Incorrectly installed aluminum wiring led to a poor connection and overheating of the switch, receptacle and terminal
When we took a look at the electrical wiring we saw that there was aluminum wiring that was installed incorrectly. As a result, it was reducing conductivity, overheating, and becoming dangerous.
Overheating is typically caused by the aluminum’s tendency to oxidize and its incompatibility with wiring devices that are not rated for aluminum wiring.
It also has a high degree of thermal expansion. This expansion and contraction at the termination point can cause it to loosen up over time.
Both the thermal expansion and oxidization result in higher resistance, and higher resistance results in increased heat and poorer electrical conductivity.