HD 60364-5-51:2006

SLOVENSKI SIST HD 60364-5-51:2006

STANDARD
september 2006
Električne inštalacije zgradb – 5-51. del: Izbira in namestitev električne
opreme – Splošna pravila (IEC 60364-5-51:2001, spremenjen)
Electrical installations of buildings - Part 5-51: Selection and erection of electrical
equipment - Common rules (IEC 60364-5-51:2001, modified)
ICS 91.140.50 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

HARMONIZATION DOCUMENT
HD 60364-5-51
DOCUMENT D'HARMONISATION
April 2006
HARMONISIERUNGSDOKUMENT
ICS 13.260; 91.140.50 Supersedes HD 384.5.51 S2:1996

English version
Electrical installations of buildings
Part 5-51: Selection and erection of electrical equipment -
Common rules
(IEC 60364-5-51:2001, modified)

Installations électriques des bâtiments Elektrische Anlagen von Gebäuden
Partie 5-51: Choix et mise en oeuvre Teil 5-51: Auswahl und Errichtung
des matériels électriques - elektrischer Betriebsmittel -
Règles communes Allgemeine Bestimmungen
(CEI 60364-5-51:2001, modifiée) (IEC 60364-5-51:2001, modifiziert)

This Harmonization Document was approved by CENELEC on 2005-09-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for implementation of this
Harmonization Document at national level.

Up-to-date lists and bibliographical references concerning such national implementations may be obtained on
application to the Central Secretariat or to any CENELEC member.

This Harmonization Document exists in three official versions (English, French, German).

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. HD 60364-5-51:2006 E
Foreword
The text of the International Standard IEC 60364-5-51:2001, prepared by IEC TC 64, Electrical installations
and protection against electric shock, together with the common modifications prepared by SC 64B,
Protection against thermal effects, of Technical Committee CENELEC TC 64, Electrical installations and
protection against electric shock, was submitted to the formal vote and was approved by CENELEC as
HD 60364-5-51 on 2005-09-01.
This European Standard supersedes HD 384.5.51 S2:1996.

The following dates were fixed:

– latest date by which the existence of the HD (doa) 2006-03-01
has to be announced at national level
– latest date by which the HD has to be implemented (dop) 2006-11-01
at national level by publication of a harmonized
national standard or by endorsement

– latest date by which the national standards conflicting (dow) 2008-09-01
with the HD have to be withdrawn

Annexes ZA, ZB, ZC, ZD and ZE have been added by CENELEC.

Clauses, subclauses, notes, tables and figures which are additional to those in IEC 60364-5-51 are prefixed
“Z”.
Common modifications are indicated by a vertical line in the left margin of the text.
_____________
– 3 – HD 60364-5-51:2006
510  Introduction
510.1  Scope
This part of HD 60364 deals with the selection of equipment and its erection. It provides common rules for
compliance with measures of protection for safety, requirements for proper functioning for intended use of
the installation, and requirements appropriate to the external influences.
510.2  Normative references
The following referenced documents are indispensable for the application 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.
Publication Year Title EN/HD Year
IEC 60068-2-11 1981 Environmental testing - Part 2: Tests - Test EN 60068-2-11 1999
Ka: Salt mist
IEC 60073 2002 Basic and safety principles for man-machine EN 60073 2002
interface, marking and identification – Coding
principles for indicators and actuators
IEC 60079 series Electrical apparatus for explosive gas EN 60079 series
atmospheres
IEC 60255-22-1 1988 Electrical relays – Part 22: Electrical - -
disturbance tests for measuring relays and
protection equipment
Section 1: 1 MHz burst disturbance tests
IEC 60364-3 1993 Electrical installation of buildings HD 384.3 1995
(mod) Part 3: Assessment of general characteristics
1)
IEC 60364-4-41 Part 4-41: Protection for safety – Protection HD 384.4.41 1996
against electric shock + A1 2002
2)
IEC 60364-4-42 Part 4-42: Protection for safety - Protection HD 384.4.42 1985
against thermal effects + A1 1992
IEC 60364-4-44 2001 Part 4-44: Protection for safety - Protection - -
against voltages disturbances and
electromagnetic disturbances
3)
IEC 60364-5-52 Part 5-52: Selection and erection of electrical HD 384.5.52 1995
equipment – Wiring systems + A1 1998
+ corr. September 1998
IEC 60364-5-54 1980 Part 5-54: Selection and erection of electrical HD 384.5.54 1988
(mod) equipment – Earthing arrangements and
protective conductors
1)
IEC 60364-4-41:1992 + A2:1999, mod., are harmonized as HD 384.4.41 S2:1996 + A1:2002.
2)
IEC 60364-4-42:1980, mod., is harmonized as HD 384.4.42 S1:1985.
3)
IEC 60364-5-52:1993, mod., is harmonized as HD 384.5.52 S1:1995.

Publication Year Title EN/HD Year
IEC 60446 1999 Basic and safety principles for man-machine EN 60446 1999
+ corr. July 2002
interface, marking and identification -
Identification of conductors by colours or
numerals
IEC 60447 1993 Man-machine interface (MMI) – Actuating EN 60447 1993
principles
IEC 60617 series Graphical symbols for diagrams EN 60617 series
IEC 60707 1999 Flammability of solid non-metallic materials EN 60707 1999
when exposed to flame sources
List of test methods
IEC 60721-3-0 1984 Classification of environmental conditions
+ A1 1987 Part 3-0: Classification of groups of EN 60721-3-0 1993
environmental parameters and their severities
– Introduction
IEC 60721-3-3 1994 Part 3-3: Classification of groups of
+ A1 1995 environmental parameters and their severities EN 60721-3-3 1995
A2 1996 A2 1997
– Stationary use at weather-protected
locations
IEC 60721-3-4 1995 Part 3-4: Classification of groups of EN 60721-3-4 1995
A1 1996 environmental parameters and their severities A1 1997
- Stationary use at non-weather protected
locations
IEC 61000 series Electromagnetic compatibility (EMC) EN 61000 series
IEC 61000-2 series Electromagnetic compatibility (EMC) – Part 2: EN 61000-2 series
Environment -
IEC 61000-2-1 1990 Electromagnetic compatibility (EMC) – Part 2: - -
Environment - Section 1: Description of the
environment for low-frequency conducted
disturbances and signalling in public power
supply systems
IEC 61000-2-2 2002 Electromagnetic compatibility (EMC) – Part 2: EN 61002-2-2 2002
Environment - Section 2: Compatibility levels
for low-frequency conducted disturbances and
signalling in public power supply systems
IEC 61000-2-5 1995 Electromagnetic compatibility (EMC) – Part 2: - -
Environment - Section 5: Classification of
electromagnetic environments – Basic EMC
publication
IEC 61000-4 series Electromagnetic compatibility (EMC) – Part 4: EN 61000-4 Series
Testing and measurement techniques
IEC 61000-4-2 1995 Electromagnetic compatibility (EMC) – Part 4: EN 61000-4-2 1995
A1 1998 Testing and measurement techniques – A1 1998
A2 2000 Section 2: Electrostatic discharge immunity A2 2001
test
IEC 61000-4-3 2002 Electromagnetic compatibility (EMC) – Section EN 61000-4-3 2002
A1 2002 3: Radiated, radiofrequency, electromagnetic A1 2002
field immunity test
– 5 – HD 60364-5-51:2006
Publication Year Title EN/HD Year
IEC 61000-4-4 1995 Electromagnetic compatibility (EMC) – Section EN 61000-4-4 1995
4: Electrical fast transient/burst immunity test
A1 2000 A1 2001
A2 2001 A2 2001
IEC 61000-4-6 1996 Electromagnetic compatibility (EMC) – Section EN 61000-4-6 1996
A1 2000 6: Immunity to conducted disturbances, A1 2001
induced by radio-frequency fields
IEC 61000-4-8 1993 Electromagnetic compatibility (EMC) – Section EN 61000-4-8 1993
A1 2000 8: Power frequency magnetic field immunity A1 2001
test
IEC 61000-4-12 1995 Electromagnetic compatibility (EMC) – Section EN 61000-4-12 1995
A1 2000 12: Oscillatory waves immunity test A1 2001
IEC 61024-1 1990 Protection of structures against lightning – –
Part 1: General principles
IEC 61082 series Preparation of documents used in EN 61082 series
electrotechnology
IEC 61140 2001 Protection against electric shock – Common EN 61140 2002
aspects for installation and equipment
IEC 61346-1 1996 Industrial systems, installations and equipment EN 61346-1 1996
and industrial products – Structuring principles
and reference designations – Part 1: Basic
rules
IEC 62262 2002 Degrees of protection provided by enclosures EN 62262 2002
for electrical equipment against external
mechanical impacts (IK code)
– – Identification of cores in cables and flexible HD 308 S2 2001
cords
510.3  General
Every item of equipment shall be selected and erected so as to allow compliance with the rules stated in the
following clauses of this part of HD 384/60364 and the relevant rules in other parts of the HD 384/60364
series.
511  Compliance with standards
511.1  Every item of equipment shall comply with the appropriate European Standards (EN) or
Harmonization Documents (HD) or national standard implementing the HD. In absence of an EN or HD, the
equipment shall comply with the appropriate national standard. In all other cases, reference should be made
to the appropriate IEC standard or to an appropriate national standard of another country
511.2  Where there are no applicable standards, the item of equipment concerned shall be selected by
special agreement between the person specifying the installation and the installer.

512  Operational conditions and external influences
512.1  Operational conditions
512.1.1  Voltage
Equipment shall be suitable for the nominal voltage (r.m.s. value for a.c.) of the installation.
If, in IT installations, the neutral conductor is distributed, equipment connected between phase and neutral
shall be insulated for the voltage between phases.
NOTE For certain equipment, it may be necessary to take account of the highest and/or lowest voltage likely to occur in normal service.
512.1.2  Current
Equipment shall be selected for the design current (r.m.s. value for a.c.) which it has to carry in normal
service.
Equipment shall also be capable of carrying the currents likely to flow in abnormal conditions for such
periods of time as are determined by the characteristics of the protective devices.
512.1.3  Frequency
If frequency has an influence on the characteristics of equipment, the rated frequency of the equipment shall
correspond to the frequency of the current in the circuit concerned.
512.1.4  Power
Equipment selected for its power characteristics shall be suitable for the normal operational conditions taking
account of the load factor.
512.1.5  Compatibility
Unless other suitable precautions are taken during erection, all equipment shall be selected so that it will not
cause harmful effects on other equipment nor impair the supply during normal service, including switching
operations.
NOTE Information on the parameters to be considered is given in Chapter 33 and Clause 444.
512.1.Z1  Impulse voltage withstand
Equipment shall be selected so that its rated impulse voltage withstand is at least equal to the prospective
overvoltage at the point of installation as defined in Clause 443.
512.2 External influences
(see Annex ZA)
– 7 – HD 60364-5-51:2006
513  Accessibility
513.1  General
All equipment, including wiring, shall be arranged so as to facilitate its operation, inspection and
maintenance and access to its connections. Such facilities shall not be significantly impaired by mounting
equipment in enclosures or compartments.
514  Identification
514.1  General
Labels or other suitable means of identification shall be provided to indicate the purpose of switchgear and
controlgear, unless there is no possibility of confusion.
Where the functioning of switchgear and controlgear cannot be observed by the operator and where this
might cause a danger, a suitable indicator, complying where applicable with EN 60073 and EN 60447, shall
be fixed in a position visible to the operator.
514.2  Wiring systems
Wiring shall be so arranged or marked that it can be identified for inspection, testing, repairs or alteration of
the installation.
514.3  Identification of neutral and protective conductors
514.3.1  General
Unless otherwise stated in 514.3.1.Z1 to 514.3.Z5, the identification of conductors shall comply with
EN 60446, Basic and safety principles for man-machine interface, marking and identification - Identification
of conductors by colours or numerals.
514.3.1.Z1  Neutral or mid-point conductor
Neutral or mid-point conductors shall be identified by the colour blue throughout their length.
NOTE For certain type of wiring, see 514.3.Z2 up to 514.3.Z5.
514.3.1.Z2  Protective conductor
Protective conductors shall be identified by the bi-colour combination green-and-yellow and this combination
shall be used for no other purposes.
NOTE For certain type of wiring, see 514.3.Z2, 514.3.Z3 and 514.3.Z5.
514.3.2  PEN conductor
PEN conductors shall, when insulated, be marked by one of the following methods:
- green-and-yellow throughout their length with, in addition, blue markings at the terminations; or
- blue throughout their length with, in addition, green-and-yellow markings at the terminations.
NOTE The choice of method, or methods, for identifying PEN conductors is intended to be
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