One-lines, three-lines, schematics, ladder diagrams, wiring diagrams, panel schedules, riser diagrams, and construction plans — what each sheet shows, what it deliberately leaves out, and the questions a working engineer asks reading one for the first time.
Every sheet type in a drawing set exists because a different reader needs a different slice of the same design, and none of them is a complete picture on its own. This module walks through each sheet type an electrical engineer actually encounters — what it's built to communicate, what it's deliberately silent on, and the specific questions that separate someone fluently reading a set from someone technically parsing symbols one at a time. Module 3's delta-vs-wye and grounding-vs-bonding concepts show up here directly, applied to how those distinctions actually get drawn.
This is also the module that teaches you to read a panel schedule fluently — cross-checking it against the riser, the one-line, and the power plan — before Module 11 teaches you to produce one to construction-document quality. By the end, you should be able to open an unfamiliar drawing set and know exactly which sheet to read first, and why.