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Aluminum Wiring
Installed in new homes built primarily in the 1960's and 1970's, aluminum electrical wiring was thought to be a cost effective replacement for copper wire. However, problems have developed in the connections between the wire and electrical outlets and switches which have resulted in house fires in some instances. Its important to know that the problems generally only involve the smaller, solid conductor branch wires that connect the electric panel with the outlets and light fixtures in your home. Larger multi-strand circuit wire to large appliances and the main service wires to the electric panel have not been a problem and are still commonly used today. Although much controversy surrounds this issue, there are only two alternatives to safely mitigate aluminum wiring in your home according to the Consumer Product Safety Commission. Replace the aluminum wire with copper or installing COPALUM connectors. Replacing the wire with copper can be difficult and is most often cost prohibited.
The COPALUM connector system attaches a copper wire to the old aluminum wires and is then crimped together with a power tool, achieving a "cold weld" between the conductors. The "cold weld" creates a permanent bond that eliminates electrical arcing or glowing connections and creates a safer electrical connection at outlets, switches, lights, circuit breakers, and panelboard terminals. The COPALUM connector repair materials and power crimping tools are only available from the TYCO AMP Certified provider. However, be aware that not all experts agree that this is an effective repair. Read the Aronson report (link at right) for more information.
Another alternative repair method involves pig tailing using the "Alumiconn" connector. This is a relatively new product, but early reports have indicated good results. The Alumiconn connector is a small plastic block with set screw terminals, and has been UL listed. This connector can be purchased online and at retail outlets. Care must be taken to tighten the terminal screws to manufacturers specifications.