Which article discusses sensitive electronic equipment?

The correct choice is Article 647, which specifically addresses the requirements for sensitive electronic equipment. This article outlines the standards necessary for maintaining the performance and safety of equipment that can be adversely affected by electrical disturbances, such as voltage fluctuations, electromagnetic interference, and other environmental factors.

Article 647 emphasizes the importance of creating suitable installation environments for sensitive electronics, focusing on minimizing electrical noise and ensuring proper grounding practices. These guidelines help protect equipment like computers, telecommunications systems, and other electronic devices that require stable operating conditions to function correctly.

The other articles mentioned deal with different topics. Article 668 relates to the installation of surge protective devices, Article 650 focuses on the installation of systems for protection against lightning, and Article 626 covers electric vehicle charging systems. While these articles are essential to their respective topics, they do not specifically target the concerns addressed in Article 647 regarding sensitive electronic equipment.