ElectroBoard
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Online electrical panel designer

Build the panel. Check before installation.

Free, in your browser, nothing to install. 100+ automatic checks against IEC 60364 while you design the panel.

Create a panel for freeMy panels
  • Works in browser
  • Cloud storage
  • Export PDF · .eboard

Demo panel check:1 safety error0 problems1 recommendation

Example of an error explained

Online electrical panel check

Errors show up before installation.

Demo panel / 02 rails

Demo example · 01 / 04

Safety error

«RCD rooms» — closed N-loop on «Neutral busbar»

What was found

Device both draws N from «Neutral busbar» and feeds N back into it. Remove the binding on one of the owners via Disconnect in device properties.

Demo panel detail · constructor render

Inside the electrical panel designer

From an empty rail to a finished project.

Five steps in the real editor, on the “Apartment” demo panel: two DIN rails, an incoming breaker, a voltage relay, an SPD, two RCDs, nine circuits and three combs, a TN-C-S earthing system and checks to IEC 60364.

ElectroBoard/ Demo project

Interactive tour

  1. 01Empty panelDIN rails, the N neutral bar and the PE earth bar.
  2. 02Add devicesBreakers and RCDs from the catalog snap onto the rail.
  3. 03ConnectThe editor routes the wires between devices by itself.
  4. 04CheckErrors, issues and recommendations — right above the panel.
  5. 05Export PDFEquipment specification, drawings, installation and labels — ready to print.
The real ElectroBoard editor, step “Connect”The real ElectroBoard editor, step “Connect”

03 / 05Automatic wiring

Screenshots of the real editor.

Interactive model · “Apartment” demo panel

Scroll to zoom, drag to pan. Esc to close.

Features

From the first module to a single-line diagram and PDF.

Design

  • Visual DIN rail editor

    Drag devices from the palette onto the rail — with search, favorites and recents. Works on a computer, tablet and phone.

    • DIN rail
    • Desktop · tablet · phone

    DocumentationHow the editor works

  • 29 types of modular devices

    Protection, switching, monitoring relays, metering, power supplies: MCBs, RCDs, RCBOs, SPDs, AFDDs, fuses, contactors, ATS, 1-0-2 changeover switches, meters.

    • MCB
    • RCD
    • RCBO
    • SPD
    • AFDD
    • ATS

    DocumentationDevices and modules

  • Busbars and combs

    N neutral bars, PE earth bars and phase busbars, combs with a rating and a supply cable. The editor itself flags overloaded busbar terminals.

    • N · PE
    • combs
    • terminals

    DocumentationBusbars and combs

  • Automatic wiring

    Wires route themselves: around the busbars, with no crossings. There is a manual mode, W wire numbering and a potentials panel.

    • auto-routing
    • W numbers

    DocumentationWiring mode

  • Multiple power sources

    Mains, generator, inverter, UPS, solar panels and a battery; ATS and changeover switches, supply to individual poles.

    • ATS
    • generator
    • inverter

    DocumentationPower source roles

  • Panel templates

    Start from a ready-made apartment or house panel instead of an empty rail, and adapt it to your site.

    • apartment
    • house

Checks

  • 100+ automatic checks

    MCB selectivity, overload, cable cross-section, phase balance, neutral, combs and busbars — the error shows up at once, with an explanation.

    • selectivity
    • phase balance
    • neutral

    DocumentationList of checks

  • Required protection

    30 mA RCDs on socket circuits, the RCD type for loads with a DC component, RCD selectivity; for wet areas and bedrooms — once a room zone is set.

    • RCD 30 mA
    • AFDD
    • wet zones

  • Standards regime

    Choose the panel's standards regime in the settings. Checks and clause references follow the chosen regime — for IEC, that is IEC 60364.

    • IEC 60364

    DocumentationPanel standard

  • 5 earthing systems

    TN-S, TN-C, TN-C-S, TT and IT earthing systems: an RCD in a TN-C network is an error, and so is a missing RCD in TT or IT.

    • TN-S
    • TN-C
    • TN-C-S
    • TT
    • IT

    DocumentationEarthing systems

Calculations

  • Short-circuit currents

    Prospective short-circuit current, phase-neutral loop impedance, MCB breaking capacity and the disconnection condition in TN and TT — in the short-circuit panel.

    • Ik
    • Zs
    • Icu
    • TN · TT

    DocumentationShort-circuit current calculation

  • Cables: cross-section and protection

    Current-carrying capacity and recommended cross-section, voltage drop, thermal withstand, correction factors for grouping and temperature.

    • ΔU
    • k²S²
    • grouping

    DocumentationCable system

  • Loads and phase balance

    MCB and phase currents, panel totals, diversity factor, supply capacity margin and motor starting current.

    • phase currents
    • diversity
    • supply

    DocumentationLoad calculation

Documents

Help

  • AI consultant

    Sees your current panel, searches IEC 60364 for the answer and links to the specific clauses.

    • IEC 60364
    • IEC

    DocumentationHow the consultant works

  • IEC reference

    28 sections of IEC standards — with search and links to the clause.

    • search
    • links

    ReferenceIEC 60364

  • Cloud and .eboard file

    Once you sign in, projects are saved to the cloud automatically; a copy in an .eboard file is for archiving or handing over.

    • autosave
    • .eboard

    DocumentationCloud and autosave

How it works

Three actions. One project.

Build the panel, check the connections and save the result.

  1. Build

    Add devices and connect them.

    Demo / moving

    Drag a breaker to a free slot — or select it and press ← →.

  2. Check

    Find the cause and fix it in the project.

    Check result for the demo rail

    • 3 safety errors

      Breaking capacity is below the short-circuit current (6000 A < 6300 A)

    • 1 problem

      «RCD rooms» protects nothing

    • 2 recommendations

      No one has checked the cable cross-section «N (RCD rooms)»

    See the example explained

  3. Export

    Save the diagram and materials.

    Demo panel PDF “Apartment”

    Page “Electrical panel diagram” from the demo panel PDFDetail of the page “Wiring diagram / Connection schedule” from the demo panel PDFDetail of the page “Wiring diagram / Connection schedule” with the connection list from the demo panel PDFDetail of the page “DIN-rail labels” from the demo panel PDFDetail of the page “Equipment specification” from the demo panel PDF

    Panel diagram · wiring diagram · connection list · labels · specification

    Download PDFHow PDF export works

Your next step is in the constructor.

Continue in the constructor

Tools

8 free calculators.

Questions and answers

Before the first module.

Can I design an electrical panel online for free?

Yes. ElectroBoard is free: open the constructor without an account, create your first panel in the browser and check it as you design. An account is needed to save a panel to the cloud and share it. The calculators and reference pages work without signing in.

How do I design an electrical panel online without installing software?

ElectroBoard runs right in your browser — Chrome, Firefox, Safari, Edge. Pick an earthing system and object type, then drag breakers, RCDs and RCBOs onto the DIN rail. It automatically computes phase currents, runs 100+ checks and generates a PDF with the diagram and bill of materials. You can also install it as a PWA on your phone or computer for offline use.

Who is this tool for?

For electricians, designers and students — anyone who needs to design an electrical panel to IEC 60364.

Does ElectroBoard follow IEC 60364?

ElectroBoard runs 100+ checks against IEC 60364 and IEC 61439-1: protection selectivity, cable ampacity, earthing systems, room zones, N-routing, hard invariants (PEN, TT/IT, N isolation between RCDs), terminal overload and supply-source roles — including short-circuit protection on the source side. It is a design tool, not a substitute for official documentation.

Can I export the result?

Yes — a PDF with the panel diagram, a bill of materials, and a .eboard file to hand over to colleagues. You can also share the panel via a link.

How do I calculate voltage drop in a cable?

The basic single-phase formula is ΔU = (2 · I · L · ρ) / S, where I is load current, L is line length, ρ is resistivity (copper ≈ 0.0225 at 70 °C) and S is conductor cross-section. IEC 60364 keeps total voltage drop within roughly 4% (lighting) to 5% (other circuits) from the panel to the farthest load. Instead of calculating by hand, use the online calculators — enter cross-section, length and cable type to get the drop in volts and percent.

How do I draw a single-line diagram of an electrical panel online?

No need to draw by hand: build the panel on a DIN rail and the constructor produces the diagram itself. In the “Export” menu, “EPS diagram” opens the panel's schematic and “PDF panel” saves the diagram together with the bill of materials.

Are my projects stored in the cloud?

Yes. Once you sign in, projects are saved in the cloud and available from any device. You can also save a copy of the panel to an .eboard file.

Does the check replace a specialist's work?

No. This is a design tool: it finds common mistakes, but it does not replace the project documentation or a check by a qualified electrician.

Build your first panel.Continue your project.

From the first module to a finished project.All your panels are in the constructor.

Create a panel for freeMy panels

Works in browser