Home Inspection Electrical Practice Test

If service drop wires pass over flat roofs, what is the minimum clearance they must maintain?

1. 6 feet

2. 8 feet

3. 10 feet

4. 12 feet

The correct answer is: 8 feet

The minimum clearance that service drop wires must maintain when passing over flat roofs is 8 feet. This clearance ensures safety by preventing accidental contact with the wires, which could occur if people access the roof or if equipment is placed on it. Adequate clearance helps to mitigate the risk of electrical shocks and provides a safe distance for utility workers and maintenance personnel who may need to work in the area. Understanding the necessity of these clearances is crucial for home inspectors, as they play a significant role in assessing the safety and compliance of electrical installations. Clearances are defined by the National Electrical Code (NEC), which sets standards to protect both the public and service workers. Following these guidelines ensures that the electrical infrastructure is not only functional but also safe to operate in close proximity to buildings and roofs.