What is true about aluminum conductors?

Aluminum conductors are known to exhibit higher resistance when oxidation occurs. When aluminum is exposed to air, it forms a layer of aluminum oxide on its surface. This oxide layer serves as an insulator and increases the electrical resistance of the aluminum conductor. Consequently, it can hinder the efficient flow of electricity, making it crucial for electricians and inspectors to understand this characteristic when working with aluminum wiring.

The increase in resistance due to oxidation is significant because it can lead to overheating and potential failure of electrical connections if not addressed properly. Therefore, precautions such as ensuring proper connections and using anti-oxidation compounds are often recommended when working with aluminum conductors to mitigate this issue.