Solar Booklets

www.siechem.com 53 IEC 60332-3 ( Flame Test on Bunched Wires/Cables ) IEC60332-3C describes a method of type approval testing to define the ability of bunched cables to resist fire propagation. In this test, a cable specimen, consisting of number of 3.5m lengths of cables are fixed to a vertical ladder tray where they are applied with a flame from a gas burner for a specified times under controlled air flow. Four categories (A, B, C & D) are defined and distinguished by test duration and the volume of non metallic material of the sample under test. The cable specimen is deemed to have met the requirements of the standard if, after burning has ceased, the extent of charred or affected portion does not reach a height exceeding 2.5m above the bottom edge of the burner. Wires & Cables IEC60754-1/BS6425- 1 Emission Of Halogens This specifies a test for determination of the amount of halogen acid gas, other than the hydrofluoric acid, evolved during combustion of compound based on halogenated polymers and compounds containing halogenated additives taken from cable constructions. Halogen includes Fluorine, Chlorine, Bromine, Iodine and Astatine. All these elements are toxic by its nature. The material is considered to be halogen free if no green to blue-green flame discolouration occurs. The chlorine and the bromine would cause such a discolouration, however the existence of fluorine cannot be proven like that. Halogen Test