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Considerations
Aluminum wiring creates a greater resistance to electric current flow than copper. Consequently, if undersized, overheating can occur. Corrosion that develops from the contact of two dissimilar metals (aluminum wire to steel connector on old devices) or the natural oxidation of bare aluminum wire can also cause overheating. In addition, aluminum has a greater thermal expansion/contraction rate and less resiliency to bending than copper. This creates problems at connection points. As the wire expands and contracts with each use, the wire distorts and loosens, leading to sparking or overheating. The Schultz Property Inspection Technical Staff recommends that all aluminum household systems be periodically checked by an electrician and currently recommended remedial action should be taken where appropriate.
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