Arc fault circuits are used to interrupt the electrical arc that are present in the circuits, which may cause electrical fires. It distinguishes between a harmless arc that are normal operational ones, and dangerous ones that can occur in places where there is problem, like a cord which has a broken conductor. Those are mostly used in the residential bedrooms, according to the codes of Canada and the US. In the US, residential electrical fires are mostly happening because of the arc faults. Each year in the United States, over 40,000 fires are attributed to home electrical wiring. These fires result in over 350 deaths and over 1,400 injuries each year.