Insulated circuit conductors of which gauge and larger require protection from abrasion in raceways?

Insulated circuit conductors that are 6 AWG and larger require protection from abrasion when installed in raceways due to the risk of the conductor insulation becoming damaged. This is particularly important in environments where conductors may be subjected to physical wear or contact with the raceway walls. When conductors are not adequately protected, they become vulnerable to damage which could lead to electrical faults or short circuits.

Raceways serve to protect conductors from environmental factors, but the conductor's own insulation also needs safeguarding, especially as the gauge decreases. Conductors that are 6 AWG or larger typically have thicker insulation, but they are still subject to potential abrasion from the raceway’s interior surface, especially during installation or if there is movement in the system over time.

Understanding these requirements is crucial for ensuring electrical safety and compliance with electrical codes, which specify the necessary protection based on the conductor's size. This safeguards the integrity of the electrical system and prevents potential hazards associated with damaged insulation.