What does Article 402 concern itself with?

Article 402 of the National Electrical Code primarily addresses flexible cords and cables, specifically focusing on their construction, use, and installation. This article outlines the requirements for various types of flexible cords, which are utilized in numerous applications, such as connecting portable equipment to a power source or providing temporary power to various devices.

The key aspects of Article 402 include specifications for the materials used, the permissible lengths, ampacity ratings, and the types of environments suitable for the use of flexible cords and cables. It emphasizes safety by ensuring that these cords are properly rated for their intended use and that they can withstand specific conditions such as moisture or temperature extremes.

Understanding the stipulations in Article 402 is crucial for ensuring that installations are compliant with safety standards and that they operate effectively without posing risks such as overheating or electrical hazards. This knowledge directly influences the reliable and safe operation of electrical systems in residential, commercial, and industrial settings, where flexibility in wiring is often necessary.