Everything you need to design safe, professional electrical panels.
Drag and drop components onto DIN rails, just like building a real panel.
Place MCBs, RCDs, RCBOs, contactors, surge protectors, and isolators directly onto DIN rails. Resize and reorder with ease.
Choose from standard panel sizes or define custom dimensions. Support for 1-row to multi-row enclosures.
Name every circuit, assign rooms, and add notes. All data flows into your exported schedule automatically.
Auto-generated single-line diagrams for every cabinet in your project.
Single-line diagrams are generated directly from your panel layout. No manual drawing needed.
Each cabinet gets its own diagram. Multi-cabinet projects show cross-references between panels.
Standard IEC symbols for breakers, RCDs, surge protectors, contactors, and consumer endpoints.
Export individual diagrams or a combined SVG with all cabinets. Ready for print or inclusion in project documentation.
Cable type and cross-section labels on every branch. See at a glance what goes where.
Lighting, sockets, boilers, ovens, EV chargers — each circuit shows its endpoint symbol at the branch end.
Get the right cable for every circuit, automatically.
Enter load, cable length, and installation method. BreakerBoxx calculates the minimum cross-section per IEC/HD standards.
Ensures cables meet voltage drop limits for the circuit type — 3% for lighting, 5% for other uses.
Supports reference methods A1, A2, B1, B2, C, D, E, F, and more. Derating factors applied automatically.
Professional documents your clients and inspectors expect.
Complete table of all circuits with breaker type, rating, cable size, load, and circuit description.
Itemised list of every component with quantities. Hand it straight to your supplier for quoting.
Visual representation of your DIN rail layout as it will appear in the physical enclosure.
Your data stays in your browser. No cloud sync, no accounts, no telemetry.
All your designs are stored in your browser. Nothing is uploaded to any server.
We don't collect data. We don't even have the infrastructure for it. Your designs are yours.
Runs in your browser — no installation needed. Desktop apps for Windows, macOS, and Linux coming soon.