Try it
Your turn to wire.
A mini-Vonkcad, right here in your browser. Place symbols on the plan: the board, the single-line diagram and the GREI check follow live.
- Drag a symbol onto the plan
- Tap a switch to turn the light on
- Fix the findings in one click
Playground: a mini-Vonkcad
Click on a switch: the lamp lights up. Drag off the plan to remove.
Single-line diagram
Redrawn with every symbolGREI check
—Board and circuits
This playground uses the software’s values and symbols: 2.5 mm² / 20 A for sockets, 1.5 mm² / 16 A for lighting, 6 mm² / 32 A for cooking (table 4.11), 8 socket outlets at most per circuit.
The full software
You’ve just done a bit of it.
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01
On your real plans.
PDF, image, DXF or DWG, calibrated to scale. Every room, every floor, the wiring routed along the walls.
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02
GREI Book 1, 2026 version.
The 4 Belgian network systems, new and existing, dedicated circuits, voltage drop, solar PV and EV chargers.
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03
Right to the file.
3D board, 3D house, bill of materials and PDF inspection file, for the inspector, the client or yourself.
Do all the rest.
Vonkcad is free during the beta. Create your account, request access, and tell us what you’re missing.
Socket
Double socket
Switch
Two-way switch
Light point
Hob
Sockets
Lighting
Cooking
Living room
Kitchen
Circuit {l} “{nom}”
More than 8 sockets on a circuit
{c}: {n} socket outlets (maximum 8 per final circuit, a multiple socket outlet counts as one).
Split over {n} circuits
Dedicated cooking circuit required
{c}: the hob must be supplied by a dedicated circuit.
GREI 5.2.1.2: washing machine, dishwasher, tumble dryer, cooker, hob, oven and any fixed appliance of 2600 W or more each have a dedicated circuit.
Put on a dedicated circuit
Single two-way switch: two are needed
{c}: single two-way switch ({n}). Two-way switches always come in pairs, possibly with intermediate switches between them.
Add the second two-way switch
Cooking must be behind a 30 mA RCD
Circuit outside a row
Main board: {n} circuits ({l}) are not behind a row 30 mA RCD.
Main board: 1 circuit ({l}) is not behind a row 30 mA RCD.
New installation: provide one 30 mA RCD per row.
One 30 mA RCD per row
{piece} sockets
Placed in the {piece}: {k}.
Removed from the plan: {k}.
{p}: switch on or off
On the 300 mA
{n} / 8 outlets
+ hob
{n} light points
{n} light point
{n} controls
{n} control
{n} hobs
Hob · 7,200 W
Place a symbol on the plan: its circuit appears here.
{n} circuits
{n} circuit
{n} non-compliances
{n} non-compliance
Compliant
Fix all ({n})
Fix: {fix}
No findings
Nothing to check
Add a ninth socket or a hob in the kitchen…
Place symbols on the plan.
Simplified single-line diagram: {n} circuits
Fixed: {fix}.
All findings are fixed.
{piece} lighting on.
{piece} lighting off.
No light point in the {piece}.
Place a light point in the {piece}.
Tap the plan to place: {k}
Drag a symbol onto the plan
Place the symbol in the living room or the kitchen.
Plan reset to the start.
Your turn: drag a symbol, or fix the findings.