Are grounding electrode conductors allowed within raceways that contain service conductors?

Grounding electrode conductors are not allowed within raceways that contain service conductors due to safety concerns and the risk of potential hazards. The National Electrical Code (NEC) stipulates that grounding electrode conductors must remain separate to ensure that they function effectively to dissipate electrical faults into the ground without interference from other conductors.

When grounding electrode conductors share space with service conductors, it creates the possibility of electrical faults affecting the grounding system. This could impede the grounding system's ability to safely discharge electrical faults, potentially leading to equipment damage or even electric shock hazards. Therefore, to maintain the integrity and reliability of the grounding system, the NEC prohibits their coexistence in the same raceway.

Insulating grounding electrode conductors or varying the installation location does not change the requirement, as the fundamental concern lies in the raceway's shared space that could lead to compromised ground fault protection. This ensures that electrical installations remain safe and comply with the NEC's intent to protect both people and property.