A bimetal connection is used to join which types of cables?

A bimetal connection is specifically designed to join two different types of metals that have differing properties, especially in terms of conductivity and expansion rates. The most common and practical use of a bimetal connection is between copper and aluminum cables.

Copper and aluminum have distinct advantages and disadvantages: copper has better conductivity, while aluminum is lighter and often less expensive. Directly joining these two metals can lead to issues such as galvanic corrosion if not done properly; however, a bimetal connection mitigates this risk. It allows for a robust electrical connection that benefits from the strengths of both materials.

Using a bimetal connection specifically for copper to aluminum ensures compatibility with electrical standards and safety considerations in lightning protection systems. It prevents the potential issues that could come from directly joining dissimilar metals without the appropriate protective measures or materials.