SIST HD 60364-1:2008

Low-voltage electrical installations -- Part 1: Fundamental principles, assessment of general characteristics, definitions

Gives the rules for the design, erection, and verification of electrical installations. The rules are intended to provide for the safety of persons, livestock and property against dangers and damage which may arise in the reasonable use of electrical installations and to provide for the proper functioning of those installations. IEC 60364-1 applies to the design, erection and verification of electrical installations such as those of a) residential premises; b) commercial premises; c) public premises; d) industrial premises; e) agricultural and horticultural premises; f) prefabricated buildings; g) caravans, caravan sites and similar sites; h) construction sites, exhibitions, fairs and other installations for temporary purposes; i) marinas; j) external lighting and similar installations; k) medical locations; l) mobile or transportable units; m) photovoltaic systems; n) low-voltage generating sets. IEC 60364-1 covers a) circuits supplied at nominal voltages up to and including 1 000 V a.c. or 1 500 V d.c.; b) circuits, other than the internal wiring of apparatus, operating at voltages exceeding 1 000 V and derived from an installation having a voltage not exceeding 1 000 V a.c., for example, discharge lighting, electrostatic precipitators; c) wiring systems and cables not specifically covered by the standards for appliances; d) all consumer installations external to buildings; e) fixed wiring for information and communication technology, signalling, control and the like (excluding internal wiring of apparatus); f) the extension or alteration of the installation and also parts of the existing installation affected by the extension or alteration.

Errichten von Niederspannungsanlagen -- Teil 1: Allgemeine Grundsätze, Bestimmungen allgemeiner Merkmale, Begriffe

Installations électriques à basse tension -- Partie 1: Principes fondamentaux, détermination des caractéristiques générales, définitions

Donne des règles pour la conception, la mise en  uvre et la vérification des installations électriques. Ces règles sont Destinées à assurer la sécurité des personnes, des animaux et des biens contre les dangers et les dommages susceptibles de se produire lors d'une utilisation raisonnable des installations électriques et à assurer le fonctionnement correct de ces installations. La CEI 60364-1 s'applique à la conception, à la mise en  uvre et aux vérifications des installations électriques telles que celles des: a) bâtiments à usage d'habitation; b) bâtiments à usage commercial; c) établissements recevant du public; d) établissements industriels; e) établissements agricoles et horticoles; f) bâtiments préfabriqués; g) caravanes, terrains de campement et installations analogues; h) hantiers, fêtes foraines, foires, expositions et autres installations temporaires; i) marinas; j) éclairages extérieurs et analogues; k) locaux médicaux; l) unités  mobiles ou transportables; m) réseaux photovoltaïques; n) groupes générateurs à basse tension. La CEI 60364-1 est applicable: a) aux circuits alimentés sous une tension nominale au plus égale à 1 000 V en courant alternatif et à 1 500 V en courant continu; b) aux circuits, autres que les circuits internes des appareils, fonctionnant sous une tension supérieure à 1 000 V à partir d'une installation de tension au plus égale à 1 000 V en courant alternatif, par exemple: circuits de lampes à décharge, dépoussiéreurs électrostatiques; c) à tout câblage et à toute canalisation qui ne font pas l'objet des normes relatives aux appareils d'utilisation; d) à toutes les installations d'utilisateur situées à l'extérieur des bâtiments; e) aux canalisations fixes de communication, de signalisation ou de commande (à l'exception de circuits internes des appareils); f) aux extensions ou modifications d'installations ainsi qu'aux parties des installations existantes affectées par ces extensions ou modifications.

Nizkonapetostne električne inštalacije - 1. del: Temeljna načela, ocena splošnih karakteristik, definicije (IEC 60364-1:2005, spremenjen)

V HD 60364-1 so navedena pravila za načrtovanje, postavitev in preverjanje nizkonapetostnih električnih inštalacij. Pravila so namenjena zagotavljanju varnosti ljudi, živali in imetja pred nevarnostmi in poškodbami, ki lahko nastanejo ob normalni uporabi električnih inštalacij, ter zagotavljanju neoporečnega delovanja teh inštalacij.

General Information

• Status: Published
• Publication Date: 24-Sep-2008
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: ELI - Electrical and communication installations
• Current Stage: 6100 - Translation of adopted SIST standards (Adopted Project)
• Start Date: 28-Nov-2008
• Due Date: 27-Nov-2009
• Completion Date: 31-Mar-2009
• Ref Project: HD 60364-1:2008 - Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions

Relations

• Replaces: SIST HD 384.3 S2:2000 - Electrical installations of buildings -- Part 3: Assessment of general characteristics (IEC 60364–3:1993, modified)
• Effective Date: 28-Jan-2023
• Replaces: SIST HD 384.1 S2:2003 - Electrical installations of buildings -- Part 1: Scope, object and fundamental principles
• Effective Date: 01-Dec-2008
• Replaces: SIST HD 384.1 S2:2003 - Electrical installations of buildings -- Part 1: Scope, object and fundamental principles
• Effective Date: 28-Jan-2023
• Replaces: SIST HD 384.3 S2:2000 - Electrical installations of buildings -- Part 3: Assessment of general characteristics (IEC 60364–3:1993, modified)
• Effective Date: 01-Dec-2008
• Amended By: SIST HD 60364-1:2008/A11:2017 - Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions
• Effective Date: 01-Oct-2017
• Replaces: SIST IEC 60364-1:2006 - Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions
• Effective Date: 01-May-2010
• Revised: oSIST prHD 60364-1:2023 - Low-voltage electrical installations - Part 1: Fundamental principles, assessment of general characteristics, definitions
• Effective Date: 06-Nov-2018
• Replaces: SIST HD 384.3 S2:2000 - Electrical installations of buildings -- Part 3: Assessment of general characteristics (IEC 60364–3:1993, modified)
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST HD 60364-1:2008
01-november-2008
1DGRPHãþD
SIST HD 384.1 S2:2003
SIST HD 384.3 S2:2000
1L]NRQDSHWRVWQHHOHNWULþQHLQãWDODFLMHGHO7HPHOMQDQDþHODRFHQDVSORãQLK
NDUDNWHULVWLNGHILQLFLMH,(&VSUHPHQMHQ
Low-voltage electrical installations - Part 1: Fundamental principles, assessment of
general characteristics, definitions
Errichten von Niederspannungsanlagen - Teil 1: Allgemeine Grundsätze, Bestimmungen
allgemeiner Merkmale, Begriffe
Installations électriques à basse tension - Partie 1: Principes fondamentaux,
détermination des caractéristiques générales, définitions
Ta slovenski standard je istoveten z: HD 60364-1:2008
ICS:
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
SIST HD 60364-1:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST HD 60364-1:2008

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SIST HD 60364-1:2008

HARMONIZATION DOCUMENT
HD 60364-1

DOCUMENT D'HARMONISATION
August 2008
HARMONISIERUNGSDOKUMENT

ICS 91.140.50 Supersedes HD 384.1 S2:2001 and HD 384.3 S2:1995


English version


Low-voltage electrical installations -
Part 1: Fundamental principles,
assessment of general characteristics, definitions
(IEC 60364-1:2005, modified)


Installations électriques à basse tension - Errichten von Niederspannungsanlagen -
Partie 1: Principes fondamentaux, Teil 1: Allgemeine Grundsätze,
détermination des caractéristiques Bestimmungen allgemeiner Merkmale,
générales, définitions Begriffe
(CEI 60364-1:2005, modifiée) (IEC 60364-1:2005, modifiziert)




This Harmonization Document was approved by CENELEC on 2008-05-01. 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, Bulgaria, 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


© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. HD 60364-1:2008 E

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SIST HD 60364-1:2008
HD 60364-1:2008 – 2 –
Foreword
The text of the International Standard IEC 60364-1:2005, prepared by IEC TC 64, Electrical
installations and protection against electric shock, together with the common modifications
prepared by the 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 60364-1 on 2008-05-01.
This Harmonization Document supersedes HD 384.1 S2:2001 + HD 384.3 S2:1995.
The following dates were fixed:
– latest date by which the existence of the HD
has to be announced at national level (doa) 2008-11-01
– latest date by which the HD has to be implemented
at national level by publication of a harmonized
national standard or by endorsement (dop) 2009-05-01

– latest date by which the national standards conflicting
with the HD have to be withdrawn (dow) 2011-05-01
In this Harmonization Document the common modifications to the International Standard are
indicated by a vertical line in the left margin of the text.
Annex ZA has been added by CENELEC.
__________

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– 3 – HD 60364-1:2008
Contents

11 Scope . 5
12 Normative references . 7
13 Fundamental principles . 8
131 Protection for safety . 8
131.1 G e ner a l . 8
131.2 Protection against electric shock . 8
131.3 Protection against thermal effects . 9
131.4 Protection against overcurrent . 9
131.5 Protection against fault currents . 9
131.6 Protection against voltage disturbances and measures against
electromagnetic influences . 9
131.7 Protection against power supply interruption . 9
132 Design . 10
132.1 G e ner a l . 10
132.2 Characteristics of available supply or supplies . 10
132.3 Nature of demand . 11
132.4 Electric supply systems for safety services or standby electric supply
systems . 11
132.5 Environmental conditions . 11
132.6 Cross-sectional area of conductors . 11
132.7 Type of wiring and methods of installation . 11
132.8 Protective equipment . 12
132.9 Emergency control . 12
132.10 Disconnecting devices . 12
132.11 Prevention of mutual detrimental influence . 12
132.12 Accessibility of electrical equipment . 12
132.13 Documentation for the electrical installation . 12
133 Selection of electrical equipment . 12
133.1 G e ner a l . 12
133.2 Characteristics . 13
133.3 Conditions of installation . 13
133.4 Prevention of harmful effects . 13
134 Erection and verification of electrical installations . 14
134.1 Erection . 14
134.2 In i ti a l ver if ic at i o n . 14
134.3 Periodic verification . 14
20 Terms and definitions . 14
30 Assessment of general characteristics. 15
31 Purposes, supplies and structure . 15
311 Maximum demand and diversity . 15
312 Conductor arrangement and system earthing . 15
312.1 Current-carrying conductors depending on kind of current . 15
312.2 Types of system earthing . 17

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SIST HD 60364-1:2008
HD 60364-1:2008 – 4 –
313 Supplies . 30
313.1 G e ner a l . 30
313.2 Supplies for safety services and standby systems . 30
314 Division of installation . 30
32 Classification of external influences . 31
33 Compatibility . 31
33.1 Compatibility of ch ar ac t e r i s t ic s . 31
33.2 Electromagnetic compatibility . 31
34 Maintainability . 31
35 Safety services . 32
35.1 G e ner a l . 32
35.2 Classification . 32
36 Continuity of service . 32
Annex A (informative) Examples of system earthing . 33
A.1 TN Systems (AC) . 33
A.2 TT-Systems (AC) . 37
A.3 IT-Systems (AC) . 38
A.4 TN-Systems (DC) . 41
A.5 TT-Systems (DC) . 43
A.6 IT-Systems (DC) . 44
Annex B (informative) Definitions – Application guide and explanations
to selected terms of IEC 60050–826 (IEV 826 – Electrical installations) . 45
Annex ZA (informative) A-deviations. 48
Bibliography . 49

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– 5 – HD 60364-1:2008

1)
11 Scope
HD 60364-1 gives the rules for the design, erection, and verification of low-voltage electrical
installations. The rules are intended to provide for the safety of persons, livestock and
property against dangers and damage which may arise in the reasonable use of electrical
installations and to provide for the proper functioning of those installations.
11.1 HD 60364-1 applies to the design, erection and verification of electrical installations
such as those of
a) residential premises;
b) commercial premises;
c) public premises;
d) industrial premises;
e) agricultural and horticultural premises;
f) prefabricated buildings;
g) caravans, caravan sites and similar sites;
h) construction sites, exhibitions, fairs and other installations for temporary purposes;
i) marinas;
j) external lighting and similar installations (see, however,11.3 e));
k) medical locations;
l) mobile or transportable units;
m) photovoltaic systems;
n) low-voltage generating sets.
NOTE “Premises” covers the land and all facilities including buildings belonging to it.
11.2 HD 60364-1 covers
a) circuits supplied at nominal voltages up to and including 1 000 V a.c. or 1 500 V d.c.;
For a.c., the preferred frequencies which are taken into account in this standard are
50 Hz, 60 Hz and 400 Hz. The use of other frequencies for special purposes is not
excluded.
b) circuits, other than the internal wiring of apparatus, operating at voltages exceeding
1 000 V and derived from an installation having a voltage not exceeding 1 000 V a.c., for
example, discharge lighting, electrostatic precipitators;
c) wiring systems and cables not specifically covered by the standards for appliances;
d) all consumer installations external to buildings;
e) fixed wiring for information and communication technology, signalling, control and the like
(excluding internal wiring of apparatus);
f) the extension or alteration of the installation and also parts of the existing installation
affected by the extension or alteration.
NOTE The rules of HD 60364-1 are intended to apply to electrical installations generally but, in certain cases,
they may need to be supplemented by the requirements or recommendations of other CENELEC standards (for
example, for installations in explosive gas atmospheres).
—————————
1)
The numbering system is explained in Annex A of IEC 60364-1:2005.

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SIST HD 60364-1:2008
HD 60364-1:2008 – 6 –
11.3 HD 60364-1 does not apply to
a) electric traction equipment, including rolling stock and signaling equipment;
b) electrical equipment of motor vehicles, except those covered in Part 7;
c) electrical installations on board ships and mobile and fixed offshore platforms;
d) electrical installations in aircraft;
e) public street-lighting installations which are part of the public power grid;
f) installations in mines and quarries;
g) radio interference suppression equipment, except where it affects the safety of the
installation;
h) electric fences;
i) external lightning protection systems for buildings (LPS);
NOTE  Atmospheric phenomena are covered in HD 60364-1 but only insofar as effects on the electrical
installations are concerned (for example, with respect to selection of surge protective devices).
j) certain aspects of lift installations;
k) electrical equipment of machines.
11.4 HD 60364-1 is not intended to apply to
– systems for distribution of energy to the public, or
– power generation and transmission for such systems.
NOTE 1 Countries wishing to do so may, however, use this document in whole or in part for that purpose.
NOTE 2 According to HD 637 which provides common rules for the design and the erection of electrical power
installations in systems with nominal voltages above 1 kV a.c. and nominal frequency up to and including 60 Hz,
low- voltage a.c. and d.c. protection and monitoring systems should be in accordance with HD 60364 series.
11.5 Electrical equipment is dealt with only so far as its selection and application in the
installation are concerned.
This applies also to assemblies of electrical equipment complying with the relevant standards.

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12 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.

EN/HD Year Title IEC Year
HD 472 S1 1989 Nominal voltages for low voltage IEC 60038 (mod) 1983
2)

public electricity supply systems
- - International Electrotechnical IEC 60050-691
Vocabulary (IEV)
Chapter 691: Tariffs for electricity
- - International Electrotechnical IEC 60050-826
Vocabulary (IEV)
Part 826: Electrical installations
HD 384 / Electrical installations of buildings IEC 60364 (mod) Series
HD 60364 Series
EN 60445 Basic and safety principles for man- IEC 60445 (mod)
machine interface, marking and
identification - Identification of
equipment terminals and conductor
terminations
EN 60446 Basic and safety principles for man- IEC 60446
machine interface, marking and
identification - Identification of
conductors by colours or numerals
- - Graphical symbols for diagrams IEC 60617 Database
EN 60721 Series Classification of environmental IEC 60721 Series
conditions

—————————
2)
The title of IEC 60038 is: “IEC standard voltages”.

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SIST HD 60364-1:2008
HD 60364-1:2008 – 8 –
13 Fundamental principles
NOTE 1  Where countries not yet having national regulations for electrical installations deem it necessary to
establish legal requirements for this purpose, it is recommended that such requirements be limited to fundamental
principles which are not subject to frequent modification on account of technical development. The contents of
Clause 13 may be used as a basis for such legislation.
NOTE 2  This clause contains basic requirements. In other parts of this standard, more detailed requirements may
be given.
131 Protection for safety
131.1 General
The requirements stated in 131.2 to 131.7 are intended to provide for the safety of persons,
livestock and property against dangers and damage which may arise in the reasonable use of
electrical installations. The requirements to provide for the safety of livestock are applicable in
locations intended for them.
NOTE In electrical installations, the following hazards may arise:
– shock currents;
– excessive temperatures likely to cause burns, fires and other injurious effects;
– ignition of a potentially explosive atmosphere;
– undervoltages, overvoltages and electromagnetic influences likely to cause or result in injury or damage;
– power supply interruptions and/or interruption of safety services;
– arcing, likely to cause blinding effects, excessive pressure, and/or toxic gases;
– mechanical movement of electrically activated equipment.
131.2 Protection against electric shock
131.2.1 Basic protection (protection against direct contact)
NOTE  For low-voltage installations, systems and equipment, basic protection generally corresponds to protection
against direct contact.
Protection shall be provided against dangers that may arise from contact with live parts of the
installation by persons or livestock.
This protection can be achieved by one of the following methods:
– preventing a current from passing through the body of any person or any livestock;
– limiting the current which can pass through a body to a non-hazardous value.
131.2.2 Fault protection (protection against indirect contact)
NOTE  For low-voltage installations, systems and equipment, fault protection generally corresponds to protection
against indirect contact, mainly with regard to failure of basic insulation.
Protection shall be provided against dangers that may arise from contact with
exposed-conductive-parts of the installation by persons or livestock.
This protection can be achieved by one of the following methods:
– preventing a current resulting from a fault from passing through the body of any person or
any livestock;
– limiting the magnitude of a current resulting from a fault, which can pass through a body,
to a non-hazardous value;
– limiting the duration of a current resulting from a fault, which can pass through a body, to
a non-hazardous time period.

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131.3 Protection against thermal effects
The electrical installation shall be so arranged to minimize the risk of damage or ignition of
flammable materials due to high temperature or electric arc. In addition, during normal
operation of the electrical equipment, there shall be no risk of persons or livestock suffering
burns.
131.4 Protection against overcurrent
Persons and livestock shall be protected against injury and property shall be protected
against damage due to excessive temperatures or electromechanical stresses caused by any
overcurrent likely to arise in conductors.
Protection can be achieved by limiting the overcurrent to a safe value or duration.
131.5 Protection against fault currents
Conductors, other than live conductors, and any other parts intended to carry a fault current
shall be capable of carrying that current without attaining an excessive temperature. Electrical
equipment, including conductors shall be provided with mechanical protection against
electromechanical stresses of fault currents as necessary to prevent injury or damage to
persons, livestock or property.
Live conductors shall be protected against overcurrents arising from faults by the methods in
131.4.
NOTE Particular attention should be given to PE conductor and earthing conductor currents.
131.6 Protection against voltage disturbances and measures against
electromagnetic influences
131.6.1 Persons and livestock shall be protected against injury and property shall be
protected against any harmful effects as a consequence of a fault between live parts of
circuits supplied at different voltages.
131.6.2 Persons and livestock shall be protected against injury and property shall be
protected against damage as a consequence of overvoltages such as those originating from
atmospheric events or from switching.
NOTE For protection against direct lightning strikes, see EN 62305 series.
131.6.3 Persons and livestock shall be protected against injury and property shall be
protected against damage as a consequence of undervoltage and any subsequent voltage
recovery.
131.6.4 The installation shall have an adequate level of immunity against electromagnetic
disturbances so as to function correctly in the specified environment. The installation design
shall take into consideration the anticipated electromagnetic emissions, generated by the
installation or the installed equipment, which shall be suitable for the current-using equipment
used with, or connected to, the installation.
131.7 Protection against power supply interruption
Where danger or damage is expected to arise due to an interruption of supply, suitable
provisions shall be made in the installation or installed equipment.

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SIST HD 60364-1:2008
HD 60364-1:2008 – 10 –
132 Design
132.1 General
For the design of the electrical installation, the following factors shall be taken into account to
provide
– the protection of persons, livestock and property in accordance with Clause 131;
– the proper functioning of the electrical installation for the intended use.
The information required as a basis for design is listed in 132.2 to 132.5. The requirements
with which the design shall comply are stated in 132.6 to 132.12.
132.2 Characteristics of available supply or supplies
When designing electrical installations in accordance with HD 60364 series it is necessary to
know the characteristics of the supply. Relevant information from the network operator is
necessary to design a safe installation according to HD 60364 series. The characteristics of
the power supply should be included in the documentation to show conformity with HD 60364
series. If the network operator changes the characteristics of the power supply this may affect
the safety of the installation.
132.2.1 Nature of current: a.c. and/or d.c.
132.2.2 Function of conductors:
– for a.c.: line conductor(s);
 neutral conductor;
 protective conductor.
– for d.c.: line conductor(s);
 midpoint conductor;
 protective conductor.
NOTE The function of some conductors may be combined in a single conductor.
132.2.3 Values and tolerances:
– voltage and voltage tolerances;
– voltage interruptions, voltage fluctuations and voltage dips;
– frequency and frequency tolerances;
– maximum current allowable;
– earth fault loop impedance upstream of the origin of the installation;
– prospective short-circuit currents.
For standard voltages and frequencies, see HD 472.
132.2.4 Protective provisions inherent in the supply, for example, system earthing or
mid-point earthing
132.2.5 Particular requirements of the supply undertaking

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132.3 Nature of demand
The number and type of circuits required for lighting, heating, power, control, signalling,
information and communication technology, etc. shall be determined by
– location of points of power demand;
– loads to be expected on the various circuits;
– daily and yearly variation of demand;
– any special conditions such as harmonics;
– requirements for control, signalling, information and communication technology, etc;
– anticipated future demand if specified.
132.4 Electric supply systems for safety services or standby electric supply
systems
– Source of supply (nature, characteristics).
– Circuits to be supplied by the electric source for safety services or the standby electrical
source.
132.5 Environmental conditions
The design of the electrical installation shall take into account the environmental conditions to
which it will be subjected, see HD 60364-5-51 and EN 60721.
132.6 Cross-sectional area of conductors
The cross-sectional area of conductors shall be determined for both normal operating
conditions and for fault conditions according to
a) their admissible maximum temperature;
b) the admissible voltage drop;
c) the electromechanical stresses likely to occur due to earth fault and short-circuit currents;
d) other mechanical stresses to which the conductors can be subjected;
e) the maximum impedance with respect to the functioning of the protection against fault
currents;
f) the method of installation.
NOTE  The items listed above concern primarily the safety of electrical installations. Cross-sectional areas greater
than those required for safety may be desirable for economic operation.
132.7 Type of wiring and methods of installation
For the choice of the type of wiring and the methods of installation the following shall be taken
into account:
– the nature of the locations;
– the nature of the walls or other parts of the building supporting the wiring;
– accessibility of wiring to persons and livestock;
– voltage;
– the electromagnetic stresses likely to occur due to earth fault and short-circuit currents;
– electromagnetic interference;
– other stresses to which the wiring can be subjected during the erection of the electrical
installation or in service.

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SIST HD 60364-1:2008
HD 60364-1:2008 – 12 –
132.8 Protective equipment
The characteristics of protective equipment shall be determined with respect to their function
which may be, for example, protection against the effects of
– overcurrent (overload, short-circuit);
– earth fault current;
– overvoltage;
– undervoltage and no voltage.
The protective devices shall operate at values of current, voltage and time which are suitably
related to the characteristics of the circuits and to the possibilities of danger.
132.9 Emergency control
Where, in case of danger, there is the necessity for the immediate interruption of supply, an
interrupting device shall be installed in such a way that it can be easily recognized and
effectively and rapidly operated.
132.10 Disconnecting devices
Disconnecting devices shall be provided so as to permit switching and/or isolation of the
electrical installation, circuits or individual items of apparatus as required for operation,
inspection and fault detection, testing, maintenance and repair.
132.11 Prevention of mutual detrimental influence
The electrical installation shall be arranged in such a way that no mutual detrimental influence
will occur between electrical installations and non-electrical installations.
132.12 Accessibility of electrical equipment
The electrical equipment shall be arranged so as to afford as may be necessary:
– sufficient space for the initial installation and later replacement of individual items of
electrical equipment;
– accessibility for operation, inspection and fault detection, testing, maintenance and repair.
132.13 Documentation for the electrical installation
Every electrical installation shall be provided with appropriate documentation.
133 Selection of electrical equipment
133.1 General
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
appropriate EN or HD, the equi
...

SLOVENSKI SIST HD 60364-1

STANDARD
november 2008











Nizkonapetostne električne inštalacije – 1. del: Temeljna načela, ocena
splošnih karakteristik, definicije (IEC 60364-1:2005, spremenjen)

Low-voltage electrical installations – Part 1: Fundamental principles, assessment
of general characteristics, definitions (IEC 60364-1:2005, modified)

Installations électriques à basse tension – Partie 1: Principes fondamentaux,
détermination des caractéristiques générales, définitions (CEI 60364-1:2005,
modifiée)

Errichten von Niederspannungsanlagen – Teil 1: Allgemeine Grundsätze,
Bestimmungen allgemeiner Merkmale, Begriffe (IEC 60364-1:2005, modifiziert)





















Referenčna oznaka
ICS 91.140.50 SIST HD 60364-1:2008 (sl)


 Nadaljevanje na straneh od II in III in od 1 do 47



© 2009–04: Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST HD 60364-1 : 2008
NACIONALNI UVOD
Standard SIST HD 60364-1 (sl), Nizkonapetostne električne inštalacije – 1. del: Temeljna načela,
ocena splošnih karakteristik, definicije (IEC 60364-1:2005, spremenjen), 2008, ima status slovenskega
standarda in je istoveten evropskemu harmonizacijskemu dokumentu HD 60364-1 (en), Low-voltage
electrical installations – Part 1: Fundamental principles, assessment of general characteristics,
definitions (IEC 60364-1:2005, modified), 2008.
NACIONALNI PREDGOVOR
Evropski harmonizacijski dokument HD 60364-1:2008 je pripravil tehnični odbor Evropskega komiteja
za standardizacijo v elektrotehniki (CENELEC) CLC/TC 64 Električne inštalacije in zaščita pred
električnim udarom. Evropski harmonizacijski dokument je spremenjen mednarodni standard IEC
60364-1:2005, ki ga je pripravil tehnični odbor Mednarodne elektrotehniške komisije (IEC) IEC/TC 64
Električne inštalacije in zaščita pred električnim udarom.
Slovenski standard SIST HD 60364-1:2008 je prevod evropskega harmonizacijskega dokumenta HD
60364-1:2008. V primeru spora glede besedila slovenskega prevoda v tem standardu je odločilen
izvirni evropski harmonizacijski dokument v nemškem jeziku. Slovensko izdajo standarda je pripravil
tehnični odbor SIST/TC ELI Nizkonapetostne in komunikacijske električne inštalacije.
Odločitev za privzem tega harmonizacijskega dokumenta je dne 15. septembra 2008 sprejel tehnični
odbor SIST/TC ELI Nizkonapetostne in komunikacijske električne inštalacije.
ZVEZA S STANDARDI
S privzemom tega evropskega harmonizacijskega dokumenta veljajo za omenjeni namen referenčnih
standardov vsi standardi, navedeni v izvirniku, razen tistih, ki so že sprejeti v nacionalno
standardizacijo:
SIST HD 472 S1:2002 Nazivne napetosti za javna nizkonapetostna električna omrežja
SIST IEC 60038:2002 Standardne napetosti IEC
SIST IEC 60050-691:2000 Mednarodni elektrotehniški slovar – 691. del: Tarife za električno
energijo
SIST IEC 60050-826:2006 Mednarodni elektrotehniški slovar – 826. del: Električne inštalacije
SIST HD 384 (vsi deli) Nizkonapetostne električne inštalacije
SIST HD 60364 (vsi deli)
SIST IEC 60364 (vsi deli)
SIST EN 60445 Osnovna in varnostna načela za vmesnik človek-stroj, označevanje in
razpoznavanje – Razpoznavanje terminalov opreme in končnikov
določenih namenskih vodnikov, vključno s splošnimi pravili za
alfanumerični sistem (IEC 60445, spremenjen)
SIST EN 60446 Osnovna in varnostna načela za vmesnik človek-stroj, označevanje in
identifikacija – Identifikacija vodnikov z barvami ali številkami (IEC
60446)
SIST EN 60617 (vsi deli) Grafični simboli za sheme (IEC 60617)
SIST EN 60721 (vsi deli) Klasifikacija okoljskih pogojev (IEC 60721)

OSNOVA ZA IZDAJO STANDARDA
– privzem harmonizacijskega dokumenta HD 60364-1:2008
II

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SIST HD 60364-1: 2008
OPOMBA
– Nacionalni uvod in nacionalni predgovor nista sestavni del standarda.
– Povsod, kjer se v besedilu harmonizacijskega dokumenta uporablja izraz “evropski
harmonizacijski dokument”, v SIST HD 60364-1:2008 to pomeni “slovenski standard”.
– Ta nacionalni dokument je istoveten HD 60364-1:2008 in je objavljen z dovoljenjem
  CENELEC
  Avenue Marnix 17
  B-1050 Bruselj
  Belgija

– This national document is identical with HD 60364-1:2008 and is published with the permission of
CENELEC
 Avenue Marnix 17
 B-1050 Bruxelles
Belgium
III

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SIST HD 60364-1 : 2008











(Prazna stran)

IV

---------------------- Page: 4 ----------------------

HARMONIZACIJSKI DOKUMENT HD 60364-1
HARMONIZATION DOCUMENT
DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT avgust 2008

ICS 91.140.50   Nadomešča HD 384.1 S2:2001 in HD 384.3 S2:1995




Slovenska izdaja


Nizkonapetostne električne inštalacije –
1. del: Temeljna načela, splošne značilnosti, definicije

Low-voltage electrical installations Installations électriques à basse Errichten von Niederspannungs-
– Part 1: Fundamental principles, tension – Partie 1: Principes anlagen – Teil 1: Allgemeine
assessment of general fondamentaux, détermination des Grundsätze, Bestimmungen
characteristics, definitions caractéristiques générales, définitions allgemeiner Merkmale, Begriffe
(IEC 60364-1:2005, modified) (CEI 60364-1:2005, modifiée) (IEC 60364-1:2005, modifiziert)




Ta harmonizacijski dokument je CENELEC sprejel 1. maja 2008. Člani CENELEC morajo izpolnjevati
notranje predpise CEN/CENELEC, s katerim so predpisani pogoji za privzem harmonizacijskega
dokumenta na nacionalno raven.

Najnovejši seznami teh nacionalnih standardov z njihovimi bibliografskimi podatki se na zahtevo lahko
dobijo pri Centralnem sekretariatu ali katerem koli članu CENELEC.

Ta harmonizacijski dokument obstaja v treh izvirnih izdajah (angleški, francoski in nemški).

Člani CENELEC so nacionalne elektrotehniške komisije Avstrije, Belgije, Bolgarije, Cipra, Češke
republike, Danske, Estonije, Finske, Francije, Grčije, Irske, Islandije, Italije, Latvije, Litve, Luksemburga,
Madžarske, Malte, Nemčije, Nizozemske, Norveške, Poljske, Portugalske, Romunije, Slovaške,
Slovenije, Španije, Švedske, Švice in Združenega kraljestva.










CENELEC
Evropski komite za standardizacijo v elektrotehniki
European Committee for Electrotechnical Standardisation
Europäisches Komitee für Elektrotechnische Normung Comité Européen de Normalisation
Electrotechnique

Centralni sekretariat: Rue de Stassart 35, B-1050 Bruselj
© 2008 CENELEC Lastnice avtorskih pravic so vse države članice CENELEC.  Ref. št. HD 60364-1:2008 E

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SIST HD 60364-1 : 2008
Predgovor

Besedilo mednarodnega standarda IEC 60364-1:2005, ki ga je pripravil tehnični odbor IEC/TC 64,
Električne inštalacije in zaščita pred električnim udarom, skupaj s skupnimi spremembami, ki jih je
pripravil tehnični odbor CENELEC/TC 64, Električne inštalacije in zaščita pred električnim udarom, je
CENELEC 1. maja 2008 po formalnem glasovanju sprejel kot HD 60364-1.

Ta harmonizacijski dokument nadomešča HD 384.1 S2:2001 + HD 384.3 S2:1995.

Določeni so bili naslednji datumi:
– zadnji datum, do katerega je treba objaviti obstoj HD na nacionalni
ravni (doa)  2008-11-01
– zadnji datum, do katerega mora HD dobiti status
nacionalnega standarda bodisi z objavo istovetnega besedila
ali z razglasitvijo (dop)  2009-05-01
– zadnji datum, ko je treba razveljaviti nacionalne standarde
ki so s HD v nasprotju (dow)  2011-05-01

V tem harmonizacijskem dokumentu so skupne spremembe mednarodnega standarda označene z
navpično črto na levem robu besedila.

Dodatek ZA je dodal CENELEC.
2

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SIST HD 60364-1: 2008
VSEBINA Stran

11 Področje uporabe .5
12 Zveza s standardi .6
13 Temeljna načela .7
131 Zaščitni ukrepi .7
131.1 Splošno.7
131.2 Zaščita pred električnim udarom .7
131.2.1 Osnovna zaščita (zaščita pred neposrednim dotikom) .7
131.2.2 Zaščita ob okvari (zaščita pri posrednem dotiku).7
131.3 Zaščita pred toplotnimi učinki.8
131.4 Nadtokovna zaščita .8
131.5 Zaščita pri okvarnih tokih.8
131.6 Zaščita pred prenapetostmi in ukrepi proti elektromagnetnim vplivom.8
131.7 Zaščita pri prekinitvi napajanja.8
132 Načrtovanje .8
132.1 Splošno.8
132.2 Lastnosti napajanja ali napajanj, ki je (so) na voljo.9
132.3 Vrsta potrebe (po električni energiji).9
132.4 Električno varnostno napajanje ali rezervno napajanje.10
132.5 Okoljske razmere.10
132.6 Prerezi vodnikov.10
132.7 Vrste napeljave in načini vgradnje.10
132.8 Zaščitne naprave.10
132.9 Izklop v nuji.11
132.10 Odklopne naprave .11
132.11 Preprečevanje medsebojnih vplivov.11
132.12 Dostopnost električne opreme.11
132.13 Dokumentacija za električno inštalacijo.11
133 Izbira električne opreme .11
133.1 Splošno.11
133.2 Lastnosti .11
133.2.1 Napetost .11
133.2.2 Tok.11
133.2.3 Frekvenca.12
133.2.4 Faktor obremenitve .12
133.3 Razmere na mestu vgradnje .12
133.4 Preprečevanje škodljivih vplivov.12
134 Postavitev in preverjanje električne inštalacije.12
134.1 Postavitev .12
134.2 Prvo preverjanje .13
3

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SIST HD 60364-1 : 2008
134.3 Periodično preverjanje.13
20 Izrazi in definicije .13
30 Ocenjevanje splošnih značilnosti .13
31 Namembnost, napajanje in sestav električne inštalacije.13
311 Največja zahtevana moč in faktor sočasnosti .13
312 Razporeditev vodnikov in ozemljitev sistema.13
312.1 Tokovodeči vodniki glede na vrsto toka .13
312.1.1 Tokovodeči vodniki v izmeničnih tokokrogih .14
312.1.2 Razporeditev tokovodečih vodnikov v enosmernih tokokrogih .15
312.2 Vrste ozemljitve sistema.15
312.2.1 Sistemi TN.16
312.2.1.1 Sistemi z enojnim napajanjem.16
312.2.1.2 Sistemi z več napajanji.19
312.2.2 Sistemi TT .20
312.2.2.1 Sistemi z enojnim napajanjem.20
312.2.2.2 Sistemi z več napajanji .20
312.2.3 Sistem IT .22
312.2.4 Enosmerni sistemi .23
312.2.4.1 Sistem TN-S .23
312.2.4.2 Sistem TN-C.24
312.2.4.3 Sistem TN-C-S .25
312.2.4.4 Sistem TT .26
312.2.4.5 Sistem IT .27
313 Napajanja .28
313.1 Splošno.28
313.2 Varnostna in rezervna napajanja.28
314 Delitev inštalacije.28
32 Razvrstitev zunanjih vplivov .28
33 Združljivost .28
33.1 Združljivost lastnosti .28
33.2 Elektromagnetna združljivost .29
34 Primernost za vzdrževanje .29
35 Varnostno napajanje.29
35.1 Splošno.29
35.2 Razvrstitev.30
36 Neprekinjenost napajanja.30
Dodatek A (informativni): Primeri sistemov glede na vrsto ozemljitve .31
Dodatek B (informativni): Definicije – Navodila za uporabo in razlaga izbranih izrazov iz
IEC 60050-826 (IEV 826, Električne inštalacije).43
Dodatek ZA (informativni): A-deviacije.46
Bibliografija .47
4

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SIST HD 60364-1: 2008
1)
11 Področje uporabe

V HD 60364-1 so navedena pravila za načrtovanje, postavitev in preverjanje nizkonapetostnih
električnih inštalacij. Pravila so namenjena zagotavljanju varnosti ljudi, živali in imetja pred
nevarnostmi in poškodbami, ki lahko nastanejo ob normalni uporabi električnih inštalacij, ter
zagotavljanju neoporečnega delovanja teh inštalacij.

11.1 HD 60364-1 se uporablja za načrtovanje, postavitev in preverjanje električnih inštalacij, na primer v:
a) stanovanjskih objektih,
b) poslovnih objektih,
c) javnih objektih,
d) industrijskih objektih,
e) kmetijskih in vrtnarskih objektih,
f) montažnih zgradbah,
g) počitniških prikolicah, kampih in na podobnih površinah,
h) gradbiščih, razstaviščih, sejmiščih in drugih začasnih postavitvah,
i) marinah,
j) zunanji razsvetljavi in podobnih inštalacijah (glej tudi 11.3 e)),
k) medicinskih prostorih,
l) premičnih ali prevoznih enotah,
m) fotonapetostnih sistemih,
n) generatorjih nizke napetosti.

OPOMBA: "Objekt" zajema zemljišče z zgradbami in pripadajočimi napravami.

11.2 HD 60364-1 velja za:
a) tokokroge, napajane z napetostjo do vključno 1.000 V izmenično ali 1.500 V enosmerno.
Za izmenično napetost so v tem standardu upoštevane predvsem frekvence 50 Hz, 60 Hz
in 400 Hz. Za posebne namene se lahko uporabijo tudi druge frekvence;
b) tokokroge, razen tistih za notranje ožičenje aparatov, ki obratujejo pri napetostih, višjih od
1.000 V, in izvirajo iz inštalacije, katere napetost ne presega 1.000 V izmenično, npr.
obločne sijalke, elektrostatični sedimentatorji;
c) inštalacijske sisteme in kable, ki niso obravnavani v posebnih produktnih standardih;
d) vse porabniške inštalacije zunaj zgradb;
e) fiksne inštalacije za informacijsko in komunikacijsko tehnologijo, signalizacijo, krmiljenje in
podobno (razen za notranje ožičenje aparatov);
f) razširitev ali spremembo inštalacije in tudi za dele obstoječe inštalacije, na katere vpliva
razširitev ali sprememba.

OPOMBA: Določila standarda HD 60364-1 so namenjena za električne inštalacije na splošno; v nekaterih primerih pa se lahko
dopolnijo z zahtevami ali priporočili drugih standardov CENELEC (npr. za inštalacije v eksplozivni plinski atmosferi).

11.3 HD 60364-1 ne velja za:
a) opremo za električno vleko, vključno za vagone in signalno opremo,

1)
Način številčenja je razložen v dodatku A k IEC 60364-1:2005.
5

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SIST HD 60364-1 : 2008
b) električno opremo motornih vozil, razen tistih, ki so obravnavana v 7. delu,
c) električne inštalacije na ladjah ter premičnih in nepremičnih ploščadih,
d) električne inštalacije letal,
e) inštalacije javne ulične razsvetljave, ki so del javnega energetskega omrežja,
f) inštalacije v rudnikih in kamnolomih,
g) opremo za odpravljanje radijskih motenj, razen, kadar ta oprema lahko vpliva na varnost
inštalacije,
h) električne ograje,
i) zunanje sisteme zaščite zgradb pred delovanjem strele (LPS),
OPOMBA: HD 60364-1 zajema tudi atmosferske razelektritve, vendar le v smislu njihovega vpliva na
električne inštalacije (npr. glede na izbiro prenapetostnih zaščitnih naprav).
j) določene dele inštalacije dvigal,
k) električno opremo strojev.

11.4 HD 60364-1 ni namenjen za uporabo:
– v javnih sistemih za distribucijo električne energije ali
– za proizvodnjo in prenos energije v teh sistemih.

OPOMBA 1: Države lahko po želji standard v celoti ali delno uporabijo tudi v ta namen.
OPOMBA 2: Po standardu HD 637, ki podaja osnovna pravila za načrtovanje in izvedbo elektroenergetskih inštalacij v
sistemih z nazivno napetostjo nad 1 kV izmenično in nazivno frekvenco do vključno 60 Hz, morajo biti
nizkonapetostni zaščitni in nadzorni sistemi, izmenični in enosmerni, v skladu s standardi skupine HD 60364.

11.5 Električna oprema je zajeta le toliko, kolikor je to povezano z njeno izbiro in uporabo v inštalaciji.

To velja tudi za kombinacije električne opreme, ki so skladne z ustreznimi standardi.

12 Zveza s standardi

Pri uporabi tega dokumenta so nujno potrebni naslednji referenčni dokumenti. Pri datiranih
sklicevanjih velja le navedena izdaja dokumenta. Pri nedatiranih sklicevanjih se uporablja zadnja
izdaja publikacije (vključno z dopolnili).

EN/HD Leto Naslov IEC Leto
HD 472 S1 1989 Nazivne napetosti za javna nizkonapetostna IEC 60038 1983
2)
električna omrežja (mod)
 Mednarodni elektrotehniški slovar – IEC 60050-
691. del: Tarife za električno energijo 691
 Mednarodni elektrotehniški slovar – IEC 60050-
826. del: Električne inštalacije 826
HD 384 / Skupina Nizkonapetostne električne inštalacije IEC 60364 Skupina
HD 60364
EN 60445 Osnovna in varnostna načela za vmesnik človek- IEC 60445 2006
stroj, označevanje in razpoznavanje – (spremenjen)
Razpoznavanje terminalov opreme in končnikov
določenih namenskih vodnikov, vključno s
splošnimi pravili za alfanumerični sistem

2)
Naslov IEC 60038 je: ”Standardne napetosti IEC”.
6

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SIST HD 60364-1: 2008
EN/HD Leto Naslov IEC Leto
EN 60446 Osnovna in varnostna načela za vmesnik IEC 60446
človek-stroj, označevanje in identifikacija –
Identifikacija vodnikov z barvami ali številkami
 Grafični simboli za sheme IEC 60617
EN 60721 Skupina Klasifikacija okoljskih pogojev IEC 60721 Skupina

13 Temeljna načela

OPOMBA 1: Če države še nimajo nacionalnih predpisov za električne inštalacije, vendar pa se domneva, da je treba v ta namen
vpeljati ustrezno zakonodajo, je priporočljivo, da se take zahteve omejijo na temeljna načela, ki se zaradi tehničnega
razvoja ne spreminjajo pogosto. Vsebina 13. točke se lahko uporabi kot podlaga za takšno zakonodajo.

OPOMBA 2: Ta točka vsebuje osnovne zahteve, podrobnejše zahteve so lahko podane v drugih delih tega standarda.

131 Zaščitni ukrepi

131.1 Splošno

Zahteve v točkah 131.2 do 131.7 so namenjene za zagotavljanje varnosti ljudi, živali in imetja pred
nevarnostmi in poškodbami, ki lahko nastanejo pri normalni uporabi električnih inštalacij. Zahteve za
zagotavljanje varnosti živali se uporabljajo v prostorih, ki so jim namenjeni.

OPOMBA: V električnih inštalacijah se lahko pojavijo naslednje nevarnosti:
– tok udara,
– čezmerne temperature, ki lahko povzročijo opekline, ogenj in druge škodljive posledice,
– vžig potencionalne eksplozijske atmosfere,
– podnapetosti, prenapetosti in elektromagnetni vplivi, ki lahko povzročijo okvare ali škodo,
– prekinitve napajanja in/ali prekinitev varnostnega napajanja,
– električni oblok, ki lahko povzroči bleščanje, čezmerni tlak in/ali strupene pline,
– mehanično gibanje električne opreme.

131.2 Zaščita pred električnim udarom

131.2.1 Osnovna zaščita (zaščita pred neposrednim dotikom)

OPOMBA: Za nizkonapetostne inštalacije, sisteme in opremo je osnovna zaščita enaka zaščiti pred neposrednim dotikom.

Ljudje in živali morajo biti zaščiteni pred nevarnostmi, ki lahko nastanejo ob dotiku z deli pod
napetostjo električne inštalacije.

To zaščito je mogoče doseči z eno od naslednjih metod:
– s preprečitvijo, da bi tok tekel skozi telo človeka ali živali,
– z omejevanjem toka, ki bi lahko tekel skozi telo, na nenevarno vrednost.

131.2.2 Zaščita ob okvari (zaščita pri posrednem dotiku)

OPOMBA: Za nizkonapetostne inštalacije, sisteme in opremo je zaščita ob okvari enaka zaščiti pri posrednem dotiku, zlasti
v povezavi z okvaro osnovne izolacije.

Ljudje in živali morajo biti ob okvari zaščiteni pred nevarnostmi, ki bi lahko nastale zaradi dotika z
izpostavljenimi prevodnimi deli.

To zaščito je mogoče doseči z eno od naslednjih metod:
– s preprečitvijo, da bi tok kot posledica okvare sploh tekel skozi telo človeka ali živali;
7

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SIST HD 60364-1 : 2008
– z omejevanjem velikosti toka, ki je posledica okvare in bi lahko tekel skozi telo, na nenevarno
vrednost;
– z omejevanjem trajanja toka, ki je posledica okvare in bi lahko tekel skozi telo, na nenevarni čas.

131.3 Zaščita pred toplotnimi učinki

Električno inštalacijo je treba postaviti tako, da je verjetnost poškodb ali vžiga gorljivih materialov
zaradi visokih temperatur ali električnega obloka čim manjše. Poleg tega med normalnim
obratovanjem električne opreme ne sme biti prisotno tveganje opeklin za ljudi ali živali.

131.4 Nadtokovna zaščita

Ljudje in živali morajo biti zaščiteni pred poškodbami in imetje pred škodo zaradi čezmernih
temperatur ali elektromehanskih obremenitev, ki so posledica nadtokov, ki bi lahko tekli v vodnikih.

Zaščito je mogoče zagotoviti z omejevanjem nadtoka na varno vrednost ali varen čas trajanja.

131.5 Zaščita pri okvarnih tokih

Vodniki, razen vodnikov pod napetostjo, in vsi drugi deli, namenjeni za prevajanje okvarnega toka,
morajo biti sposobni prenesti ta tok, ne da bi se pri tem čezmerno segreli. Električna oprema, vključno
z vodniki, mora imeti mehansko zaščito pred elektromehanskimi obremenitvami zaradi okvarnih tokov,
da se preprečijo poškodbe na ljudeh in živalih ter škoda na imetju.

Vodniki pod napetostjo morajo biti zaščiteni pred nadtoki, ki so posledica okvar, v skladu s točko
131.4.

OPOMBA: Posebno pozornost je treba nameniti tokom skozi zaščitni vodnik (PE) in ozemljitveni vodnik.

131.6 Zaščita pred prenapetostmi in ukrepi proti elektromagnetnim vplivom

131.6.1 Ljudje in živali morajo biti zaščiteni pred poškodbami in imetje pred kakršnimi koli škodljivimi
učinki zaradi okvare med deli pod napetostjo tokokrogov, napajanih z različnimi napetostmi.

131.6.2 Ljudje in živali morajo biti zaščiteni pred poškodbami in imetje pred škodo zaradi
prenapetosti, ki nastanejo ob atmosferskih razelektritvah ali ob stikalnih operacijah.

OPOMBA: Za zaščito pred neposrednim udarom strele glej standarde iz skupine EN 62305.

131.6.3 Ljudje in živali morajo biti zaščiteni pred poškodbami in imetje pred škodo zaradi
podnapetosti in poznejšega ponovnega pojava napetosti.

131.6.4 Električna inštalacija mora imeti ustrezno raven odpornosti proti elektromagnetnim motnjam,
tako da je zagotovljeno nemoteno obratovanje v podanem
...