IEC 60332-1-3-2015 pdf download.Tests on electric and optical fibre cables under fire conditions – Part 1-3: Test for vertical flame propagation for a single insulated wire or cable – Procedure for determination of flaming droplets/particles.
This part of IEC 60332 specifies a test procedure for assessment of falling flaming droplets/ particles when a single vertical electrical insulated conductor or cable, or optical fibre cable, is subjected to defined fire conditions.
NOTE 1 Testing to IEC 60332-1 -3 may be performed simultaneously with that to IEC 60332-1 -2, if required.
Recommended requirements for performance are given in Annex A.
IEC 60332-1-3 specifies the use of a 1 kW pre-mixed flame and is for general use, except thatthe procedure specified may not be suitable for the testing of small single insulated conductors or cables of less than 0,5 mm 2 total cross-section because the conductor melts before the test is completed, or for the testing of small optical fibre cables because the cable is broken before the test is completed.
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.
IEC 60332-1 -1 , Tests on electric and optical fibre cables under fire conditions – Part 1-1: Test for vertical flame propagation for a single insulated wire or cable – Apparatus
IEC 6081 1 -203, Electric and optical fibre cables – Test methods for non-metallic materials – Part 203: General tests – Measurement of overall dimensions
IEC Guide 1 04, The preparation of safety publications and the use of basic safety publications and group safety publications
3 Terms and definitions
For the purposes of this document, the following terms and definitions, apply. Some definitions are taken from IEC 60695-4.
3.1 ignition source
source of energy that initiates combustion
3.2 flaming debris
matter flowing or separating from the specimen during the test procedure and falling below the initial lower edge of the specimen, continuing to flame as it falls, and igniting the filter paper beneath
4 Test apparatus
4.1 General
The apparatus specified in IEC 60332-1 -1 shall be used.
4.2 Ignition source
The ignition source shall comply with 4.3 of IEC 60332-1 -1 .
4.3 Filter paper
The filter paper shall consist of undyed cellulose filter paper of a density of (80 ± 1 5) g/m 2 with an ash content of less than 0,1 %. The filter paper shall be conditioned at (23 ± 2) °C for not less than 4 h at a relative humidity of (50 ± 1 0) %.
5 Procedure
5.1 Sample
The test sample shall be a piece of insulated conductor or cable (600 ± 25) mm long.
The test sample diameter shall be measured using the method given in IEC 6081 1 -203. The measurement shall be made at each of three places, separated by at least 1 00 mm.
The average of the three values obtained shall be rounded to obtain the overall diameter. If the calculation gives 5 or more for the second decimal figure, raise the first to the next number; thus, for example, 5,75 is rounded to 5,8. If the calculation gives 4 or less for the second decimal figure, maintain the first number; thus, for example, 5,74 is rounded to 5,7.
The overall diameter obtained shall be used for the selection of the time for flame application.
5.2 Conditioning
Before testing, all test pieces shall be conditioned at (23 ± 5) °C for not less than 1 6 h at a relative humidity of (50 ± 20) %.
In the case of an insulated conductor or cable with a finish of paint or lacquer, this conditioning shall follow an initial period where the test piece shall be kept at a temperature of (60 ± 2) °C for 4 h.IEC 60332-1-3 pdf download.