Which Article addresses the use of overhead electrical conductors?

The correct choice is Article 399, which specifically covers the use of overhead electrical conductors. This article outlines the safety requirements, installation practices, and maintenance considerations for overhead conductors that distribute electrical power in open-air environments. Understanding this article is crucial for ensuring safety and compliance with electrical codes, as overhead conductors have unique challenges, including exposure to weather elements and the necessity for proper clearance from buildings and other structures. It addresses factors such as load-carrying capacity, conductor sizing, and protection against mechanical damage, all of which are essential for the effective and safe distribution of electricity overhead.

The other articles mentioned focus on different aspects of electrical installations; for example, Article 400 generally deals with flexible cords and cables, Article 402 primarily pertains to conductors that are installed underground, and Article 392 addresses cable trays. Each of these has its specific scope, which does not encompass the regulations and standards applicable to overhead conductors, highlighting why Article 399 is the relevant reference in this case.