What is the required vertical clearance of final spans of overhead service conductors above certain surfaces?

The correct answer reflects the National Electrical Code requirements for the vertical clearance of overhead service conductors. Specifically, the NEC mandates that final spans of overhead service conductors must maintain a vertical clearance of at least 3 feet from the ground or any surface that is subject to pedestrian traffic, ensuring safety and preventing accidental contact.

This requirement is crucial for several reasons. It protects individuals who may be walking or working underneath the conductors and reduces the risk of electrical hazards. Additionally, compliance with this clearance requirement helps ensure that the conductors are not inadvertently damaged by vehicles or other equipment, thereby promoting the longevity of the electrical system.

Maintaining the correct vertical clearance aligns with safety principles and electrical standards, minimizing the risk of electrocution or equipment failure. This understanding is essential for electrical professionals when installing or inspecting overhead services, as it underscores the importance of adhering to NEC guidelines to protect both people and property.