NEC Article 300.21 emphasizes what kind of protection for conductors?

NEC Article 300.21 focuses on the need to ensure conductors are adequately protected from physical damage and environmental factors. This section highlights the importance of safeguarding conductors in locations where they may be exposed to situations that could cause harm, such as impacts, moisture, or corrosive elements.

The reasoning behind this emphasis is twofold. First, conductors that are not properly protected can sustain physical damage, leading to insulation failure, which could result in short circuits, fires, or electrocution hazards. Second, environmental factors such as moisture or corrosive substances can degrade conductor materials over time, compromising their integrity and operational reliability.

By mandating protective measures against these types of threats, NEC Article 300.21 helps ensure that electrical installations remain safe, reliable, and capable of functioning as intended over time.