What is the lowest permissible point of attachment for a service drop over an alley or street?

The correct answer is 16 feet because electrical code regulations are designed to ensure safety in the vicinity of power lines. The National Electrical Code (NEC) specifies that service drops must be installed at a minimum height to avoid contact with vehicles, pedestrians, and other obstacles that may be present in areas like alleys and streets.

A height of 16 feet provides a sufficient clearance that reduces the risk of accidental contact with vehicles, which might be higher than the average person but could also include delivery trucks or other large vehicles. This height is a standard requirement in many jurisdictions to ensure both public safety and compliance with industry standards.

Lower height options would not provide the same level of safety, increasing the potential for accidents. Thus, the requirement for 16 feet is established as a minimum to uphold safety protocols in these areas.