Which two types of electrical diagrams are most commonly used?

Wiring diagrams and schematic diagrams are indeed the most commonly used types of electrical diagrams. Wiring diagrams provide a detailed layout of electrical connections, indicating the physical arrangement and the components involved in a system. These diagrams are essential for understanding how to physically connect wires, devices, and circuit elements within an electrical system.

Schematic diagrams, on the other hand, focus more on representing the electrical flow and relationships between the components rather than their physical layout. They use standardized symbols to illustrate connections and functionalities, making it easier for technicians and engineers to analyze the circuitry.

Both types serve distinct but complementary purposes in electrical design and troubleshooting, which is why they are frequently referenced together in practice. While other types of diagrams like block diagrams provide a higher-level overview and pictorial diagrams offer a visual representation, they do not convey detailed operational or connection information as effectively as wiring and schematic diagrams do.