NEC Commercial Electrical Practice Test

What is the minimum size for overhead service-drop conductors made of copper?

1. 6 AWG

2. 8 AWG

3. 10 AWG

4. 12 AWG

The correct answer is: 8 AWG

The minimum size for overhead service-drop conductors made of copper is indeed 8 AWG. This requirement is based on the National Electrical Code (NEC) standards, specifically addressing the safe and efficient transportation of electrical power from the service entrance to the service equipment. Choosing 8 AWG ensures that the conductor can handle the electrical load with a sufficient safety margin, minimizing the risk of overheating or electrical failure. Conductors that are too small could sustain damage under high load conditions, leading to safety hazards such as fires or equipment damage. Additionally, larger gauge wires can also better withstand environmental conditions such as wind, ice, and other factors that can create physical stresses on overhead lines. Following the NEC guidelines for service-drop conductors helps ensure overall electrical system safety and reliability, reinforcing why 8 AWG is the appropriate minimum size for these applications.