A one-line diagram serves to determine which aspects of the power system?

A one-line diagram serves to determine which aspects of the power system?

• A. All of these
• B. The path of electrical power
• C. Future expansion capacity
• D. Power shut-off points

Answer: (A)

A one-line diagram is a simplified schematic of a power system that shows how electrical power flows from the source through transformers, switchgear, buses, and feeders to the loads, using a single line to represent the three phases. Because it focuses on the path of power, it also marks protective devices and switches, indicating where power can be shut off. At the same time, it serves as a planning tool by illustrating how the system is interconnected and where additional capacity or future expansion could be added. Since it combines routing, isolation points, and potential expansion in one view, it addresses all these aspects, making it the best overall representation.

A one-line diagram is a simplified schematic of a power system that shows how electrical power flows from the source through transformers, switchgear, buses, and feeders to the loads, using a single line to represent the three phases. Because it focuses on the path of power, it also marks protective devices and switches, indicating where power can be shut off. At the same time, it serves as a planning tool by illustrating how the system is interconnected and where additional capacity or future expansion could be added. Since it combines routing, isolation points, and potential expansion in one view, it addresses all these aspects, making it the best overall representation.