Notes on the use of LSF Insulated Wires/Cables as per BS 7211/BS EN 50525-3-41 LSF Compound LSF Compound used in wires as per BS 7211/BS EN 50525-3-41 is Thermosetting Insulation suitable for operating temperature of 90 0 C, Type EI5 to BS EN 50363-5. PVC when burnt emits large quantities of dense black smoke and acid gas, and in addition to the debilitating effect of smoke and toxic fume inhalation, obscuration of fire safety exits delays or prevents escape. Improved PVC formulations producing less smoke and acid gas have been developed but still do not satisfy required emission levels. The demand therefore has been for materials to replace PVC which do not give off smoke and toxic fumes and do not contain halogens. The materials need to have the following characteristics:- a) Fire retardant and zero halogen b) Low emission of smoke, toxic fumes and acid gases during combustion c) Similar mechanical and electrical properties to PVC d) Acceptable process-ability e) Low additional cost Detailed properties of the above material are Halogen Content – Max 0.5% pH value –Minimum 4.3 Conductivity – maximum 10 micro Siemens/mm Comparison of Chemical Resistance Properties of LSF and PVC Properties PVC LSF Oxidation Resistance E E Heat Resistance G-E G Oil Resistance F P Low-Temperature Flexibility P-G F-G Weather, Sun Resistance G-E P Ozone Resistance E E Abration Resistance F-G F Electrical Properties F-G F Flame Resistance G E Nuclear Radiation Resistance F G Water Resistance F-G F Acid Resistance G-E G Alkali Resistance G-E G Aliphatic Hydrocarbons Resistance P P Aromatic Hydrocarbons Resistance P-F P Halogenated Hydrocarbons Resistance P-F P Alcohol Resistance P-F G Underground Burial P-G F-G Legend : E = Excellent, G = Good, P = Poor, F = Fair
4 MKXXS001-04/01-08-2015
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