Home Inspection Electrical Practice Test

Question: 1 / 475

What is the minimum clearance above a roadway for electrical service drops?

8 ft.

10 ft.

12 ft.

18 ft.

The minimum clearance above a roadway for electrical service drops is established to ensure safety and prevent any potential hazards that could arise from vehicles or obstructions. Specifically, an 18-foot clearance is required to allow for large vehicle access, including trucks and buses. This height helps to ensure that overhead wires do not interfere with the operation of these vehicles, reducing the risk of accidents or power outages caused by contact with the electrical service drop.

In addition to vehicular safety, having a sufficient clearance height also protects the integrity of the electrical service itself. Over time, sagging wires can occur due to weather conditions or the weight of ice and snow, making it critical to maintain a higher minimum clearance to accommodate such factors. Thus, 18 feet is the appropriate standard for ensuring both public safety and the reliability of electrical service.

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