Fire rated goods are flame resistant / fire retardant and give some passive resistance but usually are not intumescent and do not grow when heated. These should be preferable for common building applications than regular merchandise that have no rating of any sort. FireCell is predicated on “Hub & Cluster” https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/