Panel & Switchboard Designer

Panel & Switchboard Designer is a fast drafting tool for electrical distribution boards — for electricians, panel builders, engineers, students and anyone planning a switchboard. Free, with no ads. Works offline.

Draw a panel on a DIN rail or in a North American load center, drop in breakers and protection devices, route the wires, and get a clean schematic, a circuit schedule and a bill of materials — right on your phone or tablet.

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

▸ THREE REGIONS, THREE RULESETS

- Europe — IEC 60364, DIN VDE, NYM-J, NYY-J, H07V-K

- Russia & CIS — GOST / PUE, VVG, NYM, AVVG cable families

- North America — NEC, UL 67, NM-B, SER, THHN, AWG sizes

The standard, device library, wire colours and ratings all follow the selected region.

▸ TWO PANEL LAYOUTS

- DIN-rail cabinet — rows of 17.5 mm modules with cable ducts

- Load center — two columns of 120/240 V breakers with phase A/B alternation, tandem and GFCI/AFCI slots

▸ LARGE DEVICE LIBRARY — 130+ ITEMS

MCBs, RCBOs, RCDs, AFDD, surge protectors, NEOZED and NH fuses, motor-protection breakers, thermal relays, contactors, starters, soft starters, VFDs, impulse relays, transfer switches (ATS), timers, thermostats, phase-monitoring relays, energy meters, current transformers, terminal blocks, busbars, power supplies, transformers and more.

Also DC and solar: PV disconnects, string fuses, DC breakers, battery protection, shunts.

And automation: PLC and I/O modules, KNX, DALI, Modbus, smart-home modules, DIN-rail network gear.

▸ WIRING THAT DRAWS ITSELF

Drag from one terminal to another — the wire is routed automatically through the ducts, coloured by terminal (L1/L2/L3/N/PE) and sized to the standard. Add waypoints, nudge any segment, group wires into harnesses and view them in an exploded diagram.

▸ BUILT-IN DESIGN CHECKS

Wire cross-section vs. breaker rating, design current vs. rated current, neutral and PE colours, missing N/PE connections, phase-to-neutral shorts and unconnected terminals. Every warning is a tap-to-jump link to the item.

▸ HEAT AND POWER-ON MODE

Estimate power losses and heating inside the enclosure, with recommendations. Switch on power mode, tap devices and see which circuits lose voltage.

▸ CIRCUIT SCHEDULE AND BOM

Group table with load power, design current, wire size and warnings. Specification with item names, quantities, module counts and cable lengths from the route you actually drew.

▸ EXAMPLES, EXPORT AND SHARING

Start from ready-made examples: flat, house, solar PV, motor control, PLC, smart home. Export PNG, SVG, print / PDF, DXF, Visio, project file, JSON, circuit table CSV and specification CSV. Send a design to a colleague with a short code (needs an internet connection).

▸ MADE FOR TOUCH AND DESKTOP

Drag and drop, pinch-zoom, undo/redo, duplicate, lock. Floating action bar on phones, three-column layout on tablets and desktops.

▸ FREE AND PRIVATE

The app is free and has no ads. No account needed. Projects are stored on your device. Everything works offline except sharing by code.

▸ 30 LANGUAGES

English, Russian, Ukrainian, Kazakh, German, French, Italian, Spanish, Portuguese, Polish, Dutch, Czech, Slovak, Romanian, Hungarian, Greek, Swedish, Danish, Norwegian, Finnish, Turkish, Bulgarian, Serbian, Lithuanian, Latvian, Estonian, Chinese, Japanese, Arabic, Hebrew.

The app is a drawing aid. It does not replace a proper design, a licensed electrician or the local code.