NEC Commercial Electrical Practice Test

What is the minimum height from the finished grade for the point of attachment of overhead service-drop conductors?

1. 8 feet

2. 9 feet

3. 10 feet

4. 12 feet

The correct answer is: 10 feet

The minimum height for the point of attachment of overhead service-drop conductors is typically specified to be 10 feet from the finished grade. This requirement is in place primarily for safety reasons, ensuring adequate clearance above areas where people may be present, such as walkways, driveways, and outdoor spaces. The 10-foot height minimizes the risk of accidental contact with the conductors, especially for persons on ladders, working near the conductors, or those who may be handling large equipment. In commercial settings, adhering to this requirement also helps facilitate safe operation of vehicles and machinery that may be present, further preventing potential electrical hazards. The National Electrical Code (NEC) strictly outlines these measurements to promote safety and reduce the risk of electrical accidents, which is crucial in both residential and commercial environments. Therefore, being familiar with the NEC requirements is essential for electricians and those in the construction industry who are responsible for electrical installations.