EN 50399:2011

Common test methods for cables under fire conditions - Heat release and smoke production measurement on cables during flame spread test - Test apparatus, procedures, results

EN 50399 specifies the apparatus and methods of test for the assessment of vertical flame spread, heat release, smoke production and occurrence of flaming droplets/particles of vertically-mounted bunched wires or cables, electrical or optical, under defined conditions. NOTE For the purpose of this standard the term "electric wire or cable" covers all insulated metallic conductor cables used for the conveyance of energy or signals. EN 50399 details the apparatus and the arrangement and calibration of the instrumentation to be installed in order to measure the heat release and the smoke production during the test. The combustion gases are collected in a hood above the test chamber and conveyed through an exhaust system, which allows the measurement of heat release rate and smoke production. Test procedures to be used for type approval testing for classification of cables in Euroclasses B1ca, B2ca, Cca and Dca are given. Cable installation on the test ladder and the volume of air passing through the chamber are in accordance with the Commission Decision 2006/751/EC [2] which is reflected in the requirements of this standard. The apparatus described in this standard shall be used in conjunction with that described in EN 60332 3 10.

Allgemeine Prüfverfahren für das Verhalten von Kabeln und isolierten Leitungen im Brandfall - Messung der Wärmefreisetzung und Raucherzeugung während der Prüfung der Flammenausbreitung - Prüfeinrichtung, Prüfverfahren und Prüfergebnis

Méthodes d'essai communes aux câbles soumis au feu - Mesure de la chaleur et de la fumée dégagées par les câbles au cours de l'essai de propagation de la flamme - Appareillage d'essai, procédure et résultats

Skupne preskusne metode za ognjevzdržnost kablov - Meritve oddajanja toplote in nastajanja dima na kablih med preskusom z razpršenim plamenom - Preskusna naprava, postopki, rezultati

EN 50399 določa naprave in preskusne metode za ocenjevanje navpičnega širjenja ognja, oddajanja toplote, nastajanja dima in pojava gorečih kapljic/delcev pri navpično pritrjenih snopih žic ali kablov, električnih ali optičnih, in pod določenimi pogoji.
OPOMBA: Za namene tega standarda izraz »električna žica ali kabel« zajema vse izolirane kovinske prevodniške kable, ki se uporabljajo za prenos energije ali signalov.
EN 50399 podrobno opisuje naprave in postavitev ter kalibracijo instrumentov, ki bodo vgrajeni zaradi merjenja oddajanja toplote in nastajanje dima med preskusom. Zgorevalni plini so zbrani v okrovu nad preskusno komoro in odvedeni skozi izpušni sistem, ki dopušča merjenje ravni oddajane toplote in nastanka dima. Podani so preskusni postopki, ki bodo uporabljeni za homologacijsko preskušanje za klasifikacijo kablov v evrorazrede B1ca, B2ca, Cca in Dca. Postavitev kablov na preskusni lestvi in volumen zraka, ki kroži skozi komoro, sta v skladu z Odločbo Komisije 2006/751/ES [2], ki se odraža v zahtevah tega standarda. Aparati, opisani v tem standardu, se uporabljajo skupaj s tistimi, opisanimi v EN 60332-10.

General Information

• Status: Published
• Publication Date: 14-Apr-2011
• Withdrawal Date: 27-Feb-2014
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 29.060.20 - Cables
• Technical Committee: CLC/TC 20 - Electric cables
• Drafting Committee: IEC/TC 20 - IEC_TC_20
• Parallel Committee: IEC/TC 20 - IEC_TC_20
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 15-Apr-2011
• Completion Date: 15-Apr-2011
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/443 - Mandate to CEN and CENELEC concerning the execution of standardisation work for harmonized standards on power, control and communication cables related to the following end uses: 24/33: Supply of electricity, 26/33: Communications, 28/33: Fire detection and alarm
• Ref Project: SIST EN 50399:2011 - Common test methods for cables under fire conditions - Heat release and smoke production measurement on cables during flame spread test - Test apparatus, procedures, results

Relations

• Replaced By: EN 50399:2022 - Common test methods for cables under fire conditions - Heat release and smoke production measurement on cables during flame spread test - Test apparatus, procedures, results
• Effective Date: 23-Jan-2023
• Amended By: EN 50399:2011/A1:2016 - Common test methods for cables under fire conditions - Heat release and smoke production measurement on cables during flame spread test - Test apparatus, procedures, results
• Effective Date: 23-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2011
Skupne preskusne metode za ognjevzdržnost kablov - Meritve oddajanja toplote in
nastajanja dima na kablih med preskusom z razpršenim plamenom - Preskusna
naprava, postopki, rezultati
Common test methods for cables under fire conditions - Heat release and smoke
production measurement on cables during flame spread test - Test apparatus,
procedures, results
Allgemeine Prüfverfahren für das Verhalten von Kabeln und isolierten Leitungen im
Brandfall - Messung der Wärmefreisetzung und Raucherzeugung während der Prüfung
der Flammenausbreitung - Prüfeinrichtung, Prüfverfahren und Prüfergebnis
Méthodes d'essai communes aux câbles soumis au feu - Mesure de la chaleur et de la
fumée dégagées par les câbles au cours de l'essai de propagation de la flamme -
Appareillage d'essai, procédure et résultats
Ta slovenski standard je istoveten z: EN 50399:2011
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
29.060.20 Kabli Cables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 50399
NORME EUROPÉENNE
April 2011
EUROPÄISCHE NORM
ICS 13.220.40; 29.060.20
English version
Common test methods for cables under fire conditions -
Heat release and smoke production measurement on cables during flame
spread test -
Test apparatus, procedures, results

Méthodes d'essai communes aux câbles Allgemeine Prüfverfahren für das
soumis au feu - Verhalten von Kabeln und isolierten
Mesure de la chaleur et de la fumée Leitungen im Brandfall -
dégagées par les câbles au cours de Messung der Wärmefreisetzung und
l'essai de propagation de la flamme - Raucherzeugung während der Prüfung
Appareillage d'essai, procédure et der Flammenausbreitung -
résultats Prüfeinrichtung, Prüfverfahren und
Prüfergebnis
This European Standard was approved by CENELEC on 2011-02-28. 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 50399:2011 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 50399 on
2011-02-28.
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) 2012-02-28

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-02-28
__________
– 3 – EN 50399:2011
Contents
Introduction . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Test apparatus . 8
4.1 General . 8
4.2 Air input . 9
4.3 Hood . 9
4.4 Exhaust duct. 10
4.5 Instrumentation in the exhaust duct . 10
4.6 Extracting ventilator . 11
4.7 Smoke production measuring equipment . 11
4.8 Combustion gas analysis equipment . 12
5 Qualification of test apparatus . 12
5.1 General . 12
5.2 Flow distribution measurements . 12
5.3 Sampling delay time measurement . 13
5.4 Commissioning calibrations . 13
5.5 Routine calibration . 13
6 Test procedure. 14
6.1 Initial test conditions . 14
6.2 Test sample . 14
6.3 Sample conditioning . 14
6.4 Determination of the number of test pieces . 15
6.5 Mounting of the test sample . 16
6.6 Exhaust volume flow . 17
6.7 Ignition source . 17
6.8 Flame application time . 17
6.9 Testing operations . 18
6.10 Observations and measurements during the test . 18
7 Determination of parameters derived from the test . 19
7.1 Calculation of HRR and SPR parameters . 19
7.2 Determination of extent of flame spread (FS) . 19
8 Test report . 20
8.1 General . 20
8.2 Contents . 20
Annex A (normative) Calculation of heat release . 31
A.1 Volume flow . 31
A.2 Generated heat effect . 31
A.3 Calculation of the mole fraction of water vapour in the air . 33
Annex B (normative) Smoke production . 34
Annex C (informative) Additional information on Reynolds number in Figure 5 . 35

Annex D (normative) Flow distribution inside the duct . 36
D.1 General . 36
D.2 Velocity profile factor k . 36
c
Annex E (normative) Commissioning calibrations . 39
E.1 General procedures for separate pieces of equipment . 39
E.2 Gas analyser calibrations . 39
E.3 HRR calibrations . 40
E.4 Smoke measurement system calibration . 44
Annex F (informative) Guidance for calibration procedures for specific measuring equipment . 47
F.1 General procedures for separate pieces of equipment . 47
F.2 Gas analyser calibrations . 47
F.3 Check of propane mass flow controller or rotameter . 47
F.4 Optical filter check for white light systems . 48
Annex G (normative) Calculation of HRR , SPR and FIGRA . 49
av av
G.1 Calculation of HRR . 49
av
G.2 Calculation of SPR . 50
av
G.3 Calculation of the Fire Growth Rate Index (FIGRA) . 50
Annex H (informative) Guidance on the choice of test equipment . 51
Annex I (informative) Guidance on the file format for data from the test . 52
Bibliography . 56

Figures
Figure 1 – General arrangement of test apparatus . 22
Figure 2 – Schematic of a hood . 23
Figure 3 – Typical guide vanes . 24
Figure 4 – Bidirectional probe . 25
Figure 5 – Probe response versus Reynolds number . 26
Figure 6 – Sampling probe . 27
Figure 7 – Schematic diagram of sampling line . 28
Figure 8 – Optical system – General arrangement . 29
Figure 9 – Mounting arrangement for Class B1 . 30
ca
Figure D.1 – Section of the exhaust duct – Positions for measurement of the gas velocity . 37
Figure E.1 – Overview of commissioning calibrations . 46

Tables
Table 1 – Mounting as a function of cable diameter . 17
Table E.1 – Burner ignition times and HRR levels .
...