HD 60364-5-52:2011
(Main)Low-voltage electrical installations - Part 5-52: Selection and erection of electrical equipment - Wiring systems
Low-voltage electrical installations - Part 5-52: Selection and erection of electrical equipment - Wiring systems
IEC 60364-5-52:2009 deals with the selection and erection of wiring systems. This third edition cancels and replaces the second edition, published in 2001, and constitutes a technical revision. The main changes with respect to the previous edition are as follows: - Subclause 521.4 introduces minor changes with regard to busbar trunking systems and powertrack systems. - Subclause 523.6 introduces minor changes with regard to the sizing of cables where harmonic currents are present. - A new sublause 523.9 concerning single-core cables with a metallic covering has been introduced. - Clause 525 introduces changes in the maximum value of voltage drop permitted between the origin of the consumer's installation and the equipment which should not be greater than that given in the relevant annex. - Clause 526 introduces minor changes to electrical connections including additional exceptions for inspection of connections and additional notes. - Clause 528 introduces additional requirements with regard to proximity of underground power and telecommunication cables. - Clause 529 introduces minor changes to selection and erection of wiring systems in relation to maintainability, including cleaning.
Errichten von Niederspannungsanlagen - Teil 5-52: Auswahl und Errichtung elektrischer Betriebsmittel - Kabel- und Leitungsanlagen
Installations électriques à basse-tension - Partie 5-52: Choix et mise en oeuvre des matériels électriques - Canalisations
La CEI 60364-5-52:2009 traite du choix et de la mise en oeuvre des canalisations. Cette troisième édition annule et remplace la deuxième édition, publiée en 2001. Elle constitue une révision technique. Les principaux changements par rapport à l'édition précédente sont les suivants: - Le paragraphe 521.4 apporte des changements mineurs aux canalisations préfabriquées et aux systèmes de conducteurs préfabriqués. - Le paragraphe 523.6 apporte des changements mineurs au dimensionnement des câbles en présence de courants harmoniques. - Un nouveau paragraphe 523.9 a été introduit; il concerne les câbles monoconducteurs à gaine métallique. - L'Article 525 insère des modifications de la valeur maximale de la chute de tension admissible entre l'origine de l'installation et l'équipement de l'utilisateur; il convient que celle-ci ne soit pas supérieure à celle donnée dans l'annexe correspondante. - L'Article 526 apporte des changements mineurs aux connexions électriques, y compris des restrictions relatives à la vérification des connexions et des notes complémentaires. - L'Article 528 introduit des exigences supplémentaires concernant le voisinage des câbles enterrés de réseaux d'énergie et de communications. - L'Article 529 apporte des changements mineurs au choix et à la mise en uvre des canalisations en fonction de la maintenance, comprenant le nettoyage.
Nizkonapetostne električne inštalacije - 5-52. del: Izbira in namestitev električne opreme - Inštalacijski sistemi
5-52. del IEC 60364 obravnava izbiro in namestitev inštalacijskih sistemov.
OPOMBA 1: Ta standard velja tudi na splošno za zaščitne prevodnike, medtem ko IEC 60364-5-54 vsebuje nadaljnje zahteve za te prevodnike.
OPOMBA 2: Vodilo o delu 5-52 IEC 60364 je navedeno v IEC 61200-52.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2011
1DGRPHãþD
SIST HD 384.5.52 S1:2000
SIST HD 384.5.52 S1:2000/A1:2000
SIST HD 384.5.523 S2:2002
1L]NRQDSHWRVWQHHOHNWULþQHLQãWDODFLMHGHO ,]ELUDLQQDPHVWLWHYHOHNWULþQH
RSUHPH,QãWDODFLMVNLVLVWHPL
Low-voltage electrical installations -- Part 5-52: Selection and erection of electrical
equipment - Wiring systems
Installations électriques à basse-tension -- Partie 5-52: Choix et mise en oeuvre des
matériels électriques - Canalisations
Ta slovenski standard je istoveten z: HD 60364-5-52:2011
ICS:
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
HARMONIZATION DOCUMENT
HD 60364-5-52
DOCUMENT D'HARMONISATION
February 2011
HARMONISIERUNGSDOKUMENT
ICS 13.260; 91.140.50 Supersedes HD 384.5.52 S1:1995 + A1:1998 + corr. Sep.1998, HD 384.5.523 S2:2001
English version
Low-voltage electrical installations -
Part 5-52: Selection and erection of electrical equipment -
Wiring systems
(IEC 60364-5-52:2009, modified + corrigendum Feb. 2011)
Installations électriques à basse-tension - Errichten von Niederspannungsanlagen -
Partie 5-52: Choix et mise en oeuvre des Teil 5-52: Auswahl und Errichtung
matériels électriques - elektrischer Betriebsmittel -
Canalisations Kabel- und Leitungsanlagen
(CEI 60364-5-52:2009, modifiée + (IEC 60364-5-52:2009, modifiziert +
corrigendum Feb. 2011) corrigendum Feb. 2011)
This Harmonization Document was approved by CENELEC on 2011-01-24. 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, Croatia, 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
Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. HD 60364-5-52:2011 E
Foreword
The text of the International Standard IEC 60364-5-52:2009, prepared by IEC TC 64, Electrical
installations and protection against electric shock, together with 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 60364-5-52 on 2011-01-24.
This European Standard supersedes HD 384.5.52 S1:1995 + A1:1998 and HD 384.5.523 S2:2001.
The main changes with respect to HD 384.5.52 S1:1995 + A1:1998 are as follows:
– Subclause 521.4 introduces minor changes with regard to busbar trunking systems and powertrack
systems.
– Subclause 523.6 introduces minor changes with regard to the sizing of cables where harmonic
currents are present.
– A new sublause 523.9 concerning single-core cables with a metallic covering has been introduced.
– Clause 525 introduces changes in the maximum value of voltage drop permitted between the origin of
the consumer's installation and the equipment which should not be greater than that given in the
relevant annex.
– Clause 526 introduces minor changes to electrical connections including additional exceptions for
inspection of connections and additional notes.
– Clause 528 introduces additional requirements with regard to proximity of underground power and
telecommunication cables.
– Clause 529 introduces minor changes to selection and erection of wiring systems in relation to
maintainability, including cleaning.
The following dates were fixed:
– latest date by which the existence of the HD
has to be announced at national level (doa) 2011-07-24
– latest date by which the HD has to be implemented
at national level by publication of a harmonized
national standard or by endorsement (dop) 2012-01-24
– latest date by which the national standards conflicting
with the HD have to be withdrawn (dow) 2014-01-24
__________
Endorsement notice
The text of the International Standard IEC 60364-5-52:2009 was approved by CENELEC as a
Harmonization Document with agreed common modifications as given below.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60332-3 series NOTE Harmonized in EN 60332-3 series (partially modified).
IEC 60332-3-24 NOTE Harmonized as EN 60332-3-24.
IEC 60364-4-43:2008 NOTE Harmonized as HD 60364-4-43:2010 (modified).
IEC 60364-5-51:2005 NOTE Harmonized as HD 60364-5-51:2009 (modified).
IEC 60364-7-715 NOTE Harmonized as HD 60364-7-715.
- 3 - HD 60364-5-52:2011
IEC 61000 series NOTE Harmonized in EN 61000 series (partially modified).
IEC 61386-24 NOTE Harmonized as EN 61386-24.
IEC 61535 NOTE Harmonized as EN 61535.
IEC 62305 series NOTE Harmonized in EN 62305 series (partially modified).
COMMON MODIFICATIONS
521.9.1
Add the following note:
NOTE Insulated flexible conductors or cores according to HD 516 may also be used as fixed installation.
528.2
Add the following new paragraph:
"In the case of proximity between cable distribution systems for radio and television signals and power
line systems, EN 50083 should be considered."
528.2
Add the following note:
NOTE For the connection of combined socket-outlets for telecommunication (also aerial) and power line systems, EN 41003 should
be considered.
Annex A - Table A.52.2 – Erection of wiring systems
Delete Table A.52.2.
Annex B - Table B52-18 – Current-carrying capacities
Table B.52.18, right column, line Number of circuits 16, change from 0.38 to 0.68.
Annex D - Formulae to express current-carrying capacities
Delete Annex D.
Add Annexes ZA to ZC below.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60228 - Conductors of insulated cables EN 60228 -
IEC 60287 Series Electric cables - Calculation of the current - -
rating
IEC 60287-2-1 - Electric cables - Calculation of the current - -
rating -
Part 2-1: Thermal resistance - Calculation of
thermal resistance
IEC 60287-3-1 - Electric cables - Calculation of the current - -
rating -
Part 3: Sections on operating conditions -
Section 1: Reference operating conditions and
selection of cable type
IEC 60332-1-1 - Tests on electric and optical fibre cables EN 60332-1-1 -
under fire conditions -
Part 1-1: Test for vertical flame propagation
for a single insulated wire or cable - Apparatus
IEC 60332-1-2 - Tests on electric and optical fibre cables EN 60332-1-2 -
under fire conditions -
Part 1-2: Test for vertical flame propagation
for a single insulated wire or cable -
Procedure for 1 kW pre-mixed flame
IEC 60364-1 (mod) 2005 Low-voltage electrical installations - HD 60364-1 2008
Part 1: Fundamental principles, assessment of
general characteristics, definitions
IEC 60364-4-41 2005 Low-voltage electrical installations - HD 60364-4-41 2007
(mod) Part 4-41: Protection for safety - Protection + corr. July 2007
against electric shock
IEC 60364-4-42 - Low voltage electrical installations - HD 60364-4-42 -
Part 4-42: Protection for safety - Protection
against thermal effects
IEC 60364-5-54 - Electrical installations of buildings - HD 60364-5-54 -
(mod) Part 5-54: Selection and erection of electrical
equipment - Earthing arrangements,
protective conductors and protective bonding
conductors
- 5 - HD 60364-5-52:2011
Publication Year Title EN/HD Year
IEC 60439-2 - Low-voltage switchgear and controlgear EN 60439-2 -
assemblies -
Part 2: Particular requirements for busbar
trunking systems (busways)
IEC 60449 - Voltage bands for electrical installations of HD 193 S2 -
buildings
IEC 60502 Series Power cables with extruded insulation and - -
their accessories for rated voltages from 1 kV
(Um = 1,2 kV) up to 30 kV (Um = 36 kV)
IEC 60529 - Degrees of protection provided by enclosures - -
(IP Code)
IEC 60570 (mod) - Electrical supply track systems for luminaires EN 60570 -
IEC 60702 Series Mineral insulated cables and their EN 60702 -
terminations with a rated voltage not
exceeding 750 V
IEC 60947-7 Series Low-voltage switchgear and controlgear - EN 60947-7 Series
Part 7: Ancillary equipment
IEC 60998 Series Connecting devices for low-voltage circuits EN 60998 Series
for household and similar purposes
IEC 61084 Series Cable trunking and ducting systems for - -
electrical installations
IEC 61386 Series Conduit systems for cable management EN 61386 Series
IEC 61534 Series Powertrack systems EN 61534 Series
IEC 61537 - Cable management - Cable tray systems and EN 61537 -
cable ladder systems
ISO 834 Series Fire-resistance tests - Elements of building - -
construction
Annex ZB
(normative)
Special national conditions
Special national condition: National characteristic or practice that cannot be changed even over a long
period, e.g. climatic conditions, electrical earthing conditions.
NOTE If it affects harmonization, it forms part of the Harmonization Document.
For the countries in which the relevant special national conditions apply these provisions are normative,
for other countries they are informative.
Country Clause Special national condition
In Norway the following additional requirements apply:
Norway 523.1
Special requirement may apply in Norway due to national building practice and
the extended use of insulation materials in building walls.
Germany
521.11 In Germany additional requirements apply (see annex to German Special
National Condition on Clause 521.x)
In Germany the following additional requirements apply:
521.12
"521.x Inherently short-circuit proof and inherently earth-fault-proof wiring
Where protective devices for the protection in case of short-circuit in
accordance with 473.2.2.1 of IEC 60364 are not used, cables and conductors
shall be laid inherently short-circuit proof and inherently earth-fault-proof.
The following types of wiring are regarded as inherently short-circuit proof and
inherently earth-fault proof:
a) Conductor arrangements where contact between the conductors and contact
with earthed parts are prevented and where no short-circuit is to be expected
due to external influences (e.g. falling parts);
b) Arrangement consisting of single-core cables, e.g. in accordance with
IEC 60502, single-core non-metallic -sheathed cables in accordance with
IEC 60227-4 or single-core rubber-insulated and sheathed flexible cables in
accordance with IEC 60245-4;
c) Cables and rubber-insulated and sheathed flexible cables laid so that they
are accessible but not in the vicinity of combustible materials and where the
risk of mechanical damage is prevented.
d) Conductor arrangement consisting of single-core non-sheathed cables of
suitable type of construction (e.g. special rubber-insulated cables in
1)
accordance with IEC 60XXX , rated voltage U /U at least 1,8/3 kV or
equivalent).
An arrangement of cables and insulated conductors which could burn out
without endangering their environment (e.g. cables in ground) is considered as
equivalent to inherently short-circuit proof and inherently earth-fault-proof wiring
with regard to safety."
1)
In preparation.
- 7 - HD 60364-5-52:2011
Country Clause Special national condition
521.13 In Germany the following additional requirements apply:
"521.13 Accessories
Boxes and enclosures for accessories, e.g. connecting boxes for housing
terminals, socket-outlets or switches shall comply with the requirements of
EN 60670.
Boxes and enclosures intended to be installed in concrete or in hollow walls,
shall have the following markings according to EN 60670-1 on the boxes and
enclosures or provided by the manufacturer on the smallest package unit or in
the instructions of the manufacturer
- for use in concrete: symbol 90 °C;
- for use in hollow walls: symbol H.
GP-enclosures according to EN 60670-24 (under preparation) are not allowed
to be installed in Germany.
Socket outlet-systems which accept the simultaneous connection of more than
one plug in the interface of one socket outlet are not allowed in Germany.
521.6 In Germany and the Netherlands in the case of basic-insulated conductors in
conduit systems, cable trunking systems and cable ducting systems, only the
conductors of one main circuit, including the auxiliary circuits associated with
this main circuit, may be laid in conduit or in single-channel trunking or in one
duct of a multi-channel trunking, except in electrical and enclosed operating
areas. The uncut conductors of several circuits may, however, be fed through
common through-run boxes.
Country Clause Special national condition
521.7
In Germany the following additional requirements are applicable:
under certain circumstances, for ease of installation, the conductor may be
Class 5 to EN 60228, in which case the designatory suffix under HD 361 is
given by "-K".
The use of a Class 5 conductor designated "-K" does not indicate that the cable
is suitable for repeated flexing.
Flexible cables or cords (except for those heavy duty types used as fixed
installations in temporary buildings) should not be used as fixed wiring unless
contained in an enclosure affording mechanical protection, except when used
as the final connection to fixed equipment. In which case they should be of, at
least, the 'ordinary' type.
Flexible cables or cords should not be placed under carpets or other floor
coverings, where there is
a) any risk of thermal insulating effects, leading to excessive temperature
rise (see 5.3.1, a));
b) any risk of damage due to furniture or equipment resting on them or traffic
passing over them.
When flexible cables are required for use outdoors, whether of temporary or
permanent usage, reference should be made to Table 2A and 2B of this HD to
determine their suitability for such usage.
PVC flexible cables or cords are unsuitable for permanent use outdoors. Neither
should those that have a temporary designation be used in that manner
outdoors in adverse conditions, e.g. at temperatures below those given in
Table 4A, column 11.
In the case of soft soldered joints or terminations the limiting temperature for the
conductor under short circuit conditions is reduced to 160 °C. Account of this
limitation should be taken in selecting and operating cables.
Tinned copper conductors should not be used at temperatures above 200 °C
because of the risk of mutual adhesion.
Where the limiting temperature given in Column 10 of Tables 3A, 3B, 4A and 4B
is such that the temperature of the surface of the cable is liable to exceed 50 °C,
the cable should be so located or guarded as to prevent contact of persons or
animals therewith. Cable surface temperatures above this can cause involuntary
reaction in the event of contact with exposed skin. Account should be taken of
these possibilities in the selection and use of cables.
527 In Germany, in cable tunnels, cable ducting and other places with increased
density of installed cables the installation of fire detectors sensitive to heat
radiation and smoke is required. In extended wiring system installations the
possibility to use mobile fire extinguishers is required. The use of a stationery
fire extinguisher installation is recommended in case of extended wiring
systems to which gaining access is difficult. In cable tunnels every 100 m a
partition as fire resisting section should be provided and every cable breaking
through should be sealed by a suitable and agreed fire resisting provision.
Accessible cable tunnels and ducts shall be erected with a sufficient number of
possibilities for gaining access in case of fighting a fire hazard, e.g. by easy
removable covers, and devices for smoke removal shall be provided. Where fire
protection seals with an automatic closing function and fire resisting capability
are applied such seals shall be activated at once in case of a fire hazard.
- 9 - HD 60364-5-52:2011
Country Clause Special national condition
522.4.1 In Germany, in hollow wall installations boxes and enclosures with a protection
degree not less than IP30 shall be used.
522.8.1.1 In Germany the following additional requirements apply:
Add the following text:
The tension applied to a cable should not exceed the values of tensile stress
per conductor given below. This is subject to a total maximum tensile force of
1 000 N unless otherwise agreed by the cable manufacturer.
50 N/mm² for non flexible cables during installation.
15 N/mm² for flexible cables, under static tensile stress and for non flexible
cables in service in fixed circuits.
In circumstances where a stress exceeding the above values would result, a
separate stress bearing member or device should be used. The method of
attaching such a member or device to the cable should be such that the cable is
not damaged.
In circumstances where flexible cables are under dynamic stress (including
those due to inertia, e.g. reeling drums) the permissible tensions or fatigue life
should be agreed between the design engineer and the cable manufacturer.
Cables which are installed vertically, without intermediate support, which are
inaccessible and unlikely to be moved or disturbed, should be supported at the
top of the run such that the internal radius of the resultant bend is not less than
the appropriate minimum bending radius for normal use according to Table 6(a),
or for fixed installation according to Tables 6(b) and 6(c). The unsupported
vertical length of such runs should not exceed 5 m.
The rated voltage of a cable is the reference voltage for which the cable is
designed and which serves to define the electrical tests.
The rated voltage is expressed by the combination of two values U /U,
o
expressed in volts:
U being the r.m.s. value between any insulated conductor and 'earth' (metal
o
covering of the cable or the surrounding medium);
U being the r.m.s. value between any two phase conductors of a multicore
cable or of a system of single core cables.
In an alternating current system, the rated voltage of a cable shall be at least
equal to the nominal voltage of the system for which it is intended. This
condition applies both to the value U and to the value U.
o
In a direct current system, the nominal voltage of the system shall be not higher
than 1,5 times the rated voltage of the cable.
NOTE The operating voltage of a system may permanently exceed the nominal voltage of such a
system by 10 %.
522.8.8 In Germany the standards DIN 18015-3 and DIN 1053-1 have to be considered.
Country Clause Special national condition
522.8.9 In Germany, in hollow wall installations boxes and enclosures with cable
retention shall be used
In Germany the following additional requirements apply:
522.8.10
“Cable laid in the ground shall be laid at least at 0,6 m below ground level but at
least 0,8 m below the carriageway of streets.
For smaller installation depths the cable shall be protected by other means, e.g.
wiring in suitable conduits."
523.3 In Germany in addition the 24 h load diagram has to be taken into consideration
527 In Germany there are specific requirements on fire protection in some areas.
527.2.4 In Germany 527.2.4 is not applicable.
527.2.5 In Germany, seals for cable penetrations shall be approved by the German
Institute for constructional engineering (Deutsches Institut für Bautechnik DIBT).
Annex A In Germany additional requirements apply (see annex to German Special
National Condition on Table A52-3)
Table
A.52.3
Annex D In Germany Annex D does not apply.
- 11 - HD 60364-5-52:2011
Country Clause Special national condition
In Germany the following additional requirements apply:
A) Wiring in concrete;
B) 1 cable and conductor.
The cables and conductors listed under a) to c) are permissible.
a) Aderleitungen single-core conductors, e.g. H07V…, in conduit.
The conduit for feeding through or joining single-core conductors, e.g. at the
intersection of wall and ceiling structural elements, shall be fed through in
insulating boxes according to DIN EN 60670 (VDE 0606)-series (some
countries note and SNC in CENELEC).
When using single-core cable it shall be ensured that the conduit and boxes
form an unbroken sealed system.
b) Sheathed conductors, e.g. NYM, according to DIN VDE 0250-204
(VDE 0250-204); in conduit or recess clearances.
c) Cables, e.g. NYY, according to DIN VDE 0276-603 (VDE 0276-603).
C) 2 Accessories
Boxes for appliances, appliance connection boxes, luminaire connection boxes
and junction boxes shall be suitable for installation in concrete. They shall
comply with DIN EN 60670 (VDE 0606) and shall be marked with the symbol B
according to DIN 30600 Reg. No. 1716.
D) Installation of cables in not accessible underground ducts and in protective
conduits burried in the ground
In not accessible underground ducts outside of buildings only cable or rubber-
sheathed cable NSSHÖU according to DIN VDE 0250-812 (VDE 0250-812),
trailing cables according to DIN VDE 0250-813 (VDE 0250-813) or similar types
shall be installed.
In protective conduits burried in the ground also sheathed conductors NYM
according to DIN VDE 0250-204 “(VDE 250-204) and plain lead-covered cable
DIN VDE 0250-210 (VDE 0250-210) are allowed, if the cables remain
accessible and exchangeable and the conduit is mechanically fixed, protected
against the ingress of water and ventilated.
NOTE This type of wiring should be restricted to exceptional cases and short distances, e.g. up to
5 m; the type of wiring according to 522.8.10 should be given preference.
Country Clause Special national condition
Annex ZB
In Germany the following additional requirements apply:
“Flat webbed house wires in accordance with DIN VDE 0250, Part 201 may be
used if the following requirements are met:
a) Flat webbed house wires according to DIN VDE 0250, Part 201 (NYIF.
NYIFY) may only be installed in dry rooms and only in or under plaster. They
shall be covered with plaster along their entire length.
NOTE 1 The use of flat webbed house wires may be restricted in special specifications.
NOTE 2 The insulation of cores in flat conductors is about half as thick as the insulation of single-
core conductors. The covering is primarily intended to maintain the distances between the cores in
order to ensure the permissible heat removal based on the maximum carrying current and the
additional mechanical protection of the conductor by the plaster covering. In general, this is ensured
by a crack-resistant plaster covering with a plaster thickness of about 4 mm.
b) If flat webbed house wires are installed in cavities in ceilings or walls
consisting of concrete, stone or similar non-combustible material, it is not
necessary to cover them with plaster in accordance with item a).
c) Even when covered with plaster, flat webbed house wires may not be laid on
combustible construction materials (see DIN 4102, Part 1), e.g. wood.
d) Flat webbed house wires shall not be bunched. Collecting flat webbed house
wires together at the inlet points of electrical equipment, e.g. distribution
boards, is not considered as bunching.
e) Flat webbed house wires may only be fixed using means and methods which
will ensure that the insulation is not damaged or deformed.
NOTE 3 Means for fixing without damage are, e.g. :
- gypsum plaster; or
- clamps matching the shape of the wires and made of insulating material or of metal with
insulating layer; or
- sticking; or
- nailing with suitable nails with insulating washers.
f) Flat webbed house wires shall not be installed under plaster board unless
these boards are attached entirely with plaster.
g) Flat webbed house wires shall not be installed immediately on or under wire
netting, metal mesh or similar.
h) Flat webbed house wires may only be joined in installation boxes in
accordance with DIN EN 60670-1 (VDE 0606-1) made of insulating material.
Netherlands
521.6 In Netherlands in the case of basic-insulated conductors in conduit systems,
cable trunking systems and cable ducting systems, only the conductors of one
main circuit, including the auxiliary circuits associated with this main circuit, may
be laid in conduit or in single-channel trunking or in one duct of a multi-channel
trunking, except in electrical and enclosed operating areas. The uncut
conductors of several circuits may, however, be fed through common through-
run boxes.
- 13 - HD 60364-5-52:2011
Country Clause Special national condition
Ireland
522.6.2 In Ireland concealed wiring must be protected against damage caused by
penetration by fixings and drills, by earthed metal enclosures or integral
screens, except in the following areas: 150 mm horizontally from a corner,
150 mm vertically from a ceiling, straight vertical or horizontal run to a point,
accessory or switchgear. In such cases, the wiring must be at least 50 mm from
the reverse side of the wall.
Country Clause Special national condition
Denmark
522.8.10 In Denmark the following applies: The requirements are not required for cables
with a rated voltage not exceeding 50 V ac or 120 V d.c. Cables shall be buried
at least 0,35 m under terrain. Cables buried less than 0,7 m under terrain shall
be protected by conduits, U-profiles or sheets. Cables buried more than 0,7 m
under terrain shall be without additional mechanical protection, when a marking
band is placed approximately 0,2 m above the cable. By more than one cable
with less than 0,2 m between the outer cables only one marking band is
required. Cables coming from the soil up in free air shall be mechanically
protected as well under the terrain as above the terrain.
NOTE Conduits or galvanized iron, steel or plastic conduits in accordance to DS 2119 for a working
pressure of 0,6 MPa can be used for protection.
528.1 In Denmark, the following requirement applies: Installations without connection
to the low-voltage installation and which are installed, supervised and
maintained by other than skilled persons shall be separated from the low-
voltage installations in a way that is possible to work on them without
dismantling the low-voltage installation.
Table In Denmark, the following applies – Where the current in a circuit of a group not
C52-3 exceeds 70 % of the current carrying capacity in accordance to Table C52-3
multiplied with an even correction factor for ambient temperature the following is
allowed:
The current carrying capacity for the circuit does not need to be multiplied
with a reduction factor for groups.
The circuit is not counted together with other circuits when numbers of
circuits are counted for determination of the reduction factor. Where the
current in all circuits in a group not exceeds 75 % of the current carrying
capacity in accordance with Table C52-3 multiplied with an even correction
factor for ambient temperature no further reduction is needed.
UK 522.6.4
In the UK, the following additional requirements apply:
1 A cable installed under a floor or above a ceiling shall be run in such a
position that it is not liable to be damaged by contact with the floor or the
ceiling or their fixings. A cable passing through a joist within a floor or ceiling
construction or through a ceiling support (e.g. under floorboards), shall:
(i) be at least 50 mm measured vertically from the top, or bottom as
appropriate, of the joist or batten; or
(ii) incorporate an earthed metallic covering which complies with the
requirements of Part 5-54 for a protective conductor of the circuit
concerned, the cable complying with BS 5467, BS 6346, BS 6724,
BS 7846, BS EN 60702-1 or BS 8436; or
(iii) be enclosed in earthed conduit complying with BS EN 61386 and satisfying
the requirements of Part 5-54 for a protective conductor; or
(iv) be enclosed in earthed trunking or ducting complying with BS EN 50085
and satisfying the requirements of Part 5-54 for a protective conductor; or
(v) be mechanically protected against damage sufficient to prevent penetration
of the cable by nails, screws and the like.
2 A cable concealed in a wall or partition at a depth of less than 50 mm from a
surface of the wall or partition shall:
(i) incorporate an earthed metallic covering which complies with the
requirements of Part 5-54 for a protective conductor of the circuit
concerned, the cable complying with BS 5467, BS 6346, BS 6724,
BS 7846, BS EN 60702-1 or BS 8436; or
(ii) be enclosed in earthed conduit complying with BS EN 61386 and satisfying
the requirements of Part 5-54 for a protective conductor; or
(iii) be enclosed in earthed trunking or ducting complying with BS EN 50085
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Country Clause Special national condition
and satisfying the requirements of Part 5-54 for a protective conductor; or
(iv) be mechanically protected against damage sufficient to prevent penetration
of the cable by nails, screws and the like; or
(v) be installed in a zone within 150 mm from the top of the wall or partition or
within 150 mm of an angle formed by two adjoining walls or partitions.
Where the cable is connected to a point, accessory or switchgear on any
surface of the wall or partition, the cable may be installed in a zone either
horizontally or vertically, to the point, accessory or switchgear. Where the
location of the accessory, point or switchgear can be determined form the
reverse side, a zone formed on one side of the wall of 100 mm thickness or
less or partition of 100 mm thickness or less extends to the reverse side.
3 Where Clause 2 above applies, and the installation is not intended to be
under the supervision of a skilled or instructed person, a cable installed in
accordance with part (v) of Clause 2 above, and not complying with part (i),
(ii), (iii), or (iv) of Clause 2 above, shall be provided with additional protection
by means of an RCD having the characteristics specified in Part 4-41, 415.1.
Irrespective of the depth of the cable from a surface of the wall or partition, in an
installation not intended to be under the supervision of a skilled or instructed
person, a cable concealed in a wall or partition the internal construction of which
includes metallic parts, other than fixings such as nails, screws and the like,
shall:
incorporate an earthed metallic covering which complies with the requirements
of Part 5-54 for a protective conductor of the circuit concerned, the cable
complying with BS 5467, BS 6346, BS 6724, BS 7846, BS EN 60702-1 or
BS 8436, or:
(ii) be enclosed in earthed conduit complying with BS EN 61386 and satisfying
the requirements of Part 5-54 for a protective conductor; or
(iii) be enclosed in earthed trunking or ducting complying with BS EN 50085
and satisfying the requirements of Part 5-54 for a protective conductor; or
(iv) be mechanically protected against damage sufficient to prevent penetration
of the cable by nails, screws and the like; or
(v) be provided with additional protection by means of an RCD having the
characteristics specified in Part 4-41, 415.1.
NOTE If the cable is installed at a depth of 50 mm or less from the surface of a wall or partition the
requirements of Clause 2 above also apply.
Switzerland 525 In Switzerland, (in accordance with National Legislation) a voltage drop not
exceeding 40 % is permitted in an installation between the connection point of a
building (main circuit breaker) and the final circuits, example – a socket outlet.
528.2 In Switzerland, in accordance with National Legislation Verordnung über
elektrische Leitungen 734.31… in case of crossing or proximity of underground
telecommunication cables and underground power cables, a minimum
clearance of 300 mm shall be maintained, or the requirements according to a)
or b) shall be fulfilled.
Belgium 527 In Belgium there are specific requirements on fire protection in some areas.
Italy 528.2 In Italy a minimum clearance of 300 mm shall be maintained
Country Clause Special national condition
IE
522.6 Wiring embedded in solid walls or concealed in hollow walls or partitions:
Wiring shall be protected by an earthed metal screen, armouring, metal conduit
or trunking against damage by impact or penetration by drills or nails except
where the following two conditions apply:
a) The distance measured horizontally between the wiring and the reverse
side of the wall is not less than 50 mm.
b) The wiring is installed:
1) in a straight vertical or horizontal run going directly to a point,
accessory or switchgear;
2) within a vertical distance of 150 mm from the ceiling;
3) within a horizontal distance of 150 mm from a corner formed by two
adjoining walls.
IE 522.8 In industrial and commercial premises, cables emerging from the floor shall be
provided with supplementary mechanical protection within a vertical distance of
1 250 mm from the floor.
During the period of construction, cables installed in pre-cast concrete floors
shall be provided with supplementary mechanical protection before further work
or activity is carried out.
During the period of construction, a cable emerging from the floor, and not fixed,
shall be protected against impact by suitable means such as flexible conduit.
IE 522.8.8 This does not apply to earthed metal-enclosed systems.
In attic spaces, care shall be taken to lay the wiring in an orderly manner and in
such a way as to minimize the risk of damage to wiring.
IE 522.8.10 Addition:
Suitable indication shall be provided above a buried cable at a distance of
approximately 300 mm vertically below the completed surface, or at half the
buried depth, whichever is the lesser.
Minimum depth mm of cables buried in the ground:
Table 52B − Minimum depth (mm) of cables buried in the ground
Location SWA or Non-armoured SWA or NYCY
NYCY cable cable in a pipe cable in high-
laid directly in the soil (1) impact
in the soil (2) resistant pipe
in the soil (1)
Agricultural 600 600 600
ndustrial and 450 450 250
commercial
Domestic 450 300 250
gardens, paths,
drives
Urban pathways 450 300 250
Vehicular traffic-750 750 750
bearing areas
Grass margins 600 600 600
(roadside) and
footpaths
Where cables buried in the ground are enclosed in ducting, of other than
concrete material, this ducting shall be coloured red and shall have a high
resistance to impact. For ducts or pipes of material other than concrete, e.g.
polythene, the minimum degree of resistance to impact shall be a 750 N load
rating for 5 % deflection in accordance with EN 50086-2-4.
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Country Clause Special national condition
IE 523.8 The following are exempt from this requirement:
Ͳ Parts of the route not exceeding 0,2 m in length;
Ͳ Parts of the route protected by conduit not exceeding 1 m in length.
IE 526.5 Wiring connections shall not be made inside trunking.
Connections made in suitable boxes located under floorboards are deemed to
be accessible.
In the case of conduit systems, connections shall be enclosed in suitable
inspection boxes forming part of the conduit system.
IE 526.7 Where the connections do not have a degree of protection against direct contact
of a least IP2X, the opening of doors or covers shall require the use of a key or
tool.
Unless it is suitably designed, a cable lug shall not be used to terminate more
than one conductor.
Adequate electrical conductance shall be provided between metal sheaths or
armouring of cables and the earthing terminals of equipment.
NOTE This requires proper design or a propriety method. For metal screens, the traditional
method of twisting the screen to facilitate the connection is permissible.
IE 526.10 Proximity to insulating materials:
Adequate clearance shall be maintained between connections to equipment and
adjacent metal layers of thermal insulation.
IE 528.1 No cable shall be run in a lift shaft unless it forms part of the lift installation.
ZB.1 Annex to German Special National Condition on Subclause 521.11
521.11 Cables and conductors
521.11.1 Cables
Cables NYY or NYCWY according to DIN VDE 0276-603 (VDE 0276-603):2010 should have the following
bending radii (see Part 5, Section 3G, Clause IV “Recommendation for use”, Table 3 “Instructions for
wiring”, line 4):
a) Permissible bending radius for wiring:
- single-core cables: 15fold cable diameter;
- multi-core cables: 12fold cable diameter.
b) Reduced bending radius by 50 % under the following conditions:
- single bending;
- proper wiring;
- heating the cable up to 30 °C;
- bending the cable over template.
The distance between fixing means should be (see Part 5, Section 5G, Clause IV “Recommendation for
use”, Table 3 “Instructions for wiring”, line 5.1 and 5.2):
Horizontal distance between fixing means: 20 times the cable diameter. These distances also
apply for supporting areas for wiring on cable racks, or
supporting structures. The distance shall not exceed
80 cm.
Vertical distance between fixing means: For vertical wiring along walls, the distances are
allowed to be longer. However, distances shall not
exceed 1,5 m.
521.11.2 Conductors
Conductors shall have in case of fixed installation the bending radii according to Table 01
(see DIN VDE 0298-300 (VDE 0298-300):2009-09):
Table 01 – Minimum permissible bending radius for fixed installation
Conductor diameter
mm
D ≤ 8 8 < D ≤ 12 12 < D ≤ 20 D > 20
Standard application 4 5 6 6
Conductors with rigid
conductors Careful bending 2 3 4 4
Fixed installation 3 3 4 4
Conductors with
flexible conductors Flexible application 4 4 5 6
NOTE 1 The minimum permissible bending radius corresponds to the internal radius.
NOTE 2 Specifications apply for a cable temperature of (20 ± 10) °C.
NOTE 3 D corresponds to the outer diameter for round conductors or the smaller external dimensions for flat conductors.
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The distance between fixing means should be according to Table 101 (see HD 516 S2):
Table 101 – Maximum distance between fixing means
Outer diameter of cables Maximum distance
mm
mm
Horizontal Vertical
D ≤ 9
250 400
9 < D ≤ 15
300 400
15 < D ≤ 20
350 450
20 < D ≤ 40 400 550
521.11.3 Sheathed Conductors (NYM)
These cables are intended for installation on, under and in plaster in dry, humid and wet rooms as well as
in masonry and concrete, except for direct embedding in heaped, shaked or tamped concrete. These
cables are also suitable for use in open air, provided that they are protected from direct exposure to sun
light.
Tables 52F and 52G apply for the installation of sheathed conductors with the following restriction:
Sheathed conductors DIN VDE 0250-210 (VDE 0250-210) and plain lead-covered cable NYBUY
according to DIN VDE 0250-204 (VDE 0250, Part 204) may be installed in underground protective conduit
if the cables remain accessible and exchangeable and the conduit is mechanically fixed, protected
against the ingress of liquids and ventilated.
NOTE This type of wiring should be restricted to exceptional cases and short distances, e.g. up to 5 m.
521.11.4 Installation of overhead span lines
Overhead span lines shall be attached and fixed so that sag or movement do not result in damage. The
specifications for overhead lines in DIN VDE 0211 are applicable to the height of span lines. The
specifications for overhead lines in DIN VDE 0211 (VDE 0211):1985-12 are applicable to the height of
span lines (e.g. for crossings of traffic installations:
Vertical distances of conductors
– from the carriageway 6 m
– from the conventional clearance profile of a waterway 2,5 m
If specific distances over the highest water-level for shipping are stipulated, these will apply.
– from the top of rail 7 m
– from the components of the overhead contact line system of a railway 3 m
– from the components of the overhead contact line system of a trolleybus or tramway 1,5 m
– from the components of a cable railway 3 m
It has to be considered that the highest point at crossings between suspension and hauling ropes shall be
determined, taking into account a 25 % higher maximum tensile stress of the suspension or hauling
ropes.
ZB.2 Annex to German Special National Condition on Table A.52-3
Table A.52-3 concerning the SNC about flat webbed house wires
xx Flat conductors direct in masonry C
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Annex ZC
(informative)
A-deviations
A-deviation: National deviation due to regulations, the alteration of which is for the time being outside the
competence of the CENELEC national member.
This Harmonization Document does not fall under any Directive of the EC.
In the relevant CENELEC countries these A-deviations are valid instead of the provisions of the
Harmonization Document until they have been removed.
Add the following A-deviations:
Country Clause Deviation
Germany 527 In Germany the following additional requirements apply:
According to the guideline on fire protection requirements for wiring systems
“Musterrichtlinie über brandschutztechnische Anford
...
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