Red Seal Powerline Technician Practice Exam

Which part of a powerline is typically called the service drop?

1. The main transmission line

2. The section that connects substations

3. The short cable extending from the utility pole to the customer's premises

4. The ground wire for safety

The correct answer is: The short cable extending from the utility pole to the customer's premises

The service drop refers specifically to the section of overhead or underground electrical wiring that connects the utility’s distribution system to the customer's premises. This includes the short cable that extends from a utility pole or transmission structure directly to the customer's meter or service entrance. This part of the powerline is critical because it is the final link that delivers electricity from the utility to residential or commercial buildings. It is designed to be flexible and accommodates various heights and distances depending on the installation requirements. In contrast, options such as the main transmission line and the section connecting substations pertain to larger network connections within the electrical grid. These serve different functions that involve high voltage transmission over long distances, contrasting with the more localized nature of the service drop. The ground wire is focused on safety and does not deliver power; it serves to protect the electrical system and ensure safety by providing a path for fault current. Thus, the service drop is distinctly defined by its role and location in the power distribution system.