Understanding NEC Article 691: Large-Scale Photovoltaic (PV) Electric Supply Stations NEC Article 691 establishes the requirements for large-scale photovoltaic (PV) electric supply stations, often referred to as solar farms. These systems are designed to supply electricity to utility-operated grids and are characterized by their substantial size and operational complexity. Scope of Article 691 This article […]
Understanding NEC Article 665: Induction and Dielectric Heating Equipment NEC Article 665 provides safety standards for the construction and installation of induction and dielectric heating equipment. These systems are primarily used in industrial and scientific applications, with a focus on processes like heating, melting, and welding for metals and nonmetals. Scope of Article 665 This […]
Understanding NEC Article 660: X-Ray Equipment NEC Article 660 provides safety standards for the installation, operation, and maintenance of X-ray equipment used in industrial, laboratory, and nonmedical applications. These requirements address electrical safety, grounding, guarding, and the operation of equipment under high-voltage conditions. Scope of Article 660 This article applies to: Exclusions: Informational Notes: Key […]
