Which NEC section discusses the installation or use of listed or labeled equipment according to instructions?

The correct answer highlights that NEC 110.3(B) specifically addresses the requirement for listed and labeled equipment to be installed and used in accordance with the manufacturer's instructions. This section emphasizes the importance of following the guidelines set by the manufacturer when it comes to the installation and operation of electrical equipment. Adhering to these instructions ensures that the equipment functions safely and effectively, as it was designed to operate within certain parameters established by the manufacturer.

The definitions of "listed" and "labeled" equipment are significant in the context of electrical installations because they imply that the equipment has been tested and meets certain standards. By referencing the manufacturer's instructions, NEC 110.3(B) underscores the responsibility of electrical professionals to comply with these standards for safety and reliability in installations.

The other options do not specifically deal with the use of listed or labeled equipment according to instructions. NEC 110.3(A) pertains to the general requirement for installation and uses of electrical equipment, while NEC 110.2(A) focuses on the examination of equipment for suitability. NEC 90.1(A) outlines the purpose and scope of the NEC but does not address the specifics of installation according to manufacturer instructions. Thus, NEC 110.3(B) is the clear standard that