All conductors of the same circuit shall be ______, unless otherwise specifically permitted in the Code.

All conductors of the same circuit are required to be in the same raceway or cable or to be in close proximity in the same trench, unless the Code provides specific permits for different arrangements. This requirement is important because it ensures that all conductors carrying current together are grouped correctly. This grouping helps in maintaining equal potential across the circuit, which is crucial for the safety and functionality of the electrical installation.

When conductors are placed in the same raceway or cable, it ensures proper physical protection, minimizes electromagnetic interference, and provides a defined pathway for the conductors, helping to prevent potential hazards. Similarly, having conductors in close proximity in the same trench aids in maintaining consistent thermal performance and reduces the risk of overheating.

The allowance for specific exceptions in the Code recognizes that there may be unique situations where different configurations might be safe or necessary, but unless such exceptions are explicitly mentioned, the primary rule is to keep them either in the same raceway or in close proximity within a trench. This understanding is critical for compliance with safety codes and standards in electrical installations.