I understand that telecoms wiring is subject to section 521.10.202 of BS7671:2018. Cat 5 ethernet cable is just as capable of causing entanglement of emergency service personnel as a mains power cable. I wanted to know if the tensile strength of the cable in question may be taken into consideration or if any provision is made for very light cable?  Some of the single core buffer fibre I am working with has the tensile capacity of sewing cotton and crumbles in fire.  Even very small metal clips do not offer the clamping force needed to support the vertical runs and I wanted to use some intumescent caulking.