The 2017 edition of the National Electrical Code (NEC), developed by the National Fire Protection Association (NFPA), focuses on the practical safeguarding of people and property from electrical hazards. The Code is not intended as a design specification or instruction manual for untrained individuals but provides the necessary guidelines to ensure safe electrical installations. The NEC covers a wide range of topics, including the installation and removal of electrical conductors, equipment, raceways, and communication systems. It is applicable to various settings such as public and private buildings, mobile homes, recreational vehicles, and industrial substations.
The NEC specifies that compliance with its provisions ensures safety but may not necessarily guarantee efficiency or convenience for future electrical expansions. It highlights the importance of proper initial installations and reasonable provisions for future changes to accommodate increased electrical usage. The Code is divided into chapters that address general rules, special occupancies, equipment, conditions, and communication systems, with annexes providing additional informational context.
While the NEC is advisory, it is widely used for legal and regulatory purposes to protect life and property. Local authorities have the jurisdiction to interpret and enforce the Code, allowing them to grant exceptions or approve alternative methods that achieve equivalent safety objectives. Additionally, the NEC encourages the use of updated products and technologies that comply with recognized standards to enhance electrical safety and performance.
