What is an essential feature of all raceways according to the Code?

Raceways are designated conduits, ducts, or channels specifically installed to hold wires, cables, or busbars. This feature is fundamental as it directly relates to the primary function of a raceway, which is to protect and provide a pathway for electrical conductors. By ensuring that raceways are capable of holding these electrical components, the National Electrical Code (NEC) emphasizes safety and organization within electrical installations.

The requirement for raceways to hold wires or cables highlights their role in preventing physical damage to conductors and ensuring that they are secured and insulated from potential hazards. This function is crucial for maintaining safe electrical systems, promoting proper grounding, and facilitating reliable connections.

The other aspects mentioned, such as color, material, or placement of raceways, do not serve as essential features under the NEC. While certain regulations may specify the use of specific materials (e.g., metallic or nonmetallic), or restrictions on the installation location, the core requirement is about their ability to carry and protect conductors.