What is the minimum clearance of service drops above roof surfaces?

The minimum clearance of service drops above roof surfaces is important for both safety and compliance with electrical codes. A clearance of 8 feet is required to ensure that service drops, which are the overhead electrical lines connecting to buildings, are positioned high enough to avoid accidental contact by individuals or equipment that may be on or near the roof. This distance minimizes the risk of electrical hazards and allows for safe access while protecting the lines from damage caused by maintenance activities or the installation of roof structures such as skylights or ventilation systems.

Choosing 8 feet as the standard clearance aligns with common regulations and best practices in the industry. This height accommodates the various activities that may take place on rooftops, such as repairs or maintenance work, while ensuring that electrical safety is maintained. The other choices represent clearances that do not meet the standard codes or may pose increased risks that regulations aim to mitigate.