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⚡ Single-Line Diagrams

Diagrams that match the math.

Every EEP single-line diagram is rendered directly from the calculation engine output — service amps, conductor sizes, OCP ratings, and grounding all come from the same source of truth. The SVG you see here is the same SVG embedded in your PDF report and the same one your AHJ will read.

Engine-driven

Diagram nodes and conductors update automatically when the calculator output changes. No drift between the math, the PDF, and the SLD.

Schematic SVG

Pure-SVG output: scales without quality loss, prints clean, embeds inside every PDF report, and degrades safely on any browser.

NEC-aware annotation

Conductor sizes, OCP, EGC, and SPD callouts are labelled with the rule reference — 230.67, T250.122, 240.6(A), and so on.

Reference diagrams

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How EEP renders SLDs

The renderer takes a JSON graph ({ nodes, edges, notes }) and lays it out in horizontal tiers — utility at the top, then service entrance, then panels, then loads. Symbols are drawn from a publication-grade vector library (utility, transformer, switchgear, panel, motor, EVSE, PV, generator, generic load). Edges carry conductor specs, OCP ratings, lengths, and protection-device glyphs (CB, fuse, disconnect, GFCI, ATS).

The data comes directly from the calculation engine — for example the EX-A001 dwelling SLD reads runExA001().outputs.serviceConductor for its service-conductor label. If you change the calculator inputs, the diagram changes. There is no separate drafting step that can drift out of sync.

Limitations. EEP SLDs are schematic-grade. They are clear enough for design review and report attachments, but a permit-grade drafted SLD typically uses CAD blocks and a title block tied to the firm's drawing standard. EEP outputs the schematic and exports it as SVG; the Engineer of Record adapts it into the firm's CAD set as needed.