SIST EN IEC 60730-2-15:2026
(Main)Automatic electrical controls - Part 2-15: Particular requirements for automatic electrical air flow, water flow and water level sensing controls
- Abstract
IEC 60730-2-15:2026 applies to automatic electrical air flow, water flow and water level sensing controls
- for use in, on, or in association with boilers with a maximum pressure rating of 2 000 kPA (20 bar) and equipment for general household and similar use including controls for heating, air-conditioning and similar applications;
NOTE 1 Throughout this document, the word "equipment" means "appliance and equipment" and "controls" means "automatic electrical air flow, water flow and water level sensing controls".
EXAMPLE 1 Water flow and water level sensing controls of the float or electrode-sensor type used in boiler applications and air flow, water flow and water level sensing controls for swimming pool pumps, water tank pumps, cooling towers, dishwashers, washing machines, air conditioning chillers and ventilation applications.
- for building automation within the scope of ISO 16484 series and IEC 63044 series (HBES/BACS);
EXAMPLE 2 Independently mounted air flow, water flow and water level sensing controls in smart grid systems and controls for building automation systems within the scope of ISO 16484-2.
- for equipment that is used by the public, such as equipment intended to be used in shops, offices, hospitals, farms and commercial and industrial applications;
EXAMPLE 3 Controls for commercial boilers, heating and air-conditioning equipment.
- that are smart enabled controls;
EXAMPLE 4 Smart grid control, remote interfaces/control of energy-consuming equipment including computer or smart phone.
- that are AC or DC powered controls with a rated voltage not exceeding 690 V AC or 600 V DC;
- used in, on, or in association with equipment that use electricity, gas, oil, solid fuel, solar thermal energy, etc., or a combination thereof;
- utilized as part of a control system or controls which are mechanically integral with multifunctional controls having non-electrical outputs;
- using NTC or PTC thermistors and to discrete thermistors, requirements for which are contained in Annex J;
- that are mechanically or electrically operated, responsive to or controlling air flow, water flow and water level;
- as well as manual controls when such are electrically and/or mechanically integral with automatic controls.
NOTE 2 Requirements for manually actuated mechanical switches not forming part of an automatic control are contained in IEC 61058-1-1.
This document applies to
- the inherent safety of automatic electrical air flow, water flow and water level sensing controls, and
- functional safety of automatic air flow, water flow and water level sensing electrical controls and safety related systems,
- controls where the performance (for example the effect of EMC phenomena) of the product can impair the overall safety and performance of the controlled system,
- the operating values, operating times, and operating sequences where such are associated with equipment safety.
This document specifies the requirements for construction, operation and testing of automatic electrical air flow, water flow and water level sensing controls used in, on, or in association with an equipment.
This document takes into account the response value of an automatic action of a control where such a response value is dependent upon the method of mounting the control. Where a response value is of significant purpose for the protection of the user, or surroundings, the value defined in the appropriate h
- Status
- Published
- Public Enquiry End Date
- 19-Sep-2024
- Publication Date
- 19-Aug-2026
- Technical Committee
- ISS EIT.NZG - Household apliances
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 14-Jul-2026
- Due Date
- 18-Sep-2026
- Completion Date
- 20-Aug-2026
SIST EN IEC 60730-2-15:2026 is a European Standard published by CENELEC for automatic electrical air flow, water flow and water level sensing controls. It specifies particular construction, operation and testing requirements for controls used in boilers, household and similar equipment, building automation and other listed applications, so manufacturers, test laboratories and specifiers can judge whether a control fits the intended use.
What does SIST EN IEC 60730-2-15:2026 specify?
SIST EN IEC 60730-2-15:2026 applies to automatic electrical air flow, water flow and water level sensing controls and uses Part 1 as its base, with additions and changes for these products. It covers controls for boilers, household and similar equipment, building automation, public-use equipment, smart enabled controls, and AC or DC powered controls within the stated voltage limits.
The scope also makes two practical points clear. First, the terms “equipment” and “controls” are used in a defined way throughout the document. Second, controls intended exclusively for industrial process applications are outside the normal scope unless another relevant standard explicitly includes them, and pressure sensing controls are covered elsewhere.
The document is organized as follows.
| Annex | What it covers |
|---|---|
| Annex H | Requirements related to functional safety |
| Annex AA | Independently mounted controls for boiler applications |
| Annex BB | Requirements for response delay |
| Annex CC | Independently mounted air flow and water flow sensing controls |
Annex Q, Annex R, Annex S and Annex T give regional differences for CENELEC member countries, the United States of America, Japan and Canada.
What are the key requirements of SIST EN IEC 60730-2-15:2026?
SIST EN IEC 60730-2-15:2026 is mainly about declaring the control’s intended operating conditions, then proving that the control still works safely under those conditions, after endurance testing, and during EMC disturbance. The details are spread across Clauses 5, 9, 13 to 20, 25 and 26, with additional requirements in Annex H and the special annexes.
- Clause 5 and Table 1 require the manufacturer to declare the information needed for testing and use, including temperature limits, maximum working pressure, response time or response delay where relevant, special environmental conditions, mounting details, levelling indication and the output condition after operation. In practice, this declaration defines how the control will be tested and how it can be selected for the appliance.
- Clause 9 defines the action types and construction features that matter for safety. Manual reset boiler water level sensing controls must have a trip-free mechanism, response delay is required for type 1.AJ or 2.AJ action, and float-type controls that are affected by being out of level need a levelling indicator. That matters because the reset behavior and mounting position directly affect whether the control protects the equipment correctly.
- Clause 13 and Annex H cover electronic fault assessment and functional safety. The manufacturer must declare whether the control is for permanent or non-permanent operation, the fault reaction time, and the frequency of the defined-state test function. For integrated or incorporated controls, some EMC-related outputs are judged as part of the appliance or equipment, not as a standalone device.
- Clauses 14, 15, 16, 20 and 20.101 to 20.102 cover moisture, probe strength, heating and pressure strength. These clauses tie the test conditions to the declared maximum water temperature and working pressure, and they add immersion and hydrostatic strength checks where the control is exposed to water or boiler pressure. That matters for controls that sit directly in wet or pressurized service.
- Clause 19 and Annex AA / Annex CC set endurance testing for the different control types. The annexes specify cycle counts and cycling rates for independently mounted boiler controls and independently mounted air and water flow controls, so endurance testing matches the way the control is actually used.
- Annex BB controls response delay. If a response delay is declared, the annex sets the allowed deviation and drift by the method used to create that delay. In practice, this is the check that the delay stays predictable over time.
- Clause 25 and Clause 26 cover EMC immunity and abnormal operation tests. For some cut-outs, limiters and operating controls, the post-test condition is judged against the declared output condition; for air and water flow sensing controls, some abnormal operation tests are not applicable. That keeps the EMC assessment aligned with the role of the control in the final system.
What terms does SIST EN IEC 60730-2-15:2026 define?
SIST EN IEC 60730-2-15:2026 defines several control types so that users can match the right product to the right function.
- boiler water level cut-out - a float or electrode-sensor control for boiler applications that responds to low water level under abnormal conditions and has no user setting.
- boiler water level limiter - a float or electrode-sensor control for boiler applications that keeps the water level below or above a set point during normal operation and may have user adjustment.
- boiler water feed control - a float or electrode-sensor control that keeps boiler water above a set point and is used to cycle a feeder pump or feeder water valve.
- water level protective control - a control that prevents a hazardous situation during abnormal operation by acting at one or more water levels.
- water flow operating control - a control that senses or maintains water flow between two values during normal operation.
- air flow cut-out - a control that responds to lack of air flow during abnormal operation and has no user setting.
- response delay - a delay added to prevent unnecessary cycling when water level fluctuates.
The document also distinguishes permanent operation and non-permanent operation for functional safety assessment. Permanent operation means continuous monitoring for more than 24 h, while non-permanent operation means monitoring for less than 24 h.
Who uses SIST EN IEC 60730-2-15:2026?
SIST EN IEC 60730-2-15:2026 is used by manufacturers of automatic controls, appliance makers, boiler and HVAC equipment designers, and test laboratories. It is also relevant to certification bodies, quality managers and buyers who specify controls for pumps, chillers, dishwashers, washing machines, swimming pool equipment, ventilation and building automation systems.
What changed in SIST EN IEC 60730-2-15:2026 from the previous edition?
SIST EN IEC 60730-2-15:2026 supersedes EN IEC 60730-2-15:2019 and any related amendments or corrigenda. The underlying IEC document is a technical revision that aligns this part with IEC 60730-1:2022, and the European adoption was approved without modification.
Which standards are used with SIST EN IEC 60730-2-15:2026?
| Standard | What it contributes |
|---|---|
| EN IEC 60730-1 | General requirements for automatic electrical controls; Part 2-15 modifies this base part |
| IEC 60730-1:2022 | Basis used for this edition of Part 2-15 |
| IEC 60529 | Ingress protection classification, including IPX8 for submersible controls |
| IEC 61058-1-1 | Manually actuated mechanical switches not forming part of an automatic control |
| IEC 60730-2-6 | Pressure sensing controls covered outside this part |
| ISO 16484 series and IEC 63044 series | Building automation scope referenced for HBES/BACS applications |
Annex ZA of Part 1 is applicable for the European publication references.
What does the SIST EN IEC 60730-2-15:2026 document contain?
SIST EN IEC 60730-2-15:2026 contains the Part 1 base requirements as modified for air flow, water flow and water level sensing controls, plus a required technical information table and several special test methods. It includes procedures for mounting, endurance, immersion, probe dielectric strength, boiler pressure, hydrostatic strength, EMC immunity and abnormal operation.
The document also includes Table H.1 for functional-safety information, Table AA.1 and Table CC.1 for endurance cycles, and Table BB.1 for response delay limits. Part 1 figures apply, and the flexing test in Clause 20.8.101 refers to Figure 10.
Relations
- Effective Date
- 07-Jul-2026
- Effective Date
- 07-Jul-2026
- Effective Date
- 07-Jul-2026
- Effective Date
- 07-Jul-2026
- Effective Date
- 07-Jul-2026
- Effective Date
- 07-Jul-2026
- Effective Date
- 01-Sep-2026
Frequently Asked Questions
SIST EN IEC 60730-2-15:2026 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Automatic electrical controls - Part 2-15: Particular requirements for automatic electrical air flow, water flow and water level sensing controls". This standard covers: IEC 60730-2-15:2026 applies to automatic electrical air flow, water flow and water level sensing controls - for use in, on, or in association with boilers with a maximum pressure rating of 2 000 kPA (20 bar) and equipment for general household and similar use including controls for heating, air-conditioning and similar applications; NOTE 1 Throughout this document, the word "equipment" means "appliance and equipment" and "controls" means "automatic electrical air flow, water flow and water level sensing controls". EXAMPLE 1 Water flow and water level sensing controls of the float or electrode-sensor type used in boiler applications and air flow, water flow and water level sensing controls for swimming pool pumps, water tank pumps, cooling towers, dishwashers, washing machines, air conditioning chillers and ventilation applications. - for building automation within the scope of ISO 16484 series and IEC 63044 series (HBES/BACS); EXAMPLE 2 Independently mounted air flow, water flow and water level sensing controls in smart grid systems and controls for building automation systems within the scope of ISO 16484-2. - for equipment that is used by the public, such as equipment intended to be used in shops, offices, hospitals, farms and commercial and industrial applications; EXAMPLE 3 Controls for commercial boilers, heating and air-conditioning equipment. - that are smart enabled controls; EXAMPLE 4 Smart grid control, remote interfaces/control of energy-consuming equipment including computer or smart phone. - that are AC or DC powered controls with a rated voltage not exceeding 690 V AC or 600 V DC; - used in, on, or in association with equipment that use electricity, gas, oil, solid fuel, solar thermal energy, etc., or a combination thereof; - utilized as part of a control system or controls which are mechanically integral with multifunctional controls having non-electrical outputs; - using NTC or PTC thermistors and to discrete thermistors, requirements for which are contained in Annex J; - that are mechanically or electrically operated, responsive to or controlling air flow, water flow and water level; - as well as manual controls when such are electrically and/or mechanically integral with automatic controls. NOTE 2 Requirements for manually actuated mechanical switches not forming part of an automatic control are contained in IEC 61058-1-1. This document applies to - the inherent safety of automatic electrical air flow, water flow and water level sensing controls, and - functional safety of automatic air flow, water flow and water level sensing electrical controls and safety related systems, - controls where the performance (for example the effect of EMC phenomena) of the product can impair the overall safety and performance of the controlled system, - the operating values, operating times, and operating sequences where such are associated with equipment safety. This document specifies the requirements for construction, operation and testing of automatic electrical air flow, water flow and water level sensing controls used in, on, or in association with an equipment. This document takes into account the response value of an automatic action of a control where such a response value is dependent upon the method of mounting the control. Where a response value is of significant purpose for the protection of the user, or surroundings, the value defined in the appropriate h
IEC 60730-2-15:2026 applies to automatic electrical air flow, water flow and water level sensing controls - for use in, on, or in association with boilers with a maximum pressure rating of 2 000 kPA (20 bar) and equipment for general household and similar use including controls for heating, air-conditioning and similar applications; NOTE 1 Throughout this document, the word "equipment" means "appliance and equipment" and "controls" means "automatic electrical air flow, water flow and water level sensing controls". EXAMPLE 1 Water flow and water level sensing controls of the float or electrode-sensor type used in boiler applications and air flow, water flow and water level sensing controls for swimming pool pumps, water tank pumps, cooling towers, dishwashers, washing machines, air conditioning chillers and ventilation applications. - for building automation within the scope of ISO 16484 series and IEC 63044 series (HBES/BACS); EXAMPLE 2 Independently mounted air flow, water flow and water level sensing controls in smart grid systems and controls for building automation systems within the scope of ISO 16484-2. - for equipment that is used by the public, such as equipment intended to be used in shops, offices, hospitals, farms and commercial and industrial applications; EXAMPLE 3 Controls for commercial boilers, heating and air-conditioning equipment. - that are smart enabled controls; EXAMPLE 4 Smart grid control, remote interfaces/control of energy-consuming equipment including computer or smart phone. - that are AC or DC powered controls with a rated voltage not exceeding 690 V AC or 600 V DC; - used in, on, or in association with equipment that use electricity, gas, oil, solid fuel, solar thermal energy, etc., or a combination thereof; - utilized as part of a control system or controls which are mechanically integral with multifunctional controls having non-electrical outputs; - using NTC or PTC thermistors and to discrete thermistors, requirements for which are contained in Annex J; - that are mechanically or electrically operated, responsive to or controlling air flow, water flow and water level; - as well as manual controls when such are electrically and/or mechanically integral with automatic controls. NOTE 2 Requirements for manually actuated mechanical switches not forming part of an automatic control are contained in IEC 61058-1-1. This document applies to - the inherent safety of automatic electrical air flow, water flow and water level sensing controls, and - functional safety of automatic air flow, water flow and water level sensing electrical controls and safety related systems, - controls where the performance (for example the effect of EMC phenomena) of the product can impair the overall safety and performance of the controlled system, - the operating values, operating times, and operating sequences where such are associated with equipment safety. This document specifies the requirements for construction, operation and testing of automatic electrical air flow, water flow and water level sensing controls used in, on, or in association with an equipment. This document takes into account the response value of an automatic action of a control where such a response value is dependent upon the method of mounting the control. Where a response value is of significant purpose for the protection of the user, or surroundings, the value defined in the appropriate h
SIST EN IEC 60730-2-15:2026 is classified under the following ICS (International Classification for Standards) categories: 97.120 - Automatic controls for household use. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN IEC 60730-2-15:2026 has the following relationships with other standards: It is inter standard links to SIST EN 12977-5:2018, SIST EN 12098-5:2018, SIST EN 15500-1:2018, SIST EN 15500:2008, SIST EN 12977-5:2012, SIST EN 12098-2:2002, SIST EN IEC 60730-2-15:2019. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN IEC 60730-2-15:2026 is associated with the following European legislation: EU Directives/Regulations: 2014/30/EU, 2014/35/EU; Standardization Mandates: M/511, M/552. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN IEC 60730-2-15:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2026
Avtomatske električne krmilne naprave - 2-15. del: Posebne zahteve za avtomatska
električna tipala, ki zaznavajo pretok zraka, pretok vode in vodni nivo
Automatic electrical controls - Part 2-15: Particular requirements for automatic electrical
air flow, water flow and water level sensing controls
Automatische elektrische Regel- und Steuergeräte - Teil 2-15: Besondere
Anforderungen an automatische elektrische luftstrom-, wasserstrom- und
wasserstandsabhängige Regel- und Steuergeräte
Dispositifs de commande électrique automatiques - Partie 2-15: Exigences particulières
pour les dispositifs de commande électrique automatiques détecteurs de débit d'air, de
débit d'eau et de niveau d'eau
Ta slovenski standard je istoveten z: EN IEC 60730-2-15:2026
ICS:
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 60730-2-15
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2026
ICS 97.120 Supersedes EN IEC 60730-2-15:2019
English Version
Automatic electrical controls - Part 2-15: Particular requirements
for automatic electrical air flow, water flow and water level
sensing controls
(IEC 60730-2-15:2026)
Dispositifs de commande électrique automatiques - Partie Automatische elektrische Regel- und Steuergeräte - Teil 2-
2-15: Exigences particulières pour les dispositifs de 15: Besondere Anforderungen an automatische elektrische
commande électrique automatiques détecteurs de débit luftstrom-, wasserstrom- und wasserstandsabhängige
d'air, de débit d'eau et de niveau d'eau Regel- und Steuergeräte
(IEC 60730-2-15:2026) (IEC 60730-2-15:2026)
This European Standard was approved by CENELEC on 2026-05-15. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60730-2-15:2026 E
European foreword
The text of document 72/1524/FDIS, future edition 4 of IEC 60730-2-15, prepared by TC 72
"Automatic electrical controls" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 60730-2-15:2026.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2027-07-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-07-31
document have to be withdrawn
This document supersedes EN IEC 60730-2-15:2019 and all of its amendments and corrigenda (if
any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document is read in conjunction with EN IEC 60730-1.
This document has been prepared under a standardization request addressed to CENELEC by the
European Commission. The Standing Committee of the EFTA States subsequently approves these
requests for its Member States.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60730-2-15:2026 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60730-2-6 NOTE Approved as EN IEC 60730-2-6
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Annex ZA of Part 1 is applicable.
IEC 60730-2-15 ®
Edition 4.0 2026-04
INTERNATIONAL
STANDARD
Automatic electrical controls -
Part 2-15: Particular requirements for automatic electrical air flow, water flow
and water level sensing controls
ICS 97.120 ISBN 978-2-8327-1112-5
IEC 60730-2-15:2026-04(en)
IEC 60730-2-15:2026 © IEC 2026
CONTENTS
FOREWORD . 3
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 7
4 General . 9
5 Required technical information . 10
6 Protection against electric shock . 11
7 Provision for protective earthing . 11
8 Terminals and terminations. 12
9 Constructional requirements . 12
10 Threaded parts and connections . 13
11 Creepage distances, clearances and distances through solid insulation . 13
12 Components . 13
13 Fault assessment on electronic circuits . 13
14 Moisture and dust resistance . 14
15 Electric strength and insulation resistance . 15
16 Heating . 15
17 Manufacturing deviation and drift . 15
18 Environmental stress . 15
19 Endurance . 16
20 Mechanical strength . 17
21 Resistance to heat, fire and tracking . 19
22 Resistance to corrosion . 19
23 Electromagnetic compatibility (EMC) requirements – Emission . 19
24 Normal operation . 19
25 Electromagnetic compatibility (EMC) requirements – Immunity . 19
26 Abnormal operation tests . 20
Annex H (normative) Requirements related to functional safety . 21
Annex Q (informative) Regional differences relevant for the member countries of
CENELEC . 35
Annex R (informative) National differences relevant in the United States of America . 36
Annex S (informative) National differences relevant in Japan . 37
Annex T (informative) National differences relevant in Canada . 38
Annex AA (normative) Independently mounted controls for boiler applications . 39
Annex BB (normative) Requirements for response delay . 40
Annex CC (normative) Independently mounted air flow and water flow sensing controls . 41
Bibliography . 42
Table 1 – Required technical information and methods of providing these information . 10
Table H.1 – Additional items to Table 1 . 21
Table AA.1 – Number of cycles . 39
Table BB.1 – Deviation and drift limits . 40
IEC 60730-2-15:2026 © IEC 2026
Table CC.1 – Number of cycles. 41
IEC 60730-2-15:2026 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Automatic electrical controls -
Part 2-15: Particular requirements for automatic electrical air flow,
water flow and water level sensing controls
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
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
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consensus of opinion on the relevant subjects since each technical committee has representation from all
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60730-2-15 has been prepared by IEC technical committee 72: Automatic electrical
controls. It is an International Standard.
This fourth edition cancels and replaces the third edition published in 2017. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) adoption to IEC 60730-1:2022 with all of its significant changes to IEC 60730-1:2013,
IEC 60730-1:2013/AMD1:2015 and IEC 60730-1:2013/AMD2:2020.
IEC 60730-2-15:2026 © IEC 2026
The text of this International Standard is based on the following documents:
Draft Report on voting
72/1524/FDIS 72/1533/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
This part 2-15 is intended to be used in conjunction with IEC 60730-1. It was established on the
basis of the sixth edition of that standard (2022). Consideration may be given to future editions
of, or amendments to, IEC 60730-1.
This part 2-15 supplements or modifies the corresponding clauses in IEC 60730-1, so as to
convert that publication into the IEC standard: Particular requirements for automatic electrical
air flow, water flow and water level sensing controls.
Where this part 2-15 states "addition", "modification" or "replacement", the relevant require-
ment, test specification or explanatory matter in Part 1 should be adapted accordingly.
When a particular subclause of Part 1 is not mentioned in this Part 2, that subclause applies.
In the development of a fully international standard it has been necessary to take into
consideration the differing requirements resulting from practical experience in various parts of
the world and to recognize the variation in national electrical systems and wiring rules.
The reader's attention is drawn to the fact that Annex Q, Annex R, Annex S, and Annex T list
all of the "in-some-country" clauses on differing practices of a less permanent nature relating
to the subject of this document.
In this publication, the following print types are used:
– requirements proper: in roman type;
– test specifications: in italic type;
– explanatory matter: in smaller roman type.
– Defined terms: bold type.
Subclauses, notes or items which are additional to those in Part 1 are numbered starting from
101, additional annexes are lettered AA, BB, etc.
A list of all parts of the IEC 60730 series, under the general title: Automatic electrical controls,
can be found on the IEC website.
IEC 60730-2-15:2026 © IEC 2026
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
IEC 60730-2-15:2026 © IEC 2026
1 Scope
This clause of Part 1 is replaced by the following:
This part of IEC 60730 applies to automatic electrical air flow, water flow and water level sensing
controls
– for use in, on, or in association with boilers with a maximum pressure rating of 2 000 kPa
(20 bar) and equipment for general household and similar use including controls for heating,
air-conditioning and similar applications;
NOTE 1 Throughout this document, the word "equipment" means "appliance and equipment" and "controls" means
"automatic electrical air flow, water flow and water level sensing controls".
EXAMPLE 1 Water flow and water level sensing controls of the float or electrode-sensor type used in boiler
applications and air flow, water flow and water level sensing controls for swimming pool pumps, water tank pumps,
cooling towers, dishwashers, washing machines, air conditioning chillers and ventilation applications.
– for building automation within the scope of ISO 16484 series and IEC 63044 series
(HBES/BACS);
EXAMPLE 2 Independently mounted air flow, water flow and water level sensing controls in smart grid systems and
controls for building automation systems within the scope of ISO 16484-2.
– for equipment that is used by the public, such as equipment intended to be used in shops,
offices, hospitals, farms and commercial and industrial applications;
EXAMPLE 3 Controls for commercial boilers, heating and air-conditioning equipment.
– that are smart enabled controls;
EXAMPLE 4 Smart grid control, remote interfaces/control of energy-consuming equipment including computer or
smart phone.
– that are AC or DC powered controls with a rated voltage not exceeding 690 V AC or 600 V
DC;
– used in, on, or in association with equipment that use electricity, gas, oil, solid fuel, solar
thermal energy, etc., or a combination thereof;
– utilized as part of a control system or controls which are mechanically integral with
multifunctional controls having non-electrical outputs;
– using NTC or PTC thermistors and to discrete thermistors, requirements for which are
contained in Annex J;
– that are mechanically or electrically operated, responsive to or controlling air flow, water
flow and water level;
– as well as manual controls when such are electrically and/or mechanically integral with
automatic controls.
NOTE 2 Requirements for manually actuated mechanical switches not forming part of an automatic control are
contained in IEC 61058-1-1.
This document applies to
– the inherent safety of automatic electrical air flow, water flow and water level sensing
controls, and
– functional safety of automatic air flow, water flow and water level sensing electrical controls
and safety related systems,
– controls where the performance (for example the effect of EMC phenomena) of the product
can impair the overall safety and performance of the controlled system,
– the operating values, operating times, and operating sequences where such are associated
with equipment safety.
IEC 60730-2-15:2026 © IEC 2026
This document specifies the requirements for construction, operation and testing of automatic
electrical air flow, water flow and water level sensing controls used in, on, or in association with
an equipment.
This document takes into account the response value of an automatic action of a control where
such a response value is dependent upon the method of mounting the control. Where a
response value is of significant purpose for the protection of the user, or surroundings, the
value defined in the appropriate household equipment standard or as determined by the
manufacturer applies.
This document does not
– apply to air flow, water flow and water level sensing controls intended exclusively for
industrial process applications unless explicitly mentioned in the relevant part 2 or the
equipment standard. However, this document can be applied to evaluate air flow, water flow
and water level sensing controls intended specifically for industrial applications in cases
where no relevant safety standard exists;
– address the integrity of the output signal to the network devices, such as interoperability
with other devices unless it has been evaluated as part of the control system;
– apply to pressure sensing controls, the requirements for which are contained in
IEC 60730-2-6.
2 Normative references
This clause of Part 1 is applicable.
3 Terms and definitions
This clause of Part 1 is applicable except as follows:
3.2 Definitions of types of control according to purpose
Additional definitions:
3.2.101
boiler water level cut-out
water level sensing control of the float or electrode-sensor type for boiler applications intended
to respond to a low water level during abnormal operating conditions and which has no provision
for setting by the user
Note 101 to entry: A water level cut-out can be of the automatic or of the manual reset type. A boiler water level
cutout has a type 2 action, it is a type of water level protective control (see 3.2.105).
3.2.102
boiler water level limiter
water level sensing control of the float or electrode-sensor type for boiler applications which
is intended to keep a water level below or above one particular value during normal operating
conditions and which can have provision for setting by the user
Note 101 to entry: A boiler water level limiter has a type 2 action and is normally of the automatic reset type.
IEC 60730-2-15:2026 © IEC 2026
3.2.103
boiler water feed control
water level sensing control of the float or electrode-sensor type for boiler applications which
is intended to keep the water level in a boiler above one particular value during normal operating
conditions and which can have provision for setting by the user
Note 101 to entry: A boiler water feed control is of the automatic reset type and has a type 1 action. A boiler
water feed control is used on a boiler to cycle a feeder pump or feeder water valve. For the purposes of this
document, a type 2 boiler water feed control is considered to be a boiler water level limiter.
3.2.104
water level operating control
control which is intended to keep the water level below or above one particular value during
normal operating conditions and which can have provision for setting by the user
Note 101 to entry: A water level operating control is of the automatic reset type.
3.2.105
water level protective control
control which is intended to prevent a hazardous situation during abnormal operation of the
equipment either by
a) keeping the water level below or above one or more particular values, or by
b) energizing or de-energizing the associated equipment at one or more particular values of
water level
3.2.106
water flow operating control
flow sensing control intended to sense or maintain the water flow between two particular
values during normal operating conditions and which can have provision for setting by the
user
Note 101 to entry: A water flow operating control is of the automatic reset type.
3.2.107
air flow operating control
flow sensing control intended to sense or maintain the air flow between two particular values
during normal operating conditions and which can have provision for setting by the user
Note 101 to entry: An air flow operating control is of the automatic reset type.
3.2.108
water flow cut-out
flow sensing control intended to respond to a lack of water flow during abnormal operating
conditions and which has no provision for setting by the user
Note 101 to entry: A water flow cut-out is of the automatic or manual reset type.
3.2.109
air flow cut-out
flow sensing control intended to respond to a lack of air flow during abnormal operating
conditions and which has no provision for setting by the user
Note 101 to entry: An air flow cut-out is of the automatic or manual reset type.
IEC 60730-2-15:2026 © IEC 2026
3.3 Definitions relating to the function of controls
Additional definition:
3.3.101
response delay
delay provided to increase the response value of a water level operating control for the
purpose of preventing unnecessary cycling of the equipment due to fluctuating liquid level
Note 101 to entry: This is usually expressed in units of time.
3.22 Definitions relating to functional safety
Additional definitions:
3.22.101
permanent operation
continuous monitoring of the protective function during the operation of the appliance or system
for longer than 24 h
Note 101 to entry: 24 h is considered the typical time interval between a first and a second fault.
3.22.102
non-permanent operation
continuous monitoring of the protective function during the operation of the appliance or system
for less than 24 h
Note 101 to entry: 24 h is considered the typical time interval between a first and a second fault.
4 General
This clause of Part 1 is applicable except as follows:
4.3 General notes on tests
4.3.2 Conditions of test
4.3.2.7 Addition:
The rates of change of level or flow declared in Table 1, requirement 31 and used in Clause 19
(i.e. α , β , α , β ) shall have test tolerances as declared by the manufacturer.
1 1 2 2
4.3.4 Instructions for test
4.3.4.1 According to submission
Additional subclause:
4.3.4.1.101 The values in Annex AA, Table AA.1 apply for the testing of independently
mounted water level sensing controls used in boiler applications in Clause 19 unless a higher
number is declared. The values in Annex CC, Table CC.1 apply for the testing of independently
mounted air and water flow sensing controls in Clause 19 unless otherwise declared. Values
for integrated and incorporated controls are specified in the appropriate equipment standard.
IEC 60730-2-15:2026 © IEC 2026
4.3.4.5 According to purpose
4.3.4.5.1 Modification:
Replace the second sentence with the following text:
For multi-purpose controls other than combinations of boiler water level sensing controls using
a common sensing mechanism, during the tests for any one purpose, the activating quantities
and prime movers applicable to all other purposes shall be maintained constant at the most
arduous value or position within the declared range or ranges.
5 Required technical information
This clause of Part 1 is applicable except as follows:
5.2 Methods of providing technical information
Table 1 – Required technical information and methods of providing these information
Clause or
Information Method
subclause
Replacement:
16 Temperature limits of mounting surfaces (T ) 19.3 D
s
20 13.1.3.3, X
Number of automatic cycles (A) for each automatic action.
Table 14,
Preferred values are: 300 000 cycles; 200 000 cycles; 100 000 cycles;
19.7.6, 19.8.4
30 000 cycles; 20 000 cycles; 10 000 cycles; 6 000 cycles; 3 000
1) 1) 2) 2)4) 3)
cycles ; 1 000 cycles ; 300 cycles ; 30 cycles ; 1 cycle .
1)
Not applicable to thermostats or to other fast cycling actions.
2)
Applicable only to manual reset.
3)
Applicable only to actions which require the replacement of a part
after each operation.
4)
Can only be reset during manufacturer servicing.
NOTE For controls having more than one automatic action, a different
value can be declared for each.
29 Not applicable
38 Not applicable
Additional items:
101 Maximum fluid temperature (T ) in °C 16.5 a),
L
D
20.101.2
102 Response time, if applicable, for boiler water level sensing controls H.17 C
103 Maximum working pressure, if applicable 3.3.28,
C/D
20.101.1
104 Method of determining response time for boiler water level sensing H.17.6.101
X
controls
105 Test method for 20.101.3 for boiler water level sensing controls 20.101.1,
X
20.101.3
IEC 60730-2-15:2026 © IEC 2026
Clause or
Information Method
subclause
106 Any special environmental conditions in which the control is intended to 14.1.101,
14.1.102,
be used (other than declared in Table 1, requirement 9)
20.8.101,
H.25.4.101.2,
H.25.5.1.101.2,
H.25.5.2.101.2,
H.25.6.101.2, D
H.25.8.101.2,
H.25.9.101.2,
H.25.10.101.2,
H.25.11.101.2,
H.25.12.101.2,
H.25.13.101.2
107 Cord-connected float control which can be wholly or partially submerged 9.7.1.1, 9.7.1.2,
in water or any other special environmental conditions declared in 14.1.101, D
requirement 106 20.8.101
108 Response delay 3.3.101,
9.4.101,
D
Annex BB,
Table BB.1
109 9.6.3.1
Unique or common type reference of special mounting means, if any C
110 Levelling indication for mounting, if any 9.11.101 C
111 The output condition of air flow cut-outs, water flow cut-outs and 13.1.3.2,
boiler water level cut-outs and limiters after operation
H.25.4.101.2,
H.25.5.1.101.2,
H.25.5.2.2,
H.25.5.2.101.2,
H.25.6.101.2,
H.25.8.3,
H.25.8.101.2,
H.25.8.101.3,
H.25.9.1,
X
H.25.9.101.2,
H.25.9.101.3,
H.25.10.101.2,
H.25.11.2.2,
H.25.11.3.2,
H.25.11.101.2,
H.25.12.3,
H.25.12.101.2,
H.25.13.3,
H.25.13.101.2
Additional footnotes:
The minimum number of automatic cycles is 6 000 for water level sensing controls of the float type.
This information can be taken from the appropriate IEC equipment standard or can be as declared by the
manufacturer.
The unique or common type reference(s) shall be marked on both the mounting means and the control.
Method C is required for air flow, water flow and boiler water level sensing controls.
For example, conducting or non-conducting, as applicable.
6 Protection against electric shock
This clause of Part 1 is applicable.
7 Provision for protective earthing
This clause of Part 1 is applicable.
IEC 60730-2-15:2026 © IEC 2026
8 Terminals and terminations
This clause of Part 1 is applicable.
9 Constructional requirements
This clause of Part 1 is applicable except as follows:
9.4 Actions
9.4.11 Type 1.H or 2.H action (a trip-free mechanism in which the contacts cannot be
prevented from opening and which can automatically be reset to the "closed" position
after normal operation conditions have been restored if the reset means is held in the
"reset" position)
Modification:
Delete the last sentence of the first paragraph.
9.4.12 Type 1.J or 2.J action (a trip-free mechanism in which the contacts cannot be
prevented from opening and the control is not permitted to function as an automatic reset
device if the reset means is held in the "reset" or "on" position)
Modification:
Delete the last sentence of the first paragraph.
Additional subclauses:
9.4.101 Type 1.AJ or 2.AJ action
A type 1.AJ or 2.AJ action shall be designed such that a response delay, as declared, is
provided.
For type 2.AJ action, response delay is checked by the test of H.17.5.
9.4.102 Type 2.D, 2.H or 2.J action
Manual reset boiler water level sensing controls within the scope of this document shall have a
trip-free mechanism classified as type 2.D, 2.H or 2.J action.
9.7 Attachment of cords
9.7.1 Flexible cords
9.7.1.1 Addition:
For controls declared in Table 1, requirement 107, the appropriate test identified by 9.7.1.2
shall be conducted.
9.7.1.2 Replacement:
Compliance is checked by subjecting the control, fitted with the flexible cord or range of flexible
cords for which it is designed, to the test of 20.8 or for controls declared in Table 1, requirement
107, to the test of 20.8.101.
IEC 60730-2-15:2026 © IEC 2026
9.11 Requirements during mounting, use, maintenance and servicing
Additional subclause:
9.11.101 Levelling indicators
If the operation of a type 2 water level control of the float type is affected by its being placed
out of level, the control shall be provided with a levelling indicator (e.g. a bubble, pendulum,
horizontal or vertical line).
Compliance is checked by inspection and the test of H.17.5.
Additional subclauses:
9.101 Construction requirements relating to operating mechanism
9.101.1 Screws and nuts which attach parts to movable members shall be swaged or
otherwise locked.
NOTE 101 For example, this would apply to the float hinge pivot of a water level sensing control.
9.101.2 Operating parts shall be separated by barriers or by their physical location from
conductors to be connected to the control to avoid interference with the movement of such
parts by the conductors.
Compliance with 9.101.1 and 9.101.2 is checked by inspection.
10 Threaded parts and connections
This clause of Part 1 is applicable.
11 Creepage distances, clearances and distances through solid insulation
This clause of Part 1 is applicable.
12 Components
This clause of Part 1 is applicable.
13 Fault assessment on electronic circuits
This clause of Part 1 is applicable except as follows:
13.1.3.2 Test procedure
Modification:
Add the following after the first sentence:
In addition, controls declared under Table 1, requirement 111, shall be tested when the control
is in the declared condition and when it is not.
IEC 60730-2-15:2026 © IEC 2026
Add the following sentence to the end of item h):
A further option for integrated and incorporated controls is to require, for example, further
shielding, in the appliance or equipment.
13.1.3.8 Compliance criteria
Modification:
Replace item c) with the following:
c) Not applicable.
14 Moisture and dust resistance
This clause of Part 1 is applicable except as follows:
14.1 Protection against ingress of water and dust
14.1.1 Addition:
Controls declared in Table 1, requirement 107, to be wholly or partially submerged in water
during usage shall have enclosures classified as IPX8 which provide protection against
continuous immersion in water as specified in IEC 60529.
For controls declared in Table 1, requirement 107, and having enclosures classified as IPX8,
the requirements of 14.1.2 to 14.1.6, are not applicable.
Compliance is checked by the tests 14.1.101.
Additional subclauses:
14.1.101 Prior to subjecting three samples of the cord-connected float control to the following
immersion test, the control shall be subjected to the impact resistance test in 20.2.
The controls are to be immersed and maintained in the test medium or other special
environmental condition as declared in Table 1, requirements 106 and 107, at T for seven days
L
such that the test medium, or other environmental condition, is at least 1 m above the highest
point of the float control.
After the test, the control shall comply with the requirements of Clauses 6 and 15 and 14.3 for
basic insulation, and there shall be no evidence of ingress of the test medium when compliance
is checked by inspection.
14.1.102 Air flow, water flow and water level operating controls which are declared in
Table 1, requirement 106, for use in a special environmental condition shall be evaluated further
for use in this environment.
Compliance is checked by the appropriate tests for the declared environment described in the
relevant IEC standard or by a test method agreed between manufacturer and testing authority.
After the test, the control is deemed to comply if:
– there is no evidence of ingress of the test medium;
– all actions function automatically and manually in the intended and declared manner, and
– the requirements of 19.5 are still met.
IEC 60730-2-15:2026 © IEC 2026
15 Electric strength and insulation resistance
This clause of Part 1 is applicable except as follows:
Additional subclause:
15.101 Electric strength of probes
Probes of electrode-sensor type boiler water level sensing controls shall be subjected to the
following test:
NOTE 101 The purpose of this test is to evaluate degradation of probe insulating material as a result of exposure
to conditions in the boiler.
Three samples of the probe shall be conditioned for 10 days in a test boiler operating at the
manufacturer's declared maximum working pressure and water temperature. The samples are
then removed from the test boiler and any surface contamination is removed.
The conditioned samples and three unconditioned samples are then immediately subjected to
an increasing voltage until dielectric breakdown occurs.
The average breakdown voltage of the conditioned samples shall be not less than 50 % of the
breakdown voltage of the unconditioned samples and, furthermore, shall be not less than the
appropriate value in Table 16.
16 Heating
This clause of Part 1 is applicable except as follows:
16.4 Modification:
Replace item c)1) with the following:
1) Not applicable.
16.5 Modification:
Replace item a) with the following:
a) For water flow and water level sensing controls, the control is mounted in the declared
manner with the water maintained at T (Table 1, requirement 101) and, if applicable, at
L
maximum working pressure. The test is conducted with the switch head in an ambient
temperature maintained between T and either (T + 5) °C or 1,05 times T ,
max max max
whichever is greater. For water flow sensing controls, the test is conducted with and without
water flowing.
17 Manufacturing deviation and drift
This clause of Part 1 is applicable.
18 Environmental stress
This clause of Part 1 is applicable.
IEC 60730-2-15:2026 © IEC 2026
19 Endurance
This clause of Part 1 is applicable except as follows:
19.1 General requirements
19.1.2 All controls
Addition:
Air and water flow sensing controls shall operate as intended. When subjecting the controls
to the requirements of Clause 19, the flow sensing controls shall be actuated and cycled by
means simulating the actual applications. The simulated mechanical cycling means shall be
agreed to between the manufacturer and the test authority. The specified fluid and/or specific
flow rate are not required.
19.1.5 Compliance criteria
Replacement:
Compliance with 19.1.2 and 19.1.3 is checked by the tests of 19.15.
19.15 Test for particular purpose controls
Additional subclauses:
19.15.101 Boiler water level cut-out
– Subclauses 19.1 to 19.5 inclusive are applicable;
– Subclause 19.6 is applicable to actions classified as type 2.M, the value of "X" being as
small as practicable;
– Subclauses 19.7 and 19.8 are applicable except that, where necessary, the reset operation
is obtained by actuation. This actuation shall be as specified in 19.4 for accelerated speed,
as soon as permitted by the mechanism, or as declared by the manufacturer in Table 1;
– Subclauses 19.9, 19.11 and 19.12 are not applicable;
– Subclauses 19.10 and 19.13 do not apply to the normal reset manual action which is tested
during the automatic test of 19.7 and 19.8. If the water level cut-out has other manual actions
which are not tested during the automatic tests, then these subclauses are applicable;
– Subclause 19.14 is applicable.
19.15.102 Boiler water level limiter
– Subclauses 19.1 to 19.5 inclusive are applicable;
– Subclause 19.6 is applicable to actions classified as type 2.M, the value of "X" being as
small as practicable;
– Subclauses 19.7 and 19.8 are applicable except that, where necessary, the reset operation
is obtained by actuation. This actuation shall be as specified in 19.4 for accelerated speed,
as soon as permitted by the mechanism, or as declared by the manufacturer in Table 1;
– Subclauses 19.9 to 19.13 inclusive are not applicable;
– Subclause 19.14 is applicable.
IEC 60730-2-15:2026 © IEC 2026
19.15.103 Boiler water feed controls
– Subclauses 19.1 to 19.5 inclusive are applicable;
– Subclause 19.6 is applicable to actions classified as type 2.M, the value of "X" being as
small as practicable;
– Subclauses 19.7 and 19.8 are applicable except that, where necessary, the reset operation
is obtained by actuation. This actuation shall be as specified in 19.4 for accelerated speed,
as soon as permitted by the mechanism, or as declared by the manufacturer in Table 1;
– Subclause 19.9 is applicable;
– Subclause 19.10 to 19.13 are not applicable;
– Subclause 19.14 is applicable.
19.15.104 Water level operating controls
– Subclauses 19.1 to 19.5 inclusive are applicable;
– Subclause 19.6 is not applicable;
– Subclauses 19.7 and 19.8 are applicable;
– Subclauses 19.9 to 19.13 are not applicable;
– Subclause 19.14 is applicable.
19.15.105 Water level protective controls
– Subclauses 19.1 to 19.5 inclusive are applicable;
– Subclause 19.6 is not applicable;
– Subclauses 19.7 and 19.8 are applicable;
– Subclauses 19.9 to 19.13 are not applicable;
– 19.14 is applicable.
19.15.106 Air and water flow sensing cont
...