Which of the following shows the connections for power devices?

The correct choice is the power diagram, which provides a clear visual representation of how power devices are connected within a system. This type of diagram typically illustrates the electrical connections and power flow between various components, highlighting how power is distributed and how devices interact with one another.

Power diagrams are particularly useful for understanding the energy supply and distribution within a system, making them essential for maintenance and troubleshooting procedures. They often incorporate symbols and labels specific to power devices, which ensures clarity in identifying connections. This is crucial for technicians and engineers who need to assess and manage power systems effectively.

In contrast, other diagram types such as ladder diagrams, wiring diagrams, and schematic diagrams serve different purposes. Ladder diagrams are more focused on relay logic and control circuits, wiring diagrams provide detailed connections for electrical systems but may not emphasize the power aspect, and schematic diagrams illustrate the functional relationships but may not show actual power flow. Each of these diagrams serves important roles in their respective contexts but does not specifically focus on the power connections as effectively as the power diagram does.