Aluminum wires can be used instead of copper wires in certain applications, but there are some important considerations to keep in mind.
In the past, aluminum wiring was used in residential and commercial installations due to its lower cost compared to copper. However, there were issues with aluminum wiring, especially in residential settings. The main problem was that aluminum wires had a higher tendency to expand and contract with temperature changes, leading to loosening connections. This, in turn, caused overheating, potential fire hazards, and an increased risk of electrical failures.
To address these issues, electrical codes and standards were updated, and copper wiring became the preferred choice for most electrical installations, particularly in homes and small appliances. Copper has excellent conductivity and is more resistant to temperature-related expansion and contraction, making it safer and more reliable in most situations.
For larger appliances like refrigerators and washing machines, the use of copper wiring is generally the standard due to safety and performance considerations. The electrical loads and potential heat generated by these appliances make the robustness and thermal conductivity of copper wiring more suitable.
That said, there are cases where aluminum wiring is still used, particularly in large industrial applications or in specific electrical components where its properties are advantageous. If you encounter an appliance with aluminum wiring, it's essential to ensure that it complies with local electrical codes and has undergone appropriate safety testing.
However, for household appliances like refrigerators and washing machines, it's highly unlikely that aluminum wiring is used in modern models. If you have any concerns about the wiring in your appliances, it's always best to consult a qualified electrician for a thorough assessment and, if needed, appropriate replacements or repairs.