What does the National Electric Code (NEC) pertain to?

The National Electric Code (NEC) specifically addresses the standards for electrical wiring and installations to ensure safety and proper functionality. It provides guidelines and regulations concerning the installation of electrical equipment, electrical systems, and the wiring methods used to maintain safe practices in residential, commercial, and industrial settings. By following these standards, professionals help prevent hazards such as electrical fires, shocks, and other dangerous conditions that can arise from improper electrical work.

While options regarding fire alarm systems, mechanical systems, and construction safety codes do relate to safety and building standards, they fall under different codes and regulations. Fire alarm systems have their specific guidelines often outlined in codes like the National Fire Protection Association (NFPA). Mechanical systems are addressed under different engineering and building standards. Construction safety codes generally pertain to overall construction practices and worker safety on job sites but do not exclusively cover electrical wiring. Thus, the focus of the NEC on electrical standards distinctly qualifies the second option as the correct response.