SmartSLD
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Tutorials, templates, and references for drawing electrical single-line diagrams. Built around our free online editor at smartsld.com.
TutorialHow to Draw a Single-Line Diagram (Complete Guide)
What an SLD is, the components you need, and a step-by-step walkthrough of drawing one from scratch.
ReferenceSingle-Line Diagram Symbols (IEC + ANSI Cheat Sheet)
Visual reference for the most common SLD symbols, with side-by-side IEC and ANSI/IEEE equivalents.
ComparisonFree AutoCAD Electrical Alternatives in 2026
An honest comparison of the best free and low-cost alternatives to AutoCAD Electrical for drawing single-line diagrams.
TemplateSolar Interconnection Diagram: Template and Examples
What utilities require in an interconnection SLD for residential, commercial, and BESS-tied solar installations.
TemplateSingle-Line Diagram for a 200A Service (Free Template)
A worked example of a 200A residential service entrance SLD, including main panel, sub-panels, and EV / generator additions.
IndustryAI for Electrical Design: 2026 Overview
How large-language and vision models are being used for electrical drawings, where they help, and where they still fall short.