What must be included in large or complex electrical system documentation?

In large or complex electrical system documentation, including terminal numbers is crucial because they provide a unique identification for each terminal within a system. This makes it easier for technicians and engineers to reference and troubleshoot connections, ensure proper wiring, and maintain organization in the documentation. Terminal numbers help to clarify complex interconnections and can significantly reduce the risk of errors during installation or repair, facilitating more efficient maintenance of the system.

While wiring diagrams, ladder diagrams, and blueprints are important components of electrical documentation, they do not specifically focus on the individual terminals and their identification, which is essential for clarity and precision in the documentation of larger systems.