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In the realm of electrical wiring, the choice of materials plays a crucial role in ensuring safety, efficiency, and longevity of the electrical system. While aluminium is a widely used material in various industries, it is not commonly employed in household wiring. This raises the question: Why are aluminium wires not used in house?

1. **Conductivity and Resistance**: One of the primary reasons aluminium wires are not preferred for household use is their lower conductivity compared to copper wires. Aluminium has higher electrical resistance, which can lead to increased heat generation and energy loss in the wiring system. This inefficiency can result in higher electricity bills and potential safety hazards.

2. **Oxidation and Corrosion**: Aluminium is more prone to oxidation and corrosion when exposed to air and moisture. This can lead to the formation of a layer of oxide on the surface of the wire, which increases resistance and hinders the flow of electricity. In contrast, copper is more resistant to oxidation, making it a more reliable choice for residential wiring.

3. **Compatibility and Connections**: Another factor that limits the use of aluminium wires in households is their compatibility with electrical devices and connections. Aluminium has different expansion and contraction properties compared to copper, which can lead to loosening of connections over time. This can result in overheating, arcing, and potential fire hazards.

4. **Safety Concerns**: Aluminium wiring has been associated with safety concerns, especially in older homes where it was commonly used in the 1960s and 1970s. Issues such as overheating, melting of insulation, and increased risk of electrical fires have been reported with aluminium wiring, prompting many homeowners to opt for copper rewiring.

5. **Regulatory Standards**: In many regions, building codes and regulatory standards recommend or mandate the use of copper wiring for residential applications due to its proven track record of safety and reliability. These standards are in place to ensure the well-being of occupants and the longevity of the electrical system in a household setting.

In conclusion, while aluminium is a cost-effective and lightweight material, its limitations in terms of conductivity, oxidation, compatibility, safety, and regulatory standards make it less suitable for household wiring compared to copper. When it comes to ensuring a safe and efficient electrical system in your home, opting for copper wiring remains the preferred choice.

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