How far above grade must the point of attachment for overhead service conductors to a building be?

The point of attachment for overhead service conductors to a building must be at least 10 feet above grade to ensure safety and prevent accidental contact. This height requirement is established to minimize the risk of electrical hazards, such as someone inadvertently reaching the conductors or equipment being parked beneath them. Maintaining this clearance is particularly important in residential areas where there may be people, vehicles, or other obstructions that could interfere with the overhead conductors, increasing the risk of electrical shock or line damage.

By requiring this minimum height, the National Electrical Code (NEC) aims to promote safe installation practices and protect both property and individuals from the dangers associated with electrical installations. Additionally, this clearance helps prevent interference from vegetation and minimizes the risk of a short circuit due to physical encounters with the service conductors.