IEC 60947-1:2007/AMD1:2010

IEC 60947-1 ®
Edition 5.0 2010-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage switchgear and controlgear –
Part 1: General rules
Appareillage à basse tension –
Partie 1: Règles générales
IEC 60947-1:2007/A1:2010
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IEC 60947-1 ®
Edition 5.0 2010-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Low-voltage switchgear and controlgear –
Part 1: General rules
Appareillage à basse tension –
Partie 1: Règles générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
W
CODE PRIX
ISBN 978-2-88912-291-2
ICS 29.130.20
– 2 – 60947-1 Amend.1 Ó IEC:2010

FOREWORD
This amendment has been prepared by subcommittee 17B: Low-voltage switchgear and

controlgear, of IEC technical committee 17: Switchgear and controlgear.

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

FDIS Report on voting
17B/1710/FDIS 17/1721/RVD
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 publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
1 General
Replace the existing note of this clause by the following new note:
NOTE The product standards forming the series of IEC standards covering low-voltage switchgear and
controlgear are:
IEC 60947-2: Part 2: Circuit-breakers
IEC 60947-3: Part 3: Switches, disconnectors, switch-disconnectors and fuse combination units
IEC 60947-4: Part 4: Contactors and motor-starters
IEC 60947-5: Part 5: Control-circuit devices and switching elements

IEC 60947-6: Part 6: Multiple function equipment
IEC 60947-7: Part 7: Ancillary equipment
IEC 60947-8: Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines.

60947-1 Amend.1 Ó IEC:2010 – 3 –

1.2 Normative references
Add the following normative references to the existing list:

IEC 60664-3:2003, Insulation coordination for equipment within low-voltage systems – Part 3:

Use of coating, potting or moulding for protection against pollution

IEC 60664-5:2007, Insulation coordination for equipment within low-voltage systems – Part 5:

Comprehensive method for determining clearances and creepage distances equal to or less

than 2 mm
IEC 60695-2-12, Fire hazard testing – Part 2-12: Glowing/hot-wire based test methods –
Glow-wire flammability test method for materials
IEC 60999-1:1999, Connecting devices – Electrical copper conductors – Safety requirements
for screw-type and screwless-type clamping units – Part 1: General requirements and
particular requirements for clamping units for conductors from 0,2 mm² up to 35 mm²
(included)
IEC 60999-2:2003, Connecting devices – Electrical copper conductors – Safety requirements
for screw-type and screwless-type clamping units – Part 2: Particular requirements for
2 2
clamping units for conductors above 35 mm up to 300 mm (included)
IEC 61557-2, Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500
V d.c. – Equipment for testing, measuring or monitoring of protective measures – Part 2:
Insulation resistance
2 Definitions
Replace, in the alphabetical list, the existing references to these terms by the following new
references:
Clamping unit . 2.3.26
Multiple tip contact system . 2.3.29
Prepared conductor . 2.3.28
Screw-type terminal . 2.3.24
Screwless-type terminal . 2.3.25
Unprepared conductor . 2.3.27

This correction does not apply to the English text.
Add, in the alphabetical list, the following new terms and references:
Connecting device . 2.3.22
Electronically controlled electromagnet . 2.3.32
Electronic overload relay with current or voltage asymmetry function . T.2.2
Electronic overload relay with ground/earth fault detection function . T.2.1
Electronic overload relay with phase reversal function . T.2.3
Electronic overload relay with over voltage function . T.2.4
Electronic overload relay with under power function . T.2.6
External control device . U.1.1
Inhibit current . T.2.5
Maximum cross-section . 2.3.31
Minimum cross-section. 2.3.30
Non-universal clamping unit. 2.3.26.2
Non-universal terminal . 2.3.25.2

– 4 – 60947-1 Amend.1 Ó IEC:2010

Push-wire terminal . 2.3.25.3

Terminal . 2.3.23

Universal clamping unit . 2.3.26.1

Universal terminal. 2.3.25.1

Replace the existing terms and definitions 2.3.22 to 2.3.28 by the following new terms and

definitions:
2.3.22
connecting device
a device for the electrical connection of one (or more) conductor(s), comprising one (or more)
terminal(s), either fixed to a base or forming an integral part of the equipment
[IEC 60999-1:1999, 3.3]
2.3.23
terminal
conductive part of one pole of a device for electrical connection to external circuit, composed
of one or more clamping unit(s) and insulation if necessary
[IEC 60999-1:1999, 3.2, modified]
2.3.24
screw-type terminal
terminal intended for the connection and disconnection of conductors or for the inter-
connection of two or more conductors, the connection being made, directly or indirectly, by
means of screws or nuts of any kind
NOTE Examples are given in Annex D.
2.3.25
screwless-type terminal
terminal intended for the connection and disconnection of conductors or for the
interconnection on two or more conductors, the connection being made, directly or indirectly,
by means of springs, wedges, eccentrics or cones, etc.
NOTE Examples are given in Annex D.
2.3.25.1
universal terminal
terminal for the connection and disconnection of all types of conductors (rigid and flexible)

[IEC 60998-2-2:2002, 3.101.1]
2.3.25.2
non-universal terminal
terminal for the connection and disconnection of a certain kind of conductor only (for example,
solid conductors only or rigid [solid and stranded] conductors only)
[IEC 60998-2-2:2002, 3.101.2]
2.3.25.3
push-wire terminal
non-universal terminal in which the connection is made by pushing in rigid (solid or stranded)
conductors
[IEC 60998-2-2:2002, 3.101.3]
60947-1 Amend.1 Ó IEC:2010 – 5 –

2.3.26
clamping unit
the 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 the correct

contact pressure
[IEC 60999-1:1999, 3.1]
2.3.26.1
universal clamping unit
clamping unit intended for all types of conductors

2.3.26.2
non-universal clamping unit
clamping unit intended for certain types of conductors only, for example:
– push-wire clamping unit for solid conductors only
– push-wire clamping unit for rigid (solid and stranded) conductors only
NOTE On push-wire clamping unit the connection is made by simple insertion of rigid conductors. (see 7.1.8.1)
2.3.27
unprepared conductor
conductor which has been cut and the insulation of which has been removed for insertion into
a terminal
NOTE A conductor the shape of which is arranged for introduction into a terminal or the strands of which are
twisted to consolidate the end is considered to be an unprepared conductor.
2.3.28
prepared conductor
conductor, the strands of which are soldered or the end of which is fitted with a cable lug,
eyelet, etc.
Add, after definition 2.3.28, the following new terms and definitions 2.3.29 to 2.3.32 :
2.3.29
multiple tip contact system
contact system comprising more than one contact gap per pole, which can be switched, in
series and/or in parallel
2.3.30
minimum cross-section
value of the smallest connectable conductor cross-section stated by the manufacturer as
suitable for the terminal
NOTE The manufacturer may declare several minimum cross-sections depending on the type of conductor, for
example rigid, stranded, flexible, with or
...