Audience
Electricians, from apprentices to foremen, working on residential and commercial electrical planning and estimating.
About ZapSketch
ZapSketch is a browser-based electrical home-run planning tool for electricians, electrical contractors, and estimators. Users can import a floor-plan PDF, sketch walls on a blank sheet, or work from a quick drawing, then place panels, junction boxes, and devices and route circuits and raceways. The application measures run lengths and provides preliminary conductor-sizing, ampacity, voltage-drop, and conduit-fill feedback as the layout changes, using documented NEC 2023 calculation assumptions. Users can review circuit schedules and export marked-up plan PDFs and raceway pull schedules for estimating, review, and field handoff; some export details and unwatermarked reports require Pro. Free standalone voltage-drop, wire-size, and conduit-fill calculators are also available. ZapSketch is a preliminary planning aid, not a replacement for adopted-code review, engineering judgment, or verification of project conditions.