According to the NEC, can grounding conductors and bonding jumpers be installed in the same raceway with service conductors?

The National Electrical Code (NEC) provides specific guidelines regarding the installation of grounding conductors, bonding jumpers, and service conductors within raceways. According to the NEC, grounding conductors and bonding jumpers must be kept separate from service conductors in raceways to prevent potential safety issues and interference.

The primary concern is that grounding and bonding conductors carry fault current and serve as a safety feature, while service conductors carry the normal load current. Mixing these conductors could lead to a situation where fault currents do not flow properly, potentially compromising the effectiveness of the grounding system and increasing the risk of electrical hazards.

Additionally, separating these conductors minimizes the risk of electrical noise and maintains the integrity of both grounding and bonding systems. Thus, the guidance that they cannot be installed together is based on established safety principles intended to protect both the electrical system and the individuals who may work with or near it.