The answer to 'which is better aluminum wiring or copper wiring' is that copper wiring is generally considered better than aluminum wiring for residential electrical systems. Copper is a more conductive material, which means it can carry more electricity with less resistance and heat buildup. This makes copper wiring safer and more reliable than aluminum wiring.
Aluminum wiring was used in some homes built in the 1960s and 1970s as a cost-saving measure, but it has since been found to be more prone to issues like loose connections, overheating, and increased fire risk. Copper wiring is the standard for modern residential electrical systems and is recommended by electrical safety experts.