When establishing a service drop, what is a minimum requirement for its vertical clearance above a roof garden?

The minimum requirement for vertical clearance of a service drop above a roof garden is established to ensure safety and accessibility. The correct answer is 10 feet. This height requirement is important to prevent any potential damage to the service drop line and to allow adequate space for maintenance, particularly since roof gardens may involve activities like planting and other landscaping work.

The 10-foot clearance minimizes the risk of the service drop being interfered with or damaged by people working in the garden, objects being used, or even the growth of taller plants. Additionally, it helps avoid issues associated with electrical safety, such as the risk of electrical shock or physical obstructions that could lead to accidents.

Specific regulations and codes vary, but the 10-foot clearance is a commonly accepted standard found in the National Electrical Code (NEC) and other local building regulations regarding service drop requirements. These regulations aim to enhance safety for both the electrical service and the activities occurring in the garden area.