The employment of aluminum as a residential electrical conductor occurred primarily during the mid-1960s and the 1970s. A surge in copper prices at that time made aluminum an economically attractive alternative for wiring homes. This period represents the principal era of its widespread installation.
This shift to aluminum offered builders a cost-effective solution during a period of economic pressure. However, subsequent evaluations revealed potential safety concerns associated with the properties of aluminum wire in certain applications. Issues such as expansion and contraction leading to loose connections, galvanic corrosion with dissimilar metals, and the inherent properties of the metal itself prompted further scrutiny and revised installation practices.