Are crimp-style connections permitted for Class II installation of lightning protection?

In a Class II installation of lightning protection systems, crimp-style connections are generally not permitted due to safety and reliability concerns. Class II installations are typically subject to stricter guidelines and standards that prioritize the integrity and performance of the lightning protection system.

The primary objective of these installations is to ensure optimal conductivity and minimize the risk of failure during a lightning event. Crimp connections, while frequently used in various electrical applications, may not meet the necessary standards for mechanical and electrical reliability that are required in a Class II system. This can lead to potential points of failure that could compromise the overall effectiveness of lightning protection.

In contrast, options that suggest exceptions for crimp connections, such as only allowing them for copper or aluminum conductors, still do not align with the standard practices for Class II installations, where such connections must be avoided altogether. Therefore, the answer indicates that crimp-style connections are not permissible in this context.