IEC 60309-2:1999

IEC 60309-2
Edition 4.1 2005-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Plugs, socket-outlets and couplers for industrial purposes –
Part 2: Dimensional interchangeability requirements for pin and contact-tube
accessories
Prises de courant pour usages industriels –
Partie 2: Règles d'interchangeabilité dimensionnelle pour les appareils
à broches et alvéoles
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IEC 60309-2
Edition 4.1 2005-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Plugs, socket-outlets and couplers for industrial purposes –
Part 2: Dimensional interchangeability requirements for pin and contact-tube
accessories
Prises de courant pour usages industriels –
Partie 2: Règles d'interchangeabilité dimensionnelle pour les appareils
à broches et alvéoles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CQ
CODE PRIX
ICS 29.120.30 ISBN 2-8318-8368-7

– 2 – 60309-2  CEI:1999+A1:2005

SOMMAIRE
FOREWORD.4

INTRODUCTION.8

1 Domaine d'application .10

2 Définitions .10

3 Références normatives.12

4 Généralités.12

5 Caractéristiques normalisées.12
6 Classification.14
7 Marques et indications.14
8 Dimensions .20
9 Protection contre les chocs électriques.30
10 Dispositions en vue de la mise à la terre .30
11 Bornes et raccordements.30
12 Dispositifs de verrouillage et dispositifs de retenue .36
13 Résistance au vieillissement du caoutchouc et des matières thermoplastiques.36
14 Construction générale .38
15 Construction des socles de prises de courant.40
16 Construction des fiches et des prises mobiles .42
17 Construction des socles de connecteurs.44
18 Degrés de protection .46
19 Résistance d'isolement et rigidité diélectrique .46
20 Pouvoir de coupure .46
21 Fonctionnement normal .46
22 Echauffements .48
23 Câbles souples et leur raccordement.48
24 Résistance mécanique .48
25 Vis, parties transportant le courant et connexions.48
26 Lignes de fuite, distances dans l'air et distances à travers la matière
de remplissage .48

27 Résistance à la chaleur, au feu et aux courants de cheminement .48
28 Corrosion et résistance à la rouille .48
29 Essai de tenue au courant de court-circuit potentiel.50
30 Compatibilité électromagnétique.50

Feuilles de normes .52
Figures .86
Annexe AA (informative) Liste des articles qui requièrent de procéder
à de nouveaux essais .100

60309-2  IEC:1999+A1:2005 – 3 –

CONTENTS
FOREWORD.5

INTRODUCTION.9

1 Scope.11

2 Definitions .11

3 Normative references .13

4 General .13

5 Standard ratings .13
6 Classification.15
7 Marking .15
8 Dimensions .21
9 Protection against electric shock .31
10 Provision for earthing .31
11 Terminals and terminations .31
12 Interlocks and retaining devices .37
13 Resistance to ageing of rubber and thermoplastic material .37
14 General construction .39
15 Construction of socket-outlets .41
16 Construction of plugs and connectors .43
17 Construction of appliance inlets.45
18 Degrees of protection .47
19 Insulation resistance and dielectric strength .47
20 Breaking capacity .47
21 Normal operation.47
22 Temperature rise .49
23 Flexible cables and their connection.49
24 Mechanical strength .49
25 Screws, current-carrying parts and connections.49
26 Creepage distances, clearances and distances through sealing compound .49
27 Resistance to heat, fire and tracking.49

28 Corrosion and resistance to rusting .49
29 Conditional short-circuit current withstand test .51
30 Electromagnetic compatibility .51

Standards sheets.53
Figures .87
Annex AA (informative) List of the clause numbers that require re-testing.101

– 4 – 60309-2 © CEI:1999+A1:2005

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
PRISES DE COURANT POUR USAGES INDUSTRIELS –

Partie 2: Règles d'interchangeabilité dimensionnelle pour

les appareils à broches et alvéoles

AVANT-PROPOS
1) La Commission Electrotechnique Internationale (CEI) est une organisation mondiale de normalisation composée de
l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a pour objet de favoriser
la coopération internationale pour toutes les questions de normalisation dans les domaines de l'électricité et de
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avoir identifié de tels droits de propriété et de ne pas avoir signalé leur existence.

La Norme internationale CEI 60309-2 a été établie par le sous-comité 23H: Prises de courant
à usage industriel, du comité d'études 23 de la CEI: Petit appareillage.
La présente partie 2 doit être lue conjointement avec la partie 1.
La présente version consolidée de la CEI 60309-2 comprend la quatrième édition (1999)
[documents 23H/89/FDIS et 23H/92/RVD] et son amendement 1 (2005) [documents
23H/175/FDIS et 23H/183/RVD].
Le contenu technique de cette version consolidée est donc identique à celui de l'édition de
base et à son amendement; cette version a été préparée par commodité pour l'utilisateur.
Elle porte le numéro d'édition 4.1.
Une ligne verticale dans la marge indique où la publication de base a été modifiée par
l'amendement 1.
60309-2 © IEC:1999+A1:2005 – 5 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
PLUGS, SOCKET-OUTLETS AND COUPLERS

FOR INDUSTRIAL PURPOSES –
Part 2: Dimensional interchangeability 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
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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 23H: Industrial plugs
and socket-outlets, of IEC technical committee 23: Electrical accessories.
This part 2 shall be used in conjunction with part 1.
This consolidated version of IEC 60309-2 consists of the fourth (1999) [documents
23H/89/FDIS and 23H/92/RVD] and its amendment 1 (2005) [documents 23H/175/FDIS and
23H/183/RVD].
The technical content is therefore identical to the base edition and its amendment and has
been prepared for user convenience.
It bears the edition number 4.1.
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
– 6 – 60309-2  CEI:1999+A1:2005

Le comité a décidé que le contenu de la publication de base et de ses amendements ne sera

pas modifié avant la date de maintenance indiquée sur le site web de la CEI sous

"http://webstore.iec.ch" dans les données relatives à la publication recherchée. A cette date,

la publication sera
• reconduite,
• supprimée,
• remplacée par une édition révisée, ou

• amendée.
60309-2  IEC:1999+A1:2005 – 7 –

The committee has decided that the contents of the base publication and its amendments will

remain unchanged until the maintenance result date indicated on the IEC web site under

"http://webstore.iec.ch" in the data related to the specific publication. At this date,

the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or

• amended.
– 8 – 60309-2  CEI:1999+A1:2005

INTRODUCTION
La présente norme comporte plusieurs parties:

Partie 1: Règles générales, qui comprend les articles de caractère général.

Parties suivantes: Règles particulières, traitant de types particuliers. Les articles de ces
règles particulières représentent des compléments ou modifications aux articles
correspondants de la première partie. Si le texte des parties suivantes indique une «addition»

ou un «remplacement» des règles, essais ou commentaires pertinents de la première partie,

ces changements sont introduits dans les passages pertinents de la première partie, et ils

deviennent alors des parties de la norme. Lorsque aucune modification n'est nécessaire, les
mots «L'article de la première partie est applicable» sont utilisés.

60309-2  IEC:1999+A1:2005 – 9 –

INTRODUCTION
This standard is divided into several parts:

Part 1: General requirements, comprising clauses of a general character.

Subsequent parts: Particular requirements dealing with particular types. The clauses of these
particular requirements supplement or modify the corresponding clauses in Part 1. Where the
text of subsequent parts indicates an "addition" to or a "replacement" of the relevant

requirement, test specification or explanation of Part 1, these changes are made to the

relevant text of Part 1, which then becomes part of the standard. Where no change is

necessary, the words "This clause of Part 1 is applicable" are used.

– 10 – 60309-2  CEI:1999+A1:2005

PRISES DE COURANT POUR USAGES INDUSTRIELS –

Partie 2: Règles d'interchangeabilité dimensionnelle pour

les appareils à broches et alvéoles

1 Domaine d'application
Remplacement:
La présente norme s'applique aux prises de courant, aux prolongateurs et aux connecteurs
ayant une tension nominale d'emploi ne dépassant pas 690 V, 500 Hz et un courant nominal
ne dépassant pas 125 A, destinés essentiellement aux usages industriels, à l'intérieur ou à
l'extérieur des bâtiments.
NOTE Toutes références aux appareils ayant un courant nominal dépassant 125 A dans la partie 1 ne sont plus
valables dans cette deuxième partie.
La présente norme s'applique aux prises de courant, aux prolongateurs et aux connecteurs
comportant des broches et des alvéoles de contact, ayant des configurations normalisées.
La présente norme s'applique aux prises de courant, aux prolongateurs et aux connecteurs,
désignés dans la suite du texte sous le nom d'appareils, pour usage dans une température
ambiante comprise normalement dans une plage de –25 °C à 40 °C.
L'usage de ces appareils dans des chantiers de construction et pour des applications
agricoles, commerciales et domestiques n'est pas exclu.
La présente norme s'applique aux appareils équipés de bornes sans vis ou de bornes à
perçage d’isolant, de courant nominal ne dépassant pas 16 A pour la série I et 20 A pour la
série II.
NOTE Dans les pays suivants, la présente norme s'applique aux appareils équipés de bornes sans vis ou
de bornes à perçage d’isolant, de courant nominal ne dépassant pas 32 A pour la série I et 30 A pour la série II:
DE, IT.
Les socles de prises de courant et les socles de connecteurs incorporés ou fixés au matériel
électrique sont compris dans le domaine d'application de la présente norme. La présente
norme s'applique aussi aux appareils destinés à être utilisés dans les installations à très
basse tension.
NOTE La présente norme ne s'applique pas aux appareils destinés essentiellement aux usages domestiques et

aux usages généraux analogues.
Pour l'emploi dans des locaux présentant des conditions particulières, par exemple à bord des navires et dans les
locaux présentant des risques d'explosion, des prescriptions complémentaires peuvent être nécessaires.
2 Définitions
L'article de la partie 1 est applicable avec l'exception suivante:
Paragraphe complémentaire:
2.101
inverseur de phases
une fiche ou un socle de connecteur avec un dispositif permettant d'interchanger la position
de deux broches de phases sans les déconnecter des conducteurs

60309-2  IEC:1999+A1:2005 – 11 –

PLUGS, SOCKET-OUTLETS AND COUPLERS

FOR INDUSTRIAL PURPOSES –
Part 2: Dimensional interchangeability requirements for

pin and contact-tube accessories

1 Scope
Replacement:
This standard applies to plugs and socket-outlets, cable couplers and appliance couplers with
a rated operating voltage not exceeding 690 V, 500 Hz and a rated current not exceeding 125
A, primarily intended for industrial use, either indoors or outdoors.
NOTE All references for accessories with a rated current of more than 125 A in part 1 are not applicable to this
part 2.
This standard applies to plugs and socket-outlets, cable couplers and appliance couplers with
pins and contact tubes of standardized configurations.
This standard applies to plugs and socket-outlets, cable couplers and appliance couplers,
hereinafter referred to as 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 standard applies to accessories with screwless type terminals or insulation piercing
terminals, with a rated current up to and including 16 A for Series I and 20 A for Series II .
NOTE In the following countries, this standard 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 : DE, IT.
Socket-outlets or appliance inlets incorporated in or fixed to electrical equipment are within
the scope of this standard. This standard also applies to accessories intended to be used in
extra-low voltage installations.
NOTE This standard 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 may be necessary.

2 Definitions
This clause of part 1 is applicable except as follows:
Additional subclause:
2.101
phase inverter
a plug or an appliance inlet with operating means to interchange the position of two phase
pins without disconnecting them from the conductors

– 12 – 60309-2  CEI:1999+A1:2005

3 Références normatives
L'article de la partie 1 est applicable avec l'exception suivante:

Addition:
CEI 60617-2: 1996, Symboles graphiques pour schémas – Partie 2: Eléments de symboles,

symboles distinctifs et autres symboles d'application générale

4 Généralités
L'article de la partie 1 est applicable avec l'exception suivante:
4.1 Le dernier alinéa de ce paragraphe de la Partie 1 n’est pas applicable.
Voir Amendement 1 de la CEI 60309-1.
Paragraphe complémentaire:
4.101 Si des calibres sont utilisés, ils doivent être faits en acier trempé. Tous les coins
doivent être légèrement arrondis avec un rayon maximal de 0,1 mm et l'état de surface pour
N8
toutes les surfaces servant aux mesures doit être min., sauf spécification contraire.
Dans cette norme:
2P + inclut 2P + et 1P + N + et
3P + inclut 3P + et 2P + N +
à moins que le contraire ne soit explicitement spécifié (voir Tableau 104).

5 Caractéristiques normalisées
L'article de la partie 1 est applicable avec l'exception suivante:
5.2 Remplacement:
Les courants nominaux normalisés sont donnés dans le Tableau 101.
Tableau 101
Série I Série II
A A
16 20
32 30
63 60
125 100
5.101 Les degrés de protection IP normalisés selon la CEI 60529 sont:
– IP44,
– IP67,
– IP66/IP67
60309-2  IEC:1999+A1:2005 – 13 –

3 Normative references
This clause of part 1 is applicable except as follows:

Addition:
IEC 60617-2:1996, Graphical symbols for diagrams – Part 2: Symbol elements, qualifying

symbols and other symbols having general application

4 General
This clause of part 1 is applicable except as follows:
4.1 The last paragraph of this subclause of Part 1 is not applicable.
See Amendment 1 of IEC 60309-1.
Additional subclause:
4.101 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 the surface finish for all measurement
N8
surfaces shall be min., if not otherwise specified.
In this standard:
2P + covers both 2P + and 1P + N + and
3P + covers both 3P + and 2P + N +
unless specifically excluded (see Table 104).

5 Standard ratings
This clause of part 1 is applicable except as follows:
5.2 Replacement:
Standard rated currents are given in Table 101.
Table 101
Series I Series II
A A
16 20
32 30
63 60
125 100
5.101 The standard IP ratings according to IEC 60529 are:
– IP44,
– IP67,
– IP66/IP67.
– 14 – 60309-2  CEI:1999+A1:2005

6 Classification
L'article de la partie 1 est applicable avec l'exception suivante:

6.1.2 L'article de la Partie 1 est applicable.

7 Marques et indications
L'article de la partie 1 est applicable avec l'exception suivante:

7.1 Modification:
Supprimer la note
Addition:
Le symbole indiquant la position du contact de terre ou de l'ergot ou de la rainure auxiliaire
doit être placé avant ou au-dessus du nombre indiquant la tension nominale d'emploi, et
séparé de celui-ci par une ligne.
Ces indications doivent être placées après celle du courant nominal, un trait les séparant si le
symbole indiquant la position du contact de terre ou de l'ergot ou de la rainure auxiliaire et le
nombre indiquant la tension nominale d'emploi sont séparés par une ligne oblique.
Si l'on utilise un symbole pour la nature du courant, il doit être placé aussitôt après ou
au-dessous de l'indication de la tension nominale d'emploi.
Pour les appareils triphasés il n'est pas nécessaire de marquer la tension phase neutre, si
elle existe.
L'indication du ou des courants nominaux, de la position du contact de terre ou de l'ergot ou
de la rainure auxiliaire, de la ou des tensions nominales d'emploi et de la nature du courant
peut, par exemple, avoir les formes suivantes:
Pour la série I:
9 h
16 A - 9 h/400 V~, ou 16 - 9 h/400~, ou 16 - , ou
400 ~
9 h
16 A - 9 h/380-415 V~, ou 16 - 9 h/380-415~, ou 16 -

380 - 415 ~
6 h
32 A - 6 h/230/400 V~, ou 32 - 6 h/230/400~, ou 32 - , ou
230 / 400 ~
6 h
6 h / 220 / 380 V ~ 6 h / 220 / 380 ~
32 A - , ou 32 - , ou 32 -
220 / 380 ~
240 / 415 V ~ 240 / 415 V ~
240 / 415 ~
60309-2  IEC:1999+A1:2005 – 15 –

6 Classification
This clause of part 1 is applicable except as follows:

6.1.2 This clause of Part 1 is applicable.

7 Marking
This clause of part 1 is applicable except as follows:

7.1 Modification:
Delete the note
Addition:
The symbol indicating the position of the earthing contact or of the minor key or keyway shall
be placed before or above the figure for the rated operating voltage, and separated from it by
a line.
These markings shall be placed after that 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 figure for the rated operating voltage.
If a symbol for nature of supply is used, it shall be placed next to 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:
For series I:
9 h
16 A - 9 h/400 V~, or 16 - 9 h/400~, or 16 - , or
400 ~
9 h
16 A - 9 h/380-415 V~, or 16 - 9 h/380-415~, or 16 -
380 - 415 ~
6 h
32 A - 6 h/230/400 V~, or 32 - 6 h/230/400~, or 32 - , or
230 / 400 ~
6 h
6 h / 220 / 380 V ~ 6 h / 220 / 380 ~
32 A - , or 32 - , or 32 -
220 / 380 ~
240 / 415 V ~ 240 / 415 V ~
240 / 415 ~
– 16 – 60309-2  CEI:1999+A1:2005

Pour la série II
7 h
20 A - 7 h/480 V a.c. ou 20 A - 7 h/480~, ou 20 A -
480 ~
7 h
30 A - 7 h/480 V, 3 Phase, ou 30 A - 7 h/480, 3Φ, ou 30 A -

480 V, 3Φ
7 h
60 A - 7 h/277/480 V, 3 Phase Y, ou 60 A - 7 h/277/480, 3ΦY, ou 60 A -

277 / 480 V, 3Φ Y
Il est permis de mettre les symboles (~) pour courant alternatif et ( ou ) pour courant

continu après les valeurs (CEI 60617-2).
Les dessins figurant sur les feuilles de normes 2-I, 2-II, 2-III et 2-lV représentent des
appareils ayant le symbole 6 h, et ceux figurant sur les feuilles de normes 2-VIII et 2-lX
représentent des appareils ayant le symbole 12 h.
Pour les appareils de tension nominale d'emploi dépassant 50 V, le symbole indiquant la
position du contact de terre doit être une valeur suivie de la lettre h.
La valeur est déduite de la position de l'alvéole de terre, par comparaison à un cadran
d'horloge, le socle de prise de courant ou la prise mobile étant vu de devant et la rainure
étant sur la sixième heure.
Pour les appareils de tension nominale d'emploi ne dépassant pas 50 V, le symbole indiquant
la position de l'ergot doit être une valeur suivie de la lettre h.
La valeur est déduite de la position de l'ergot auxiliaire, par comparaison à un cadran
d'horloge, le socle de prise de courant ou la prise mobile étant vu de devant et l'ergot
principal étant sur la sixième heure.
Pour les fiches et les socles de connecteurs, le symbole indiquant la position du contact de
terre ou de la rainure auxiliaire doit être identique à celui du socle de prise de courant ou de
la prise mobile correspondante.
Les alvéoles des socles de prises de courant et des prises mobiles doivent se trouver dans le sens
de rotation des aiguilles d'une montre, si l'on regarde les alvéoles de l'avant conformément aux
feuilles de normes (voir aussi 7.5)
Les broches des fiches et des socles des connecteurs doivent se trouver dans l'ordre opposé,
si l'on regarde les broches de l'avant.
7.2 L'article de la Partie 1 est applicable.
7.4 Remplacement
Pour les fiches et les prises mobiles, le marquage spécifié en 7.1 doit être distingué lorsque
l'appareil est équipé de ses conducteurs et prêt à l'emploi.
L'indication de la tension d'isolement doit être portée sur la partie principale; elle ne doit pas être
visible lorsque l'appareil est installé et équipé de ses conducteurs comme en usage normal.
NOTE 1 L'expression «prêt à l'emploi» n'implique pas qu'une fiche ou une prise mobile soit engagée dans
l'appareil complémentaire.
NOTE 2 L'expression «partie principale» d'une fiche ou d'une prise mobile désigne la partie qui porte les
contacts.
La conformité est vérifiée par examen.

60309-2  IEC:1999+A1:2005 – 17 –

For series II
7 h
20 A - 7 h/480 V a.c. or 20 A - 7 h/480~, or 20 A -
480 ~
7 h
30 A - 7 h/480 V, 3 Phase, or 30 A - 7 h/480, 3Φ, or 30 A -

480 V, 3Φ
7 h
60 A - 7 h/277/480 V, 3 Phase Y, or 60 A - 7 h/277/480, 3ΦY, or 60 A -

277 / 480 V, 3Φ Y
It is allowed to put the symbols for a.c. (~) and d.c. ( or ) after the values (IEC 60617-2).

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 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 or connector 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 or connector 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 or connector.
Contact tubes of socket-outlets and connectors 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.
7.2 This clause of Part 1 is applicable.

7.4 Replacement
For plugs and connectors, 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 1 The term "ready for use" does not imply that the plug or connector is engaged with its complementary
accessory.
NOTE 2 The term "main part" of a plug or a connector means the part carrying the contacts.
Compliance is checked by inspection.

– 18 – 60309-2  CEI:1999+A1:2005

7.5 Remplacement
Pour les appareils démontables les contacts doivent être repérés par les symboles suivants.

– pour les appareils avec trois contacts (phase + neutre + terre, ou, phase + phase + terre)

L / +, non marqué, ou
sauf pour la série II position 4 h et 5 h qui sont marqués comme suit:

N, non marqué, ou
– pour les appareils avec quatre contacts (trois phases + terre):

L1, L2, L3, ou ou en variante 1, 2, 3 ou

sauf pour la série II position 12 h (monophasé + trou central + monophasé + terre) qui est
marqué:
L1, N, L2, ou
– pour les appareils avec cinq contacts (trois phases + neutre + terre):
L1, L2, L3, N, ou ou en variante 1, 2, 3, N, ou
– pendant un temps, les indications R1, S2, T3 peuvent être utilisées à la place de L1, L2, L3.
– pour les appareils de tension nominale d'emploi inférieure ou égale à 50 V, en position 8 h
pour couveuses électriques portables: +12, +24.
Ces symboles doivent être placés près des bornes correspondantes; ils ne doivent pas être
placés sur des vis, des rondelles amovibles ou d'autres parties amovibles.
Pour les inverseurs de phases ces symboles doivent être conformes avec les prescriptions
de 7.1 dans une seule position. Dans l'autre position du dispositif d'inversion, le marquage
des phases n'a pas besoin d'être conforme.
NOTE Aucun repérage n'est requis pour les bornes des conducteurs pilotes.
Les chiffres utilisés avec des lettres peuvent être écrits en indice. Il est recommandé d'utiliser, si possible, le
symbole
La conformité est vérifiée par inspection.
7.7 Modification:
Le paragraphe de la partie 1 est applicable avec l'adjonction suivante:
Ajouter:
Les appareils 2P + N + terre, 12 h, de la série II, doivent utiliser des indications de couleur orange.

60309-2  IEC:1999+A1:2005 – 19 –

7.5 Replacement
For rewirable accessories, the contacts shall be indicated by the following symbols.

– for accessories with three contacts (phase + neutral + earth, or, phase + phase + earth):

L / +, unmarked, or
except for Series II clock position 4 h and 5 h which are marked:

N, unmarked, or
– for accessories with four contacts (three phase + ear
...

IEC 60309-2 ®
Edition 4.2 2012-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Plugs, socket-outlets and couplers for industrial purposes –
Part 2: Dimensional interchangeability requirements for pin and contact-tube
accessories
Prises de courant pour usages industriels –
Partie 2: Règles d'interchangeabilité dimensionnelle pour les appareils à
broches et alvéoles
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IEC 60309-2 ®
Edition 4.2 2012-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Plugs, socket-outlets and couplers for industrial purposes –

Part 2: Dimensional interchangeability requirements for pin and contact-tube

accessories
Prises de courant pour usages industriels –

Partie 2: Règles d'interchangeabilité dimensionnelle pour les appareils à

broches et alvéoles
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX CR
ICS 29.120.30 ISBN 978-2-88912-054-3

– 2 – 60309-2  IEC:1999+A1:2005

+A2:2012
CONTENTS
FOREWORD . 4

INTRODUCTION . 6

1 Scope . 7

2 Definitions . 7

3 Normative references . 8

4 General . 8

5 Standard ratings . 8

6 Classification . 9

7 Marking . 9
8 Dimensions . 12
9 Protection against electric shock . 17
10 Provision for earthing . 17
11 Terminals and terminations . 17
12 Interlocks and retaining devices . 20
13 Resistance to ageing of rubber and thermoplastic material . 20
14 General construction . 21
15 Construction of socket-outlets . 22
16 Construction of plugs and connectors . 23
17 Construction of appliance inlets . 24
18 Degrees of protection . 25
19 Insulation resistance and dielectric strength . 25
20 Breaking capacity . 25
21 Normal operation . 25
22 Temperature rise . 26
23 Flexible cables and their connection . 26
24 Mechanical strength . 26
25 Screws, current-carrying parts and connections . 26
26 Creepage distances, clearances and distances through sealing compound . 26
27 Resistance to heat, fire and tracking . 26
28 Corrosion and resistance to rusting . 26

29 Conditional short-circuit current withstand test . 26
30 Electromagnetic compatibility . 26

Standards sheets . 54
Figures . 91
Annex AA (informative) List of the clause numbers that require re-testing . 105

Table 101 . 8
Table 102 . 12
Table 103-1 – General purpose accessories with rated voltage not exceeding 50 V . 13
Table 103-2 – Special application accessories with rated voltage not exceeding 50 V . 13
Table 104 . 14
Table 105 . 16

60309-2  IEC:1999+A1:2005 – 3 –

+A2:2012
Table 106 . 17

Table 107 – Size of connectable conductors . 19

Table 108 . 20

Table 109 . 21

Table 110 . 22

Table 111 . 23

Table 112 . 23

– 4 – 60309-2  IEC:1999+A1:2005

+A2:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
PLUGS, SOCKET-OUTLETS AND COUPLERS

FOR INDUSTRIAL PURPOSES –
Part 2: Dimensional interchangeability 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 23H: Industrial plugs
and socket-outlets, of IEC technical committee 23: Electrical accessories.
This part 2 shall be used in conjunction with part 1.
This consolidated version of IEC 60309-2 consists of the fourth (1999) [documents
23H/89/FDIS and 23H/92/RVD], its amendment 1 (2005) [documents 23H/175/FDIS and
23H/183/RVD] and its amendment 2 (2012) [documents 23H/275/FDIS and 23H/280/RVD].
The technical content is therefore identical to the base edition and its amendments and has
been prepared for user convenience.
It bears the edition number 4.2.
A vertical line in the margin shows where the base publication has been modified by
amendments 1 and 2.
60309-2  IEC:1999+A1:2005 – 5 –

+A2:2012
The committee has decided that the contents of the base publication and its amendments will

remain unchanged until the stability date indicated on the IEC web site under

"http://webstore.iec.ch" in the data related to the specific publication. At this date, the

publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or

• amended.
– 6 – 60309-2  IEC:1999+A1:2005

+A2:2012
INTRODUCTION
This standard is divided into several parts:

Part 1: General requirements, comprising clauses of a general character.

Subsequent parts: Particular requirements dealing with particular types. The clauses of these
particular requirements supplement or modify the corresponding clauses in Part 1. Where the
text of subsequent parts indicates an "addition" to or a "replacement" of the relevant

requirement, test specification or explanation of Part 1, these changes are made to the

relevant text of Part 1, which then becomes part of the standard. Where no change is

necessary, the words "This clause of Part 1 is applicable" are used.

60309-2  IEC:1999+A1:2005 – 7 –

+A2:2012
PLUGS, SOCKET-OUTLETS AND COUPLERS

FOR INDUSTRIAL PURPOSES –
Part 2: Dimensional interchangeability requirements for

pin and contact-tube accessories

1 Scope
Replacement:
This standard applies to plugs and socket-outlets, cable couplers and appliance couplers with
a rated operating voltage not exceeding 1 000 V, 500 Hz and a rated current not exceeding
125 A, primarily intended for industrial use, either indoors or outdoors.
NOTE All references for accessories with a rated current of more than 125 A in part 1 are not applicable to this
part 2.
This standard applies to plugs and socket-outlets, cable couplers and appliance couplers with
pins and contact tubes of standardized configurations.
This standard applies to plugs and socket-outlets, cable couplers and appliance couplers,
hereinafter referred to as 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 standard 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 standard. This standard also applies to accessories intended to be used in
extra-low voltage installations.
NOTE This standard 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 may be necessary.

2 Definitions
This clause of part 1 is applicable except as follows:
Additional subclause:
2.101
phase inverter
a plug or an appliance inlet with operating means to interchange the position of two phase
pins without disconnecting them from the conductors

– 8 – 60309-2  IEC:1999+A1:2005

+A2:2012
3 Normative references
This clause of part 1 is applicable except as follows:

Addition:
IEC 60364-4-41, Low-voltage electrical installations – Part 4-41: Protection for safety –

Protection against electric shock

IEC 60617-2:1996, Graphical symbols for diagrams – Part 2: Symbol elements, qualifying

symbols and other symbols having general application

4 General
This clause of part 1 is applicable except as follows:
4.1 The last paragraph of this subclause of Part 1 is not applicable.
See Amendment 1 of IEC 60309-1.
Additional subclause:
4.101 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 the surface finish for all measurement
N8
surfaces shall be min., if not otherwise specified.
In this standard:
covers both 2P + and 1P + N + and
2P +
3P + covers both 3P + and 2P + N +
unless specifically excluded (see Table 104).

5 Standard ratings
This clause of part 1 is applicable except as follows:
5.2 Replacement:
Standard rated currents are given in Table 101.

Table 101
Series I Series II
A A
16 20
32 30
63 60
125 100
5.101 The standard IP ratings according to IEC 60529 are:
– IP44,
– IP67,
– IP66/IP67.
60309-2  IEC:1999+A1:2005 – 9 –

+A2:2012
6 Classification
This clause of part 1 is applicable except as follows:

6.1.2 This clause of Part 1 is applicable.

7 Marking
This clause of part 1 is applicable except as follows:

7.1 Modification:
Delete the note
Addition:
The symbol indicating the position of the earthing contact or of the minor key or keyway shall
be placed before or above the figure for the rated operating voltage, and separated from it by
a line.
These markings shall be placed after that 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 figure for the rated operating voltage.
If a symbol for nature of supply is used, it shall be placed next to 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:
For series I:
9 h
16 A - 9 h/400 V~, or 16 - 9 h/400~, or 16 - , or
400 ~
9 h
16 A - 9 h/380-415 V~, or 16 - 9 h/380-415~, or 16 -
380 - 415 ~
6 h
32 A - 6 h/230/400 V~, or 32 - 6 h/230/400~, or 32 - , or
230 / 400 ~
6 h
6 h / 220 / 380 V ~ 6 h / 220 / 380 ~
32 A - , or 32 - , or 32 -
220 / 380 ~
240 / 415 V ~ 240 / 415 V ~
240 / 415 ~
– 10 – 60309-2  IEC:1999+A1:2005

+A2:2012
For series II
7 h
20 A - 7 h/480 V a.c. or 20 A - 7 h/480~, or 20 A -
480 ~
7 h
30 A - 7 h/480 V, 3 Phase, or 30 A - 7 h/480, 3Φ, or 30 A -

480 V, 3Φ
7 h
60 A - 7 h/277/480 V, 3 Phase Y, or 60 A - 7 h/277/480, 3ΦY, or 60 A -

277 / 480 V, 3Φ Y
It is allowed to put the symbols for a.c. (~) and d.c. ( or ) after the values (IEC 60617-2).

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 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 or connector 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 or connector 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 or connector.
Contact tubes of socket-outlets and connectors 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.
7.2 This clause of Part 1 is applicable.

7.4 Replacement
For plugs and connectors, 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 1 The term "ready for use" does not imply that the plug or connector is engaged with its complementary
accessory.
NOTE 2 The term "main part" of a plug or a connector means the part carrying the contacts.
Compliance is checked by inspection.

60309-2  IEC:1999+A1:2005 – 11 –

+A2:2012
7.5 Replacement
For rewirable accessories, the contacts shall be indicated by the following symbols.

– for accessories with three contacts (phase + neutral + earth, or, phase + phase + earth):

L / +, unmarked, or
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 a period of time the marking R1, S2, T3 may be used instead of L1, L2, L3.
– for accessories having a rated operating voltage not exceeding 50 V, 8 h clock position for
portable electric incubator : +12, +24.
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.
NOTE The terminals for pilot conductors are not required to be indicated.
The figures 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 Modification:
This subclause of part 1 is applicable except for the following addition:
Add:
The 2P + N + earth, 12 h, Series II accessories shall use the indicating colour orange.

– 12 – 60309-2  IEC:1999+A1:2005

+A2:2012
8 Dimensions
This clause of part 1 is applicable except as follows:

8.1 Replacement:
Accessories shall comply with the relevant standard sheets as specified below:

– accessories having rated operating voltages exceeding 50 V:

• 16/20 A and 32/30 A: . Sheets 2-I and 2-II;

• 63/60 A and 125/100 A, without pilot contact:. Sheets 2-III and 2-IV;

• 63/60 A and 125/100 A, with pilot contact: . Sheets 2-IIIa and 2-IVa;
• mechanical interlock for 16 A to 125 A accessories . Sheet 2-V
– accessories having rated operating voltage not exceeding 50 V:
16/20 A and 32/30 A: .… Sheets 2-VIII and 2-IX.
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 interchangeability
and non-interchangeability.
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 according to:
• Figures 101 and 102 for socket-outlets and connectors;
• Figures 107 and 108 for plugs and appliance inlets;
– for accessories having rated operating voltages not exceeding 50 V according to:
• Figures 110 and 112 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 102, applied for 1 min.
Table 102
Rated current
Rated operating Force (max.) for Force (max.) for
voltage "GO" gauge "NOT GO" gauge
A
N ( )
V Series I Series II N
−1
Not exceeding 50 V 16 20 150 30
32 30 150 30
Exceeding 50 V 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 Tables 103-1 or 103-2

60309-2  IEC:1999+A1:2005 – 13 –

+A2:2012
For accessories having rated operating voltages exceeding 50 V, the position of the earthing

contact shall be as shown in Table 104.

Compliance is checked by inspection.

Table 103-1 – General purpose accessories with rated voltage
not exceeding 50 V
Rated operating
Frequency Minor key or
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
*  The minor key or keyway position is indicated by the relevant number (see 7.1).

Table 103-2 – Special application accessories with rated voltage not exceeding 50 V
Rated Minor key or
Numbers of
operating Rated current Other characteristics and application keyway
poles
voltage position *
Portable electric incubators – use at 12 V d.c. or
25 V 32 A 3 8
24 V d.c. on ambulances or helicopters
* 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.

– 14 – 60309-2  IEC:1999+A1:2005

+A2:2012
Table 104
Number of Accessories earthing-

Type Frequency Rated operating voltage
contacts a
contact position
16/20 A 63/60 A
Hz V
32/30 A 125/100 A
1P+N+ 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 Supply from an isolating 12 12
2P+
transformer
Series I
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
Direct current
Over 250 8 8
2P+N+ 50 and 60 125/250 12 12
single-phase
Series II
Series I 50 and 60 Supply from an isolating 12 12
transformer
7100 to 130 4 4
50 and 60 200 to 250 9 9
380 to 415 6 6
60 b 11 11
440 to 460
4 contacts 3P+ 480 to 500 7 7
50 and 60
Series I 600 to 690 5 5
and II
50 380 3 3
60 c
50 and 60 1000 - 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+ 347/600 to 400/690 5 5
Series I 60 b 11 11
250/440 to 265/460
and II
50 220/380 3 3
60 c
250/440
60309-2  IEC:1999+A1:2005 – 15 –

+A2:2012
Table 104 (2 of 2)
Number of Accessories earthing-

Type Frequency Rated operating voltage
contacts a
contact position
16/20 A 63/60 A
Hz V
32/30 A 125/100 A
50 and 60 Supply from an isolating 12 12

transformer
100 up to and Over 50 10 10
including 300
Over 300 up to Over 50 2 2
and including 500
All types All rated operating voltage and/or frequencies 1 1
not covered by other configurations.
This clock counter 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 (d.c.) according to IEC 60364-4-41.

8.2 Replacement:
For accessories having rated operating voltages exceeding 50 V, it shall not be possible to
engage plugs or connectors with socket-outlets or appliance inlets having different ratings, or
having different contact combinations.
In addition, for all accessories the design shall be such that improper connections shall not be
possible between:
– the earth and/or pilot plug-contact and a live socket-contact, or a live plug-contact and the
earth and/or pilot socket-contact;
– the phase plug-contacts and the neutral socket-contact, if any;
– the neutral plug-contact and a phase socket-contact.

Compliance is checked by inspection, with the following exception:
For the two last indents, compliance is not required between three contacts accessories
Series I and II, 4 h, since these have reciprocal contact positions.
NOTE These conflicting versions have both been in use for many years and resolution of this problem has been
found to be impractical.
It shall not be possible to engage plugs with socket-outlets or connectors having different
earthing-contact positions or minor key positions.
Compliance is checked by inspection and tests using the methods indicated below. These
tests are made after storage of test specimens of insulating material at a temperature of
(20 ± 5) °C and with relative humidity between 45 % and 75 % for four weeks.
For accessories having thermoplastic housing, this test is made at a temperature of (35 ± 2) °C,
both the accessories and the gauges being at this temperature.

– 16 – 60309-2  IEC:1999+A1:2005

+A2:2012
a) Checking plugs and appliance inlets

For plugs and appliance inlets with rated operating voltage exceeding 50 V, gauges

according to Figure 109 are used.

For plugs and appliance inlets with rated operating voltage not exceeding 50 V, gauges
according to Figure 113 are used.

First test (key)
The socket-gauge shown in Figure 109 is placed before the plug in such a way that during

the test the key shall hit the lower part of the shroud of the gauge approximately in the

middle.
The force F is slowly increased in such a way that the total force given in Table 105 is

exerted after 15 s. After that the full force is applied for 1 min.

The forces used are given in Table 105.
Table 105
Rated current
A 16/20 32/30 63/60 125/100
Series I/II
Force F N 175 210 385 560
When the force is applied the gauge is not permitted to move more than 4 mm in relation to
the shroud of the plug or appliance inlet.
After the test, the plug and appliance inlet shall not be damaged in such a way that
impairs further use of the accessory.
These forces are equal to 1,4 times the corresponding withdrawal forces.
Second test (earth-pin)
The force F shall be applied to the earth-pin in the same manner and for the same
duration as in the previous test.
After that test, the plug and appliance inlet shall comply with the relevant standard sheet.
b) Checking socket-outlets and connectors
For socket-outlets and connectors having rated operating voltages exceeding 50 V,
gauges according to Figure 104 are used.
For socket-outlets and connectors having rated operating voltages not exceeding 50 V,
gauges according to Figure 111 are used.
First test (shroud)
The first test is carried out on all different clock positions, except for the one
corresponding to the socket-outlet or connector to be used.

The test specimen shall be fixed and supported in such a way that the rigidity of the
socket-outlet or connector is not influenced.
Arrangement for test shall be according to Figure 103.
The gauge shown in Figure 104 shall hit two opposite points of the accessory at the same
time. The axis of the gauge and of the accessory shall be approximately parallel and the
chamfer shall be equally divided in both sides.
The force F is slowly increased in such a way that the total force given in Table 105 is
exerted after 15 s. After that the full force is applied for 1 min.
When the force is applied, the gauge is not permitted to move more than 4 mm in relation
to the shroud of the socket-outlet or connector.
After the test, the socket-outlet of the connector shall not be damaged to the extent of
impairing the further use of the accessory.
Second test (holes)
For the second test, the gauge shown in Figure 105 is inserted in each phase hole.

60309-2  IEC:1999+A1:2005 – 17 –

+A2:2012
The gauge shall not enter the phase hole by a greater distance than that shown in

Table 106 measured from the front of the internal part (see Figure 106).

The same forces and duration and the same method of application are used as for the

previous test.
Table 106
Rated current
A 16/20 32/30 63/60 125/100
Series I/II
Distance X mm 11 12,5 15 20
8.3 Addition:
Compliance is checked by manual test and, for accessories with enclosures of resilient or
thermoplastic material, by means of the gauge shown in Figure 114.
The gauge is applied with a force of 200 N for 1 min. For accessories with enclosures of
thermoplastic material the gauge is applied at a temperature of (35 ± 2) °C, both the
accessories and the gauge being at this temperature.
NOTE For accessories of rigid material, such as metal, thermosetting resins, ceramic material and the like,
conformity to the relevant standard sheets ensures compliance with this requirement.

9 Protection against electric shock
This clause of part 1 is applicable except as follows:
9.1 Addition:
Conformity with the relevant standard sheets ensures compliance with the requirement as far
as inaccessibility of contacts during insertion of a plug or connector into the complementary
accessories is concerned.
9.2 Addition:
Conformity with the relevant standard sheets ensures compliance with these requirements.
10 Provision for earthing
This clause of part 1 is applicable.
11 Terminals and terminations
This clause of Part 1 is applicable except as follows:
11.2.1 Addition:
Screw type terminals may be identified by the terminal sizes given in the Table 107.
NOTE For screw type terminals not identified by terminal sizes given in the Table 107, Part 1 is applicable.
Screw type terminals identified by terminal sizes shall comply with standard sheets as
specified in 11.101 of this standard and are not subject to test as in 11.5 of Part 1.

– 18 – 60309-2  IEC:1999+A1:2005

+A2:2012
Add the following new subclause:

11.101 Screw type terminals identified by terminal sizes

11.101.1 Terminals shall comply with the standard sheets as specified below, except those

for standard sheets 2-X, 2-XI and 2-XII. For these standard sheets, the length of thread in the

fixed part or nut and the length of thread on the screw or stud may be reduced, if the

mechanical strength of the terminal is adequate and at least two full threads of every

clamping screw are in engagement when a conductor of the most unfavourable cross-

sectional area is clamped.
Standard sheet 2-X applies to pillar terminals.

Standard sheet 2-XI applies to screw terminals and stud terminals.
Standard sheet 2-XII applies to saddle terminals.
Standard sheet 2-XIII applies to lug terminals.
Mantle terminals shall comply with standard sheet 2-X with regard to the dimensions D and e.
Terminals which are essentially of the pillar type, but with the part with the hole for the
conductor slotted to enable the conductor to be moved laterally into position, shall comply
with standard sheet 2-X. Anyhow, the maximum gap between the conductor restraining parts
on the side where the slot is located shall comply with standard sheet 2-XI.
If the required length of thread in a terminal screw hole is obtained by plunging, the edge of
the extrusion shall be reasonably smooth and the length of the thread shall exceed the
specified minimum value by at least 0,5 mm.
Compliance is checked by inspection, by measurement and, for terminals with a reduced
length of thread, by test of 11.101.2.
The maximum gap between the conductor restraining parts is checked by means of a steel
gauge pin with a diameter equal to e ± 0,05 mm.
For terminals without pressure plate(s) or the like, complying with standard sheet 2-X, the
clamping screw is screwed fully home without a conductor in position. It shall not then be
possible to insert the gauge pin between the threaded part of the screw and the wall of the
conductor space.
For terminals complying with standard sheet 2-XI, and for terminals with a pressure plate or
the like complying with standard sheet 2-X, where it is not appropriate to insert the gauge pin
in all positions, a conductor is clamped in the terminal.
For terminals complying with standard sheet 2-X, the conductor is in the form of a rod with a
diameter equal to that corresponding to the middle cross-sectional area of the range specified

for the particular terminal, and having a flat end perpendicular to the axis.
For terminals complying with standard sheet 2-XI, the conductor is solid and has a diameter D
as specified in this standard sheet.
With this conductor in position, it shall not be possible to insert the gauge pin, applied in a
direction parallel to the axis of the conductor, into any gap through which a wire of a stranded
conductor might escape.
The minimum distance between the clamping screw and the end of the conductor, when fully
inserted, is specified in standard sheet 2-X. It is checked by means of the rod conductor
specified above, which shall pass into the conductor space for a distance, beyond the
threaded hole, at Ieast equal to the minimum distance specified.
For terminals with pressure plate(s) complying with standard sheet 2-X, the gauge pin is
applied to the gap between the pressure plate and the wall of the conductor space.

60309-2  IEC:1999+A1:2005 – 19 –

+A2:2012
The following negative deviations from the specified values are allowed for the minimum

nominal thread diameter of the screw:

– 0,15 mm for screws with a nominal diameter not exceeding 5 mm;

– 0,22 mm for screws with a nominal diameter over 5 mm but not exceeding 10 mm;

– 0,27 mm for screws with a nominal diameter of over 10 mm.

This subclause does not exclude terminals of types other than those shown in the standard

sheets. Such terminals shall, however, comply with the other requirements of this clause as

far as is reasonable, and it may be necessary to formulate additional requirements.

If the thread in the fixed part or nut is recessed, the total length of the shank of headed

screws shall be increased accordingly.
If one or more of the dimensions are larger than the minimum values specified in the standard
sheets, the other dimensions need not be correspondingly increased, but departures from the
specified values shall not impair the function of the terminal.
11.101.2 Terminals complying with standard sheet 2-X, but with a reduced length of thread,
are fitted with a conductor of the smallest cross-sectional area specified in Table 107, tightly
clamped, or a conductor of the largest cross-sectional area specified in this table, lightly
clamped, whichever is the most unfavourable.
Table 107 – Size of connectabl
...