EN 50525-3-31:2011

SLOVENSKI STANDARD
01-september-2011
(OHNWULþQLNDEOL1L]NRQDSHWRVWQLHQHUJHWVNLNDEOL]QD]LYQRQDSHWRVWMRGR
YNOMXþQR988GHO.DEOLVSRVHEQLPLRJQMHYDUQLPLODVWQRVWPL
(QRåLOQLQHRSODãþHQLNDEOLVWHUPRSODVWLþQRL]RODFLMREUH]KDORJHQRYLQ]QL]NR
HPLVLMRGLPD
Electric cables - Low voltage energy cables of rated voltages up to and including 450/750
V (U0/U) - Part 3-31: Cables with special fire performance - Single core non-sheathed
cables with halogen-free thermoplastic insulation, and low emission of smoke
Kabel und Leitungen - Starkstromleitungen mit Nennspannungen bis 450/750 V (U0/U) -
Teil 3-31: Leitungen mit verbessertem Verhalten im Brandfall - Halogenfreie, raucharme
Ader- und Verdrahtungsleitungen mit thermoplastischer Isolierung
Câbles électriques - Câbles d’énergie basse tension de tension assignée au plus égale à
450/750 V (U0/U) - Partie 3-31: Câbles à performances spéciales au feu - Conducteurs
isolés en matériau thermoplastique sans halogène, à faible dégagement de fumée
Ta slovenski standard je istoveten z: EN 50525-3-31:2011
ICS:
29.060.20 Kabli Cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50525-3-31
NORME EUROPÉENNE
May 2011
EUROPÄISCHE NORM
ICS 29.060.20 Supersedes HD 21.15 S1:2006

English version
Electric cables -
Low voltage energy cables of rated voltages up to and including 450/750 V
(U /U) -
Part 3-31: Cables with special fire performance -
Single core non-sheathed cables with halogen-free thermoplastic
insulation, and low emission of smoke

Câbles électriques -  Kabel und Leitungen -
Câbles d’énergie basse tension de tension Starkstromleitungen mit Nennspannungen
assignée au plus égale à 450/750 V bis 450/750 V (U /U) -
(U /U) - Teil 3-31: Starkstromleitungen mit
Partie 3-31: Câbles à performances verbessertem Verhalten im Brandfall -
spéciales au feu - Halogenfreie, raucharme Ader- und
Conducteurs isolés en matériau Verdrahtungsleitungen mit
thermoplastique sans halogène, à faible thermoplastischer Isolierung
dégagement de fumée
This European Standard was approved by CENELEC on 2011-01-17. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

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

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

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. EN 50525-3-31:2011 E
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 20, Electric
cables.
The text of the draft was submitted to the formal vote and was approved by CENELEC as
EN 50525-3-31 on 2011-01-17.
This document, which is one of a multipart series, supersedes HD 21.15 S1:2006.

Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any
or all such patent rights.
The following dates were fixed:

– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2012-01-17

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-01-17

____________
- 3 - EN 50525-3-31:2011
Contents
Page
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 General purpose cables . 5
4.1 Cables for fixed wiring – H07Z1-U and H07Z1-R (Type 1 and Type 2) . 5
4.2 Cables for fixed wiring – H07Z1-K (Type 1 and Type 2). 6
4.3 Cables for internal wiring – H05Z1-U and H05Z1-R . 7
4.4 Cables for internal wiring – H05Z1-K . 7
Annex A (normative) Tests for cables to EN 50525-3-31 . 9
Annex B (normative) General data . 10
Bibliography . 13

Tables
Table A.1 . 9
Table B.1 . 10
Table B.2 . 11
Table B.3 . 11
Table B.4 . 12

1 Scope
EN 50525-3-31 applies to non-sheathed single core cables insulated with halogen-free
thermoplastic compound and having low emission of smoke and corrosive gases when
exposed to fire.
NOTE 1  Low emission of smoke is checked in accordance with EN 61034-2. Low emission of
corrosive gases is checked as part of the check for absence of halogens (see Annex B of EN 50525-1).
The cables are of rated voltages U /U up to and including 450/750 V.
NOTE 2  Cables rated 450/750 V may be used at 600/1 000 V when this cable is used in fixed installations with
mechanical protection, within switchgear and control gear - see HD 516.
For cables rated at 450/750 V there are two types, Type 1 and Type 2. Type 2 cables are
required to meet a more severe test for resistance to flame propagation (EN 60332-3-24)
than Type 1, and have particular suitability for installation in bunches (see also HD 516).
The cables are intended for fixed wiring applications.
The maximum conductor operating temperature for each of the cables in this standard is
70 °C.
NOTE 3  HD 516 contains extensive guidance on the safe use of cables in this standard.
This EN 50525-3-31 should be read in conjunction with EN 50525-1, which specifies general
requirements.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.

NOTE  One or more references to the standards below are in respect of a specific sub-division of that standard,
for instance a clause, a table, a class or a type. Cross-references to these standards are undated and, at all times,
the latest version applies.
EN 50363-7 Insulating, sheathing and covering materials for low voltage energy
cables - Part 7: Halogen-free, thermoplastic insulating compounds
EN 50395 Electrical test methods for low voltage energy cables
EN 50396 Non electrical test methods for low voltage energy cables
EN 50525-1 Electric cables - Low voltage energy cables of rated voltages up to
and including 450/750 V (U /U) - Part 1: General requirements
EN 60228 Conductors of insulated cables (IEC 60228)
EN 60332-1-2 Tests on electric and optical fibre cables 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 60332-1-2)
EN 60332-3-24 Tests on electric and optical fibre cables under fire conditions -
Part 3-24: Test for vertical flame spread of vertically-mounted
bunched wires or cables - Category C (IEC 60332-3-24)
EN 60811-1-4 Insulating and sheathing materials of electric and optical cables -
Common test methods - Part 1-4: General application - Tests at low
temperature (IEC 60811-1-4)
EN 61034-2 Measurement of smoke density of cables burning under defined
conditions - Part 2: Test procedure and requirements
(IEC 61034-2)
- 5 - EN 50525-3-31:2011
3 Terms and definitions
For the purposes of this document the terms and definitions given in Clause 3 of EN 50525-1
apply, together with the following.
3.1
type 1 cable
cable meeting the requirements for resistance to flame spread as given in EN 60332-1-2
3.2
type 2 cable
cable meeting the require
...