Abstract
Owing to the self-regulating heating cables installed to prevent freeze-up, hundreds of fires are reported annually. According to the Fire Statistical Yearbook of 2020, provided by the National Fire Agency of Korea, a total of 2,245 fires occurred due to seasonal equipment, of which 240 were caused by heating wires. It is reported that the fires due to the self-regulating heating cables are mainly caused by short circuit, heat storage, poor contact, and electric leakage. Herein, the possibility of ignition in self-regulating heating cables owing to overheating is investigated. Test samples were prepared according to the IEC 60738 standard, and the resistance characteristics and surface conditions were analyzed at varying temperatures. It was found that the self-temperature control function of these cables was lost at a specific temperature. In addition, the ignition of self-regulating heating cables was confirmed through a fire reproduction test at the experimental temperature.
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