IEC 60332-1-2-2004 pdf free download – Tests on electric and optical fibre cables under fire conditions – Part 1-2: Test for vertical flame propagation for a single insulated wire or cable – Procedure for 1 kW pre-mixed flame.
This part of lEC 60332 specifies the procedure for testing the resistance to vertical flamepropagation for a single vertical electrical insulated conductor or cable, or optical fibre cable,under fire conditions.The apparatus is given in lEC 60332-1-1.
NOTE1 Testing to lEC 60332-1-2 may be performed simultaneously with that to lEC 60332-1-3 if required.Recommended requirements for performance are given in Annex A.
IEC 60332-1-2 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 insulatedconductors or cables of less than 0,5 mm23 total cross-section because the conductor meltsbefore the test is completed, or for the testing of small optical fibre cables because the cableis broken before the test is completed. In these cases, the procedure given in lEC 60332-2-2is recommended.
NOTE 2 Since the use of insulated conductor or cable which retards flame propagation and complies with therecommended requirements of this standard is not sufficient by itself to prevent propagation of fire under allconditions of installation, it is recommended that wherever the risk of propagation is high， for example in longvertical runs of bunches of cables, special installation precautions should also be taken. lt cannot be assumed thatbecause the sample of cable complies with the performance requirements recommended in this standard,that abunch of cables will behave in a similar manner.(See IEC60332-3 series.)
2Normative 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 editionof the referenced document (including any amendments) applies.
IEC 60332-1-1,Tests on electric and optical fibre cables under fire conditions – Part 1-1:Testfor vertical flame propagation for a single insulated wire or cable – Apparatus
IEC 60695-4,Fire hazard testing -Part 4 : Terminology concerning fire tests
IEC Guide 104,The preparation of safety publications and the use of basic safety publicationsand group safety publications
3Terms and definitions
For the purposes of this document,the following terms and definitions apply.The definitionsare taken from lEC 60695-4.
3.1
ignition source
source of energy that initiates combustion[IEC 60695-4:1993,definition 2.76]
3.2
char
carbonaceous residue resulting from pyrolysis or incomplete combustion[IEC 60695-4:1993,definition 2.12]
4Test apparatus
The apparatus specified in lEC60332-1-1 shall be used.
5Procedure
5.1Sample
The test sample shall be a piece of single insulated conductor or cable (600 ± 25) mm long.5.2Conditioning
Before testing, all test pieces shall be conditioned at (23 ± 5)C for not less than 16 h at arelative humidity of (50 : 20)%.
ln the case of a single insulated conductor or cable with a finish of paint or lacquer，thisconditioning shall follow an initial period where the test piece shall be kept at a temperature of(60 ± 2) °C for 4 h.
5.3Positioning of test piece
The test piece shall straightened and be secured to two horizontal supports by means of asuitable size of copper wire，in a vertical position in the centre of the metal screen，asdescribed in 4.2 of iEc 60332-1-1,so that the distance between the bottom of the uppersupport and the top of the lower support is (550 ±5) mm. ln addition， the test piece shal bepositioned so that the bottom of the specimen is approximately 50 mm from the base of thescreen (see Figure 1).
The vertical axis of the test piece shall be arranged centrally within the screen (i.e.150 mmfrom each side and 225 mm from the rear).IEC 60332-1-2 pdf download.