4 Core LSF SFX/4C-TY3-LSF-WHT-100. This Securi-Flex alarm cable is used for connecting alarm equipment such as sensors, control panels and other low voltage circuits. It is manufactured in accordance to BS4737-3.30:2015 and is supplied in 100 metre rolls.. Type 3 (TCCA Range). TCCA Conductors with colour coded PVC insulation and a choice of PVC or LSF outer jacket.. 4, 6, 8 an 12 core option. Screened available in 6 or 8 core options