Final answer:
The minimum cross-sectional area of a solid, copper-clad aluminum conductor must contain 100% copper.
Step-by-step explanation:
The minimum cross-sectional area of the solid, copper-clad aluminum conductor must contain a minimum of 100% copper. This means that the entire cross-sectional area of the conductor must be made of copper, with no aluminum present.
For example, if the conductor has a total cross-sectional area of 10 mm², then the copper in the conductor must also have a cross-sectional area of 10 mm².
This ensures that the conductor has the desired electrical and thermal conductivity properties of copper, while benefiting from the lower cost and weight of aluminum.