Article 398 focuses on which type of wiring?

Article 398 of the National Electrical Code specifically addresses Open Wiring on Insulators. This type of wiring involves electrical conductors that are supported by insulators on structures such as poles or other mounting surfaces, where the conductors are not enclosed within a cable or conduit. The purpose of this article is to provide safe practices and ensure that this type of wiring is installed correctly to prevent electrical hazards.

Open wiring on insulators is often used in overhead power lines and some outdoor applications, and it has specific guidelines regarding spacing, materials, and installation techniques to ensure safety and reliability. Understanding the principles outlined in Article 398 is critical for anyone involved in the installation and maintenance of such wiring systems, allowing them to comply with safety standards and ensure proper functioning.