In cases where overhead service-drop conductors are installed, what is the required vertical clearance above the roof surface?

The required vertical clearance above the roof surface for overhead service-drop conductors is typically set at 12 feet. This clearance is essential to ensure safety and accessibility, preventing accidental contact with the conductors by individuals and equipment. The 12-foot height helps to minimize the risk of electrical hazards, especially in areas where maintenance or access to the roof might be necessary.

Additionally, having such clearance is a standard requirement in electrical safety codes, ensuring that the conductors remain insulated from possible interference or damage from objects on the roof, and comply with necessary regulations for overhead service installations. This standardization serves to protect both the integrity of the electrical installation and the safety of personnel working in the vicinity.