Which type of wiring diagram is used primarily in power plants and shows the connections between generators and switchgear but excludes internal connections of equipment?

• A. Interconnection
• B. Connection
• C. Schematic
• D. One-line

Answer: (A)

In power plants, diagrams that map how major pieces of equipment link up without showing inside wiring are used to illustrate external connections. The interconnection diagram specifically shows how generators connect to switchgear and buses, focusing on those external links and omitting the internal wiring inside each piece of equipment. That makes it the best match for describing the connections between generators and switchgear while excluding internal details. A one-line diagram provides a high-level, simplified view of the system as a whole, not restricted to just generator-to-switchgear interconnections; a schematic shows detailed internal wiring, which isn’t what's being described here; and a generic “connection” term isn’t a standard diagram type.