Are conductors of AC and DC circuits rated at 600 volts nominal or less allowed to occupy the same raceway?

Conductors of AC and DC circuits rated at 600 volts nominal or less are not permitted to occupy the same raceway due to the potential for interference and safety concerns. AC (Alternating Current) circuits and DC (Direct Current) circuits operate under different electrical principles, which can lead to complications such as induction and unwanted voltage differences if they are run together in the same raceway.

Having AC and DC conductors in a single raceway can lead to issues like overheating and signal degradation, which could pose safety hazards or affect the performance of electronic equipment, particularly if sensitive devices are involved. The National Electrical Code (NEC) has specific regulations designed to ensure safe and reliable installations, prohibiting the cohabitation of these different types of conductors to maintain system integrity and safety.

While it is important to have specific conditions or allowances for certain situations in electrical installations, the general rule is that AC and DC conductors should not share a raceway in standard applications to minimize risks and ensure proper function.