Between 1965 and 1973, aluminum wiring was used to install electrical branch circuits in about 1.5 million homes in the United States. The National Fire Protection Association and U.S. Consumer Products Safety Commission have found that homes using aluminum wires manufactured before 1972 are 55 times more likely to have one or more electrical connections reach “fire hazard” condition than homes wired with copper.
Aluminum wiring in itself is not dangerous. When properly installed, it can be just as safe as copper. But if it has not been installed properly, the connections—where the wires join to the outlets and switches—can present a fire hazard.
Click on the link to read about steps you can take to ensure the safety of the electrical connections in your home: Aluminum Electrical Wiring.