What is the primary subject of Article 728?

Article 728 primarily addresses Fire-Resistive Cable Systems. This article outlines the requirements and standards pertaining to cables designed to remain operational during a fire event, ensuring safety and functionality in critical systems where continued power supply is necessary, such as for emergency lighting, alarm systems, and other vital equipment.

Understanding the specifications for fire-resistive cables is crucial for protecting life and property, particularly in commercial and industrial settings. It covers details such as cable construction, installation methods, and performance characteristics essential to maintaining operation under extreme conditions, which aligns with the overall objectives of fire safety and code compliance in electrical installations.