IEC 60320-2-1:2018

IEC 60320-2-1 ®
Edition 3.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Appliance couplers for household and similar general purposes –
Part 2-1: Sewing machine couplers

Connecteurs pour usages domestiques et usages généraux analogues –
Partie 2-1: Connecteurs pour machines à coudre

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IEC 60320-2-1 ®
Edition 3.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Appliance couplers for household and similar general purposes –

Part 2-1: Sewing machine couplers

Connecteurs pour usages domestiques et usages généraux analogues –

Partie 2-1: Connecteurs pour machines à coudre

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.30 ISBN 978-2-8322-5446-2

– 2 – IEC 60320-2-1:2018 © IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements . 6
5 General notes on tests . 6
6 Standard ratings . 6
7 Classification of appliance couplers . 7
8 Marking . 7
9 Dimensions and compatibility . 7
10 Protection against electric shock . 8
11 Provision for earthing . 8
12 Terminals and terminations . 8
13 Construction . 8
14 Moisture resistance . 8
15 Insulation resistance and electric strength . 8
16 Forces necessary to insert and to withdraw the connector/appliance outlet . 9
17 Operation of contacts . 9
18 Resistance to heating of appliance couplers for hot conditions or very hot
conditions . 9
19 Breaking capacity . 9
20 Normal operation . 9
21 Temperature rise . 9
22 Cords and their connection . 9
23 Mechanical strength . 10
24 Resistance to heat and ageing. 10
25 Screws, current-carrying parts and connections . 10
26 Clearances, creepage distances and solid insulation . 10
27 Resistance of insulating material to heat, fire and tracking . 10
28 Resistance to rusting . 11
29 Electromagnetic compatibility (EMC) requirements . 11
Annex A (normative) Proof tracking test . 12
Annex B (normative) Routine tests for factory wired appliance couplers related to
safety. 13
Annex C (normative) Test schedule . 14
Annex D (informative) Comparison of typical conductor cross-sectional areas . 15
Bilbliography . 16

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
APPLIANCE COUPLERS FOR HOUSEHOLD
AND SIMILAR GENERAL PURPOSES –

Part 2-1: Sewing machine couplers

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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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 60320-2-1 has been prepared by subcommittee 23G: Appliance
couplers, of IEC technical committee 23: Electrical accessories.
This third edition cancels and replaces the second edition published in 2000. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Aligned with IEC 60320-1:2015.

– 4 – IEC 60320-2-1:2018 © IEC 2018
The text of this International Standard is based on the following documents:
FDIS Report on voting
23G/394/FDIS 23G/398/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
This Part 2-1 is to be used in conjunction with IEC 60320-1: Appliance couplers for household
and similar general purposes – Part 1: General requirements. It was established on the basis
of the third edition of that standard (2015).
The clauses of this standard supplement or modify the corresponding clauses of IEC 60320-1.
When a particular subclause or annex of Part 1 is not mentioned in this Part 2-1, the
subclause or annex of IEC 60320-1 applies without modification as far as is reasonable.
Where this standard states "addition", "modification" or "replacement", the relevant
requirement, test specification or explanatory matter in IEC 60320-1 should be adapted
accordingly.
Subclauses which are additional to those in Part 1 are numbered starting from 101.
In this particular standard the following print types are used:
• requirements: in roman type;
• test specifications: in italic type;
• explanatory matter: in smaller roman type.
A list of all parts in the IEC 60320 series, published under the general title, Appliance
couplers for household and similar general purposes, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
Where in IEC 60320-1 the words "appliance coupler", "connector" or "appliance inlet" appear,
they should be deleted and replaced by "sewing machine coupler", "sewing machine
connector" or "sewing machine inlet", respectively.

– 6 – IEC 60320-2-1:2018 © IEC 2018
APPLIANCE COUPLERS FOR HOUSEHOLD
AND SIMILAR GENERAL PURPOSES –

Part 2-1: Sewing machine couplers

1 Scope
This clause of IEC 60320-1 is replaced as follows:
This part of IEC 60320 is applicable to special purpose appliance couplers for household
sewing machines. These sewing machine couplers are for alternating current only and have a
rated voltage not exceeding 250 V and a rated current not exceeding 2,5 A.
The sewing machine couplers can include two or more contacts depending on the control
components or circuitry required to operate the sewing machine and can be with or without
earthing contact.
2 Normative references
This clause of IEC 60320-1 applies with the following addition:
IEC 60320-1, Appliance couplers for household and similar general purposes – Part 1:
General requirements
3 Terms and definitions
This clause of IEC 60320-1 applies with the following addition:
3.101
sewing machine coupler
appliance coupler used exclusively on sewing machines
Note 1 to entry:
It consists of two parts:
– the sewing machine connector, which is the part integral with, or intended to be attached to, the cord or cords;
– the sewing machine inlet, which is the part integrated in or incorporated in the sewing machine or its control or
intended to be fixed to it.
4 General requirements
This clause of IEC 60320-1 applies.
5 General notes on tests
This clause of IEC 60320-1 applies.
6 Standard ratings
This clause of IEC 60320-1 applies amended as follows:

6.2 Replacement:
The rated current of sewing machine couplers shall be not higher than 2,5 A.
7 Classification of appliance couplers
This clause of IEC 60320-1 applies amended as follows:
7.1 Replacement:
Sewing machine couplers are for cold conditions only (maximum pin temperature of the
sewing machine inlet not exceeding 70 °C).
7.2 Replacement:
Sewing machine couplers are classified according to the type of sewing machine to be
connected:
– sewing machine couplers for class I sewing machines;
– sewing machine couplers for class II sewing machines.
8 Marking
This clause of IEC 60320-1 applies.
9 Dimensions and compatibility
This clause of IEC 60320-1 applies amended as follows:
9.3 Addition:
For sewing machine couplers no standard sheets have been included, but the following
dimensional requirements apply.
In sewing machine connectors, the socket contacts shall be recessed so as to comply with the
distances specified in Clause 26. This dimension shall be equal, if possible, to the dimension
specified on the standard sheet in IEC 60320-3 for a similar connector.
A sewing machine connector with entry holes having a diameter or a width not exceeding
3 mm and recessed not less than 3 mm, as measured from the engagement face, is
considered to be acceptable, if these dimensions are similar to those given in Standard
Sheets C1, C5 and C7 of IEC 60320-3.
The internal length of the socket contact shall be such that the contact overlap between the
socket contact and the corresponding pin of the sewing machine inlets is not less than 4 mm.
Additional subclause (following 9.5):
9.101 Interchangeability
Sewing machine couplers shall not be interchangeable with connectors or appliance inlets
complying with the standard sheets in IEC 60320-3.

– 8 – IEC 60320-2-1:2018 © IEC 2018
10 Protection against electric shock
This clause of IEC 60320-1 applies.
11 Provision for earthing
This clause of IEC 60320-1 applies.
12 Terminals and terminations
This clause of IEC 60320-1 applies amended as follows:
12.2 Addition:
Rewirable sewing machine connectors shall have terminals with a rated connecting capacity
of 1 mm for flexible conductors.
Additional subclause (following 12.2):
12.101 The terminal(s) in rewirable sewing machine connectors to which more than one
conductor shall be connected, shall be checked with the number of conductors to be
connected.
13 Construction
This clause of IEC 60320-1 applies with the following additions:
Additional subclauses (following 13.1):
13.101 Location of contacts
Sewing machine connectors shall not have contacts which are recessed in grooves or the like.
NOTE This requirement applies in all cases, even if the contacts are not accessible with the standard test finger.
Compliance is checked by inspection.
13.102 Connectors with additional SELV contacts
Sewing machine connectors containing contacts both for the supply voltage and for SELV
shall be non-rewirable.
Compliance is checked by inspection.
14 Moisture resistance
This clause of IEC 60320-1 applies.
15 Insulation resistance and electric strength
This clause of IEC 60320-1 applies.

16 Forces necessary to insert and to withdraw the connector/appliance outlet
This clause of IEC 60320-1 applies.
17 Operation of contacts
This clause of IEC 60320-1 applies.
18 Resistance to heating of appliance couplers for hot conditions
or very hot conditions
This clause of IEC 60320-1 does not apply.
19 Breaking capacity
This clause of IEC 60320-1 applies.
20 Normal operation
This clause of IEC 60320-1 applies.
21 Temperature rise
This clause of IEC 60320-1 applies.
22 Cords and their connection
This clause of IEC 60320-1 applies amended as follows:
22.1 Table 9 is replaced by the following table:
a
Type of connector Type of cord Nominal cross – sectional area
mm
Sewing machine connector 60227 IEC 52 0,75
60245 IEC 53 0,75
NOTE Cords with cross-sectional area of 0,5 mm can be used for cord lengths not exceeding 2 m according to
IEC 60335-1 and IEC 60335-2-28.
a
Other cable or cord with equivalent properties may also be used.

22.2.3 Addition to the test specifications:
If a sewing machine connector is provided with, or is intended to be fitted with, more than one
cord, the test shall be made as follows:
– non-rewirable sewing machine connectors shall be tested with the cords as delivered;
– rewirable sewing machine connectors shall be tested using the sizes and types of cords
recommended by the manufacturer;
– the sewing machine connector shall be tested with each cord separately, any other cord
being cut back to a length of approximately 100 mm.

– 10 – IEC 60320-2-1:2018 © IEC 2018
22.3 Addition to the test specifications:
If a sewing machine connector is provided with, or is intended to be fitted with, more than one
cord, the test shall be made as follows:
– non-rewirable sewing machine connectors shall be tested with the cords as delivered;
– rewirable sewing machine connectors shall be tested using the sizes and types of cords
recommended by the manufacturer;
– the sewing machine connector shall be tested with each cord separately, any other cord
being cut back to a length of approximately 100 mm.
NOTE For this test, one additional set of samples per extra cord is needed.
23 Mechanical strength
This clause of IEC 60320-1 applies amended as follows:
23.2 Addition to the test specification:
If a sewing machine connector is provided with, or is intended to be fitted with, more than one
cord, the test shall be made as follows:
– non-rewirable sewing machine connectors shall be tested with the cords as delivered;
– rewirable sewing machine connectors shall be tested using the sizes and types of cords
recommended by the manufacturer;
– all cords shall have a length of ap
...