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The correct choice pertains to NEC Article 358, which specifically addresses the requirements for Electrical Metallic Tubing (EMT). This article outlines the materials, applications, installation methods, and other essential criteria for using EMT in electrical systems.

Understanding the significance of EMT in electrical installations is crucial. EMT is often favored due to its lightweight and robust nature, providing mechanical protection for conductors while being easier to work with compared to some other types of conduits. Article 358 ensures that the tubing meets the necessary standards for safety and performance, directing electricians on how to properly install and utilize this type of conduit in various environments.

The other articles listed cover different subjects: Article 340 deals with the requirements for Nonmetallic-Sheathed Cable, Article 520 covers entertainment and theatrical installations, and Article 600 pertains to the requirements for signs and outline lighting. Each article focuses on specific types of wiring and equipment, making Article 358 the sole article dedicated to EMT requirements. This understanding is paramount for electricians to ensure compliance and safety in their installations.