IEC 60884-1:2022

IEC 60884-1 ®
Edition 4.0 2022-08
INTERNATIONAL
STANDARD
colour
inside
Plugs and socket-outlets for household and similar purposes –
Part 1: General requirements
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IEC 60884-1 ®
Edition 4.0 2022-08
INTERNATIONAL
STANDARD
colour
inside
Plugs and socket-outlets for household and similar purposes –

Part 1: General requirements
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.30 ISBN 978-2-8322-3990-2

– 2 – IEC 60884-1:2022 © IEC 2022
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 10
4 General requirements . 18
5 General remarks on tests . 18
6 Ratings . 20
7 Classification . 21
8 Marking . 23
9 Checking of dimensions . 27
10 Protection against electric shock . 29
11 Provision for earthing . 35
12 Terminals and terminations . 37
13 Construction of fixed socket-outlets . 57
14 Construction of plugs and portable socket-outlets . 68
15 Interlocked socket-outlets . 76
16 Resistance to ageing, protection provided by enclosures, and resistance to
humidity . 77
17 Insulation resistance and electric strength . 84
18 Operation of earthing contacts . 85
19 Temperature rise . 85
20 Breaking capacity . 94
21 Normal operation . 98
22 Force necessary to withdraw the plug . 102
23 Flexible cables and their connection . 107
24 Mechanical strength . 114
25 Resistance to heat . 133
26 Screws, current-carrying parts and connections . 136
27 Creepage distances, clearances and distances through sealing compound . 138
28 Resistance of insulating material to abnormal heat, to fire and to tracking . 140
29 Resistance to rusting . 145
30 Additional tests on pins provided with insulating sleeves . 145
31 EMC requirements . 147
32 Electromagnetic fields (EMF) requirements . 148
Annex A (normative) Safety-related routine tests for factory-wired portable
accessories (protection against electric shock and correct polarity) . 149
Annex B (informative) Alternative gripping tests . 151
Annex C (normative) Switches incorporated in portable socket-outlets . 154
Annex D (normative) Requirements for plugs and fixed or portable socket-outlets
intended to be used with AWG cables . 155
Annex E (informative) Tests to be applied during the production of crimped
connections in accessories . 168

Annex F (normative) Additional requirements for accessories provided with insulation-
piercing terminals . 170
Annex G (informative) Additional tests and requirements for accessories intended to

be used in ambient temperatures below −5 °C down to and including −45 °C . 180
Annex H (informative) Additional tests and requirements for accessories intended to
be used in ambient temperatures above +40 °C up to and including +70 °C . 185
Annex I (normative) Additional requirements and tests for plugs and socket-outlets for
high-load (HL) application . 188
Bibliography . 195

Figure 1 – Examples of accessories . 11
Figure 2 – Example of thread-forming screw . 14
Figure 3 – Example of thread-cutting screw . 14
Figure 4 – Examples of membranes and grommets . 16
Figure 5 – Test piston dimensions. 27
Figure 6 – Arrangement for compression test . 30
Figure 7 – Gauge for checking non-accessibility of live parts, through shutters . 33
Figure 8 – Gauge for checking non-accessibility of live parts, through shutters, and of
live parts of socket-outlets with increased protection. 34
Figure 9 – Pillar terminals . 40
Figure 10 – Screw head terminals and stud terminals . 42
Figure 11 – Saddle terminals . 42
Figure 12 – Mantle terminals . 43
Figure 13 – Arrangement for checking damage to conductors . 44
Figure 14 – Information for deflection test . 55
Figure 15 – Verification of the requirements of 13.4 . 61
Figure 16 – Device for checking the resistance to lateral strain . 65
Figure 17 – Device for testing pins which are not solid . 69
Figure 18 – Types of test wall . 81
Figure 19 – Test set-up in accordance with 16.2.3 . 82
Figure 20 – Clamping unit for the temperature rise test of Clause 19 . 89
Figure 21 – Example of a trend line calculation . 94
Figure 22 – Example of apparatus for breaking capacity and normal operation test . 96
Figure 23 – Circuit diagrams for breaking capacity and normal operation tests . 97
Figure 24 – Test procedures for normal operation for socket-outlets with shutters (see
Clause 21) . 101
Figure 25 – Apparatus for verification of maximum withdrawal force . 104
Figure 26 – Gauge for the verification of minimum withdrawal force . 105
Figure 27 – Apparatus for testing cord retention. 108
Figure 28 – Apparatus for flexing test . 113
Figure 29 – Sketches showing the application of the blows according to Table 23. 118
Figure 30 – Apparatus for impact test at low temperature of 24.5 . 121
Figure 31 – Apparatus for abrasion test on insulating sleeves of plug pins . 122
Figure 32 – Arrangement for mechanical strength test on multiple portable socket-
outlets . 124

– 4 – IEC 60884-1:2022 © IEC 2022
Figure 33 – Example of test arrangement to verify the retention of pins in the body of
the plug . 125
Figure 34 – Arrangement for test on covers or cover-plates . 128
Figure 35 – Gauge (thickness about 2 mm) for the verification of the outline of covers
or cover-plates . 129
Figure 36 – Examples of application of the gauge of Figure 35 on covers fixed without
screws on a mounting surface or supporting surface . 130
Figure 37 – Examples of application of the gauge of Figure 35 in accordance with the
requirements of 24.16 . 131
Figure 38 – Gauge for verification of grooves, holes and reverse tapers . 132
Figure 39 – Sketch showing the direction of application of the gauge of Figure 38 . 132
Figure 40 – Ball pressure test apparatus . 134
Figure 41 – Apparatus for compression test for the verification of resistance to

heat specification of 25.5 . 135
Figure 42 – Diagrammatic representation of 28.1.2 . 142
Figure 43 – Apparatus for testing resistance to abnormal heat of insulating sleeves of
plug pins . 144
Figure 44 – Apparatus for pressure test at high temperature . 146
Figure 45 – Impact test apparatus on pins provided with insulating sleeves . 147
Figure B.1 – Reference plug for gripping test . 152
Figure B.2 – Example of the test apparatus for plug gripping test . 153
Figure F.1 – Example of IPTs . 178
Figure F.2 – Example of test-points . 178
Figure F.3 – Temperature cycle for voltage drop test 12.4.11 . 179
Figure H.1 – Schematic drawing of a de-rating curve with an example of a de-rated
current I at the operating ambient temperature t . 186
d d
Table 1 – Survey of specimens needed for tests . 19
Table 2 – Preferred combinations of types and ratings . 21
Table 3 – Gauge tolerances . 28
Table 4 – Relationship between rated current and connectable nominal cross-sectional

areas of copper conductors . 38
Table 5 – Values for pull test for screw-type terminals . 45
Table 6 – Composition of conductors . 46
Table 7 – Tightening torques for the verification of the mechanical strength of screw-
type terminals . 48
Table 8 – Relationship between rated current and connectable cross-sectional areas of
copper conductors for screwless-type terminals . 49
Table 9 – Value for pull test for screwless-type-type terminals . 51
Table 10 – Values for flexing under mechanical load test for copper conductors . 52
Table 11 – Test current for the verification of electrical and thermal stresses in normal

use for screwless-type terminals . 52
Table 12 – Nominal cross-sectional areas of rigid copper conductors for deflection test
of screwless-type terminals . 55
Table 13 – Deflection test forces for screwless-type terminals . 56
Table 14 – Forces to be applied to covers, cover-plates or actuating members whose
fixing is not dependent on screws . 63

Table 15 – External cable dimension limits for surface-type socket-outlets . 67
Table 16 – Nominal cross-sectional areas of copper conductors for the temperature-
rise test . 86
Table 17 – Test current for cycling tests on accessories with crimped connection . 93
Table 18 – Relationship between rating of accessories, nominal cross-sectional areas
of test conductors and test currents for the tests of temperature rise (Clause 19) and
normal operation (Clause 21) . 99
Table 19 – Maximum and minimum withdrawal force for plugs and socket-outlets . 106
Table 20 – External dimensions of flexible cables to be accommodated by cord
anchorages . 109
Table 21 – Torque test values for cord anchorages . 110
Table 22 – Maximum dimensions of flexible cables to be accommodated in rewirable
accessories . 111
Table 23 – Height of fall for impact tests . 116
Table 24 – Torque test values for cable glands . 122
Table 25 – Resistance to heat of different types or parts of accessories . 133
Table 26 – Creepage distances, clearances and distances through insulating sealing
compound . 139
Table A.1 – Diagrammatic representation of routine tests to be applied to factory-wired
portable accessories . 150
Table F.1 – Relationship between rated currents and connectable cross-sectional

areas of copper conductors for IPTs . 173
Table F.2 – Test current for the verification of electrical and thermal stresses in normal
use of IPTs . 177
Table G.1 – Energy for impact tests . 183
Table I.1 – Test current for cycling tests on plugs . 192

– 6 – IEC 60884-1:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PLUGS AND SOCKET-OUTLETS FOR
HOUSEHOLD AND SIMILAR PURPOSES –

Part 1: General requirements
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
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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.
IEC 60884-1 has been prepared by subcommittee 23B: Plugs, socket-outlets and switches, of
IEC technical committee 23: Electrical accessories. It is an International Standard.
This fourth edition cancels and replaces the third edition published in 2002, Amendment 1:2006
and Amendment 2:2013. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) plugs and socket-outlets incorporating pilot lights;
b) crimped connections in accessories;
c) insulation piercing terminals (IPT);
d) accessories to be used with American Wire Gauge (AWG) cables;
e) accessories used in T° below −5 °C down to and including −45 °C;
f) accessories used in T° above +40 °C up to and including +70 °C;

g) plugs and socket-outlets for high load (HL);
h) clarification of some definitions;
i) durability of markings test;
j) introduction of thermal monitoring in the plug;
k) requirements for shutters in portable socket-outlets;
l) test walls for the verification of ingress of water;
m) rewriting of the temperature rise clause.
The text of this International Standard is based on the following documents:
Draft Report on voting
23B/1386/FDIS 23B/1400/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 60884 series, published under the general title Plugs and
socket-outlets for household and similar purposes, can be found on the IEC website.
The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
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.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

– 8 – IEC 60884-1:2022 © IEC 2022
PLUGS AND SOCKET-OUTLETS FOR
HOUSEHOLD AND SIMILAR PURPOSES –

Part 1: General requirements
1 Scope
This part of IEC 60884 applies to plugs and fixed or portable socket-outlets for AC only, with or
without earthing contact, with a rated voltage greater than 50 V but not exceeding 440 V and a
rated current not exceeding 32 A, intended for household and similar purposes, either indoors
or outdoors.
Compatible plugs and socket-outlets, when combined, form a plug and socket-outlet system.
Standardized systems used around the world are reported in IEC/TR 60083.
The rated current is limited to 16 A maximum for accessories provided with screwless-type
terminals.
This document covers only those requirements for mounting boxes which are necessary for the
tests on the socket-outlet.
NOTE 1 Requirements for general purpose mounting boxes are given in IEC 60670-1.
This document also applies to:
– plugs which are a part of cord sets;
– plugs and portable socket-outlets which are a part of cord extension sets;
– plugs and socket-outlets which are a component of an appliance, unless otherwise stated
in the standard for the relevant appliance; and
– plugs and socket-outlets incorporating pilot lights.
This document does not apply to:
– plugs, socket-outlets and couplers for industrial purposes;
– appliance couplers;
– plugs, fixed and portable socket-outlets for extra low voltage (ELV);
NOTE 2 ELV values are specified in IEC 60364-4-41.
– fixed socket-outlets combined with fuses, automatic switches, etc.
Plugs of this document are intended to be energised by socket-outlets.
NOTE 3 Use in any other manner could result in unsafe conditions within the installation if proper precautions are
not taken. When energy producing equipment is connected to the fixed installation via plugs of this document all
safety aspects of the products and the installation need to be evaluated by the manufacturer of the energy producing
equipment.
Plugs and socket-outlets complying with this document are suitable for use at ambient
temperatures not normally exceeding +40 °C, but their average temperature over a period of
24 h does not exceed +35 °C, with a lower limit of the ambient air temperature of −5 °C.
In locations where special conditions prevail, such as in ships, vehicles and the like and in
hazardous locations, for example where explosions are liable to occur, additional requirements
can be applicable.
This document gives additional requirements for accessories intended to be used with AWG
cables, see Annex D (normative).
This document gives additional tests to be applied during the production of crimped connections
in accessories, see Annex E (informative).
This document gives additional requirements for accessories provided with insulation-piercing
terminals, see Annex F (normative).
This document gives additional specifications for accessories intended to be used in ambient
temperatures below −5 °C down to and including −45 °C, see Annex G (informative).
This document gives additional specifications for accessories intended to be used in ambient
temperatures above +40 °C up to and including +70 °C, see Annex H (informative).
This document gives additional requirements for plugs and socket-outlets for high load (HL).
These plugs and socket-outlets are typically intended to be used for loads applying long and
repetitive cycles up to the rated current of the accessories, see Annex I (normative).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60068-2-30, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12 + 12 h cycle)
IEC 60068-2-31, Environmental testing – Part 2-31: Tests – Test Ec: Rough handling shocks,
primarily for equipment-type specimens
IEC 60068-2-75, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60112, Method for the determination of the proof and the comparative tracking indices of
solid insulating materials
IEC 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V
IEC 60245 (all parts), Rubber insulated cables – Rated voltages up to and including 450/750 V
IEC 60417, Graphical symbols for use on equipment (available at http://www.graphical-
symbols.info/equipment)
IEC 60423:2007, Conduit systems for cable management – Outside diameters of conduits for
electrical installations and threads for conduits and fittings
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60529:1989/AMD1:1999
IEC 60529:1989/AMD2:2013
IEC 60669 (all parts), Switches for household and similar fixed-electrical installations
IEC 60669-2-1:2021, Switches for household and similar fixed electrical installations – Part 2-1:
Particular requirements – Electronic control devices

– 10 – IEC 60884-1:2022 © IEC 2022
IEC 60695-2-10:2021, Fire hazard testing – Part 2-10: Glowing/hot-wire based test methods –
Glow-wire apparatus and common test procedure
IEC 60695-2-11:2021, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end products (GWEPT)
IEC 60884-2-1, Plugs and socket-outlets for household and similar purposes – Part 2-1:
Particular requirements for fused plugs
IEC 61032:1997, Protection of persons and equipment by enclosures – Probes for verification
IEC 61058 (all parts), Switches for appliances
IEC 61545, Connecting devices – Devices for the connection of aluminium conductors in
clamping units of any material and copper conductors in aluminium bodied clamping units
ISO/IEC Guide 51, Safety aspects – Guidelines for their inclusion in standards
ISO 1456:2009, Metallic and other inorganic coatings – Electrodeposited coatings of nickel,
nickel plus chromium, copper plus nickel and of copper plus nickel plus chromium
ISO 2081:2018, Metallic and other inorganic coatings – Electroplated coatings of zinc with
supplementary treatments on iron or steel
ISO 2093:1986, Electroplated coatings of tin – Specification and test methods
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
NOTE 1 Where the terms "voltage" and "current" are used, they imply RMS values, unless otherwise specified.
NOTE 2 Throughout this document the word "earthing" is used for "protective earthing" unless otherwise stated.
NOTE 3 The term "accessory" is used as a general term covering plugs and socket-outlets; the term "portable
accessory" covers plugs and portable socket-outlets. Examples of the use of accessories are shown in Figure 1 a).
NOTE 4 Throughout this document the term "socket-outlet" covers both fixed and portable socket-outlets, except
where the reference is specific to one type or the other.

a) Diagram showing various accessories and their use
NOTE Appliance, appliance inlet and appliance coupler are used in this figure only for illustration purposes and
they are not covered by this document.

b) Example of a multiple socket-outlet
Figure 1 – Examples of accessories
3.1
plug
accessory having pins designed to engage with the contacts of a socket-outlet
Note 1 to entry: A plug allows the manual connection and disconnection of an electrical load to an electrical supply
by an ordinary person.
Note 2 to entry: The plug can be connected to a cable or integrated into an accessory.
Note 3 to entry: In adaptors, the plug can be integral or detachable, see IEC 60884-2-5.
Note 4 to entry: For special purposes such as lighting chains (see also IEC 60598-2-20), two or three single-core
cables can be connected within the plug.
3.2
socket-outlet
accessory having socket-contacts designed to engage with the pins of a plug
Note 1 to entry: The socket-outlet can be connected to a cable or integrated into an accessory.
Note 2 to entry: In adaptors, the socket-outlet can be integral or detachable, see IEC 60884-2-5.
3.3
fixed socket-outlet
socket-outlet intended to be installed at a fixed location and be connected to fixed wiring

– 12 – IEC 60884-1:2022 © IEC 2022
3.4
portable socket-outlet
socket-outlet intended to be connected to or integral with one flexible cable and which can
easily be moved from one place to another while connected to the supply
3.5
multiple socket-outlets
combination of two or more socket-outlets
Note 1 to entry: An example is shown in Figure 1 b).
3.6
rewirable plug
plug so constructed that the flexible cable can be replaced
3.7
non-rewirable plug
assembly of the plug and the flexible cable so constructed that the flexible cable cannot be
replaced
3.8
rewirable portable socket-outlet
socket-outlet so constructed that the flexible cable can be replaced
3.9
non-rewirable portable socket-outlet
assembly of the socket-outlet and the flexible cable so constructed that the flexible cable cannot
be replaced
3.10
moulded-on accessory
non-rewirable portable accessory the manufacture of which is completed by insulating material
moulded around pre-assembled component parts and the terminations for the flexible cable
[SOURCE: IEC 60050-442:1998, 442-01-14, modified – "portable" has been added to the
definition and "or cord" has been omitted.]
3.11
mounting box
box intended for mounting in or on a wall, floor or ceiling, etc., for flush or surface application,
intended for use with fixed socket-outlet(s)
3.12
cord set
assembly consisting of a flexible cable or cord fitted with a non-rewirable plug and a non-
rewirable connector, intended for the connection of an electrical appliance to the electrical
supply
[SOURCE: IEC 60050-442:1998, 442-07-04, and IEC 60050-442:2008, 461-06-16]
3.13
cord extension set
assembly consisting of one flexible cable fitted with one plug and one single or multiple portable
socket-outlets
3.14
terminal
insulated or non-insulated connecting device intended for reusable electrical connection of the
external conductors
3.15
termination
insulated or non-insulated connecting device intended for non-reusable electrical connection of
the external conductors
3.16
clamping unit
part(s) of the terminal necessary for the mechanical clamping and the electrical connection of
the conductor(s), including the parts which are necessary to ensure correct contact pressure
[SOURCE: IEC 60050-442:1998, 442-06-12]
3.17
screw-type terminal
terminal for the connection and subsequent disconnection of one conductor or the
interconnection and subsequent disconnection of two or more conductors, the connection being
made, directly or indirectly, by means of screws or nuts of any kind
Note 1 to entry: Term entries 3.18 to 3.23 are examples of screw-type terminals.
3.18
pillar terminal
screw-type terminal in which the conductor is inserted into a hole or cavity, where it is clamped
under the end of the screw or screws
Note 1 to entry: The clamping pressure may be applied directly by the end of the screw or through an intermediate
clamping member to which pressure is applied by the end of the screw.
Note 2 to entry: Examples of pillar terminals are shown in Figure 9.
3.19
stirrup terminal
pillar terminal where the clamping pressure may be applied indirectly by an intermediate
clamping member when the screw is tightened
Note 1 to entry: Examples of stirrup terminals are shown in Figure 9.
3.20
screw head terminal
screw-type terminal in which the conductor is clamped under the head of the screw
Note 1 to entry: The clamping pressure may be applied directly to the head of a screw or through an intermediate
part, such as a washer, clamping plate or anti-spread device.
Note 2 to entry: Examples of screw head terminals are shown in Figure 10.
3.21
stud terminal
screw-type terminal in which the conductor is clamped under a nut
Note 1 to entry: The clamping pressure may be applied directly by a suitably shaped nut or through an intermediate
part, such as a washer, clamping plate or anti-spread device.
Note 2 to entry: Examples of stud terminals are shown in Figure 10.

– 14 – IEC 60884-1:2022 © IEC 2022
3.22
saddle terminal
screw-type terminal in which the conductor is clamped under a saddle by means of two or more
screws or nuts
Note 1 to entry: Examples of saddle terminals are shown in Figure 11.
3.23
mantle terminal
screw-type terminal in which the conductor is clamped against the base of a slot in a threaded
stud by means of a nut
Note 1 to entry: The conductor is clamped against the base of the slot by a suitably shaped washer under the nut,
by a central peg if the nut is a cap nut, or by equally effective means for transmitting the pressure from the nut to the
conductor within the slot.
Note 2 to entry: Examples of mantle terminals are shown in Figure 12.
3.24
screwless-type terminal
connecting device for the connection and subsequent disconnection of a rigid (solid or stranded)
or flexible conductor or the interconnection of two or more conductors, capable of being
dismantled, the connection being made, directly or indirectly, by means of springs, parts of
angled, eccentric or conical form, etc., without special preparation of the conductor concerned,
other than removal of insulation
3.25
thread-forming screw
screw having an uninterrupted thread, which by screwing in, forms a thread by displacing
material
Note 1 to entry: An example of a thread-forming screw is shown in Figure 2.

Figure 2 – Example of thread-forming screw
3.26
thread-cutting screw
screw having an interrupted thread, which by screwing in, forms a thread by removing material
Note 1 to entry: An example of a thread-cutting screw is shown in Figure 3.

Figure 3 – Example of thread-cutting screw
3.27
rated voltage
voltage assigned by the manufacturer for a specified operating condition of an accessory
[SOURCE: IEC 60050-442:1998, 442-01-03, modified – The domain "(for accessories)" has
been omitted.]
3.28
rated current
current assigned by the manufacturer for specified operating condition of an accessory
Note 1 to entry: Examples of the operating conditions are ambient condition, characteristics of the power supply,
duty cycle or duty type.
[SOURCE: IEC 60050-442:1998, 442-01-02, modified – The domain "(for accessories)" has
been omitted and the note to entry added.]
3.29
shutter
movable part incorporated into a socket-outlet arranged to shield at least the live
socket-contacts automatically when the plug is withdrawn
3.30
type test
test of one or more devices made to a certain design to show that the design meets certain
specifications
3.31
routine test
test to which each individual device is subjected during and/or after manufacture to ascertain
whether it complies with certain criteria
3.32
base
part of the socket-outlet supporting the socket-contacts
3.33
live part
conductor or conductive part intended to be energized in normal use, including a neutral
conductor, but by convention not a PEN conductor
Note 1 to entry: Live parts according to this document are always considered as hazardous with the exception of
SELV circuits.
[SOURCE: IEC 60050-826:2004, 826-12-08, modified – "operation" has been replaced with
"use"; "or PEM conductor or PEL conductor" and the note to entry omitted.]
3.34
cable anchorage
part of an accessory which has the ability to limit the displacement of a fitted flexible cable
against pull, push and turning forces
3.35
main part
assembly consisting of the base and other parts
Note 1 to entry: This assembly is not intended to be dismantled at any time after manufacture.
3.36
grommet
component used to support and protect the cable or conduit at the point of entry
Note 1 to entry: A grommet may als
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