For raceways that contain insulated circuit conductors of which size and larger, what is required for protection from abrasion?

For raceways containing insulated circuit conductors, the National Electrical Code (NEC) specifies that conductors of size 4 AWG and larger must be protected from abrasion. This requirement is in place to ensure the integrity of the insulation and the overall safety of the electrical system. Conductors of this size are typically intended for high-current applications, and any damage to their insulation due to abrasion could lead to short circuits or electrical hazards.

The NEC outlines specific installation methods and protection measures that must be followed when dealing with larger conductors, as they often run in environments where they are more susceptible to physical damage. This provision helps to maintain the performance of the wiring system and ensures compliance with safety standards.

In contrast, smaller conductors, such as those 6 AWG or smaller, have different considerations regarding handling and installation, which do not require the same level of protection from abrasion within raceways. This distinction is crucial for electrical professionals to understand when planning and executing wiring installations.