BS7671:2018 (Jan 2019) 18th Edition requirements. Further changes effective from 1st January 2019 push the requirements for fore resistant cable fixings beyond escape routes to the complete installation. Regulation 521.10.202 "Requires cables to be adequately supported against their premature collapse in the event of a fire. This applies throughout the installation and not just in escape routes"
It also specifically prohibits the use of non-metallic clips, cable ties or plastic trunking as the sole means of support. "Where a non-metallic cable trunking is used, a suitable fire-resistant means of support must be provided to prevent cables falling and causing potentially fatal entanglements."
