Technology
How doWired reads a plan and knows it got the numbers right
Symbol recognition on a drawing has been sold around the world for well over a decade and settles nothing on its own. The value starts where the geometry you read turns into a number somebody can sign off. This is that path.
Data path
From pixels to a conductor cross-section
- 01A vector outline of the floor
Reading the image
The plan goes into image analysis: wall lines, window and door openings, room labels. From PDF and DWG we take the vector geometry; from a photo or a scan we rebuild it from the raster.
- 02Rooms with floor area in m²
Scale and rooms
Scale comes off the dimensions on the drawing, and when there are none you calibrate it with a single reference line. Closed outlines become rooms with floor area, because floor area drives both the number of points and the estimate.
- 03A supply graph for the whole building
The installation model
Points, circuits and boards live in one graph: every point knows its circuit, every circuit knows the busbar feeding it. That graph, not the drawing, is the source of truth for every document.
- 04Length of every circuit in metres
Cable routes
A cable route is the shortest path along wall and slab axes, passing through openings, not a diagonal across the room. Circuit length is the sum of its edges in that graph.
- 05Cross-section, protection and the reason
Cable sizing
Cross-section and protection follow current-carrying capacity, voltage drop and maximum circuit length under PN-HD 60364. When a route comes out too long, doWired steps the cross-section up once and says which of the three conditions decided it.
- 06Board layout and diagram
Distribution board
Devices land on the rail to the nearest module. Width, pole count, rail capacity and phase balance are all checked. The supply structure becomes a single-line diagram in PN-EN 60617 symbols.
Standards and conventions
What we measure against
PN-HD 60364
The low voltage installation standard. Current-carrying capacity, voltage drop, disconnection times and the conditions for automatic disconnection of supply all come from it. It decides whether 1.5 mm² holds over that length.
PN-EN 60617
The set of graphic symbols for electrical diagrams. It is why a doWired drawing reads like one from a design office, with no legend explaining private notation.
TN-C-S and TN-S
A building is usually fed as TN-C-S, and past the main board the installation runs as TN-S. doWired knows that boundary, because it decides where PEN splits and what the final circuits look like.
A model, not an export
Documents are not exports of the drawing, they are views of the same model. That is why changing a cable route moves the estimate, and moving the board moves the diagram.
Limits
What we calculate and what we will not calculate for you
A short list, so nobody discovers it at handover.
We calculate
- Current-carrying capacity and conductor cross-section
- Voltage drop on a circuit and maximum circuit length
- Load balance and the split across three phases
- Device selection and rail occupancy in modules
- Route length of every circuit from the drawing geometry
- Material and labour cost with your own markups
We do not
- Short-circuit currents at the connection point or main protection sizing
- Full discrimination between protective devices
- Lightning protection and equipotential bonding
- Acceptance testing and the reports that come with it
- Approvals and the signature on the documentation
Reads well on paper. Try it on your own plan.
People on the early access list get the product before 1 February 2027, along with a request for an honest opinion.