Brand Schneider Electric - page 50

Cables and wires running in walls are usually damaged during renovation and finishing works that require drilling holes. In old electrical installations, such faults can occur spontaneously due to natural wear and poor quality of old components. A burnt electrical wire in the wall is a big problem - especially if it is difficult to determine the exact place where the cable has broken. We suggest how to detect where the electrical cable has burned and what to do in such a situation.