What is the minimum height above finished grade for the point of attachment of overhead wiring to a building?

• A. 8
• B. 10
• C. 12
• D. 14

Answer: (B)

Overhead service conductors must attach to a building with enough vertical space to prevent contact and provide safe access for people and maintenance. The minimum height for the point of attachment above finished grade is 10 feet. This clearance helps ensure the conductors stay well above pedestrians, vehicles, and typical obstacles, while also accommodating seasonal changes like snow or ice and making servicing easier. The measurement is taken from the finished grade at the building’s base where the conductors attach. Higher heights aren’t required unless site-specific conditions demand them, and lower heights would create unnecessary safety risks.