BS EN 50200:2015 pdf download – Method of test for resistance to fire of unprotected small cables for use in emergency circuits
This European Standard is applicable to cables for emergency circuits of rated voltage not exceeding600 V/1 00o v, including those of rated voltage below 80 V and optical fibre cables.
This European Standard includes details for the specific point of failure,continuity checking arrangement,test sample, test procedure and test report relevant to electric power and control cables with rated voltage upto and including 600 v/1 000 v.Details for the specific point of failure, continuity checking arrangement, testsample, test procedure and test report relevant to copper data and telecom cables and optical cables aregiven in the relevant standards of CiLc/TC 46x and CLcTC 86A.
The test method is limited to cables with an overall diameter not exceeding 20 mm.
The test method is based on the direct impingement of flame from a propane burner giving a constanttemperature attack of a notional 842 °C. lt is intended to be used for cables for emergency circuits suitablefor alarm, emergency lighting and communication.
NOTE When the test method is used in support of EN 13501-3, it only applies to cables of less than 20 mmdiameter, and,for metallic conductor cables, to those with conductor sizes up to and including 2,5 mm2.For opticalcables, only the less than 20 mm diameter limit applies.
This European Standard includes(Annex B) the field of direct application and rules for extended applicationof test results (EXAP). Details regarding classification using data from this test are given in EN 13501-3 1).lnformation regarding classification is given in Annex D.
This European Standard also includes informative guidance (AnnexE) on a means of applying a water sprayto the cable during the test. Such a requirement may be a feature of particular product standards.
Normative references
The following documents，in whole or in part,are normatively referenced in this document and areindispensable for its application.For dated references, only the edition cited applies. For undated references,the latest edition of the referenced document (including any amendments)applies.
EN 13501-3, Fire classification of construction products and building elements – Part 3:Classification usingdata from fire resistance tests on products and elements used in building service installations: fire resistingducts and fire dampers
EN 60584-1,Thermocouples – Part 1: EMF specifications and tolerances (IEC 60584-1)
EN 60695-4，Fire hazard testing – Part 4:Terminology concerning fire tests for electrotechnical products(IEC 60695-4)
EN ISO 13943,Fire safety – Vocabulary (Iso 13943)
IEC 60269-3:2010 andlEC 60269-3:2010/A1:2013,Low-voltage fuses- Part 3: Supplementaryrequirements for fuses for use by unskilled persons (fuses mainly for household and similar applications) -Examples of standardized systems of fuses A to F
3Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 13943 and EN 60695-4 andthe following apply.
3.1
draught-free environment
space in which the results of tests are not significantly affected by the local air speed
4Test environment
The test shall be carried out in a draught-free environment within a suitable chamber,of minimum volume20 m3, with facilities for disposing of any noxious gases resulting from the burning. Sufficient ventilation shallbe available to sustain the flame for the duration of the test. Air inlets and the exhaust chimney should belocated in such a way that the burner flame remains stable during the verification procedure and test.lf necessary, the burner shall be shielded from any draughts by the use of draught shields. Windows may beinstalled in the walls of the chamber in order to observe the behaviour of the cable during the test. Fumeexhaust should be achieved by means of natural draught through a chimney located at least 1 m from theburner.A damper may be used for adjustment of ventilation conditions.
The same ventilation and shielding conditions shall be used in the chamber during both the verification andcable test procedures.
The chamber and test apparatus shall be at (25± 15)°℃ at the start of each test.
NOTE The test given in this European Standard may involve the use of dangerous voltages and temperatures.Suitable precautions should be taken against shock, burning, fire and explosion risks that may be involved and againstany noxious fumes that may be produced.
5Test apparatus
5.1Test equipment
The test equipment shall consist of the following:
a) a test wall, on to which the cable is mounted, comprising a board manufactured from heat resisting noncombustible material suitable for the temperatures invoived fastened to steel supports and mounted ona rigid support as described in 5.2;
b) a continuity checking arrangement as described in 5.3;
c)a source of heat comprising a horizontally mounted ribbon burner as described in 5.4;d)a shock producing device as described in 5.5;