Through distributed fiber optic temperature sensing technology, fiber optic sensors can be installed along the cable trays to monitor temperature changes in real-time. It explains typical causes of fire, outlines technical and organisational solutions, and provides recommendations for installation. Through continuous, real-time temperature monitoring of power cables operators can detect incipient hotspots, reduce the risk early in order to prevent failures. It is a powerful tool for maintenance of critical power infrastructure. FTLD ™ provides complete coverage over large areas or long runs with a.