specifications in this document apply for processing, transportation and storage of final
229 products, as well as for auxiliary systems to support the manufacturing process such as
230 electrical systems, management systems and waste disposal systems.
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233 Industrial systems, installations and equipment and industrial products —
234 Structuring principles and reference designations
236 Part 14: Manufacturing and processing systems
238 1 Scope
239 This part of 81346 International Standard, published jointly by IEC and ISO, provides, in
240 combination with IEC 81346-1 and IEC 81346-2, rules and recommendations on the structuring
241 of systems and the information on systems of manufacturing systems. It also provides additional
242 classification schemes to those of IEC 81346-2 for use in reference designations within
243 manufacturing systems.
244 The structuring principles and the classes of objects are intended to provide a clear
245 identification and localization of the objects, and for use in their labelling in the manufacturing
246 plant, for their designation in technical documents and for the designation of the technical
247 documents as well.
248 The requirements in this document apply for processing, transportation and storage of products,
249 as well as for systems to support the manufacturing process such as electrical systems,
250 management systems and waste disposal systems.
251 This document is applicable for different areas within the manufacturing industry like light
252 industry, electrical and optical industry, chemical industry, material industry and heavy industry .
253 This document is not applicable for designations related to product individuals (e.g. inventory
254 number, serial number) nor to the products manufactured.
255 This document is also a horizontal publication intended for use by technical committees in
256 preparation of publications related to reference designations in accordance with the principles
257 laid down in IEC Guide 108.
258 2 Normative references
259 The following referenced documents are indispensable for the application of this document. For
260 dated references, only the edition cited applies. For undated references, the latest edition of
261 the referenced document (including any amendments) applies.
262 IEC 81346-1:2022, Industrial systems, installations and equipment and industrial products –
263 Structuring principles and reference designations – Part 1: Basic rules
264 IEC 81346-2:2019, Industrial systems, installations and equipment and industrial products –
265 Structuring principles and reference designations – Part 2: Classification of object and codes
266 for classes
267 3 Terms and definitions
268 For the purposes of this document, the terms and definitions given in IEC 81346-1:2022 and
269 the following apply.
270 3.1
271 information
272 intelligence or knowledge capable of being represented in forms suitable for communication,
273 storage or processing
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274 Note 1 to entry: Information may be represented for example by signs, symbols, pictures or sounds.
276 [SOURCE: IEC 60050-701:1988, 701-01-01]
277 3.2
278 data
279 representation of information (3.1) in a formalized manner suitable for human or automatic
280 processing
281 Note 1 to entry: Processing includes communication and interpretation.
282 Note 2 to entry: In English, the word "data" is generally used in plural form. For use in singular form, it can be called
283 "data item".
284 [SOURCE: IEC 60050-171:2019, 171-01-02]
285 3.3
286 plant
287 assembly of different systems on a specific site
288 [SOURCE: ISO 81346-10:2022, 3.10]
289 3.4
290 manufacturing
291 production or processing in defined quantities
292 3.5
293 production
294 making a single product by a particular series of actions
295 3.6
296 processing
297 treating matter by a particular series of actions
298 3.7
299 equipment
300 single apparatus or set of devices or apparatuses, or the set of main devices of an installation,
301 or all devices necessary to perform a specific task
302 Note 1 to entry: Examples of equipment are a power transformer, the equipment of a substation, measuring
303 equipment.
304 [SOURCE: IEC 60050-151:2001, 151-11-25]
305 3.8
306 gaseous matter
307 compressible medium which takes shape from its surrounding container
308 3.9
309 liquid matter
310 incompressible medium which takes shape from its surrounding container
311 3.10
312 solid matter
313 incompressible medium which does not take shape from its surrounding container

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314 4 General concepts
315 4.1 Object
316 IEC 81346-1:2022, 4.1 applies.
317 4.2 Aspect
318 IEC 81346-1:2022, 4.2 applies.
319 4.3 Systems
320 IEC 81346-1:2022, 4.3 applies.
321 Add the following sub-clauses:
322 4.3.101 Prime systems
323 A prime system provides an overall manufacturing step in the manufacturing process or
324 provides a support for such steps.
325 A prime system shall be classified according to the classification scheme in Annex AA,
326 Table AA.1.
327 A prime system may incorporate another prime system as one of its constituent system
328 elements.
329 4.3.102 Technical systems
330 A technical system provides a technical solution for a specific step in the manufacturing process
331 or provides the necessary support for such a technical solution.
332 A technical system shall be classified in accordance with the scheme defined in the Annex AA,
333 Table AA.2
334 A technical system may incorporate another technical system recursively as one of its elements.
335 A technical system shall not incorporate a prime system.
336 4.3.103 Component systems
337 Component systems are systems that are well defined with respect to both their inherent
338 function and implementation.
339 Component system shall be classified according with IEC 81346-2:2019, Table 3.
340 A component system may incorporate another component system recursively as one of its
341 elements. A component system shall not incorporate a prime system nor a technical system.
342 NOTE A component system are usually considered as of the shelf products.
343 4.4 Structuring
344 IEC 81346-1:2022, 4.4 applies.
345 4.5 Function
346 IEC 81346-1:2022, 4.5 applies.

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347 4.6 Products and components
348 IEC 81346-1:2022, 4.6 applies with the following additional note:
349 NOTE 4 In the context of this document, it is important to note the difference between a product and the product
350 aspect. A product is the result of the process (work) and is the "thing" that is delivered. The product aspect is a way
351 to view a system in order to "see" the objects in that system.
352 4.7 Location
353 IEC 81346-1:2022, 4.7 applies with the following addition:
354 Two different aspects shall be applied:
355 • Host installation aspect: this location aspect shall be applied to relate the location of an
356 object to locations inside or on a product or product assembly.
357 EXAMPLE 1: Objects viewed in host of installation are for example locations within or on a cubicle, a console
358 or a panel.
359 • Site of installation aspect: this location aspect shall be applied to relate the location of an
360 object to a location defined inside a larger location irrespective of the existence of physical
361 objects making up that larger location.
362 EXAMPLE 2: Objects viewed in the site of installation aspect are a site, a construction entity (a building), a part
363 of a building, a storey.
364 4.8 Types
365 IEC 81346-1:2022, 4.8 applies.
366 4.9 Object occurrences and product individuals
367 IEC 81346-1:2022, 4.9 applies.
368 4.10 Relations between concepts
369 IEC 81346-1:2022, 4.10 applies.
370 5 Structuring principles
371 5.1 General
372 IEC 81346-1:2022, 5.1 applies.
373 5.2 Forming structures
374 IEC 81346-1:2022, 5.2 applies.
375 5.3 Function-oriented structure
376 IEC 81346-1:2022, 5.3 applies.
377 5.4 Product-oriented structure
378 IEC 81346-1:2022, 5.4 applies.
379 5.5 Location-oriented structure
380 IEC 81346-1:2022, 5.5 applies.

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