What is the purpose of using coated versus uncoated copper conductors?

The use of coated copper conductors is primarily aimed at providing corrosion resistance. Copper, while an excellent conductor of electricity, is susceptible to oxidation and other forms of corrosion when exposed to the environment, particularly in humid or chemically active settings. The coating, which can be made from materials such as tin or nickel, effectively creates a barrier that protects the underlying copper from environmental factors that could lead to degradation.

This enhancement in durability means that coated conductors maintain their performance and reliability over time, especially in applications where exposure to moisture or corrosive agents is a concern. By mitigating the effects of corrosion, coated copper conductors can ensure more consistent electrical performance and longevity in various applications.

Coated conductors do not primarily reduce thermal conductivity. In fact, the coating can sometimes slightly alter thermal characteristics, but the primary goal is to prevent corrosion. While physical damage prevention is a benefit of having a coating, it is not the main purpose. Similarly, while coated conductors are designed to maintain good electrical conductivity, this characteristic is not inherently improved by the coating itself; rather, the coating serves to protect and preserve the existing conductivity of the copper.