🔍 Key Concepts

• Differences between a wiring diagram and a one-line (single-line) diagram • How a ladder / schematic diagram is typically arranged (left-to-right control circuits with rungs) • What an isometric diagram usually looks like in piping or cable routing

💭 Think About

• Look at how many conductors for each circuit are actually drawn in the illustration—does it show every individual wire, or just a symbolic path for power flow? • Notice whether the drawing focuses on physical routing and 3‑D layout, or on functional connections between major components like generators, switchboards, and transformers. • Ask yourself if the layout resembles control-circuit rungs (ladder style) or a simplified block-style power distribution overview.

✅ Before You Answer

• Verify whether the drawing shows only one line per circuit to represent all three phases of power, or shows each phase/individual conductor separately. • Check if the purpose of the diagram appears to be to show how power is distributed between major pieces of equipment rather than how to physically install or route cables. • Confirm that the diagram does not attempt to show 3‑D views, pipe runs, or the detailed terminal-to-terminal wiring inside panels.