IEC 60309-2:2021

IEC 60309-2 ®
Edition 5.0 2021-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Plugs, fixed or portable socket-outlets and appliance inlets for industrial
purposes –
Part 2: Dimensional compatibility requirements for pin and contact-tube
accessories
Fiches, socles fixes de prise de courant, prises mobiles et socles de connecteur
pour usages industriels –
Partie 2: Exigences dimensionnelles de compatibilité pour les appareils à
broches et alvéoles
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IEC 60309-2 ®
Edition 5.0 2021-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Plugs, fixed or portable socket-outlets and appliance inlets for industrial

purposes –
Part 2: Dimensional compatibility requirements for pin and contact-tube

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

pour usages industriels –
Partie 2: Exigences dimensionnelles de compatibilité pour les appareils à

broches et alvéoles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.30 ISBN 978-2-8322-0000-0

– 2 – IEC 60309-2:2021 © IEC 2021
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General . 8
5 Standard ratings . 8
6 Classification of accessories . 9
7 Marking . 10
8 Dimensions. 12
8.2.1 General . 23
8.2.2 Checking plugs and appliance inlets . 24
8.2.3 Checking socket-outlets . 27
9 Protection against electric shock . 33
10 Provision for earthing . 33
11 Terminals and terminations . 33
12 Interlocks . 35
13 Resistance to ageing of rubber and thermoplastic material . 35
14 Construction . 35
15 Construction of fixed socket-outlets . 38
16 Construction of plugs and portable socket-outlets . 38
17 Construction of appliance inlets . 39
18 Degrees of protection . 39
19 Insulation resistance and dielectric strength . 39
20 Breaking capacity . 40
21 Normal operation . 40
22 Temperature rise . 40
23 Flexible cables and their connection . 40
24 Mechanical strength . 40
25 Screws, current-carrying parts and connections . 40
26 Creepage distances, clearances and distances through sealing compound . 41
27 Resistance to heat, to fire and to tracking . 41
28 Corrosion and resistance to rusting . 41
29 Conditional short-circuit current withstand test . 41
30 Electromagnetic compatibility . 41
Bibliography . 75

Figure 201 – 16/20 A, 32/30 A, 63/60 A and 125/100 A socket-outlets having rated
operating voltages exceeding 50 V – "go" gauges for checking dimensions d , d , l . 18
1 2 1
Figure 202 – 16/20 A, 32/30 A, 63/60 A and 125/100 A socket-outlets having rated
operating voltages exceeding 50 V – "no-go" gauges for checking dimensions d , d . 19
1 2
Figure 203 – 16/20 A, 32/30 A, 63/60 A and 125/100 A plugs and appliance inlets
having rated operating voltages exceeding 50 V – "go" gauges for checking
dimensions d , d , l . 20
2 4 1
Figure 204 – 16/20 A, 32/30 A, 63/60 A and 125/100 A plugs and appliance inlets
having rated operating voltages exceeding 50 V – "NO-GO" gauges for checking
dimensions d , d . 21
2 4
Figure 205 – 16/20 A and 32/30 A socket-outlets having rated operating voltages not

exceeding 50 V – Gauges for checking compatibility . 22
Figure 206 – 16/20 A and 32/30 A plugs and appliance inlets having rated operating
voltages not exceeding 50 V – Gauges for checking compatibility . 23
Figure 207 – "NO-GO" gauges for checking 16/20 A, 32/30 A, 63/60 A and 125/100 A
plugs and appliance inlets having rated operating voltages exceeding 50 V . 25
Figure 208 – 16/20 A and 32/30 A plugs and appliance inlets having rated operating
voltages not exceeding 50 V – Gauges for checking rigidity of enclosures of
thermoplastic material under humid and warm conditions . 25
Figure 209 – Device for testing non-solid pins . 27
Figure 210 – Arrangement for test using "NO-GO" gauge for checking 16/20 A,
32/30 A, 63/60 A and 125/100 A socket-outlets having rated operating voltages
exceeding 50 V . 29
Figure 211 – Gauges for checking socket-outlets of 16/20 A, 32/30 A, 63/60 A and
125/100 A having rated operating voltages exceeding 50 V . 30
Figure 212 – 16/20 A and 32/30 A socket-outlets having rated operating voltages not
exceeding 50 V – Gauges for checking rigidity of enclosures of thermoplastic material

under humid and warm conditions . 31
Figure 213 – Gauge for checking phase holes . 32
Figure 214 – Test of phase hole . 32
Figure 215 – Socket-outlets with enclosures of resilient or thermoplastic material –
Gauge for checking impossibility of single-pole insertion of a 10/16 A 250 V two-pole
plug 33
Figure 216 – Example of apparatus for checking the withdrawal force . 36

Table 201 – Rated currents . 9
Table 202 – Examples of marking for series I . 10
Table 203 – Examples of marking for series II . 10
Table 204 – Accessories with rated operating voltages exceeding 50 V . 13
Table 205 – Accessories with rated operating voltages not exceeding 50 V . 14
Table 206 – Retaining devices . 14
Table 207 – Forces applied to "GO"/"NO-GO" gauges . 15
Table 208 – General purpose accessories with rated operating voltage not exceeding
50 V 16
Table 209 – Special application accessories with rated operating voltage not
exceeding 50 V . 16
Table 210 – Positions of earthing contact . 16
Table 211 – Test forces . 24
Table 212 – Maximum displacement of the gauges . 28
Table 3 – Size of connectable conductors . 34
Table 213 – Pulling force on terminals . 34
Table 214 – Diameter of pins of the test plug . 35

– 4 – IEC 60309-2:2021 © IEC 2021
Table 215 – Maximum withdrawal forces . 36
Table 216 – Withdrawal forces . 37

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PLUGS, FIXED OR PORTABLE SOCKET-OUTLETS AND
APPLIANCE INLETS FOR INDUSTRIAL PURPOSES –

Part 2: Dimensional compatibility requirements
for pin and contact-tube 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 60309-2 has been prepared by subcommittee SC 23H: Plugs,
socket-outlets and couplers for industrial and similar applications, and for electric vehicles, of
IEC technical committee 23: Electrical accessories.
This fifth edition cancels and replaces the fourth edition published in 1999, Amendment 1:2005
and Amendment 2:2012. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of requirements and test for non-solid pins;
b) additional rating IPX9;
c) additional marking to indicate neutral terminal and/or earthing terminal.

– 6 – IEC 60309-2:2021 © IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
23H/481/FDIS 23H/487/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.
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 in
IEC 60309-1:2021.
Clauses, subclauses, figures, tables and notes which are additional to those in
IEC 60309-1:2021 are numbered starting from 201.
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.
PLUGS, FIXED OR PORTABLE SOCKET-OUTLETS AND
APPLIANCE INLETS FOR INDUSTRIAL PURPOSES –

Part 2: Dimensional compatibility requirements
for pin and contact-tube accessories

1 Scope
This document applies to plugs, fixed or portable socket-outlets, and appliance inlets,
hereinafter referred to as accessories, 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 125 A,
primarily intended for industrial use, either indoors or outdoors.
These accessories are intended to be installed by instructed persons or skilled persons only.
NOTE 1 All references for accessories with a rated current of more than 125 A in IEC 60309-1 are not applicable
to this document.
This document applies to accessories with pins and contact-tubes of standardized
configurations.
This document applies to accessories, for use when the ambient temperature is normally within
the range −25 °C to 40 °C.
The use of these accessories on building sites and for agricultural, commercial and domestic
applications is not precluded.
This document applies to accessories with screwless-type terminals or insulation piercing
terminals, with a rated current up to and including 32 A for series I and 30 A for series II.
Socket-outlets or appliance inlets incorporated in or fixed to electrical equipment are within the
scope of this document. This document also applies to accessories intended to be used in
extra-low voltage installations.
NOTE 2 This document does not apply to accessories primarily intended for domestic and similar general purposes.
In locations where special conditions prevail, for example on board ship or where explosions
are liable to occur, additional requirements can be necessary.
2 Normative references
Clause 2 of IEC 60309-1:2021 applies except as follows:
Additional normative references:
IEC 60309-1:2021, Plugs, fixed or portable socket-outlets and appliance inlets for industrial
purposes – Part 1: General requirements
IEC 60364-4-41, Low-voltage electrical installations – Part 4-41: Protection for safety –
Protection against electric shock

– 8 – IEC 60309-2:2021 © IEC 2021
3 Terms and definitions
Clause 3 of IEC 60309-1:2021 applies except as follows:
Additional terms and definitions:
3.201
phase inverter
plug or appliance inlet with operating means to interchange the position of two phase-pins
without disconnecting them from the conductors
3.202
solid pin
pin made from a single homogeneous material, without holes, slots, slits or similar outside the
terminal area
4 General
Clause 4 of IEC 60309-1:2020 applies except as follows:
4.1 Replace the fifth paragraph by the following:
In this document:
2P + E covers both 2P + E and 1P + N + E and
3P + E covers both 3P + E and 2P + N + E
unless specifically excluded (see Table 208).
Additional subclause:
4.201 If gauges are used, they shall be of hardened steel, all corners shall be slightly rounded-
off with a maximum radius of 0,1 mm and, if not otherwise specified, the surface finish for all
N8
measurement surfaces shall be minimum.
5 Standard ratings
Clause 5 of IEC 60309-1:2021 applies except as follows:

5.1 Replace the existing text with the following:
Preferred
rated operating voltage range
or rated operating voltage
20 V to 25 V
40 V to 50 V
100 V to 130 V
200 V to 250 V
277 V
380 V to 415 V
440 V to 460 V
480 V to 500 V
600 V to 690 V
750 V
1 000 V
5.2 Replace the existing text and Table 1 with the following:
Standard rated currents are given in Table 201.
Table 201 – Rated currents
Series I Series II
A A
16 20
32 30
63 60
125 100
Additional subclause:
5.201 The standard IP ratings according to IEC 60529 are:
– IP44,
– IP67,
– IP66/IP67,
– IP67/IP69,
– IP66/IP67/IP69.
6 Classification of accessories
Clause 6 of IEC 60309-1:2021 applies except as follows:
6.2 Not applicable.
– 10 – IEC 60309-2:2021 © IEC 2021
7 Marking
Clause 7 of IEC 60309-1:2021 applies except as follows:
7.1 Replace the sentence before the compliance statement at the end of the subclause by
the following paragraphs:
The symbol indicating the position of the earthing contact or of the minor key or keyway shall
be placed before or above the value for the rated operating voltage and separated from it by a
line.
These markings shall be placed after the marking for rated current, separated from it by a dash
if an oblique line separates the symbol indicating the position of the earthing contact or of the
minor key or keyway from the value for the rated operating voltage.
If a symbol for nature of supply is used, it shall be placed after or below the marking for rated
operating voltage.
For three-phase accessories it is not necessary to mark the voltage phase to neutral, if any.
The marking for rated current(s), position of the earthing contact or the minor key, keyway,
rated operating voltage(s) and nature of supply accordingly may be as follows.
Table 202 – Examples of marking for series I
9 h
16 –
16 A – 9 h/400 V~ 16 – 9 h/400~
400~
9 h
16 –
16 A – 9 h/380-415 V~ 16 – 9 h/380-415~
380 - 415 ~
6 h
32 –
32 A – 6 h/230/400 V~ 32 – 6 h/230/400~
230 / 400 ~
6h
6 h / 220 / 380 V ~ 6 h / 220 / 380 ~ 32
32 A – 32 –
200 / 346 ~
240 / 415 V ~ 240 / 415 V ~
240 / 415 ~
Table 203 – Examples of marking for series II
7 h
20 A –
20 A – 7 h/480 V AC 20 A – 7 h/480~
480 ~
7 h
30 A –
30 A – 7 h/480 V 3 Phase, or 30 A – 7 h/480, 3Φ
480 V, 3Φ
7 h
60 A –
60 A – 7 h/277/480 V, 3 Phase Y 60 A – 7 h/277/480, 3ΦY
277 / 480 V, 3Φ Y
It is allowed to put the symbols for AC (~) [IEC 60417-5032 (2002-10)] and DC ( )
[IEC 60417-5031 (2002-10)] or ( ) [IEC 60417-5006 (2002-10)] after the values.
The drawings of standard sheets 2-I, 2-II, 2-III and 2-lV show accessories with the symbol 6 h,
and those of standard sheets 2-VIII and 2-lX show accessories with the symbol 12 h.

For accessories having rated operating voltages exceeding 50 V, the symbol indicating the
position of the earthing contact shall be a numeral followed by the letter h.
The numeral is derived from the position of the earth contact tube, when compared with the
face of a clock, the socket-outlet being viewed from the front with the keyway at the sixth hour.
For accessories having rated operating voltages not exceeding 50 V, the symbol indicating the
position of the minor key shall be a numeral followed by the letter h.
The numeral is derived from the position of the minor key, when compared with the face of a
clock, the socket-outlet being viewed from the front with the major key at the sixth hour.
For plugs and appliance inlets, the symbol indicating the position of the earthing contact or the
minor keyway shall be the same as that for the corresponding socket-outlet.
Contact tubes of socket-outlets shall be positioned in the clockwise order when viewed from the
front as shown in the standard sheets (see also 7.5).
Pins of plugs and appliance inlets shall be positioned in the opposite order viewed from the
front.
7.4 Replace the existing text with the following:
For plugs and portable socket-outlets, the marking specified in 7.1 shall be easily discernible
when the accessory is wired ready for use.
The marking for insulation voltage shall be on the main part; it shall not be visible when the
accessory is mounted and wired as in normal use.
NOTE The term "ready for use" does not imply that the plug or portable socket-outlet is engaged with its
complementary accessory.
Compliance is checked by inspection.
7.5 Replace the existing text with the following:
For rewireable accessories, the contacts shall be indicated by the following symbols:
– for accessories with three contacts (phase + neutral + earth, or, phase + phase + earth):
L / +, unmarked, (preferred) [IEC 60417-5019 (2006-08)] or [IEC 60417-5017
(2006-08)]
except for Series II clock position 4 h and 5 h which are marked:
N, unmarked, or
– for accessories with four contacts (three-phase + earth):
L1, L2, L3, or , or alternatively 1, 2, 3, or
except for Series II clock position 12 h (phase + centre tap + phase + earth) which is
marked:
L1, N, L2, or
– for accessories with five contacts (three-phase + neutral + earth):
L1, L2, L3, N, or , or alternatively 1, 2, 3, N, or
– for accessories having a rated operating voltage not exceeding 50 V, 8 h clock position for
portable electric incubator: +12, +24.

– 12 – IEC 60309-2:2021 © IEC 2021
These symbols shall be placed close to the relevant terminals; they shall not be placed on
screws, removable washers or other removable parts.
For phase inverters, these symbols shall conform in one position with the requirements of 7.1.
In the other position of the inverting means, the phase marking need not conform.
Additional marking to indicate neutral terminal and/or earthing terminal may be used as follows:
– letter W and/or white colour for neutral;
– letter G and/or green colour for earthing.
No marking is required for terminals for pilot conductors. If they are marked, it is recommended
to use the marking P or PILOT.
The values used with the letters may be written as an index. It is recommended that where
practicable the symbol be used.
Compliance is checked by inspection.
7.7 Add the following footnote reference to Table 2:
c) The 2P + N + E, 12 h, Series II accessories shall use the indicating colour orange.
8 Dimensions
Clause 8 of IEC 60309-1:2021 applies except as follows:
8.1 Replace the existing text with the following:
Accessories shall comply with the relevant standard sheets as specified below. For accessories
having rated operating voltages exceeding 50 V, Table 204 applies.

Table 204 – Accessories with rated operating voltages exceeding 50 V
Accessory Degree of protection Standard sheet
2-I
2-I continuation 1
IP44
2-II
2-II continuation 1
16/20 A and 32/30 A
IP67 2-I
IP67/IP69 2-I continuation 2
IP66/IP67 2-II
IP66/IP67/IP69 2-II continuation 2
2-III
2-III continuation 1
IP44
63/60 A, without pilot contact
2-IV
2-IV continuation 1
IP67 2-III
IP67/IP69 2-III continuation 2
63/60 A and 125/100 A, without
pilot contact
IP66/IP67 2-IV
IP66/IP67/IP69 2-IV continuation 2
2-IIIa
2-III continuation 1
63/60 A, with pilot contact IP44
2-IVa
2-IV continuation 1
IP67 2-IIIa
IP67/IP69 2-III continuation 2
63/60 A and 125/100 A, with pilot
contact
IP66/IP67 2-IVa
IP66/IP67/IP69 2-IV continuation 2
IP44
IP67
Mechanical interlock for 16 A to
IP67/IP69 2-V
125 A accessories
IP66/IP67
IP66/IP67/IP69
For accessories having rated operating voltages not exceeding 50 V, Table 205 applies.

– 14 – IEC 60309-2:2021 © IEC 2021
Table 205 – Accessories with rated operating voltages not exceeding 50 V
Accessory Degree of protection Standard sheet
16/20 A and 32/30 A IP44 2-VIII
2-VIIIa
2-VIII continuation 1
2-IX
2-IXa
2-IX continuation 1
IP67 2-VIII
IP67/IP69 2-VIIIa
IP66/IP67 2-VIII continuation 2
IP66/IP67/IP69 2-IX
2-IXa
2-IX continuation 2
For retaining devices, Table 206 applies.
Table 206 – Retaining devices
Socket-outlets Plugs and appliance inlets
Rated Classification Standard sheet Standard sheet
current according to
Retaining Rated Rated Retaining Rated Rated
of the degree of
means operating operating means operating operating
accessory protection
voltage voltage not voltage voltage not
against
exceeding exceeding exceeding exceeding
A moisture
50 V 50 V 50 V 50 V
16/20 and IP44 Lid 2-I 2-VIII 2-II 2-IX
Lug or
(continuation (continuation (continuation (continuation
cavity
1) 1) 1) 1)
32/30 IP67 Two-ramp 2-II 2-IX
Lug or
system (continuation (continuation
2-I 2-VIII cavity
IP67/IP69
2) 2)
(continuation (continuation and
IP66/IP67
2) 2) bayonet
ring
IP66/IP67/IP69
63/60 IP44 Lid and 2-III 2-IV –
Lug or
two-ramp (continuation – (continuation
cavity
system 1) 1)
IP67 Two-ramp 2-IV –
system (continuation
2-III
IP67/IP69
Bayonet 2)
(continuation –
ring
IP66/IP67
2)
IP66/IP67/IP69
125/100 IP67 Two-ramp 2-IV –
system (continuation
2-III
IP67/IP69
Bayonet 2)
(continuation –
ring
IP66/IP67
2)
a)
IP66/IP67/IP69
a)
When 125/100 A fixed socket-outlets are mounted on or integrated with enclosures, the whole unit can also be
IP44.
Deviations from the dimensions specified in the standard sheets may be made, but only if they
provide a technical advantage and do not adversely affect the purpose and safety of the
accessories complying with the standard sheets, especially with regard to compatibility and
non-compatibility.
Compliance is checked by means of gauges or by measurement for those dimensions not
covered by gauges:
– for accessories having rated operating voltages exceeding 50 V, in accordance with:
• Figure 201 and Figure 202 for socket-outlets;
• Figure 203 and Figure 204 for plugs and appliance inlets;
– for accessories having rated operating voltages not exceeding 50 V, in accordance with:
• Figure 205 and Figure 206 for 16/20 A and 32/30 A accessories.
The gauges shall be moved axially to the centre line of the accessory with a force as shown in
the Table 207, applied for 1 min.
Table 207 – Forces applied to "GO"/"NO-GO" gauges
Rated operating Rated current Force (max.) for Force (max.) for
voltage "GO" gauge "NO-GO" gauge
A
V Series I Series II N
N( )
−1
Not exceeding 50 16 20 150 30
32 30 150 30
Exceeding 50 16 20 60 20
32 30 90 30
63 60 165 55
125 100 240 80
Before the test, the test specimen of insulating material shall be stored at a temperature of
(20 ± 5) °C and a relative humidity between 45 % and 75 % for four weeks.
For accessories having rated operating voltages not exceeding 50 V, the position of the minor
key or keyway shall be as shown in Table 206 or Table 207.
For accessories having rated operating voltages exceeding 50 V, the position of the earthing
contact shall be as shown in Table 208.
Compliance is checked by inspection.

– 16 – IEC 60309-2:2021 © IEC 2021
Table 208 – General purpose accessories with
rated operating voltage not exceeding 50 V
Rated operating Frequency Minor key or
a)
voltage
keyway position
V Hz
20 to 25 50 and 60 No minor key or keyway
40 to 50 50 and 60 12
100 up to and including 200 4
20 to 25 300 2
and 400 3
40 to 50 Over 400 up to and including 500 11
Direct current 10
a)
The minor key or keyway position is indicated by the relevant number (see 7.1).

Table 209 – Special application accessories with
rated operating voltage not exceeding 50 V
Rated Minor key or
Numbers of
operating Rated current Other characteristics and application keyway
poles
a)
voltage position
Portable electric incubators – use at 12 V DC
25 V 32 A 3 8
or 24 V DC on ambulances or helicopters
a)
The minor key or keyway is indicated by the relevant number.

Positions 1 and 9 are reserved for future standardisation. For constructional reasons,
positions 5, 6 and 7 cannot be used.
Table 210 – Positions of earthing contact
Number of Accessories' earthing-
Type Frequency Rated operating voltage
a)
contacts contact position
16/20 A 63/60 A
Hz V
32/30 A 125/100 A
1P+N+E 50 and 60 100 to 130 4 4
Series II 60 277 5 5
100 to 130 4 4
50 and 60
200 to 250 6 6
380 to 415 9 9
50 and 60 480 to 500 7 7
3 contacts 2P+E Supply from an isolating 12 12
Series I transformer
and II
100 up to and Over 50 10 10
including 300
Over 300 up to Over 50 2 2
and including 500
d)
3 3
Over 50 up to and including 250
DC
Over 250 8 8
Number of Accessories' earthing-
Type Frequency Rated operating voltage
a)
contacts
contact position
16/20 A 63/60 A
Hz V
32/30 A 125/100 A
2P+N+E 50 and 60 125/250 12 12
Series II single-phase
Series I 50 and 60 Supply from an isolating 12 12
transformer
100 to 130 4 4
50 and 60 200 to 250 9 9
380 to 415 6 6
b)
60 11 11
440 to 460
4 contacts 3P+E 480 to 500 7 7
50 and 60
Series I 600 to 690 5 5
and II
50 380 3 3
c)
50 and 60 1 000 8 8
100 up to and Over 50 10 10
including 300
Over 300 up to Over 50 2 2
and including 500
57/100 to 75/130 4 4
120/208 to 144/250 9 9
50 and 60 200/346 to 240/415 6 6
277/480 to 288/500 7 7
5 contacts 3P+N+E 347/600 to 400/690 5 5
b)
Series I 60 11 11
250/440 to 265/460
and II
50 220/380 3 3
c)
250/440
50 and 60 1 000 8 8
50 and 60 Supply from an isolating 12 12
3P+N+E
transformer
5 contacts Series I
and II
100 up to and Over 50 10 10
(continued)
including 300
(continued)
Over 300 up to Over 50 2 2
and including 500
All rated operating voltages and/or frequencies 1 1
not covered by other configurations.
All types
This clock position can additionally be used in special
applications where a distinction to standardized
positions is needed
NOTE The positions shown by a dash (–) are not standardized.
a)
The earthing-contact position is indicated by the relevant numeral (see 7.1).
b)
Mainly for marine installations.
c)
Only for refrigerated containers (standardized ISO).
d)
This configuration is required to have an earthing contact because it covers voltages above the upper limits of
ELV (DC) according to IEC 60364-4-41.

– 18 – IEC 60309-2:2021 © IEC 2021

The eccentricity between the centres of d and d shall not exceed 0,05 mm.
1 2
d d l R t
1 2 1 2
Type
0  +0,05 0
Min.
–0,025
–0,05 0  –0,05
16/20 A – 2P + E 44,3 36,0 47,5 3,3 38
16/20 A – 3P + E 50,4 40,8 54,0 3,3 38
16/20 A – 3P + N + E 57,3 46,4 61,3 3,3 38
32/30 A – 2P + E, 3P + E 58,6 47,0 64,6 3,3 48
32/30 A – 3P + N + E 64,7 52,9 71,2 3,3 48
63/60 A 71,0 60,0 77,5 4,8 69
125/100 A 83,0 71,0 89,5 4,8 76

Dimensions in millimetres
(See 4.201)
It shall be possible to insert the appropriate gauge into the socket-outlet.
Figure 201 – 16/20 A, 32/30 A, 63/60 A and 125/100 A
socket-outlets having rated operating voltages exceeding 50 V –
"go" gauges for checking dimensions d , d , l
1 2 1
Dimensions in millimetres
a) Gauge A for checking Ø d b) Gauge B for checking Ø d
1 2
Gauge A Gauge B
Type d d d d
1 2 1 2
+0,05 +0,5 0 0
0 0 –0,5  –0,05
16/20 A – 2P + E 44,73 37,0 43,3 34,47
16/20 A – 3P + E 50,93 41,8 49,4 39,27
16/20 A – 3P + N + E 57,93 47,4 56,3 44,87
32/30 A – 2P + E, 3P + E 59,23 48,0 57,6 45,47
32/30 A – 3P + N + E 65,33 53,9 63,7 51,37
63/60 A 71,83 61,0 70,0 58,47
125/100 A 83,83 72,0 82,0 69,47

Dimensions in millimetres
(See 4.201)
It shall not be possible to insert gauges A and B into the socket-outlet.
Figure 202 – 16/20 A, 32/30 A, 63/60 A and 125/100 A
socket-outlets having rated operating voltages exceeding 50 V –
"no-go" gauges for checking dimensions d , d
1 2
– 20 – IEC 60309-2:2021 © IEC 2021

The eccentricity between the centres of d and d shall not exceed 0,05 mm.
2 4
Gauge
Type d d h l R
2 4 3 1
+0,25
+0,05  +0,05
0 0
a) b)
16/20 A – 2P + E 43,5 37,9 37,05 46,5 47,0 3,2
16/20 A – 3P + E 49,5 42,8 37,05 52,9 53,6 3,2
16/20 A – 3P + N + E 56,1 48,8 37,05 60,1 61,0 3,2
32/30 A – 2P + E, 3P + E 57,3 49,7 46,05 63,2 63,2 3,2
32/30 A – 3P + N + E 63,4 55,6 46,05 69,9 69,9 3,2
63/60 A 69,5 61,5 67,05 75,5 4,2
125/100 A 81,5 72,5 75,55 87,5 4,2
a)
For accessories with metal enclosures.
b)
For accessories with enclosures of insulating material.

Dimensions in millimetres
(See 4.201)
It shall be possible to insert the appropriate gauge into the plug or appliance inlet.
Figure 203 – 16/20 A, 32/30 A, 63/60 A and 125/100 A
plugs and appliance inlets having rated operating voltages exceeding 50 V –
"go" gauges for checking dimensions d , d , l
2 4 1
Dimensions in millimetres
a) Gauge A for checking Ø d b) Gauge B for checking Ø d
2 4
Gauge A Gauge B
Type d d
2 4
0  +0,05
-0,05 0
Accessories with metal Accessories with enclosures
enclosures of insulating material
16/20 A – 2P + E 42,87 39,83 39,43
16/20 A – 3P + E 48,87 44,73 44,33
16/20 A – 3P + N + E 55,47 50,73 50,33
32/30 A – 2P + E, 3P + E 56,47 51,63 51,33
32/30 A – 3P + N + E 62,57 57,53 57,23
63/60 A 68,67 63,53
125/100 A 80,67 75,03
Dimensions in millimetres
(See 4.201)
It shall not be possible to insert gauges A and B into the plug or appliance inlet.
Figure 204 – 16/20 A, 32/30 A, 63/60 A and 125/100 A
plugs and appliance inlets having rated operating voltages exceeding 50 V –
"NO-GO" gauges for checking dimensions d , d
2 4
– 22 – IEC 60309-2:2021 © IEC 2021
Dimensions in millimetres
Key
W Removable pin for three-pole gauge
X Insert for gauge 16/20 A
Y Insert for gauge 32/30 A
Z Stop surface
It shall be possible to insert the appropriate gauge into the socket-outlet so that the stop surface of the gauge comes
into contact with the fr
...