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Single Line Diagram Maker

Describe your electrical distribution system — utility feed, panels, circuits — and AI builds a standard single line diagram.

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Free Single Line Diagram Maker
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Draft a conceptual one-line diagram for a small commercial building: utility service entrance feeding a 500 kVA pad-mounted transformer, stepping down to a 400A main switchboard, with four feeders to Panel A (retail lighting), Panel B (HVAC), Panel C (kitchen equipment), and a fire pump feeder, each labeled with approximate amperage.

Here's the one-line diagram for the commercial building electrical service.

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Prompts to start from

Click one to fill the box above. Edit anything before you send.

How to describe a one-line diagram

No template to fill in and no drawing. You talk; the canvas keeps up.

Single line diagram: utility to main panel to three branch circuits...

brief.pdflecture-3.pptx
01

List the equipment

Name sources, transformers, buses, protective devices, and downstream loads.

02

State the connections

Describe the upstream-to-downstream order and provide known voltage or equipment ratings.

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03

Check the technical draft

Review topology, labels, and symbol meanings with the system documentation before relying on the diagram.

A simplified view of power distribution

A single-line diagram summarizes the main connections in an electrical power system. It abstracts the distribution path so readers can follow equipment relationships without seeing every conductor.

Explain a system's overall arrangement

Use a conceptual one-line for study, equipment discussions, or an initial documentation draft. Detailed wiring, protection studies, and construction requirements need their own verified engineering information.

Make the abstraction explicit

  1. Identify the source. Readers should be able to trace the supply toward each load.
  2. Use unique equipment names. Match identifiers to the equipment schedule or source notes.
  3. Label voltage transitions. Keep transformer sides and their supplied ratings distinct.
  4. Mark missing information. Do not invent breaker sizes, cable data, or fault ratings.
  5. Explain the notation. Check the symbol convention required for the intended audience.

Draft connections from a description

MyMap can organize your equipment relationships into a conceptual diagram. Ask it to correct a branch or add a known rating; have the resulting technical content reviewed before operational use.

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PNG and PDF

Whole map or one frame. PDF and clean PNG on Pro.

Slides

Ask for slides from this map and present frame by frame.

Share a link

A read-only link for anyone; they can copy it to their own canvas.

Keep editing

Every map stays on your canvas; come back and ask for more.

Common questions

Is the output a construction-ready electrical drawing?

Treat it as a conceptual draft. Construction and operational documentation require verified system data and qualified engineering review.

What information should I include?

Provide equipment identifiers, connection order, voltage levels, and any confirmed ratings. Explicitly mark information that is unavailable.

Can the diagram show more than one source?

Describe each source and the equipment connecting it to the system. Include the intended switching arrangement so the draft does not imply an incorrect connection.

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Single Line Diagram Maker

Free to start. No credit card required.

✦ Free to start · No credit card required · PDF, docs & images supported