EN 14972-11:2023

SLOVENSKI STANDARD
01-september-2023
Vgrajeni gasilni sistemi - Sistemi s pršečo vodo - 11. del: Protokol preskušanja
sistemov z odprtimi šobami za kabelske hodnike
Fixed firefighting systems - Water mist systems - Part 11: Test protocol for cable tunnels
for open nozzle systems
Ortsfeste Brandbekämpfungsanlagen - Wassernebelsysteme - Teil 11: Prüfprotokoll für
Kabeltunnel für offene Düsensysteme
Installations fixes de lutte contre l'incendie - Systèmes à brouillard d'eau - Partie 11 :
Protocole d'essai des systèmes à buses ouvertes pour galeries de câbles
Ta slovenski standard je istoveten z: EN 14972-11:2023
ICS:
13.220.10 Gašenje požara Fire-fighting
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 14972-11
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2023
EUROPÄISCHE NORM
ICS 13.220.20
English Version
Fixed firefighting systems - Water mist systems - Part 11:
Test protocol for cable tunnels for open nozzle systems
Installations fixes de lutte contre l'incendie - Systèmes Ortsfeste Brandbekämpfungsanlagen -
à brouillard d'eau - Partie 11 : Protocole d'essai des Wassernebelsysteme - Teil 11: Prüfprotokoll für
systèmes à buses ouvertes pour galeries de câbles Kabeltunnel für offene Düsensysteme
This European Standard was approved by CEN on 17 April 2023.

CEN 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 CEN-CENELEC Management Centre or to any CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14972-11:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 5
5 Fuel packages . 6
5.1 General . 6
5.2 Tunnel enclosure . 7
5.3 Cable tray arrangement . 8
5.4 Cable fire load . 8
5.5 Conditioning of fire load . 9
5.6 Ignition source . 9
5.7 Ventilation conditions . 9
6 Test arrangement . 9
7 Test equipment requirements . 9
8 Instrumentation requirements .10
8.1 General .10
8.2 Temperature .10
8.3 Air velocity .10
8.4 Pressure .11
8.5 Time .11
9 Test criteria .11
9.1 General .11
9.2 Carrying out the test with automatic release system .12
9.3 Carrying out the test without automatic release system (manual release system) .12
9.4 Pass/fail criteria .12
10 Test report .12

European foreword
This document (EN 14972-11:2023) has been prepared by Technical Committee CEN/TC 191 “Fixed
firefighting systems”, the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2023, and conflicting national standards shall
be withdrawn at the latest by November 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
The EN 14972 series, published under the general title Fixed firefighting systems — Water mist systems,
consists of the following parts. This list includes standards that are in preparation, and other standards
can be added. For the current status of published standards, refer to www.cencenelec.eu.
— Part 1: Design, installation, inspection and maintenance;
— Part 2: Test protocol for shopping areas for automatic nozzle systems;
— Part 3: Test protocol for office, school classrooms and hotel for automatic nozzle systems;
— Part 4: Test protocol for non-storage occupancies for automatic nozzle systems;
— Part 5: Test protocol for car garages for automatic nozzle systems;
— Part 6: Test protocol for false floors and false ceilings for automatic nozzle systems;
— Part 7: Test protocol for commercial low hazard occupancies for automatic nozzle systems;
— Part 8: Test protocol for machinery in enclosures exceeding 260 m for open nozzle systems;
— Part 9: Test protocol for machinery in enclosures not exceeding 260 m for open nozzle systems;
— Part 10: Test protocol for atrium protection with sidewall nozzles for open nozzle systems;
— Part 11: Test protocol for cable tunnels for open nozzle systems;
— Part 12: Test protocol for commercial deep fat cooking fryers for open nozzle systems;
— Part 13: Test protocol for wet benches and other similar processing equipment for open nozzle systems;
— Part 14: Test protocol for combustion turbines in enclosures exceeding 260 m for open nozzle systems;
— Part 15: Test protocol for combustion turbines in enclosures not exceeding 260 m for open nozzle
systems;
— Part 16: Test protocol for industrial oil cookers for open nozzle systems;
— Part 17: Test protocol for residential occupancies for automatic nozzle systems.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
1 Scope
This document specifies fire testing requirements for water mist systems used for fire protection of cable
tunnels. The test protocol covers deluge water mist systems with open nozzles which are either activated
with an automatic release system, e.g. fire detection system, or manually released.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 13501-1:2018, Fire classification of construction products and building elements - Part 1: Classification
using data from reaction to fire tests
EN 14972-1:2020, Fixed firefighting systems - Water mist systems – Part 1: Design, installation, inspection
and maintenance
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 14972-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 General requirements
4.1 Up to a maximum of 5 nozzles used in the fire tests shall be kept for later verification.
4.2 The water mist system, operating without manual intervention, shall successfully complete all
described performance fire tests.
4.3 The fire load shall be taken from the conditioning area and arranged into the test area just before
conducting the test.
4.4 The water flow shall be shut-off 15 min after the activation. After turning off the system, no more
than small localized flamelets on a single tray and no smouldering are allowed and the fire damages shall
be recorded.
4.5 Prior to the testing, a layout of the water mist system to be tested shall be submitted for test
preparation purposes. This layout shall include any components required for the testing as well as the
full dimensioning (e.g. length of pipes, distances of nozzles, etc.).
4.6 System components, component locations, operating conditions and test enclosure details shall
remain unaltered throughout all of the fire tests for a given application.
4.7 All fire tests shall be conducted using the manufacturer instructions in regard to nozzle placement,
spray flux, and operating pressure. Sprays shall not be intermittent.
4.8 The water supply shall be capable of supplying a flow rate and pressure at the minimum operating
pressure and flow rate of the open nozzle as specified by the manufacturer. These parameters shall be
met based on the actual layout of the pipework installation as used in the test scenario.
4.9 The tests with the water mist system shall be conducted at maximum spacing and minimum
discharge conditions regarding water flow and pressure as specified by the manufacturer for this
application. The system shall be installed to achieve the maximum allowed time delay of water pressure
build-up of the system.
5 Fuel packages
5.1 General
The test assembly to be provided for the tests by the applicant shall comply with the following
specifications and figures.
The test scenario is based on a typical tunnel layout comprising the appropriate fire load in terms of
cabling.
The test assembly shall include the following elements:
a) test tunnel enclosure;
b) cable trays;
c) cables fire load;
d) ignition source;
e) ventilation.
Figure 1 shows an example of the test assembly in accordance with the requirements specified in this
clause.
Dimensions in millimetres
a) side view
b) top view
Key
a tray thermocouple (T)
b propane gas burner cable
c air flow: 1 m/s
Figure 1 — Minimum dimensions of fire test enclosure with arrangement of cable trays and
water mist nozzles
5.2 Tunnel enclosure
The maximum cable tunnel enclosure width and height (as specified by the manufacturer) shall be tested
meeting the minimum requirements described below.
The enclosure shall be constructe
...