IEC 60320-2-4:2005/AMD1:2009

Amendment 1 - Appliance couplers for household and similar general purposes - Part 2-4: Couplers dependent on appliance weight for engagement

Connecteurs pour usages domestiques et usages généraux analogues - Partie 2-4: Connecteurs à connexion par gravité

General Information

• Status: Published
• Publication Date: 12-Oct-2009
• ICS: 29.120.20 - Connecting devices
• Technical Committee: SC 23G - Appliance couplers
• Drafting Committee: MT 4 - TC 23/SC 23G/MT 4
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 29-Jun-2018

Relations

• Revised: IEC 60320-2-4:2018 - Appliance couplers for household and similar general purposes - Part 2-4: Couplers dependent on appliance weight for engagement
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60320-2-4

®

Edition 1.0 2009-10



INTERNATIONAL



STANDARD



NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Appliance couplers for household and similar general purposes –
Part 2-4: Couplers dependent on appliance weight for engagement

Connecteurs pour usages domestiques et usages généraux analogues –
Partie 2-4: Connecteurs à connexion par gravité


IEC 60320-2-4:2005/A1:2009

---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 60320-2-4


®

Edition 1.0 2009-10



INTERNATIONAL



STANDARD



NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Appliance couplers for household and similar general purposes –
Part 2-4: Couplers dependent on appliance weight for engagement

Connecteurs pour usages domestiques et usages généraux analogues –
Partie 2-4: Connecteurs à connexion par gravité


INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
L
CODE PRIX
ICS 29.120.20 ISBN 978-2-88910-122-1
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – 60320-2-4 Amend.1 © IEC:2009



FOREWORD


This amendment has been prepared by subcommittee 23G: Appliance couplers, of IEC

technical committee 23: Electrical accessories.


The text of this amendment is based on the following documents:


CDV Report on voting

23G/290/CDV 23G/291/RVC



Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication 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.
_____________

1 Scope
Replace the existing NOTE 2 as follows:
NOTE 2 Appliance couplers dependent on appliance weight for engagement may be subject to spillage of liquid in
normal use. They are classified according to whether protection against liquid spillage is provided, when installed
in accordance with the manufacturer’s installation instructions.
2 Normative references
Add the following new references to the list:
IEC/TR 60083, Plugs and socket-outlets for domestic and similar general use standardized

in member countries of IEC
IEC 60112, Method for the determination of the proof and the comparative tracking indices
of solid insulating materials
IEC 60730 (all parts), Automatic electrical controls for household and similar use
IEC 61058-1, Switches for appliances – Part 1: General requirements
Modify the following references:
IEC 60320-1, Appliance couplers for household and similar general purposes – Part 1:
General requirements

---------------------- Page: 4 ----------------------
60320-2-4 Amend.1 © IEC:2009 – 3 –


IEC 60335-1, Household and similar electrical appliances – Safety – Part 1: General

requirements


IEC 60664-1, Insulation coordination for equipment within low voltage systems − Part 1:

Principles, requirements and tests



5 General notes on tests


5.2

Replace the third paragraph as follows:
For those clauses requiring the tests to be carried out on weight-engaged connectors and
weight-engaged appliance inlets installed in accordance with the manufacturer’s instructions,
representative appliances or appliance parts shall be supplied.
5.5
Replace the second dashed item in the second paragraph by the following:
− set 2 of three specimens is subjected to the tests of Clauses 14, 15, 16, 19, 20, 21 and
25.101 (including the repetition of Clause 16).
Replace the third paragraph as follows:
For weight-engaged connectors which are declared as providing protection against liquid
spillage, three additional specimens are required, which are subjected to the test of 14.2.
7 Classification
7.1.1
Replace the existing text with the following new text:
According to whether or not protection against liquid spillage is provided when the connector
is installed according to the manufacturer’s instructions.
7.1.5
Add the following text to the note:

A cycle is two strokes as defined in Clause 19; that is one connection followed by one disconnection.
Add the following new Subclauses 7.1.6 to 7.1.6.7:
7.1.6 The following information is recorded to cover required tests.
7.1.6.1 According to the specified minimum cross-sectional area of cord.
7.1.6.2 According to the maximum allowable terminal temperature rise.
7.1.6.3 According to the maximum allowable termination temperature rise.
7.1.6.4 According to the maximum allowable contact temperature rise.
7.1.6.5 According to the minimum appliance weight required for correct engagement.

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– 4 – 60320-2-4 Amend.1 © IEC:2009


7.1.6.6 According to the minimum base weight required for correct disengagement.


7.1.6.7 According to maximum pin temperature at the base of the pins of the corresponding

appliance inlet:


– appliance couplers for cold conditions (pin temperature not exceeding 70 °C);

– appliance couplers for hot conditions (pin temperature not exceeding 120 °C);

– appliance couplers for very hot conditions (pin temperature not exceeding

155 °C).


NOTE Temperature rise limits apply to both the inlet and connector, and can be specified separately if required.

8 Marking
8.101
Replace the existing subclause as follows:
Instructions for installation and use shall be supplied with weight-engaged appliance couplers.
These instructions shall contain the information necessary to ensure compliance with this
standard and shall contain the classifications declared by the manufacturer according to
Clause 7.
For weight-engaged couplers intended to be exclusively delivered to the equipment
manufacturer, the instruction sheet may be replaced by a leaflet, letter, or drawing, etc. It is
not necessary for each coupler to be accompanied by such a document.
10 Protection against electric shock
10.1
Replace the existing paragraph with the following:
Appliance couplers shall be so designed that live parts of the appliance inlets are not
accessible when the connector is in partial or complete engagement.
Weight-engaged appliance connectors shall be so designed that the live parts and parts
connected thereto are not accessible when the connector is properly assembled and wired as
in normal use.

Note 2 is not applicable.
Add the following new paragraph:
10.2 This clause of IEC 60320-1 applies amended as follows.
NOTE To be assessed when incorporated in the end product.
Add the following new subclause:
10.101 Test probe 13 of IEC 61032 is applied without appreciable force through openings in
appliance connectors.
NOTE “Without appreciable force” is considered to be a force not exceeding 1 N.
It shall not be possible to touch live parts with the test probe.

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60320-2-4 Amend.1 © IEC:2009 – 5 –


11 Provision for earthing


11.2


Replace the existing text with the following new text:


The note of this subclause is not applicable.


12 Terminals and terminations


Replace the second line as follows:

“Replace the first two paragraphs as follows:”
Add the following new subclause:
12.3 This subclause of IEC 60320-1 does not apply.
13 Construction
13.1
Replace the existing text with the following:
The note of this subclause is not applicable.
13.4
Replace the first paragraph as follows:
Pins of weight-engaged appliance inlets shall
• be securely retained,
• have adequate mechanical strength,
• not be possible to remove without the aid of a tool, and
• live parts shall be surrounded by a shroud.
13.12

Replace the first three paragraphs as follows:
Fuses, relays, thermostats and thermal cut-outs incorporated in weight-engaged connectors
and weight-engaged appliance inlets shall comply with the relevant IEC standards.
Switches or energy regulators incorporated in weight-engaged connectors or weight-engaged
appliance inlets shall comply with IEC 61058 and IEC 60730 respectively.
Where an weight-engaged appliance inlet is integrated in or incorporated in an appliance or
equipment, then that part which can be identified as the appliance inlet shall comply with the
requirements of this standard.

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– 6 – 60320-2-4 Amend.1 © IEC:2009


14 Moisture resistance


14.2


Replace the existing text with the following new text:


14.2 Weight-engaged connectors which are declared as providing protection against liquid

spillage shall be constructed so that, when installed into a representative power base, in

accordance with manufacturer’s installation instructions, the connector is not affected by

liquid.


Compliance is checked by the following test:
The power base is placed on a horizontal surface and 30 ml of de-ionised water containing
approximately 1 % NaCl is poured over the appliance connector through a vertical tube
30 mm long and having an internal diameter of 8 mm. The outlet of the tube is located
200 mm above the upper surface of the connector and the saline solution is poured steadily
over a period of 2 s. For connectors having multiple contact apertures spaced more than
30 mm apart this test is repeated on clean samples of the power base over each contact
aperture or aperture group.
The representative power base and connector installation shall then withstand the electric
strength test of 15.3, the voltage for reinforced insulation however, being reduced to
2 500 V.
The test is performed using the apparatus of Annex CC.
Delete the NOTE.
15 Insulation resistance and electric strength
15.3
Replace the first paragraph as follows:
Immediately after the test of 15.2 the insulation is subjected for 1 min to a voltage of
substantially sine-wave form and having a frequency of 50 Hz to 60 Hz. The values of the test
voltage are shown in Table 101.
Add, after the third paragraph, the following:
Weight-engaged connectors are tested when in engagement with a weight-engaged appliance
inlet and also when not in engagement.

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60320-2-4 Amend.1 © IEC:2009 – 7 –


Table 101 Test voltages


Replace the existing Table 101 with the following new Table 101:


Test voltage

V

Class II
Points of application

appliances and Other
class II appliances
constructions



1. Between live parts and accessible parts
separated from live parts by

– basic insulation only
– 1 000
– reinforced insulation
3 000 3 000

2. For parts with double insulation, between metal
parts separated from live parts by basic
insulation only and
– live parts 1 250 1 250
– accessible parts 2 500 2 500
3. Between metal enclosures or covers lined with
insulating material and metal foil in contact with
the inner surface of the lining, if the distance
between live parts and these metal enclosures or 2 500 1 250
covers, measured through the lining, is less than
the appropriate clearance as specified in
Clause 26.

16 Forces necessary to insert and withdraw the connector
16.2
Replace the first paragraph as follows:
The minimum weight for full engagement is determined by mounting a weight-engaged
connector and weight-engaged appliance inlet so that they may engage freely, and that the
axis of engagement is vertical. A force equal to the specified minimum appliance weight, less
the weight of the appliance inlet, is applied vertically downwards to the appliance inlet. The
appliance inlet shall fully enter the connector, in accordance with the manufacturer’s
installation instructions. Any initial resistance caused by sealing shutters and the like may be
overcome manually, but the coupler shall be fully engaged under the specified force alone.

16.3
Replace the last paragraph as follows:
Weight-engaged connectors for which a maximum ambient working temperature is specified in
7.1.4 which is higher than ambient temperature are tested twice, once at an ambient
temperature, and once after the appliance inlet has been raised to the specified maximum
ambient working temperature.
17 Operation of contacts
Replace the first paragraph as follows:
The third paragraph of IEC 60320-1 is replaced as follows:

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– 8 – 60320-2-4 Amend.1 © IEC:2009


Compliance with the requirements is checked by inspection and by the tests of Clauses 16, 18,

19, 20, 21 and 25.101.


Delete the second paragraph.



18 Resistance to heating of appliance couplers for hot conditions or very hot

conditions


Replace the existing paragraph as follows:


This clause of IEC 60320-1 applies, amended as follows:
NOTE Where the appliance coupler is a weight-engaged appliance coupler of a non-standard pattern the test of
18.2 and 18.3 may be combined using the manufacturer’s weight-engaged connector engaged with the
corresponding weight-engaged appliance inlet.
19 Breaking capacity
Replace the third paragraph beginning with “This test is not carried out .” and add the new
NOTE 1 as follows:
This test is not carried out on weight-engaged couplers specifically intended never to be
disengaged while the current is flowing.
NOTE 1 Some lateral movement is allowed to simulate intended use.
Replace the existing note as follows:
NOTE 2 A stroke is a connection or a disconnection of the connector.
Add the following new NOTE 3:
NOTE 3 This test is carried out at ambient temperature.
20 Normal operation
Replace the first paragraph after the instruction “This Clause of IEC 60320-1 is replaced as
follows:” by the following:

Weight-engaged appliance couplers shall withstand, without excessive wear or other harmful
effects, the mechanical, electrical and thermal stresses occurring in normal use.
Add, at the end of this clause and before the existing note, the following new paragraph:
In case of doubt over excessive wear, the Test probe 13 of IEC 61032 is applied without
appreciable force through openings in appliance connectors. It shall not be possible to touch
live parts with the test probe. “Without appreciable force” is considered to be a force not
exceeding 1 N.
Renumber the existing note as NOTE 1 and add the following new NOTE 2:
NOTE 2 Some lateral movement of the mating connector to the appliance inlet under test is allowed to simulate
intended use.

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60320-2-4 Amend.1 © IEC:2009 – 9 –


21 Temperature rise


Replace the sixth paragraph with the following new text:


Alternatively, heating test requirements from the appropriate appliance standard can be used

instead of the test at 1,25 times rated current for 1 h.


Change the existing note to NOTE 1 and add the following new NOTE 2:


NOTE 2 For connectors with an earthing contact, Subclause 25.101 is applicable.


23 Mechanical strength
23.1
Replace the second paragraph as follows:
Compliance is checked on weight-engaged couplers, installed as specified by the
manufacturer, by the test of 23.5.
24 Resistance to heat and ageing
24.1.2
Replace the first paragraph as follows:
Parts of insulating material of weight-engaged appliance inlets and of weight-engaged
connectors shall be sufficiently resistant to heat if their deterioration could cause the
appliance inlet or connector to fail to comply with this standard.
25 Screws, current- carrying parts and connections
At the end of Clause 25, add the following new subclause:
25.101 For couplers with earthing contacts the connection between the earthing terminal or
termination and earthed metal parts shall have low resistance.
If the clearances of basic insulation in a protective extra-low voltage circuit are based on the

rated voltage of the appliance, this requirement does not apply to connections providing
earthing continuity in the protective extra-low voltage circuit.
Compliance is checked by the following test performed in a representative appliance in which
the coupler is intended to be used:
A current derived from a source having a no-load voltage not exceeding 12 V (a.c. or d.c.) and
equal to 1,5 times the rated current of the appliance or 25 A, whichever is higher, is passed
between the earthing terminal or earthing contact of the connector and each of the accessible
metal parts of the representative appliance in turn.
The voltage drop between the earthing terminal or termination of the appliance connector and
the accessible metal part of the representative appliance is measured. The resistance
calculated from the current and this voltage drop shall not exceed 0,1 Ω.
NOTE 1 In case of doubt, the test is carried out until steady conditions have been established.

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– 10 – 60320-2-4 Amend.1 © IEC:2009


NOTE 2 The resistance of the supply cord is not included in the measurement.

NOTE 3 Care is to be taken to ensure that the contact resistance between the tip of the measuring probe and the
metal part under test does not influence the test results.



26 Creepage distances, clearances and distances through insulation


Add the following new text after the first paragraph:


Weight-engaged connectors are tested when in engagement with a weight-engaged appliance

inlet and also when not in engagement.

26.1
Renumber the first note above Table 102 as NOTE 1.

Renumber the existing NOTE 4 as NOTE 2.
26.2
Renumber the existing second NOTE 4 as NOTE 5 and the existing NOTE 5 as NOTE 6.
26.3
At the end of Subclause 26.3, add the following new text:
Solid insulation may have a lower minimum thickness providing accessible parts of solid
insulation shall have sufficient strength to prevent penetration by sharp implements.
Compliance is checked by subjecting the insulation to the following test, unless the thickness
of supplementary insulation is at least 1 mm and that of reinforced insulation is at least 2 mm.
The insulation is raised to the temperature measured during the test of Clause 21. The
surface of the insulation is then scratched by means of a hardened steel pin, the end of which
has the form of a cone with an angle of 40°. Its tip is rounded with a radius of
0,25 mm ± 0,02 mm. The pin is held at an angle of 80° to 85° to the horizontal and loaded so
that the force exerted along its axis is 10 N ± 0,5 N. The scratches are made by drawing the
pin along the surface of the insulation at a speed of approximately 20 mm/s. Two parallel
scratches are made. They are spaced sufficiently apart so that they are not affected by each
other, their length covering approximately 25 % of the length of the insulation. Two similar
scratches are made at 90° to the first pair without crossing them. The test fingernail of

Figure 7 of IEC 60335-1 is then applied to the scratched surface with a force of approximately
10 N. No further damage, such as separation of the material, shall occur. The insulation shall
then withstand the electric strength test of 15.3 . The hardened steel pin is then applied
perpendicularly with a force of 30 N ± 0,5 N to an unscratched part of the surface. The
insulation shall then withstand the electric strength test of 15.3 with the pin still applied and
used as one of the electrodes.

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60320-2-4 Amend.1 © IEC:2009 – 11 –


Add, after Annex BB, the following new Annex CC:

Annex CC

(normative)



Apparatus for the test of Subclause 14.2



Dimensions in millimetres



D

C
A
l = 30
h = 200
E
B
IEC  1337/05

Key
A Funnel tube with inner diameter of 8 mm
B Item under test
C Funnel
D Container with 30 ml of saline solution
E Horizontal surface
NOTE The water from the container D is intended to be poured onto the side of the funnel C to ensure correct
dispersion of the outlet flow.

Figure CC.1 – Apparatus for the test of Subclause 14.2

___________

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– 12 – 60320-2-4 Amend.1 © CEI:2009



AVANT-PROPOS


Le présent amendement a été établi par le sous-comité 23G: Connecteurs, du comité

d'études 23 de la CEI: Petit appareillage.


Le texte de cet amendement est issu des documents suivants:


CDV Rapport de vote

23G/290/CDV 23G/291/RVC


Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à l'approbation de cet amendement.
Le comité a décidé que le contenu de cet amendement et de la publication de base 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.
_____________

1 Domaine d’application
Remplacer la NOTE 2 existante comme suit:
NOTE 2 Les connecteurs à connexion par gravité peuvent être soumis à des débordements de liquide en usage
normal. Ils sont classés selon l'existence d'une protection contre les débordements de liquide lorsqu'ils sont
installés conformément aux instructions d'installation du fabricant.
2 Références normatives
Ajouter les nouvelles références suivantes à la liste:
CEI/TR 60083, Prises de courant pour usages domestiques et analogues normalisées par

les pays membres de la CEI
CEI 60112, Méthode de détermination des indices de résistance et de tenue au
cheminement des matériaux isolants solides
CEI 60730 (toutes les parties), Dispositifs de commande électriques automatiques à usage
domestique et analogue
CEI 61058-1, Interrupteurs pour appareils – Partie 1: Règles générales
Modifier les références suivantes:
CEI 60320-1, Connecteurs pour usages domestiques et usages généraux analogues – Partie 1:
Prescriptions générales

---------------------- Page: 14 ----------------------
60320-2-4 Amend.1 © CEI:2009 – 13 –


CEI 60335-1, Appareils électrodomestiques et analogues – Sécurité – Partie 1: Prescriptions

générales


CEI 60664-1, Coordination de l'isolement des matériels dans les systèmes (réseaux) à basse

tension − Partie 1: Principes, exigences et essais



5 Généralités sur les essais


5.2


Remplacer le troisième alinéa comme suit:
Pour les articles demandant que les essais soient réalisés sur les prises mobiles connectées
par gravité et les socles de connecteur connectés par gravité installés conformément aux
instructions du fabricant, on doit fournir des appareils ou parties d'appareils représentatifs.
5.5
Remplacer le deuxième tiret du deuxième paragraphe comme suit:
− le lot de 2 de trois échantillons est soumis aux essais des Articles 14, 15, 16, 19, 20, 21 et
25.101 (y compris la répétition des essais de l’Article 16).
Remplacer le troisième alinéa comme suit:
Dans le cas de prises mobiles connectées par gravité qui sont déclarées fournir une
protection contre les débordements de liquide, trois échantillons supplémentaires sont
nécessaires, lesquels sont soumis à l'essai de 14.2.
7 Classification
7.1.1
Remplacer le texte existant par le nouveau texte suivant:
Selon l'existence ou non d'une protection contre les débordements de liquide lorsque la prise
mobile est installée selon les instructions du fabricant.

7.1.5
Ajouter le texte suivant à la note:
Un cycle correspond à deux changements de position comme défini à l'Article 19, c'est-à-dire une connexion suivie
d'une déconnexion.
Ajouter les nouveaux Paragraphes 7.1.6 à 7.1.6.7 suivants:
7.1.6 L'information suivante est enregistrée pour couvrir les essais exigés.
7.1.6.1 Selon la section minimale spécifiée du câble souple.
7.1.6.2 Selon l'échauffement des bornes maximal admissible.
7.1.6.3 Selon l'échauffement des sorties maximal admissible.

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– 14 – 60320-2-4 Amend.1 © CEI:2009


7.1.6.4 Selon l'échauffement des contacts maximal admissible.


7.1.6.5 Selon le poids minimal de l'appareil exigé pour un engagement correct.


7.1.6.6 Selon le poids minimal du socle exigé pour un désengagement correct.


7.1.6.7 Selon la température de broche maximale à la base des broches du socle de

connecteur correspondant:


– connecteurs pour conditions froides (température de broche ne dépassant pas

70 °C);

– connecteurs pour conditions chaudes (température de broche ne dépassant
pas 120 °C);
– connecteurs pour conditions très chaudes (température de broche ne
dépassant pas 155 °C).
NOTE Les limites d'échauffement s'appliquent à la fois au socle et à la prise mobile et peuvent être spécifiées
séparément si exigé.
8 Marques et indications
8.101
Remplacer le paragraphe existant comme suit:
Les instructions pour l'installation et l'emploi doivent être fournies avec les connecteurs
connectés par gravité. Ces instructions doivent contenir les informations nécessaires pour
as
...