What is the minimum thickness required for protecting cable and raceways through wood members from penetration by screws and nails?

The minimum thickness required for protecting cables and raceways from penetration by screws and nails when passing through wood members is indeed 1.6 mm. This specific measurement is established to ensure adequate protection against potential damage that can occur if fasteners were to penetrate the wood and come into contact with the electrical components.

Using a thickness of 1.6 mm effectively provides a sufficient barrier, minimizing the risk of electrical shorts or failures caused by accidental penetrations. This requirement is rooted in safety standards designed to prevent hazards associated with electrical installations. Thinner materials may not provide the necessary durability and resistance, leading to higher risks during installation or over time as materials settle or shift.

In the context of the other options, while a thickness of 0.5 mm, 1.0 mm, and 2.0 mm are all reasonable figures, only 1.6 mm is explicitly specified as the mandatory minimum standard for protection against mechanical damage in many building codes and electrical safety guidelines.