Application of Secondary Short Circuit Fuse Mark in Fire Cause Investigation

Abstract

Metallographic analysis technology holds an important place in the fire material evidence identification, especially in the cause of the electrical fire scene investigation process, indispensable metallographic method, through the analysis of the microstructure of metal material evidence, can judge the melting properties of material evidence, namely the formation of physical evidence logic relationship with the occurrence of fire in time, Thus provide the most direct evidence for the fire scene investigation. There are many kinds of fusion marks extracted from fire scene, common ones are fire fusion mark, primary short circuit fusion mark, secondary short circuit fusion mark, etc. [1]. The relationship between the formation of secondary short circuit fuse mark and the electrical circuit is complicated, and its characteristics are different from those of fire fuse mark and primary short circuit fuse mark.