What type of diagram shows actual wiring connections with each wire labeled?

The correct answer is a wiring diagram. A wiring diagram provides a detailed visual representation of the actual wiring connections in an electrical system. It labels each wire, making it clear how the components are interconnected. This type of diagram is crucial for electricians and technicians as it allows them to understand how to properly connect and troubleshoot the wiring setup.

In contrast, a schematic diagram typically illustrates the electrical principles of the system rather than the physical connections. It focuses on showing the relationship between different components and how they function together electrically, but does not provide the specific layout or labeling of actual wires.

An interconnection diagram, while useful, generally focuses more on the links between major components rather than the specific wiring details. It often depicts how various systems interface with one another without delving into the precise wiring connections.

Finally, a layout diagram gives an overview of the physical arrangement of the equipment but does not provide the level of detail regarding wiring connections that a wiring diagram does. It often includes the positioning of equipment within a space but lacks specific information about the wiring itself.