prEN IEC 63418:2025

SLOVENSKI STANDARD
01-julij-2025
Fiksni dodatki, namenjeni za gospodinjsko in podobno uporabo, ki se napajajo
prek vmesnika
Fixed accessories intended for household and similar purposes that supply power
through an interface
Appareils fixes prévus pour des usages domestiques et analogues qui assurent
l'alimentation électrique par l'intermédiaire d'une interface
Ta slovenski standard je istoveten z: prEN IEC 63418:2025
ICS:
29.120.30 Vtiči, vtičnice, spojke Plugs, socket-outlets,
couplers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

23B/1572/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 63418 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-05-30 2025-08-22
SUPERSEDES DOCUMENTS:
23B/1502/CD, 23B/1511A/CC
IEC SC 23B : PLUGS, SOCKET-OUTLETS AND SWITCHES
SECRETARIAT: SECRETARY:
Italy Mr Cristiano Masini
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
Electromagnetic Compatibility,Safety
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Fixed accessories intended for household and similar purposes that supply power through an
interface
PROPOSED STABILITY DATE: 2030
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2 IEC CDV 63418 ED1 © IEC 2025

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IEC CDV 63418 ED1 © IEC 2025 3
CONTENTS
FOREWORD . 9
1 Scope . 11
2 Normative references . 11
3 Terms and definitions . 14
4 General requirements . 19
5 General remarks on tests . 19
5.1 General . 19
5.2 Products arrangement during test . 20
5.3 Ambient test condition. 20
5.4 Additional samples . 20
5.5 Routine tests . 20
6 Ratings . 20
6.1 Rated input voltage . 20
6.2 USB output ratings . 20
7 Classification . 20
7.1 Accessories classification . 20
7.1.1 20
7.1.2 21
7.1.3 21
7.1.4 21
7.1.5 21
7.1.6 21
7.1.7 22
7.1.8 22
7.1.9 22
7.1.10 22
7.1.11 22
8 Marking . 23
8.1 General . 23
8.2 Symbols . 23
8.3 Visibility of markings . 24
8.4 Particular requirements for markings on terminals other than phase
terminals . 25
8.5 IP code marking for surface-type mounting boxes forming an integral part of
accessories. 25
8.6 Additional requirement for marking. 25
8.7 Particular requirements for connecting devices of connecting leads . 26
8.8 Durability . 26
9 Checking of dimensions . 27
9.1 General . 27
10 Protection against electric shock . 27
10.1 General . 27
10.2 Accessibility of hazardous live part during normal use . 27
10.3 Requirements for accessible parts of accessory during normal use . 27

4 IEC CDV 63418 ED1 © IEC 2025
10.3.1 27
10.3.2 28
10.4 Metal parts of the USB ports . 28
10.5 Output voltage protective measure . 28
10.6 Ventilation openings . 28
11 Provision for earthing . 28
11.1 Accessories provided with earthing terminals . 28
11.2 Accessible metal parts . 29
11.3 Connection with the earthing terminal . 29
12 Terminals . 29
12.1 General . 29
12.2 Terminals with screw clamping for external copper conductors . 30
12.2.1 30
12.2.2 33
12.2.3 33
12.2.4 33
12.2.5 33
12.2.6 35
12.2.7 35
12.2.8 36
12.2.9 37
12.2.10 37
12.2.11 38
12.3 Screwless-type terminals for external copper conductors . 38
12.3.1 38
12.3.2 38
12.3.3 38
12.3.4 38
12.3.5 38
12.3.6 39
12.3.7 39
12.3.8 39
12.3.9 39
12.3.10 39
12.3.11 40
12.3.12 41
12.4 Insulation piercing terminals (IPT) . 44
13 Construction of accessories . 44
13.1 Insulating linings, barriers and the like . 44
13.2 Connection of conductors . 44
13.3 Protection against electric shock provided by covers, cover-plates . 46
13.3.1 46
13.3.2 47
13.3.3 47
13.3.4 48
13.4 Openings in normal use . 48
13.5 Means for mounting the accessory . 48
13.6 Mounting plate of surface-type accessories . 48
13.7 Surface-type accessories having an IP code higher than IP20 . 48

IEC CDV 63418 ED1 © IEC 2025 5
13.8 Metal strips of the earthing circuit . 49
13.9 Installation in boxes . 49
13.10 Inlet openings . 49
13.11 Fixing of membranes (grommets) . 49
13.12 Material for membranes . 50
13.13 Conductors used in accessories . 50
13.14 Switches used in accessories . 51
13.15 Capacitors bridging insulation between primary and secondary circuits of the
accessory . 51
13.16 Applicable clauses of IEC 62368-1:2023 . 52
13.17 Applicable clauses of IEC 62368-3:2017 . 52
14 Resistance to ageing, protection provided by enclosures, and resistance to
humidity . 52
14.1 Resistance to ageing . 52
14.2 Protection provided by enclosures . 53
14.2.1 General . 53
14.2.2 Protection against access to hazardous parts and against harmful
effects due to ingress of solid foreign objects . 53
14.2.3 Protection against harmful effects due to ingress of water . 54
14.3 Resistance to humidity . 56
15 Insulation resistance and electric strength . 57
15.1 General . 57
15.2 Test for measuring the insulation resistance . 57
15.3 Electric strength test . 57
16 Temperature rise . 58
16.1 General . 58
16.2 Test . 59
16.3 Test for accessories with loop terminals . 61
17 Mechanical strength . 62
17.1 General . 62
17.2 Impact test with pendulum hammer . 62
17.3 Test for accessories with a main part intended to be mounted directly on a
surface . 65
17.4 Torque test for cable glands . 66
17.5 Tests on covers, cover-plates or parts of them according to 13.3.3a) . 66
17.5.1 66
17.5.2 66
17.5.3 67
17.6 Tests on covers, cover-plates or parts of them according to 13.3.3b) . 67
17.7 Tests on covers, cover-plates or parts of them according to 13.3.3c) . 68
17.8 Verification of the outline of covers fixed without screws on a mounting
surface or supporting surface . 68
17.9 Verification of grooves, holes and reverse tapers . 71
17.10 Mechanical tests of USB ports . 71
17.10.1 General . 71
17.10.2 USB port lateral strain test . 72
17.10.3 Resistance to mechanical force on a USB port during insertion . 72
17.10.4 Impact test. 72
18 Resistance to heat . 72

6 IEC CDV 63418 ED1 © IEC 2025
18.1 General . 72
18.2 Basic heating test . 73
18.3 Ball-pressure test at 125 °C . 73
18.4 Ball-pressure test at 70 °C or higher . 74
19 Screws, current-carrying parts and connections . 74
19.1 General . 74
19.2 Correct insertion of screws . 74
19.3 Contact pressure of electrical connections . 75
19.4 Screws and rivets used both as electrical and mechanical connections . 75
19.5 Material of current-carrying parts . 75
19.6 Contacts subjected to sliding actions . 76
19.7 Thread-forming and thread-cutting screws . 76
20 Creepage distances, clearances and distances through sealing compound . 76
20.1 General . 76
20.2 Insulating sealing compound . 78
21 Resistance of insulating material to abnormal heat, to fire and to tracking . 78
21.1 Resistance to abnormal heat and to fire . 78
21.1.1 General . 78
21.1.2 Glow-wire test . 78
21.2 Resistance to tracking. 80
22 Resistance to rusting . 80
23 EMC requirements . 81
23.1 General . 81
23.2 Immunity . 81
23.2.1 General . 81
23.2.2 Voltage dips and short interruptions . 82
23.2.3 Surge immunity test for 1,2/50 wave impulses . 82
23.2.4 Electrical fast transient/burst test . 83
23.2.5 Electrostatic discharge test . 83
23.2.6 Radiated electromagnetic field test . 84
23.2.7 Radio-frequency voltage test . 84
23.3 Emission . 84
23.3.1 General . 84
23.3.2 Low-frequency emission . 85
23.3.3 Radio-frequency emission . 85
24 Electromagnetic fields (EMF) requirements. 85
25 Abnormal conditions . 85
25.1 General . 85
25.2 Temperature rise under abnormal conditions . 85
25.2.1 Overview . 85
25.2.2 General . 85
25.3 Protection against electric shock after fault conditions arise . 87
25.4 Short circuit in the looping circuit . 87
Annex A (normative) Safety-related routine tests for electric strength test control -
Electric strength test of the accessory . 90
Annex B (informative) Guidance for the measurement of the working voltage between
Primary and Secondary of Transformer. 92

IEC CDV 63418 ED1 © IEC 2025 7
Annex C (normative) Additional requirements for accessories provided with insulation-
piercing terminals . 93
Bibliography . 99

Figure 1 – Example of thread-forming screw (3.9) . 15
Figure 2 – Example of thread-cutting screw (3.10) . 15
Figure 3 – Examples of membranes and grommets . 16
Figure 4 – Test piston dimensions . 26
Figure 5 – Pillar terminals (3.5) . 31
Figure 6 – screw head terminals (3.7) terminals . 32
Figure 7 – Arrangement for checking damage to conductors . 34
Figure 8 – Information for deflection test . 43
Figure 9 – Verification of the requirements of 13.2 . 46
Figure 10 – Area A of the USB port . 53
Figure 11 – Types of test wall . 55
Figure 12 – Examples of current path for testing loop terminals . 62
Figure 13 – Sketches showing the application of the blows according to Table 17 . 64
Figure 14 – Arrangement for test on covers or cover-plates . 67
Figure 15 – Gauge (thickness about 2 mm) for the verification of the outline of covers
or cover-plates . 68
Figure 16 – Examples of application of the gauge of Figure 15 on covers fixed without
screws on a mounting surface or supporting surface . 69
Figure 17 – Examples of application of the gauge of Figure 15 in accordance with the
requirements of 17.8 . 70
Figure 18 – Gauge for verification of grooves, holes and reverse tapers . 71
Figure 19 – Sketch showing the direction of application of the gauge of Figure 18 . 71
Figure 20 – Ball pressure test apparatus . 73
Figure 21 – Diagrammatic representation of 21.1.2 . 79
Figure 22 – Minimum creepage and clearances on printed circuit boards . 87
Figure 23 – Circuit diagram for short circuit testing of the looping circuit . 88
Figure B.1 – . 92
Figure C.1 – Example of IPTs . 97
Figure C.2 – Example of test-points . 97
Figure C.3 – Temperature cycle for voltage drop test 12.4.11 . 98

Table 1 – Testing voltage and frequency . 19
Table 2 – Connectable nominal cross-sectional areas of copper conductors . 30
Table 3 – . 31
Table 4 – . 32
Table 5 – Values for pull test for screw-type terminals . 35
Table 6 – Composition of conductors . 36
Table 7 – Tightening torques for the verification of the mechanical strength of screw-
type terminal . 37
Table 8 – Values for flexing under mechanical load test for copper conductors . 40

8 IEC CDV 63418 ED1 © IEC 2025
Table 9 – Test current for the verification of electrical and thermal stresses in normal
use for screwless-type terminals . 41
Table 10 – Nominal cross-sectional areas of rigid copper conductors for deflection test
of screwless-type terminals . 43
Table 11 – Deflection test forces for screwless-type terminals . 43
Table 12 – Forces to be applied to covers, cover-plates or actuating members whose
fixing is not dependent on screws . 47
Table 13 – External cable dimension limits for surface-type accessories . 49
Table 14 – Permissible temperature rise values . 59
Table 15 – Loop test current for accessories with loop terminals . 61
Table 16 – Height of fall for impact tests . 63
Table 17 – . 65
Table 18 – Torque test values for cable glands . 66
Table 19 – Resistance to heat of different types or parts of accessories . 72
Table 20 – Creepage distances, clearances and distances through insulating sealing
compound . 76
Table 21 – Immunity tests (overview) . 81
Table 22 – Voltage dip and short-interruption test values . 82
Table 23 – Surge immunity test voltages . 82
Table 24 – Fast transient test values . 83
Table 25 – Values for radiated electromagnetic field test of IEC 61000-4-3 . 84
Table A.1 – Test voltages . 90
Table C.1 – Maximum dimensions of copper conductors for IPT . 97

IEC CDV 63418 ED1 © IEC 2025 9
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Fixed accessories intended for household and similar purposes that
supply power through an interface –

FOREWORD
a) 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.
b) 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.
c) 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.
d) 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.
e) 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.
f) All users should ensure that they have the latest edition of this publication.
g) 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.
h) 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.
i) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC [had/had not] received notice of (a) patent(s),
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the pat ent database available at
https://patents.iec.ch. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 63418 has been prepared by subcommittee XX: TITLE, of IEC technical committee XX: TITLE. It
is an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/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 [change language if
necessary].
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

10 IEC CDV 63418 ED1 © IEC 2025
www.iec.ch/members_experts/refdocs. The main document types developed by IEC are described in
greater detail at www.iec.ch/publications.
The committee has decided that the contents of this document will remain unchanged until the stability
date indicated on the IEC website under webstore.iec.ch in the data related to the specific document.
At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IEC CDV 63418 ED1 © IEC 2025 11
1 Scope
This document applies to fixed accessories designed to supply power at Extra Low Voltage through a
USB port connected to a fixed installation not exceeding 250 V AC or to an extra low voltage DC local
/ private distribution network not exceeding 60 V, intended for household and similar purposes, either
indoors or outdoors.
This document covers only those requirements for mounting boxes which are necessary for the tests
on the accessory.
NOTE 1 Requirements for general purpose mounting boxes are given in IEC 60670-1.
This document defines the safety and EMC requirements for accessories that supply power through
an interface.
Specifications, performance or dimensional requirements of the USB technology are not covered by
this standard; these are defined in the relevant part(s) of IEC 62680.
NOTE 2 Requirements concerning wireless interface are under consideration.
The document does not apply to:
– Socket-outlets incorporating USB power supply, covered by IEC 60884-3-1;
– Transformers, reactors, power supply units and combinations thereof, covered by IEC 61558
series;
– Power electronic converter systems and equipment covered by IEC 62477-1;
– Electrical power/energy transfer systems for electrically propelled road vehicles and
industrial trucks covered by IEC 61980 series;
– Electric Vehicles conductive power supply system covered by IEC 61851 series;
– Appliance couplers for household and similar general purposes covered by IEC 60320
series;
– DC plugs and socket-outlets systems covered by IEC / TR 62735 series;
– Luminaires couplers covered by IEC 61995 series;
– Equipment in the field of audio/video and similar technology, information technology and
communication technology covered by IEC 62368 series.
– Power supply using communication cabling such as PoE.
Accessories 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.
This document gives additional requirements for accessories provided with insulation-piercing
terminals, see C (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 60068-2-75:2014, 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 60127 (all parts), Miniature fuses

12 IEC CDV 63418 ED1 © IEC 2025
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 60317-0-1:2013, Specifications for particular types of winding wires - Part 0-1: General
requirements - Enamelled round copper wire
IEC 60317-0-1:2013/AMD1:2019,
IEC 60417:2024 DB:2024, Graphical symbols for use on equipment - 12-month subscription to
regularly updated online database comprising all graphical symbols published in IEC 60417
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 60670 (all parts), Boxes and enclosures for electrical accessories for household and similar
fixed electrical installations
IEC 60670-1, Boxes and enclosures for electrical accessories for household and similar fixed
electrical installations - Part 1: General requirements
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 60998-2-1, Connecting devices for low-voltage circuits for household and similar purposes
- Part 2-1: Particular requirements for connecting devices as separate entities with screw -type
clamping units
IEC 60998-2-2, Connecting devices for low-voltage circuits for household and similar purposes
- Part 2-2: Particular requirements for connecting devices as separate entities with screwless -
type clamping units
IEC 61000-3-2:2018/AMD2:2024, Amendment 2 - Electromagnetic compatibility (EMC) - Part 3-
2: Limits - Limits for harmonic current emissions (equipment input current ≤ 16 A per phase)
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement
techniques - Electrostatic discharge immunity test
IEC 61000-4-2, Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement
techniques - Electrostatic discharge immunity test
IEC 61000-4-3, Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement
techniques - Radiated, radio-frequency, electromagnetic field immunity test

IEC CDV 63418 ED1 © IEC 2025 13
IEC 61000-4-3:2020, Electromagnetic compatibility (EMC) - Part 4-3 : Testing and
measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4:2012, Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst immunity test
IEC 61000-4-4, Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst immunity test
IEC 61000-4-5, Electromagnetic compatibility (EMC) - Part 4-5: Testing and measurement
techniques - Surge immunity test
IEC 61000-4-5:2014, Electromagnetic compatibility (EMC) - Part 4-5: Testing and measurement
techniques - Surge immunity test
IEC 61000-4-5:2014/AMD1:2017, Amendment 1 - Electromagnetic compatibility (EMC) - Part 4-
5: Testing and measurement techniques - Surge immunity test
IEC 61000-4-6, Electromagnetic compatibility (EMC) - Part 4-6: Testing and measurement
techniques - Immunity to conducted disturbances, induced by radio-frequency fields
IEC 61000-4-6:2023, Electromagnetic compatibility (EMC) - Part 4-6: Testing and measurement
techniques - Immunity to conducted disturbances, induced by radio-frequency fields
IEC 61000-4-11, Electromagnetic compatibility (EMC) - Part 4-11: Testing and measurement
techniques - Voltage dips, short interruptions and voltage variations immunity tests for
equipment with input current up to 16 A per phase
IEC 61000-4-11:2020, Electromagnetic compatibility (EMC) - Part 4-11: Testing and
measurement techniques - Voltage dips, short interruptions and voltage variations immunity
tests for equipment with input current up to 16 A per phase
IEC 61032:1997, Protection of persons and equipment by enclosures - Probes for verification
IEC 61058 (all parts), Switches for appliances
IEC 62368-1:2023, Audio/video, information and communication technology equipment - Part
1: Safety requirements
IEC 62368-1:2023, Audio/video, information and communication technology equipment - Part
1: Safety requirements
IEC 62368-3:2017, Audio/video, information and communication technology equipment - Part
3: Safety aspects for DC power transfer through communication cables and ports
IEC 62479:2010, Assessment of the compliance of low-power electronic and electrical
equipment with the basic restrictions related to human exposure to electromagnetic fields (10
MHz to 300 GHz)
IEC 62680 (all parts), Universal serial bus interfaces for data and power
IEC 62680-1-2, Universal serial bus interfaces for data and power - Part 1-2: Common
components - USB Power Delivery specification
IEC 62680-1-3, Universal serial bus interfaces for data and power - Part 1-3: Common
components - USB Type-C® Cable and Connector Specification

14 IEC CDV 63418 ED1 © IEC 2025
IEC 62911, Audio, video and information technology equipment - Routine electrical safety
testing in production
CISPR 32, Electromagnetic compatibility of multimedia equipment - Emission requirements
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.
3.1
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 accessory
3.2
terminal
insulated or non-insulated connecting device intended for reusable electrical connection of the
external conductors
3.3
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]
3.4
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 pill
...