What is the proper installation rule for aluminum in wet environments?

When considering the proper installation of aluminum in wet environments, it's essential to understand the material's properties and how they interact with moisture. Aluminum's performance in such conditions hinges on its susceptibility to corrosion, particularly in the presence of moisture and electrolytes, which can lead to galvanic corrosion when aluminum is in contact with certain other metals.

The rule that aluminum must not come into contact with moisture is grounded in the understanding that, in wet environments, moisture can cause the aluminum to corrode over time, compromising its structural integrity and electrical conductivity. This makes it crucial to take appropriate measures to prevent direct exposure to moisture, ensuring the longevity and effectiveness of any aluminum components used in lightning protection systems or similar applications.

While other options might suggest different handling approaches, they do not convey the fundamental principle that unprotected aluminum should be kept dry to avoid deterioration and maintain performance. This highlights the importance of adhering to the guideline regarding moisture exposure to protect aluminum components in environmental conditions where water is present.