Electrical wiring should be replaced every fifteen years, according to most experts. However, this doesn’t mean that the wiring system will fall apart right at the fifteen-year mark. In some cases, you might start getting problems with the system even before that. And in other cases, the wiring might be good to go on for a couple of more years. So, the best way to determine whether or not you need to replace the wiring is to test the system for its integrity. There are various methods to do this, which are beyond the scope of this article.