EN 60715:2017

Dimensions of low-voltage switchgear and controlgear - Standardized mounting on rails for mechanical support of switchgear, controlgear and accessories

IEC 60715:2017 specifies dimensional and functional requirements for the compatible mounting of switchgear, controlgear and accessories on some types of rails. This second edition cancels and replaces the first edition published in 1981 and Amendment 1:1995. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the electrical function of the rail for protective earthing is covered by the relevant product standard. b) the document has been editorially updated to bring it into compliance with the ISO/IEC Directives, Part 2:2016, and drawings have been updated to bring them in compliance with ISO tolerancing and drawing standards.It has the status of a horizontal standard in accordance with IEC Guide 108.

Abmessungen von Niederspannungsschaltgeräten - Genormte Tragschienen für die mechanische Befestigung von elektrischen Geräten in Schaltanlagen

Dimensions de l'appareillage à basse tension - Montage normalisé sur profilés-supports pour le support mécanique des appareillages et de leurs accessoires

IEC 60715:2017 spécifie les exigences dimensionnelles et fonctionnelles destinées à assurer la compatibilité du montage des appareillages et de leurs accessoires sur certains types de profilés-supports. Cette deuxième édition annule et remplace la première édition parue en 1981 et l'Amendement 1:1995. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) la fonction électrique de conducteur de protection du profilé-support est couverte par la norme de produit correspondante. b) Le document a fait l’objet d’une mise à jour éditoriale visant à le rendre conforme aux Directives ISO/IEC, Partie 2:2016 et les dessins ont fait l’objet d’une mise à jour afin d’être conformes aux normes ISO de tolérancement et de dessin.Elle a le statut d'une norme horizontale conformément au Guide 108 de l'IEC.

Dimenzije nizkonapetostnih stikalnih in krmilnih naprav - Standardizirana vgradnja stikalnih naprav, krmilnih naprav in dodatne opreme na nosilne natične letve za mehansko podporo (IEC 60715:2017)

Ta dokument določa dimenzijske in funkcionalne zahteve za združljivo vgradnjo stikalnih naprav, krmilnih naprav in dodatne opreme na nekatere vrste nosilnih natičnih letev.
Namen tega dokumenta je določiti dimenzije, ki so ključnega pomena za pravilno načrtovanje nosilnih natičnih letev in opreme.
Ta dokument vsebuje poglavja z naslednjimi prerezi:
– poglavje s prerezom »pokrivne letve«;
– poglavje s prerezom »C«;
– poglavje s prerezom »G«.
OPOMBA 1: Združljivost pri vgradnji ne pomeni funkcijske zamenljivosti.
V dodatkih so opisane posebne jeklene nosilne natične letve, ki ustrezajo zahtevam v tem dokumentu, in dodatni podatki o dimenzijah in obremenitvah, ki veljajo za take letve.
OPOMBA 2: Podrobna zasnova in material določenih jeklenih letev sta podana v dodatkih.
OPOMBA 3: Uporabijo se lahko druge oblike letev, ki so v skladu s tem dokumentom, toda niso naštete v dodatku A.
Nosilne natične letve, ki se uporabljajo kot zaščitni vodnik, ki uporabljajo prevodni priključek za priključitev na priključni blok zaščitnega vodnika, so podane v standardu IEC 60947-7-2. Za druge aplikacije, pri katerih je nosilna natična letev uporabljena kot ozemljitveni vodnik, se uporablja ustrezni standard za izdelek.
Ta dokument ima status usklajenega horizontalnega standarda v skladu z vodilom IEC 108:2006. Ta horizontalni standard je namenjen predvsem tehničnim odborom za pripravo standardov v skladu z načeli vodila IEC 108. Ena od pristojnosti tehničnih odborov je, da med pripravo publikacij uporabljajo horizontalne standarde, kadar je to primerno. Vsebina tega horizontalnega standarda se ne uporablja, razen če je izrecno navedena ali zajeta v ustreznih publikacijah.

General Information

• Status: Published
• Publication Date: 23-Nov-2017
• Withdrawal Date: 31-Aug-2020
• ICS: 29.130.20 - Low voltage switchgear and controlgear
• Technical Committee: CLC/TC 121A - Low-voltage switchgear and controlgear
• Drafting Committee: IEC/SC 121A - Low-voltage switchgear and controlgear
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 24-Nov-2017
• Completion Date: 24-Nov-2017
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: SIST EN 60715:2018 - Dimensions of low-voltage switchgear and controlgear - Standardized mounting on rails for mechanical support of switchgear, controlgear and accessories (IEC 60715:2017)

Relations

• Replaces: EN 60715:2001 - Dimensions of low-voltage switchgear and controlgear - Standardized mounting on rails for mechanical support of electrical devices in switchgear and controlgear installations
• Effective Date: 26-Jan-2023

Overview

EN 60715:2017 (identical to IEC 60715:2017) is the international/harmonized standard that specifies dimensions and functional requirements for standardized mounting on rails used for mechanical support of low‑voltage switchgear, controlgear and accessories. This second edition replaces earlier versions (1981 and 1995 amendment) and is a horizontal standard (IEC Guide 108). Key updates include editorial alignment with ISO/IEC Directives and updated drawings and tolerancing; the electrical protective‑earthing function of rails is now dealt with in the relevant product standards.

Key topics and requirements

• Scope: Dimensional and functional requirements for compatible mounting of equipment on common rail types used in electrical panels and switchgear assemblies.
• Standard rail types covered: Top‑hat (TH) rails and section rails including:
  • TH 15‑5,5; TH 35‑7,5; TH 35‑15; TH 75‑25
  • C‑section rails: C 20, C 30, C 40, C 50
  • G‑section rail: G 32
• Dimensional specifications: Nominal profiles, critical dimensions and tolerances for interchangeability and snap‑on mounting of devices.
• Functional requirements: Mechanical fit, mounting stability, and guidance for safe assembly of switchgear and accessories.
• Annex A (normative): Detailed dimensions and tolerances for specific steel mounting rails.
• Annex B (informative): Practical application guidance - assessment of rail deflection, permissible load capacities, assembly options (e.g., paired C‑section rails) and torque/load tables.
• Compliance context: Recognized as a means to meet mechanical safety objectives of the EU Low Voltage Directive (2014/35/EU) where cited; reference to related standards (e.g., IEC 60947‑7‑2 for protective conductor terminal blocks).

Applications and users

EN 60715 is essential for:

• Panel builders and switchboard manufacturers specifying rail types and layouts for low‑voltage equipment.
• Controlgear and accessory manufacturers designing product housings, clips and mounting feet to ensure compatibility with DIN/DIN‑style rails.
• Electrical designers and specifiers creating layouts for industrial control panels, motor control centers, distribution boards and automation cabinets.
• Installers, maintenance engineers and certification bodies verifying correct mechanical mounting, load limits and regulatory conformity.

Practical benefits include guaranteed interchangeability, simplified panel assembly, predictable mechanical performance (deflection/load), and reduced design rework.

Related standards

• IEC 60947‑7‑2 (protective conductor terminal blocks)
• EU Directive 2014/35/EU (Low Voltage Directive) - EN 60715 can provide presumption of conformity for relevant mechanical safety objectives

Keywords: EN 60715:2017, IEC 60715:2017, DIN rail dimensions, top hat rail, C‑section rail, G‑section rail, mounting rails standard, low‑voltage switchgear, standardized mounting.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2018
1DGRPHãþD
SIST EN 60715:2002
'LPHQ]LMHQL]NRQDSHWRVWQLKVWLNDOQLKLQNUPLOQLKQDSUDY6WDQGDUGL]LUDQDYJUDGQMD
VWLNDOQLKQDSUDYNUPLOQLKQDSUDYLQGRGDWQHRSUHPHQDQRVLOQHQDWLþQHOHWYH]D
PHKDQVNRSRGSRUR,(&
Dimensions of low-voltage switchgear and controlgear - Standardized mounting on rails
for mechanical support of switchgear, controlgear and accessories (IEC 60715:2017)
Ta slovenski standard je istoveten z: EN 60715:2017
ICS:
29.130.20 Nizkonapetostne stikalne in Low voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60715
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2017
ICS 29.130.20 Supersedes EN 60715:2001
English Version
Dimensions of low-voltage switchgear and controlgear -
Standardized mounting on rails for mechanical support of
switchgear, controlgear and accessories
(IEC 60715:2017)
Dimensions de l'appareillage à basse tension - Montage Abmessungen von Niederspannungsschaltgeräten -
normalisé sur profilés-supports pour le support mécanique Genormte Tragschienen für die mechanische Befestigung
des appareillages et de leurs accessoires von elektrischen Geräten in Schaltanlagen
(IEC 60715:2017) (IEC 60715:2017)
This European Standard was approved by CENELEC on 2017-09-01. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60715:2017 E
European foreword
The text of document 121A/153/FDIS, future edition 2 of IEC 60715, prepared by SC 121A
"Low-voltage switchgear and controlgear" of IEC/TC 121 "Switchgear and controlgear and their
assemblies for low voltage" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 60715:2017.
The following dates are fixed:
(dop) 2018-06-01
• latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement
(dow) 2020-09-01
• latest date by which the national standards conflicting with
the document have to be withdrawn

This document supersedes EN 60715:2001.
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.
Endorsement notice
The text of the International Standard IEC 60715:2017 was approved by CENELEC as a European
Standard without any modification.
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 When 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.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60947-7-2 -  Low-voltage switchgear and controlgear - EN 60947-7-2 2009
Part 7-2: Ancillary equipment - Protective
conductor terminal blocks for copper
conductors
Annex ZZ
(informative)
Relationship between this European standard and the safety objectives of
Directive 2014/35/EU [2014 OJ L96] aimed to be covered
This European standard has been prepared under a Commission’s standardisation request relating to
harmonised standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means
of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the
Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the
making available on the market of electrical equipment designed for use within certain voltage limits
[2014 OJ L96].
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZZ.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding safety objectives of
that Directive, and associated EFTA regulations.
Table ZZ.1 – Correspondence between this European standard and Annex I of Directive
2014/35/EU [2014 OJ L96]
Safety objectives of Directive Clause(s) / sub-clause(s) of this Remarks/note
2014/35/EU EN
1 a) 2, 3, 5, Annex A
1 b) 5, Annex B
1 c) Refer to 2 a) to 2 d) and 3 a) to 3
c) of this table
2 a) - Not applicable
2 b) - Not applicable
2 c) 4, 5, Annex A, Annex B
2 d) - Not applicable
3 a) 4, 5, Annex A, Annex B
3 b) Annex B
3 c) Annex B
WARNING 1: Presumption of conformity stays valid only as long as a reference to this European
standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
IEC 60715 ®
Edition 2.0 2017-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
HORIZONTAL STANDARD
NORME HORIZONTALE
Dimensions of low-voltage switchgear and controlgear – Standardized mounting

on rails for mechanical support of switchgear, controlgear and accessories

Dimensions de l'appareillage à basse tension – Montage normalisé sur profilés-

supports pour le support mécanique des appareillages et de leurs accessoires

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.130.20 ISBN 978-2-8322-4646-7

– 2 – IEC 60715:2017 © IEC 2017
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Functional requirements . 8
5 Standard dimensions . 8
5.1 General . 8
5.2 Top hat section . 9
5.3 "C" section . 10
5.4 "G" section . 13
Annex A (normative)  Specific steel mounting rails . 14
A.1 General . 14
A.2 Top hat section rail TH 15-5,5 . 14
A.2.1 Dimensions . 14
A.2.2 Tolerances . 15
A.3 Top hat section rail TH 35-7,5 and TH 35-15 . 15
A.3.1 Dimensions . 15
A.3.2 Tolerances . 16
A.4 Top hat section rail TH 75-25 . 16
A.4.1 Dimensions . 16
A.4.2 Tolerances . 17
A.5 "C" section rails: C 20, C 30, C 40 and C 50 . 17
A.5.1 Dimensions . 17
A.5.2 Tolerance . 18
A.6 "G" section rail: G 32 . 18
A.6.1 Dimensions . 18
A.6.2 Tolerances . 19
Annex B (informative) Application guide . 20
B.1 General . 20
B.2 Guidance for use of top hat rails . 20
B.2.1 For steel rails in Annex A . 20
B.2.2 For rails other than steel rails . 23
B.3 Guidance for use of "C" section rails . 23
B.3.1 General . 23
B.3.2 For steel rails to Annex A . 23
B.3.3 For rails other than steel rails . 27
Bibliography . 28

Figure 1 – Mounting rail TH 15 . 9
Figure 2 – Mounting rail TH 35 . 9
Figure 3 – Mounting rail TH 75 . 10
Figure 4 – Mounting rail C 20 . 10
Figure 5 – Mounting rail C 30 . 11
Figure 6 – Mounting rail C 40 . 11

IEC 60715:2017 © IEC 2017 – 3 –
Figure 7 – Mounting rail C 50 . 12
Figure 8 – Mounting rail G 32 . 13
Figure A.1 – Top hat rails 15 mm wide for snap-on mounting of equipment . 15
Figure A.2 – Tolerances (TH 15-5,5) . 15
Figure A.3 – Top hat rails 35 mm wide for snap-on mounting of equipment . 16
Figure A.4 – Tolerances (TH 35-7,5 and TH 35-15) . 16
Figure A.5 – Top hat rail 75 mm wide for snap-on mounting of equipment . 17
Figure A.6 – Tolerances (TH 75-25) . 17
Figure A.7 – "C" section rails . 18
Figure A.8 – Tolerances (C 20, C 30, C 40 and C 50) . 18
Figure A.9 – Dimensions of "G" section rails . 19
Figure A.10 – Tolerances (G 32) . 19
Figure B.1 – Assessment of rail deflection . 21
Figure B.2 – Permissible load capacity . 22
M = f(L,h)
E
Figure B.3 – Permissible load capacity M = f(L,h) . 23
E
Figure B.4 – Assessment of rail deflection . 24
Figure B.5 – Permissible load capacity M = f(L) . 25
E
Figure B.6 – Assembly of two identical "C" section rails Assessment of the deflection . 26
Figure B.7 – Assembly of two identical "C" section rails Permissible stress M = f(L)
E
for H = 100 mm . 27

Table A.1 – Dimensions of “C” section rails . 18
Table B.1 – Maximum torque M . 24
max
– 4 – IEC 60715:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DIMENSIONS OF LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
STANDARDIZED MOUNTING ON RAILS FOR MECHANICAL SUPPORT
OF SWITCHGEAR, CONTROLGEAR AND ACCESSORIES

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60715 has been prepared by subcommittee 121A: Low-voltage
switchgear and controlgear, of IEC technical committee 121: Switchgear and controlgear and
their assemblies for low voltage.
This second edition cancels and replaces the first edition published in 1981 and
Amendment 1:1995. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the electrical function of the rail for protective earthing is covered by the relevant product
standard.
b) The document has been editorially updated to bring it into compliance with the ISO/IEC
Directives, Part 2:2016, and drawings have been updated to bring them in compliance with
ISO tolerancing and drawing standards.

IEC 60715:2017 © IEC 2017 – 5 –
It has the status of a horizontal standard in accordance with IEC Guide 108.
The text of this International Standard is based on the following documents:
FDIS Report on voting
121A/153/FDIS 121A/163/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – IEC 60715:2017 © IEC 2017
INTRODUCTION
This document is provided as a horizontal standard. It is necessary to define standardized
mounting on rails for mechanical support of low-voltage switchgear and controlgear, electrical
accessories, and similar devices.
The user wants them to be easy to fix, remove and rearrange.
Two methods are used for fixing a device on a rail:
– either directly by clipping on the rail (this method is particularly suitable for "top hat" rails
or "G" rails);
– or by means of a variety of accessories such as sliding nuts and hooked or T-headed bolts
(this method is particularly suitable for "C" rails).
In the case of "G" rails, the first of these methods has been mainly used for mounting terminal
blocks which snap in and out of position and are clamped in rows by adjustable end stops.
The rail can take the form of a standard section as an integral part of the enclosure.
Rails are also available of composite sections that combine, for example, "top hat" and "C"
section sizes thus accepting devices with various arrangements for mounting.
One or more rails can be used as necessary for fixing devices.
Since rail mounting can affect the performance of equipment, it can be advisable for
equipment manufacturers to give guidance in their literature on the suitability for this form of
mounting.
IEC 60715:2017 © IEC 2017 – 7 –
DIMENSIONS OF LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
STANDARDIZED MOUNTING ON RAILS FOR MECHANICAL SUPPORT
OF SWITCHGEAR, CONTROLGEAR AND ACCESSORIES

1 Scope
This document specifies dimensional and functional requirements for the compatible mounting
of switchgear, controlgear and accessories on some types of rails.
...