Which of the following is a guiding document for electrical practice and safety in the U.S.?

The National Electrical Code (NEC) is a crucial guiding document for electrical practice and safety in the United States. It is updated every three years and outlines the standards for the safe installation of electrical wiring and equipment.

The 2020 edition of the NEC represents the most recent comprehensive set of guidelines, improving upon previous versions with new revisions aimed at enhancing electrical safety practices. This edition incorporates updated practices and requirements that address emerging technologies, safety measures, and changes in electrical systems.

While the other editions mentioned, such as 2018, 2021, and 2022, also contain important information and updates to electrical safety practices, the NEC 2020 is the appropriate choice as it reflects the latest regulations and standards recognized for that period, making it the guiding document for current electrical practices in the U.S.