How is an electrical raceway defined according to the NEC?

An electrical raceway, as defined by the National Electrical Code (NEC), is indeed an enclosed channel specifically designed for holding wires and cables. This definition encompasses a variety of physical structures, such as conduit, duct, cable trays, and raceways that protect and contain electrical conductors.

The primary function of a raceway is to safeguard the wiring from physical damage and environmental factors, also reducing the likelihood of electrical hazards. By providing a dedicated space for electrical conductors, raceways enhance organization and facilitate easier installation, maintenance, and future upgrades of electrical systems. Understanding this definition is crucial for ensuring compliance with electrical safety standards and proper installation practices.

The other answer choices, while related to concepts in electrical work, do not accurately describe an electrical raceway's function or purpose.