Electrical evidence at fire scenes

This paper describes several of the different types of electrical phenomena that occur at a fire scene and how to preserve and analyze those phenomena. Topics include a description of the activities at the fire scene inspection and laboratory examinations to preserve data that is used for formulating opinions with regard to electrical matters. These include a discussion on photography, documentation, evidence collection, and examination results. Examples of common electrical and mechanical items with corresponding explanation are provided as an aid to properly interpreting the physical characteristics of the collected evidence so that the basis of opinions are founded upon generally understood scientific principles. Concepts are described such as arcing, melting, eutectic and chemical degradation of electrical conductors. Analysis and developing an opinion is covered with examples of how to present findings to a jury.