For overhead service conductors exceeding 600V that pass over commercial areas subject to truck traffic, what is the minimum clearance required?

In commercial areas where overhead service conductors exceed 600V and are subject to truck traffic, the National Electrical Code (NEC) specifies a minimum clearance requirement of 18 feet. This requirement ensures safety by preventing the possibility of accidental contact between vehicles, such as trucks, and the overhead conductors.

The clearance height is particularly important in areas with significant traffic, as it reduces the risk of electrical hazards and potential power interruptions. The NEC sets these standards not only for the safety of the public and workers but also to protect the electrical equipment from physical damage that could compromise the integrity and functionality of the electrical system.

In summary, the minimum clearance of 18 feet is designed to accommodate the height of commercial vehicles while ensuring a sufficient safety margin for overhead electrical conductors, thereby maintaining a safe environment in areas frequented by heavy traffic.