Which device on a structure's electrical system is located where service enters the building and is connected to the exterior conduit?

Which device on a structure's electrical system is located where service enters the building and is connected to the exterior conduit?

• A. Junction Box
• B. Meter Base
• C. Weatherhead
• D. Transformer

Answer: (C)

This question tests understanding of where the service entrance conductors transition from the outside utility feed into the building’s wiring and how that transition is kept weatherproof. The device located at the point where the service enters the structure and is connected to the exterior conduit is the weatherhead. It sits on the exterior and serves as the weatherproof point for the overhead service conductors to enter the building’s conduit run, allowing the wires to pass from the outdoor environment into the interior raceway while shedding water and protecting the connection. The weatherhead marks the boundary between the outdoor service drop and the building’s electrical system, and it is specifically designed to stay weatherproof and accessible for service work. A meter base, while outside, is where the electric meter is mounted and is not the entry point for the building’s wiring. A junction box is used to enclose splices or terminations and is not the point where service conductors enter from the exterior conduit. A transformer is a utility device that steps voltage up or down and is not located at the building’s electrical entry.

This question tests understanding of where the service entrance conductors transition from the outside utility feed into the building’s wiring and how that transition is kept weatherproof. The device located at the point where the service enters the structure and is connected to the exterior conduit is the weatherhead. It sits on the exterior and serves as the weatherproof point for the overhead service conductors to enter the building’s conduit run, allowing the wires to pass from the outdoor environment into the interior raceway while shedding water and protecting the connection. The weatherhead marks the boundary between the outdoor service drop and the building’s electrical system, and it is specifically designed to stay weatherproof and accessible for service work.

A meter base, while outside, is where the electric meter is mounted and is not the entry point for the building’s wiring. A junction box is used to enclose splices or terminations and is not the point where service conductors enter from the exterior conduit. A transformer is a utility device that steps voltage up or down and is not located at the building’s electrical entry.