Question

in the national electrical code (nec), what is the focus of article 406?
transformers
motors
switches
receptacles

Explanation:

Article 406 of the NEC specifically covers the installation, ratings, and specifications for receptacles, including their types, grounding, and placement requirements. The other options are addressed in different NEC articles: transformers in Article 450, motors in Article 430, and switches in Article 404.

Answer:

receptacles