NEC Commercial Electrical Practice Test

Which of the following is true regarding the installation of service conductors in relation to other buildings?

1. They must be routed through all buildings.

2. They should only be connected to exterior power sources.

3. They are allowed to pass through other structures.

4. They are not allowed to pass through another building.

The correct answer is: They are not allowed to pass through another building.

The statement that service conductors are not allowed to pass through another building is rooted in safety and code requirements outlined in the National Electrical Code (NEC). This regulation is designed to minimize risks associated with electrical hazards, such as potential fire hazards or complications that arise during maintenance or emergencies. When service conductors pass through a building, there are several concerns that can arise. For instance, if the conductors were to experience a fault or short circuit while encased within a structure, the risk of fire or electrical shock increases dramatically. Additionally, if maintenance or inspection is required, having service conductors running through another building could complicate or delay access, posing further risks to both property and personnel. By ensuring that service conductors are not routed through other buildings, the NEC prioritizes both safety and ease of access for maintenance, thereby reducing potential hazards associated with electrical systems.