Can the cable on the mat be damaged if a ceramic tile is broken ?
It is unlikely that the cable will be damaged as there will be a layer of adhesive between the tile and the Devimat which will offer mechanical protection. The Devimat will be installed with the cable facing down. This will give the screened cable, which is already tough, additional protection. If there is any suspicion that damage may have occurred, the cable should be electrically tested.