What does the National Electrical Code (NEC) regulate?

The National Electrical Code (NEC) primarily regulates the installation of electrical wiring and equipment in the United States. This code is developed to ensure safe electrical practices and to reduce the risks associated with electrical hazards, such as shocks and fires. The NEC sets the standards for various aspects of electrical installations, including proper grounding, circuit protection, and the installation of outlets and fixtures, ensuring that electrical systems are designed and installed safely and efficiently.

The other options do not accurately reflect the scope of the NEC. Pricing of electrical materials is influenced by market conditions and is not addressed by the NEC. Similarly, the export of electrical appliances falls under international trade regulations and not the purview of electrical codes. The maintenance of electrical tools is typically governed by manufacturer guidelines and user practices rather than a national code. Therefore, the correct understanding is that the NEC's primary focus is on the safe installation and usage of electrical systems.