AI-powered electrical design
Permit-ready residential electrical design: load calculations, panel schedules, and single-line diagrams per NEC 2023/2026.
Built for architects, electrical engineers, and electricians.
Calculation methods and drawing templates are prepared and checked by licensed electrical engineers. The output for your project is generated automatically and is not individually reviewed or stamped: have your design professional and the Authority Having Jurisdiction (AHJ) verify it.
Pick your project to start
One click opens the load calculation. No account needed to calculate.
Ask the NEC Assistant
Free. Ask a code question in plain words and get the answer with the NEC section, for NEC 2023 or NEC 2026.
What is your NEC question?
Answers come from the ZigTech Code Guides and link to the matching section.
AI answers can contain mistakes. Check the adopted code and your local authority (AHJ).
How it works
- 1
Pick a building type
Single family, ADU, duplex, townhome or apartment.
- 2
Enter the loads
Floor area, appliances, heating and cooling, EV charging.
- 3
Download the permit-ready PDF
On a title block, with the NEC references shown.
Sample output
Real sheets from a ZigTech project.
Why ZigTech
NEC 2023 and 2026
Every line of a calculation shows the code section it comes from.
California built in
California Energy Code and CALGreen requirements are in the general notes.
Fast, permit-ready output
From loads to a titled PDF sheet in minutes, not days.
Free tools
Fault current
Available fault current at the equipment.
Voltage drop
Check a feeder or branch circuit run.
EV charger
Size the circuit for EV charging.
NEC chatbot
Ask a code question in plain words.
NEC 2023 Code Guide
The sections residential work uses most.
NEC 2026 Code Guide
The same sections, with the 2026 changes.
Questions
Do I need an account to try it?
No. Run any calculation without an account. A free account is only needed to save a project or download the PDF.
What do I get?
A PDF sheet for each product, or one complete drawing set per building: general notes, details, single-line diagram, load calculation and panel schedules.
Which codes do you support?
NEC 2023 and NEC 2026, with California Energy Code and CALGreen requirements for California projects.
Is my output reviewed by an engineer?
Calculation methods and drawing templates are prepared and checked by licensed electrical engineers. The output for your project is generated automatically and is not individually reviewed or stamped: have your design professional and the Authority Having Jurisdiction (AHJ) verify it.
What does it cost?
Products start at $5.99 and drawing sets at $29.99. See pricing.