Panel & Switchboard Designer

A web version is also available: https://electricalpanel.netlify.app/

Design an electrical panel, load center or DIN-rail distribution board on your phone: place the breakers, wire them, check the circuits, calculate wire sizes and voltage drop, and print the panel schedule, labels and drawings.

Panel & Switchboard Designer is a tool for electricians, panel builders, engineers, students and homeowners planning a breaker panel, a subpanel or a solar PV installation.

NEW

Minimal panel build: enter the outgoing circuits, and the app picks the main breaker, branch breakers, GFCI/AFCI or RCDs by leakage current, balances the phases and chooses the smallest enclosure.

Single-line diagram (one-line diagram) drawn from the panel automatically, with a circuit table under the branches. Move and align items, add notes; export to PDF, PNG, DXF, Visio and SVG.

DESIGN THE PANEL

160+ device types: circuit breakers, GFCI, AFCI, dual function, RCD, RCBO, AFDD, surge protection (SPD), main lugs (MLO), transfer switches, contactors, relays, timers, energy meters, power supplies, PLC and smart home modules.

North American load centers and DIN-rail enclosures in real sizes; busbar combs, distribution blocks, neutral and ground bars, terminal blocks.

Wires in the colors of your standard: drag from terminal to terminal and they route themselves neatly, without crossings; group them into bundles.

30 brands: Square D, Eaton, Siemens, Leviton, GE, ABB, Schneider Electric, Legrand, Hager and more.

CHECK AND CALCULATE

Wiring check: unconnected conductors, neutral on a hot terminal, misused ground, circuits without supply, overloaded breakers, phase imbalance.

Voltage mode: switch breakers off and see what loses power.

NEC load calculation (Article 220), demand factors, 125% continuous loads.

Wire size by ampacity, voltage drop and disconnection time; voltage drop of the service and every branch circuit.

Short-circuit current against breaking capacity, earth fault loop impedance, selectivity between breakers.

Heat dissipation and temperature rise inside the enclosure.

Solar PV: strings and combiner boxes, DC fuses and disconnects, DC surge protection, polarity check, DC and AC cable losses. EV charger circuits.

PRINT AND EXPORT

Panel schedule (circuit directory), bill of materials and cable schedule: print, PDF or CSV.

Panel labels with circuit names, in the color of each breaker’s strip.

Print to scale, 1:1 on several sheets or fit to one page.

DXF and Visio drawings for AutoCAD and other CAD, PNG and SVG images.

Save projects, open project files, share a project by code.

EVERY STANDARD

North America: NEC, UL 67, 120/240 V and 120/208 V.

Europe: IEC 60364, DIN VDE, 230/400 V.

United Kingdom: BS 7671, consumer units.

Russia and CIS: PUE, GOST.

Ready examples to start from: apartment, house with a garage and gate, three-phase panel, solar PV, motor control, PLC, smart home.

30 languages. Works offline, no account needed.

The calculations help with design; they do not replace a check by a licensed electrician or the requirements of your local code.