What does NEC Article 300.20 specify about conductors?

NEC Article 300.20 is focused on the requirements for conductors and their installation in regard to their physical protection and the environmental conditions they must withstand. It specifically deals with the installation of conductors in a way that prevents damage from physical impacts and environmental factors.

The correct choice emphasizes the significance of protecting conductors from physical damage, which includes considerations such as the location of the conductors, the type of materials used for their protection, and ensuring that they are not subject to unnecessary strain or environmental hazards. This helps to maintain the integrity and safety of the electrical system.

While other options touch on related aspects of electrical installations, they do not accurately reflect the specific focus of NEC Article 300.20 on protection from physical damage and environmental impacts. The emphasis on the correct topic underlines the necessity of ensuring conductors are installed in a manner that reduces the risk of failure due to external conditions.