SIST EN IEC 60309-4:2022

SLOVENSKI STANDARD
01-december-2022
Nadomešča:
SIST EN 60309-4:2008
SIST EN 60309-4:2008/A1:2012
Vtiči, fiksne ali prenosne vtičnice in vtičnice za industrijsko rabo - 4. del: Vtičnice z
zaklepom ali brez njega (IEC 60309-4:2021)
Plugs, fixed or portable socket-outlets and appliance inlets for industrial purposes - Part
4: Switched socket-outlets with or without interlock (IEC 60309-4:2021)
Stecker, ortsfeste oder ortsveränderliche Steckdosen und Gerätestecker für industrielle
Anwendungen - Teil 4: Abschaltbare Steckdosen mit oder ohne Verriegelung
(IEC 60309-4:2021)
Fiches, socles fixes de prise de courant, prises mobiles et socles de connecteur pour
usages industriels - Partie 4: Socles de prise de courant avec interrupteur, avec ou sans
dispositif de verrouillage (IEC 60309-4:2021)
Ta slovenski standard je istoveten z: EN IEC 60309-4:2022
ICS:
29.120.30 Vtiči, vtičnice, spojke Plugs, socket-outlets,
couplers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60309-4
NORME EUROPÉENNE
EUROPÄISCHE NORM June 2022
ICS 29.120.30 Supersedes EN 60309-4:2007 + A1:2012
English Version
Plugs, fixed or portable socket-outlets and appliance inlets for
industrial purposes - Part 4: Switched socket-outlets with or
without interlock
(IEC 60309-4:2021)
Fiches, socles fixes de prise de courant, prises mobiles et Stecker, ortsfeste oder ortsveränderliche Steckdosen und
socles de connecteur pour usages industriels - Partie 4: Gerätestecker für industrielle Anwendungen - Teil 4:
Socles de prise de courant avec interrupteur, avec ou sans Abschaltbare Steckdosen mit oder ohne Verriegelung
dispositif de verrouillage (IEC 60309-4:2021)
(IEC 60309-4:2021)
This European Standard was approved by CENELEC on 2021-09-08. 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,
Turkey 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
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60309-4:2022 E

European foreword
The text of document 23H/482/FDIS, future edition 2 of IEC 60309-4, prepared by SC 23H "Plugs,
Socket-outlets and Couplers for industrial and similar applications, and for Electric Vehicles" of
IEC/TC 23 "Electrical accessories" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 60309-4:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022-12-17
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-06-17
document have to be withdrawn
This document supersedes EN 60309-4:2007 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 60309-1:2022 and with EN IEC 60309-2:2022.
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association.
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 60309-4:2021 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  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.cenelec.eu.
Clause 2 of EN IEC 60309-1:2022 applies except as follows:
Add the following references:
Publication Year Title EN/HD Year
IEC 60073 - Basic and safety principles for man-machine EN 60073 -
interface, marking and identification - Coding
principles for indicators and actuators
IEC 60309-1 2021 Plugs, fixed or portable socket-outlets and EN IEC 60309-1 2022
appliance inlets for industrial purposes - Part
1: General requirements
IEC 60309-2 2021 Plugs, fixed or portable socket-outlets and EN IEC 60309-2 2022
appliance inelts for industrial purposes - Part
2: Dimensional compatibility requirements for
pin and contact-tube accessories
IEC 60617 - Standard data element types with associated - -
classification scheme for electric components
- Part 4: IEC reference collection fo standard
data element types and component classes
IEC 60947-1 2020 Low-voltage switchgear and controlgear - EN IEC 60947-1 2021
Part 1: General rules
IEC 60947-3 - Low-voltage switchgear and controlgear - EN IEC 60947-3 -
Part 3: Switches, disconnectors, switch-
disconnectors and fuse-combination units
IEC 60947-4-1 - Low-voltage switchgear and controlgear - EN IEC 60947-4-1 -
Part 4-1: Contactors and motorstarters -
Electromechanical contactors and motor-
starters
IEC 60947-5-1 - Low-voltage switchgear and controlgear - EN 60947-5-1 -
Part 5-1: Control circuit devices and
switching elements - Electromechanical
control circuit devices
IEC 61058-1 - Switches for appliances - Part 1: General EN IEC 61058-1 -
requirements
IEC 60309-4 ®
Edition 2.0 2021-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Plugs, fixed or portable socket-outlets and appliance inlets for industrial

purposes –
Part 4: Switched socket-outlets with or without interlock

Fiches, socles fixes de prise de courant, prises mobiles et socles de connecteur

pour usages industriels –
Partie 4: Socles de prise de courant avec interrupteur, avec ou sans dispositif

de verrouillage
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.30 ISBN 978-2-8322-9847-3

– 2 – IEC 60309-4:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 General . 7
5 Standard ratings . 8
6 Classification of accessories . 8
7 Marking . 9
8 Dimensions. 10
9 Protection against electric shock . 11
10 Provision for earthing . 12
11 Terminals and terminations . 12
12 Interlocks, switches and their components . 12
13 Resistance to ageing of rubber and thermoplastic material . 17
14 Construction . 17
15 Construction of fixed socket-outlets . 17
16 Construction of plugs and portable socket-outlets . 17
17 Construction of appliance inlets . 17
18 Degrees of protection . 17
19 Insulation resistance and dielectric strength . 18
20 Breaking capacity . 18
21 Normal operation . 18
22 Temperature rise . 18
23 Flexible cables and their connection . 20
24 Mechanical strength . 20
25 Screws, current-carrying parts and connections . 21
26 Creepage distances, clearances and distances through sealing compound . 21
27 Resistance to heat, to fire and to tracking . 21
28 Corrosion and resistance to rusting . 22
29 Conditional short-circuit current withstand test . 22
30 Electromagnetic compatibility . 22

Figure 401 – Example of apparatus for checking the withdrawal force . 15
Figure 402 – Actuator applied force F . 21

Table 401 – Withdrawal force with respect to ratings . 14
Table 11 – Temperature rise test . 19
Table 402 – Actuator test force F . 20

IEC 60309-4:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PLUGS, FIXED OR PORTABLE SOCKET-OUTLETS AND
APPLIANCE INLETS FOR INDUSTRIAL PURPOSES –

Part 4: Switched socket-outlets
with or without interlock
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 60309-4 has been prepared by subcommittee 23H: Plugs,
socket-outlets and couplers for industrial and similar applications, and for electric vehicles, of
IEC technical committee 23: Electrical accessories.
This second edition cancels and replaces the first edition published in 2006 and
Amendment 1:2012. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– updated in order to take into account the technical revisions to IEC 60309-1 and to
IEC 60309-2.
– 4 – IEC 60309-4:2021 © IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
23H/482/FDIS 23H/488/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/standardsdev/publications.
This document is to be read in conjunction with IEC 60309-1:2021 and with
IEC 60309-2:2021.
In this document, the following print types are used:
– requirements proper: in roman type;
– test specifications: in italic type;
– notes: in smaller roman type.
IEC 60309-1:2021 deals with general requirements and comprises all clauses of a general
character.
Subsequent parts deal with the requirements of particular types of accessories. The clauses
of these particular requirements supplement or modify the corresponding clauses of
IEC 60309-1:2021 or of IEC 60309-2:2021.
Clauses, subclauses, figures, tables and notes which are additional to those of
IEC 60309-1:2021 or of IEC 60309-2:2021 are numbered starting from 401.
A list of all parts in the IEC 60309 series, published under the general title Plugs, fixed or
portable socket-outlets and appliance inlets for industrial purposes, can be found on the IEC
website.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next edition.
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,
• replaced by a revised edition, or
• amended.
IEC 60309-4:2021 © IEC 2021 – 5 –
PLUGS, FIXED OR PORTABLE SOCKET-OUTLETS AND
APPLIANCE INLETS FOR INDUSTRIAL PURPOSES –

Part 4: Switched socket-outlets
with or without interlock
1 Scope
Clause 1 of IEC 60309-1:2021 or of IEC 60309-2:2021 applies as follows:
Replace the first two paragraphs by the following:
This part of IEC 60309 applies to self-contained products primarily intended for industrial use,
either indoors or outdoors that combine the following items within a single enclosure:
– a fixed or portable socket-outlet according to IEC 60309-1 or IEC 60309-2 with a rated
operating voltage not exceeding 1 000 V DC or 1 000 V AC with a frequency not
exceeding 500 Hz and a rated current not exceeding 800 A;
– a switching device.
These products can incorporate an interlock and/or protective devices.
These accessories are intended to be installed by instructed persons or skilled persons only.
2 Normative references
Clause 2 of IEC 60309-1:2021 applies except as follows:
Additional normative references:
IEC 60073, Basic and safety principles for man-machine interface, marking and identification
– Coding principles for indicators and actuators
IEC 60309-1:2021, Plugs, fixed or portable socket-outlets and appliance inlets for industrial
purposes – Part 1: General requirements
IEC 60309-2:2021, Plugs, fixed or portable socket-outlets and appliance inlets for industrial
purposes – Part 2: Dimensional compatibility requirements for pin and contact-tube
accessories
IEC 60617, Graphical symbols for diagrams (available at http://std.iec.ch/iec60617)
IEC 60947-1:2020, Low-voltage switchgear and controlgear – Part 1: General rules
IEC 60947-3, Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors,
switch-disconnectors and fuse-combination units
IEC 60947-4-1, Low-voltage switchgear and controlgear – Part 4-1: Contactors and motor-
starters – Electromechanical contactors and motor-starters
IEC 60947-5-1, Low-voltage switchgear and controlgear – Part 5-1: Control circuit devices
and switching elements – Electromechanical control circuit devices

– 6 – IEC 60309-4:2021 © IEC 2021
IEC 61058-1, Switches for appliances – Part 1: General requirements
3 Terms and definitions
Clause 3 of IEC 60309-1:2021 or of IEC 60309-2:2021 applies except as follows:
Terms and definitions 3.6 to 3.9 do not apply.
Add the following terms and definitions:
3.401
switched socket-outlet
product (interlocked or non-interlocked) containing in a single enclosure a switching device
and a socket-outlet, intended to be used in combination
3.402
interlocked socket-outlet
socket-outlet associated with an interlock
3.403
switching device
device designated to make or break the current in one or more electric circuits
[SOURCE IEC 60050-441:1984, 441-14-01]
3.403.1
mechanical switching device
switching device designed to close and open one or more electric circuits by means of
separable contacts
[SOURCE: IEC 60050-441:1984, 441-14-02, modified – The note has been omitted.]
3.403.1.1
(mechanical) switch
mechanical switching device capable of making, carrying and breaking currents under normal
circuit conditions which may include specified operating overload conditions and also carrying
for a specified time currents under specified abnormal circuit conditions such as those of
short-circuit
Note 1 to entry: A switch may be capable of making, but not breaking short-circuit currents.
[SOURCE: IEC 60050-411:1984, 441-14-10]
3.403.1.2
switch-disconnector
switch which, in the open position, complies with the requirements specified for the isolating
function
[SOURCE: IEC 60050-411:1984, 441-14-12, modified – Reference made to the isolating
function instead of to the requirements specified for a disconnector.]

IEC 60309-4:2021 © IEC 2021 – 7 –
3.403.1.3
contactor
mechanical switching device having only one position of rest, operated otherwise than by
hand, capable of making, carrying and breaking currents under normal circuit conditions
including operating overload conditions
[SOURCE: IEC 60050-411:1984, 441-14-33, modified – "mechanical" has been omitted from
the term and the note has been deleted.]
3.403.2
associated switching device
separate switching device which can be replaced independently
3.403.3
integral switching device
switching device constructed as a part of a socket-outlet covered by this document, where
neither the switching device nor the socket-outlet can be replaced independently
3.404
isolation
disconnection of an installation or its discrete section from any source of the electric energy
for purposes of electrical safety
[SOURCE: IEC 60947-1:2020, 3.3.19]
3.405
utilization category (for a switching device)
combination of specified requirements related to the condition in which the switching device
fulfils its purpose, selected to represent a characteristic group of practical applications
Note 1 to entry: The specified requirements may concern e.g. the values of making capacities (if applicable),
breaking capacities and other characteristics, the associated circuits and the relevant conditions of use and
behaviour.
[SOURCE: IEC 60050-411:1984, 441-17-19, modified – Deletion of "or a fuse" from the
domain, and "or the fuse" from the definition.]
3.406
control circuit device
electrical device intended for the controlling, signalling, interlocking, etc. of switchgear and
controlgear
Note 1 to entry: See IEC 60947-1:2020, 3.4.16.
3.407
latching device
part of the interlock mechanism provided to hold a plug or appliance inlet in the socket-outlet
4 General
Clause 4 of IEC 60309-1:2021 or of IEC 60309-2:2021 applies except as follows:
Additional subclause:
4.401 Components incorporated or integrated in products (e.g. flexible cable, current
cut-outs, thermal cut-outs, safety transformers, switches, fuses, residual current devices,
lamp holders and connecting devices) shall comply with the relevant standards as far as they
reasonably apply.
– 8 – IEC 60309-4:2021 © IEC 2021
5 Standard ratings
Clause 5 of IEC 60309-1:2021 applies for products incorporating socket-outlets according to
IEC 60309-1.
Clause 5 of IEC 60309-2:2021 applies with the following addition for products incorporating
socket-outlets according to IEC 60309-2:2021.
Add the following at the end of 5.201:
For switched socket-outlets with or without interlock according to 6.401, the whole unit can
have a different degree of protection but not lower than IP44 (see also 8.1).
6 Classification of accessories
Clause 6 of IEC 60309-1:2021 or of IEC 60309-2:2021 applies except as follows:
6.1 Replacement:
According to purpose:
– fixed socket-outlets,
– portable socket-outlets.
6.5 Not applicable.
Additional subclauses:
6.401 According to switching devices and interlock facilities:
– products with a switching device and without an interlock;
– products with a switching device and with an interlock.
6.402 According to the operation of the interlock/switching device:
– manually;
– automatically (electrically and/or electronically);
– combination of the above.
NOTE Inserting the plug is not considered a manual operation of the interlock/switching device.
6.403 According to the mechanical switching device:
– switch;
– switch-disconnector;
– contactor;
– other devices with suitable switch rating.
6.404 According to suitability for isolation of the switching device:
– suitable for isolation;
– not suitable for isolation.
6.405 According to whether the interlock system has a latching device:
– with latching device (mechanical interlock);

IEC 60309-4:2021 © IEC 2021 – 9 –
– without latch
...