What type of conductors must be kept within the same raceway?

The requirement for keeping all conductors of the same circuit within the same raceway is grounded in safety and performance considerations. When conductors that share a circuit are housed together, it helps ensure that they maintain the same potential and reduces the risk of interference and electromagnetic induction between them. This practice helps in maintaining balanced loads and facilitates easier circuit troubleshooting.

Keeping all conductors in the same raceway also helps ensure compliance with the National Electrical Code (NEC), which outlines installation practices that protect both the integrity of the electrical system and the safety of those who may work on or near it. If conductors from the same circuit were allowed to be run in different raceways, it could lead to potential issues such as voltage drop discrepancies, circuit imbalances, and complications during maintenance and inspection.

In contrast, the other options focus solely on specific types of conductors, which do not account for the complete circuit. Grounded conductors, bonding conductors, and electrical conductors do not provide the same holistic approach as recognizing that all conductors in a circuit should remain together, ensuring cohesive and safe operation throughout the electrical system.