Certified Fire Investigator Practice Exam

What are overhead cables coming from a transformer called?

1. Ground Service

2. Service Lateral

3. Service Drop

4. Utility Line

The correct answer is: Service Drop

Overhead cables coming from a transformer are referred to as a service drop. This term specifically denotes the final leg of the electrical distribution system that delivers electricity from a utility pole or transformer to a customer’s premises. Service drops typically consist of overhead wiring and are called so because they "drop" down from the higher voltage lines to serve individual consumers, providing a lower voltage suitable for residential or commercial use. Understanding why the other options do not apply clarifies the definition further: "Ground service" would not accurately describe overhead cables as it pertains to underground systems; "service lateral" typically refers to the underground wiring that connects the utility's infrastructure to the meter at the user’s location; and "utility line" is a broader term that encompasses all types of power lines, not specifically the last segment that leads to individual buildings.