oSIST prEN 13501-3:2019

Fire classification of construction products and building elements - Part 3: Classification using data from fire resistance tests on products and elements used in building service installations and electrical cables

This document specifies the procedure for classification of the resistance to fire performance of construction products and building elements used as components of building service installations, using data from fire resistance tests which are within the direct field of application of the relevant test method. Classification on the basis of extended application of test results is also included in the scope of this document.
Products/elements for use in ventilation systems include (excluding smoke and heat exhaust ventilation):
-   fire resisting ducts;
-   fire dampers.
Products /elements for use in/as cables systems:
-   Intrinsic fire resistant cables/unprotected cables;
-   Fire protective systems for cable systems;
-   Supporting /suspension devices;
-   Associated components (connectors, glands, junctions, etc.)
Relevant test methods which have been prepared for these products/elements are listed in Clause 2.

Klassifizierung von Bauprodukten und Bauarten zu ihrem Brandverhalten - Teil 3: Klassifizierung mit den Ergebnissen aus den Feuerwiderstandsprüfungen an Bauteilen von haustechnischen Anlagen und elektrischen Kabeln

Dieses Dokument legt das Verfahren zur Klassifizierung der Feuerwiderstandsfähigkeit von Bauprodukten und Bauteilen fest, die als Teil von haustechnischen Anlagen in Gebäuden benutzt werden. Dabei werden die Ergebnisse von Feuerwiderstandsprüfungen benutzt, die innerhalb des direkten Anwendungsbereichs des entsprechenden Prüfverfahrens liegen. Die Klassifizierung auf Basis des erweiterten Anwendungsbereiches von Versuchsergebnissen ist ebenfalls in diesem Dokument behandelt.
Bauprodukte/Bauteile zur Verwendung in Lüftungsanlagen (mit Ausnahme von Bauprodukten zur Rauch  und Wärmefreihaltung) beinhalten:
-   feuerwiderstandsfähige Leitungen;
-   Brandschutzklappen.
Produkte/Elemente zur Verwendung in/als Kabelsysteme(n):
-   tatsächlich feuerwiderstandsfähige Kabel/ungeschützte Kabel;
-   Feuerschutzsysteme für Kabelsysteme;
-   Stütz /Haltevorrichtungen;
-   zugehörige Komponenten (Anschlussstellen, Flansche, Verbindungsteile usw.)
Relevante Prüfverfahren, die für diese Bauprodukte/ teile entwickelt wurden, sind in Abschnitt 2 aufgeführt.

Classement au feu des produits et éléments de construction - Partie 3 : Classement utilisant des données d’essais de résistance au feu de produits et éléments utilisés dans des installations techniques et des installations de câbles électriques

Le présent document spécifie la méthode de classement de performance de résistance au feu des produits et des éléments de construction utilisés comme composants des installations techniques, à partir des données des essais de résistance au feu qui font partie du domaine d’application directe de la méthode d’essai correspondante. Le classement basé sur une application étendue des résultats d’essai est également inclus dans le domaine d’application du présent document.
Les produits/éléments pour utilisation dans les systèmes de ventilation comprennent (à l’exclusion des ventilateurs extracteurs de fumées et de chaleur) :
-   les conduits résistant au feu ;
-   les clapets résistant au feu.
Les produits/éléments pour utilisation dans les/en tant que systèmes de câbles :
-   les câbles à résistance au feu intrinsèque/câbles non protégés ;
-   les systèmes de protection au feu pour systèmes de câbles ;
-   les dispositifs de support/suspension ;
-   les composants associés (connecteurs, presse-étoupes, jonctions, etc.).
Les méthodes d’essai appropriées qui ont été préparées pour ces produits/éléments sont listées à l’Article 2.

Požarna klasifikacija gradbenih proizvodov in elementov stavb - 3. del: Klasifikacija na podlagi podatkov iz preskusov požarne odpornosti proizvodov in elementov servisnih inštalacij in električnih kablov v stavbah

General Information

• Status: Not Published
• Public Enquiry End Date: 19-Oct-2019
• ICS: 13.220.50 - Fire-resistance of building materials and elements
• ICS: 91.060.40 - Chimneys, shafts, ducts
• Technical Committee: POZ - Požarna varnost
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 26-Aug-2020
• Due Date: 31-Aug-2020
• Completion Date: 26-Aug-2020
• 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
• Mandate: M/117 - Horizontal complement to the mandates to CEN/CENELEC concerning the execution of standardization work for the valuation of construction products and elements in respect of their resistance to fire
• Ref Project: prEN 13501-3 - Fire classification of construction products and building elements - Part 3: Classification using data from fire resistance tests on products and elements used in building service installations and electrical cables

Relations

• Revised: SIST EN 13501-3:2006+A1:2009 - Fire classification of construction products and building elements - Part 3: Classification using data from fire resistance tests on products and elements used in building service installations: fire resisting ducts and fire dampers
• Effective Date: 01-Oct-2019

Overview

The oSIST prEN 13501-3:2019 standard, developed by CEN (European Committee for Standardization), specifies the procedure for fire classification of construction products and building elements used in building service installations and electrical cables. This document focuses on classification based on data obtained from fire resistance tests conducted within the direct field of application of the relevant test methods. It also covers classification using extended application of test results, ensuring harmonized and reliable assessment of fire resistance performance.

This standard is essential for improving fire safety in buildings by clearly defining measures and procedures for components such as fire-resisting ducts, fire dampers, intrinsic fire-resistant cables, support and suspension devices, and associated cable system components. It replaces the earlier EN 13501-3:2005+A1:2009 standard and aligns with the European Construction Products Regulation (305/2011).

Key Topics

• Scope of Classification:
  Covers fire resistance performance classification for building service installation components, including ventilation systems (fire resisting ducts, fire dampers) and cable systems (intrinsic fire resistant cables, fire protective systems, support devices, connectors, glands, junctions).

• Fire Resistance Performance Characteristics:
  Defines essential fire resistance parameters such as:

  • E (Integrity): Ability to prevent the passage of flames and hot gases.
  • I (Insulation): Capability to limit temperature rise on the non-fire side.
  • S (Smoke Leakage): Control of smoke passage through joints and openings.
  • P/PH (Continuity of Power/Signal Supply): Assurance of electrical circuit integrity during fire.

• Fire Scenarios and Thermal Exposure:
  Uses standardized temperature/time curves simulating post-flashover fires and constant high-temperature attack at 842°C to reflect realistic fire conditions during testing.

• Classification Procedure:
  Establishes a detailed process to classify fire resistance performance from direct fire resistance test results and allows for extended application reports to broaden classification scope based on relevant test data.

• Applicable Test Methods:
  References key test standards like EN 1366-1 (ventilation ducts), EN 1366-2 (fire dampers), EN 1366-11 (fire protective systems for cables), EN 50200, EN 50577 (electrical cables), and others ensuring comprehensive fire resistance assessment.

Applications

• Building Service Installations:
  The standard is critical for classifying fire protection products used in HVAC systems, including fire resisting ducts and dampers that help contain fire spread through ventilation routes.

• Electrical Cable Systems:
  Applies to intrinsic fire-resistant cables and fire protective systems designed to maintain power and communication signal integrity during a fire. It also includes supporting devices and cable accessories ensuring system safety and reliability.

• Safety Compliance and Regulation:
  Helps manufacturers, testing bodies, and regulatory authorities ensure construction products meet fire safety requirements for installation components under European regulations.

• Fire Safety Engineering:
  Assists architects and fire safety engineers to select appropriate products with certified fire resistance classes, enhancing building safety designs and risk mitigation strategies during fire incidents.

Related Standards

• prEN 13501 Series:

  • Part 1: Classification using reaction to fire tests.
  • Part 2: Classification excluding ventilation services.
  • Part 4: Classification for smoke control components.
  • Part 5: Classification using external fire exposure to roofs tests.
  • Part 6: Classification of power, control, and communication cables reaction to fire.

• EN 1366 Series:
  Fire resistance tests for various service installations such as ducts and fire dampers.

• EN 15725:
  Provides methodologies for extended application reports used for fire performance prediction.

• EN 50200, EN 50289-4-16, EN 50577:
  Test methods specifically addressing fire resistance and circuit integrity of electrical cables under fire conditions.

By adhering to oSIST prEN 13501-3:2019, stakeholders can achieve reliable fire resistance classification of critical building service products and electrical cables, thereby supporting fire safety regulations and improving overall building safety performance.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2019
Požarna klasifikacija gradbenih proizvodov in elementov stavb - 3. del:
Klasifikacija na podlagi podatkov iz preskusov požarne odpornosti proizvodov in
elementov servisnih inštalacij in električnih kablov v stavbah
Fire classification of construction products and building elements - Part 3: Classification
using data from fire resistance tests on products and elements used in building service
installations and electrical cables
Klassifizierung von Bauprodukten und Bauarten zu ihrem Brandverhalten - Teil 3:
Klassifizierung mit den Ergebnissen aus den Feuerwiderstandsprüfungen an Bauteilen
von haustechnischen Anlagen und elektrischen Kabeln
Classement au feu des produits et éléments de construction - Partie 3 : Classement
utilisant des données d’essais de résistance au feu de produits et éléments utilisés dans
des installations techniques et des installations de câbles électriques
Ta slovenski standard je istoveten z: prEN 13501-3
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
91.060.40 Dimniki, jaški, kanali Chimneys, shafts, ducts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2019
ICS 13.220.50 Will supersede EN 13501-3:2005+A1:2009
English Version
Fire classification of construction products and building
elements - Part 3: Classification using data from fire
resistance tests on products and elements used in building
service installations and electrical cables
Classement au feu des produits et éléments de Klassifizierung von Bauprodukten und Bauarten zu
construction - Partie 3 : Classement utilisant des ihrem Brandverhalten - Teil 3: Klassifizierung mit den
données d'essais de résistance au feu de produits et Ergebnissen aus den Feuerwiderstandsprüfungen an
éléments utilisés dans des installations techniques et Bauteilen von haustechnischen Anlagen und
des installations de câbles électriques elektrischen Kabeln
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 127.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13501-3:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Fire scenarios . 7
4.1 General . 7
4.2 The standard temperature/time curve (post flashover fire). 8
4.3 Constant temperature attack at 842°C . 8
5 Resistance to fire performance characteristics . 8
5.1 Performance characteristics . 8
5.1.1 Introduction . 8
5.1.2 E – Integrity . 8
5.1.3 I – Insulation . 9
5.1.4 S – Smoke leakage . 9
5.1.5 P-Continuity of power and/or signal supply . 9
5.1.6 PH - Continuity of power and/or signal supply . 9
6 Declaration of fire resistance performance . 9
6.1 Classification periods . 9
6.2 Designatory letters . 9
6.3 Declaration of performance . 10
6.4 Combinations of classes . 10
6.5 Presentation of classification . 11
6.6 Declaration of fire resistance classes in product specifications . 11
7 Classification procedure for fire resistance . 11
7.1 General . 11
7.1.1 Procedure. 11
7.1.2 General rules for deducing the number of fire resistance tests . 12
7.1.3 Field of application . 13
7.2 Classification . 13
7.2.1 General . 13
7.2.2 Ventilation ducts . 13
7.2.3 Fire dampers . 15
7.2.4 Failure of the suspension devices does not constitute failure of the test specimen
unless it leads to failure of either E or EI.Fire protective systems for cable systems
and associated components . 17
7.2.5 Unprotected electrical cable . 18
7.2.6 Unprotected small electrical cables . 19
Annex A (normative) Classification report . 20
A.1 General . 20
A.2 Content and format . 20
Bibliography . 24

European foreword
This document (prEN 13501-3:2019) has been prepared by Technical Committee CEN/TC 127 “Fire
safety in buildings”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13501-3:2005+A1: 2009.
This document has been prepared under a Mandate given to CEN by the Commission of the European
Communities and the European Free Trade Association.
CEN, CENELEC and EOTA committees preparing technical specifications which contain performance
requirements against fire resistance tests should make reference to the fire resistance classification
given in this document and not refer directly to any specific fire test method.
EN 13501 consists of the following parts:
— Part 1: Classification using data from reaction to fire tests,
— Part 2: Classification using data from fire resistance tests, excluding ventilation services,
— Part 3: Classification using data from fire resistance tests on products and elements used in building
service installations and electrical cables:,
— Part 4: Classification using data from fire resistance tests on components of smoke control systems,
— Part 5: Classification using data from external fire exposure to roofs tests.
— Part 6: Classification using data from, reaction to fire tests on power, control and communication
cables
Introduction
The aim of this document is to define a harmonized procedure for the classification for resistance to fire
of construction products and elements. This classification is based on the test procedures listed in
Clause 2 and the relevant field of application procedures.
This document is prepared in support of the second essential requirement in the EC Construction
Products Regulation (305/2011), which is detailed in the Interpretative Document number 2 (ID2):
Safety in case of fire (OJ C62 Vol 37). It reflects the Commission Decision (EU) 20XX/XXX of DD MM
20XX as regards the classification of the resistance to fire performance of construction products,
construction works and parts thereof.DD MM 20XX specify performance and classes regarding fire
resistance. These classes are identified by designation letters, each of which refers to an important
characteristic of fire resistance behaviour.
This document provides for a common understanding for these requirements. It interprets the
functional requirements for the different groups of building products and elements and explains the
method for deriving their classification on the basis of test results and/or extended application results
for individual products or elements.
NOTE Test reports constitute the basis for extended application reports as explained in EN 15725.
1 Scope
This document specifies the procedure for classification of the resistance to fire performance of
construction products and building elements used as components of building service installations, using
data from fire resistance tests which are within the direct field of application of the relevant test
method. Classification on the basis of extended application of test results is also included in the scope of
this document.
Products/elements for use in ventilation systems include (excluding smoke and heat exhaust
ventilation):
— fire resisting ducts;
— fire dampers.
Products /elements for use in/as cables systems:
— Intrinsic fire resistant cables/unprotected cables;
— Fire protective systems for cable systems;
— Supporting /suspension devices;
— Associated components (connectors, glands, junctions, etc.)
Relevant test methods which have been prepared for these products/elements are listed in Clause 2.
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 1366-1:2014, Fire resistance tests for service installations — Part 1: Ventilation ducts
EN 1366-2:2015, Fire resistance tests for service installations — Part 2: Fire dampers
EN 1366-11, Fire resistance tests for service installations — Part 11: Fire protective systems for cable
systems and associated components
EN 15725, Extended application reports on the fire performance of construction products and building
elements
EN 50200, Method of test for resistance to fire of unprotected small cables for use in emergency circuits
EN 50289-4-16, Communication cables — Specifications for test methods — Part 4-16: Environmental
test methods — Circuit integrity under fire conditions
EN 50577, Electric cables — Fire resistance test for unprotected electric cables (P classification)
EN 50582, Procedure to assess the circuit integrity of optical fibres in a cable under resistance to fire
testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
direct field of application
outcome of a process (involving the application of defined rules) whereby a test result is deemed to be
equally valid for variations in one or more of the product properties and/or intended end use
applications
3.2
extended field of application
outcome of a process (involving the application of defined rules that may incorporate calculation
procedures) that predicts, for a variation of a product property and/or its intended end use
application(s), a test result on the basis of one or more test results to the same test standard
3.3
test specimen
element (or part) of building construction provided for the purpose of determining either its fire
resistance or its contribution to the fire resistance of another building element
[SOURCE: EN 1363-1:2012]
Note 1 to entry: For the purposes of this document, this definition refers to a specific component of a service
installation.
3.4
fire resisting duct
duct used for the distribution or extraction of air and designed to provide a degree of fire resistance
Note 1 to entry: Fire resisting ducts may be subject to an additional classification S: smoke leakage.
[SOURCE: EN 1366-1:2014]
3.5
fire damper
mobile closure within a duct which is designed to prevent the passage of fire
Note 1 to entry: Fire dampers may be subject to an additional classification S: smoke leakage.
[SOURCE: EN 1366-2:2015]
3.6
extended application result
predicted result for performance parameter obtained following the process of extended field of
application
3.7
extended application report
document reporting extended application results, including all details of the process leading to those
results
Note 1 to entry: Extended application reports are prepared in accordance with EN 15725.
3.8
fire protective systems
heat insulating assembly of flexible or rigid materials inside which cables or cable systems are arranged
Note 1 to entry: The protective system may be ducts, shafts, conducts, trunkings, jacket enclosures or similar
systems.
3.9
electrical cables
power, control and communication cables, including optical fibre cables and hybrid cables which are a
combination of two or more of these cable types
3.10
small electrical cables
power, control and communication cables, including optical fibre cables and hybrid cables with an
overall diameter not exceeding 20 mm and with conductor size up to and including 2,5mm
Note 1 to entry: For optical cables only the 20 mm diameter limit applies
3.11
cable management system (CMS)
assembly including different system components intended for the accommodation of insulated
conductors, cables and possibly other electrical equipment in electrical and/or communication systems
4 Fire scenarios
4.1 General
Fire resistance shall be assessed using the thermal attack given in 4.2. The levels of thermal action given
in 4.2 and 4.3 reflect different fire scenarios and the standards which prescribe their translation into
practical tests give tolerances for their application.
NOTE Other heating curves can exist:
— ‘smouldering’ fire test is only used if the fire resistance performance of the product/element is
expected to be reduced by exposure to temperatures associated with the growth stage of a fire. It is, therefore,
particularly relevant to products/elements whose performance could be dependent upon high heating rates
below approximately 500 °C (as provided during the ‘standard temperature/time’ curve) for achievement of their
classifications (i.e. mainly reactive or intumescent products). Further details relating to the practical application of
this curve, and other test parameters, e.g. tolerances, are given in EN 1363-2;
— hydrocarbon curve is another example;
— also for extreme fire scenarios (e.g. traffic tunnels and nuclear plants), more severe conventional
curves can be specified. These are not, however, used for the classification of elements according to this document.
4.2 The standard temperature/time curve (post flashover fire)
When applied as a basis for testing, the standard temperature/time relationship shall be applied for the
full duration of the test. The relationship, which is a model of a fully developed fire in a compartment, is
given by the following relationship:
T 345 log 8t+ 1 + 20 (1)
( )
where
t is the time from the start of the test in minutes, and
T is the mean furnace temperature in °C.
Further details relating to the practical application of this curve, and other test parameters, e.g.
tolerances, are given in EN 1363-1.
4.3 Constant temperature attack at 842°C
In addition to the heating regime given in 4.2, the evaluation of small diameter unprotected electrical
cables made using a notional constant temperature attack is carried out by means of flame single
burner attack instead of furnace testing. The specified temperature and the rate at which the
temperature is reached, is specified in the relevant test method.
5 Resistance to fire performance characteristics
5.1 Performance characteristics
5.1.1 Introduction
5.1.2 to 5.1.4 describe which performance characteristics apply to which products/elements.
5.1.2 E – Integrity
Integrity E is the ability of a component of a service installation to prevent the transmission of fire as a
result of the passage of significant quantities of flames or hot gases from the fire to the unexposed side,
thereby causing ignition either of the non-fire exposed surface or of any material adjacent to that
surface.
The assessment of integrity is made on the basis of one or more of the following aspects simultaneously:
— cracks or openings in excess of given dimensions;
— ignition of a cotton pad;
— sustained flaming on the unexposed side;
— leakage in excess of given values.
The integrity shall be determined by all methods during the test. The cotton pad procedure shall be
applied until the pad ignites and, once it has ignited, it shall be withdrawn and the test continued until
all aspects have been exceeded (the sponsor has the option, however, of stopping the test once the
desired level has been reached). The times of each mode of integrity failure shall be recorded.
=
Classification of integrity is according to whether or not the component is also classified for insulation.
Where a component is classified both for integrity E and insulation I, the integrity value shall be that
determined by whichever of the four criteria fails first. Where a component is classified E but without
an I classification, failure of the cotton pad shall not be taken into account.
When testing fire dampers or fire resisting ducts against the slow heating curve (EN 1363-2), the
leakage criteria are applicable. However, the leakage rates measured during the first 25 min of the test
shall be disregarded.
For dampers, cracks or openings, ignition of cotton pad and sustained flaming on the unexposed side
shall be taken into account only for the area around the duct and wall or floor junction. The criterion
3 2
inside the duct containing the damper shall be the limitation of the leakage rate to 360 m /(m ⋅h) after
the first five minutes of exposure to the standard temperature/time curve.
5.1.3 I – Insulation
Insulation I is the ability of a component of a service installation to withstand fire exposure without the
transmission of fire as a result of significant transfer of heat. Transmission shall be limited so that
unexposed surfaces or any material in close proximity to those surfaces are not ignited. The component
shall also provide a barrier to heat, sufficient to protect people near to it.
5.1.4 S – Smoke leakage
Smoke leakage S is the ability of the component to resist the passage of gases or smoke at ambient
temperature and during exposure to the standard temperature/time test. The leakage rate is corrected
to 20 °C.
5.1.5 P-Continuity of power and/or signal supply
Continuity of power and/or signal supply P is the ability to provide such continuity under the
conditions of the standard temperature/time curve (see 4.2)
5.1.6 PH - Continuity of power and/or signal supply
Continuity of power and/or signal supply PH is the ability of a small electrical cables to maintain a
reliable form of power supply or signal from the source to the safety installation(s) when exposed to a
constant flame temperature attack of a notional 842°C (see 4.3)
6 Declaration of fire resistance performance
6.1 Classification periods
All classification periods against any of the characteristics shall be declared in minutes using one of the
periods 15, 20, 30, 45, 60, 90, 120, 180 or 240.
NOTE Not all periods apply to all components, and further subclauses show which classification periods
apply to which products/elements.
6.2 Designatory letters
For the classification of components of service installations, use shall be made of the designatory letters
explained in 5.1.
6.3 Declaration of performance
Combinations of these designatory letters, as appropriate, shall be used as part of the classification of
performance. They shall be supplemented by the time, in elapsed completed minutes of the nearest
lower class, during which the functional requirements are satisfied.
The classes shall be expressed as follows:
EI ttt (…) ttt being the classification period during which the criteria integrity and insulation
are satisfied;
E ttt (…) ttt being the classification period during which the criterion integrity is satisfied;
EI ttt (…) S ttt being the classification period during which the criteria integrity, insulation and
smoke leakage are satisfied;
E ttt (…) S ttt being the classification period during which the criteria integrity and smoke
leakage are satisfied.
Designatory letters within brackets shall include all information on the direction of exposure of the
specimen, as specified in 7.2.2.4 and 7.2.3.4.
Thus, the following classes may be defined:
EI 15 (…) S, E30 (…) S, E 60 (…).
The classes for ‘Fire protective systems for cable systems and associated components’ shall be
expressed as follows:
P tt tt being the classification period during which the criterion continuity of power and/or
signal supply is satisfied; (EN 1366-11),
The classes for unprotected electrical cables shall be expressed as either:
P ttt ttt being the classification period during which the criterion continuity of power and/or
signal supply is satisfied as defined either in EN 50577, TR50568, EN 50582 or EN 50289-4-
16,
Or
PH ttt being the classification period during which the criteria continuity of power and/or signal
ttt supply is satisfied as defined in EN 50200 or EN 50582 or EN 50289-4-16
Test results and extended application results shall always be rounded down to the nearest lower class.
When characteristics are combined, the time declared is that for the characteristic having the shortest
time.
6.4 Combinations of classes
Only those combinations of designatory letters and performance times explained in Clause 7 shall
...