Pre-wiring motorised blinds while the property is open saves pain later. It takes a bit of time now and avoids ripping into finished walls when you want the blinds automated.
1) Define the wiring target
Be clear about what the wiring needs to support. That might be simple timed open and close, voice control, a smart home hub, or full building automation. My basic test is simple: the blinds get reliable power, and they can be controlled by a networked controller later without starting again.
The usual setup I aim for is one Cat6a to each blind location for data or PoE-capable kit, one power run of 16/2 or 16/4 depending on the motor, about 1 metre of spare cable at each end, and labelled terminations at a central plate. If voice control or scheduled automation matters, route it back to the comms cupboard or hub location.
2) Get the right people on the right side
Split the work cleanly. I put an electrician on the power side and a cabling person or DIYer on the data side. The electrician decides mains versus low-voltage runs and the compliance side. The cabling person handles Cat6a, routing, and patching into the network switch. If someone else will fit the blinds later, get them involved early so their motor and control choice drives the wiring.
Pick one person to make decisions when there is a trade-off. That stops the job drifting. If you are doing it yourself, own the labelling, testing, and paperwork.
3) Tie the work to clear stages
Set the wiring against the build stages, not against wishful thinking.
- Rough-in during demolition or first fix.
- Cable pulls and labelling on second fix.
- Electrical sign-off before plastering where mains are involved.
- Data termination and testing once the walls are closed.
The useful checkpoints are simple: cables pulled, spare cores coiled and labelled, junction boxes fitted, electrician sign-off, Cat6a patched into the switch. Test at each stage. A failed cable test at final snagging is just tedious.
4) Split the tasks and buy the bits early
Keep the jobs separate by skill.
- Electrician: mains provisioning, final connections, consumer unit space.
- Cabler: Cat6a runs, patch panel labels, continuity testing.
- Builder or plasterer: protect conduits, leave access panels.
- You: make the calls, keep a simple spreadsheet of cable IDs and locations.
I order the materials before the work starts: Cat6a bulk cable, spare 16/2 and 16/4 runs, blank wall plates, modular back boxes, and a box of cable labels. A cheap cable tester is worth having. If PoE is part of the plan, get a PoE-capable switch with spare ports.
5) Deal with the main risks
The big risks are the wrong cable, not enough power, and awkward access once the blinds are fitted. The fixes are straightforward:
- Run both data and power. Cat6a plus a power run covers most future setups.
- Use 16/4 instead of 16/2 where you expect more control options or dual-motor heads. It gives two extra conductors for separate feeds or sensors.
- Protect the runs with conduit and keep junction boxes accessible. A small chase or conduit is far easier than digging out plaster later.
- Label both ends with a durable ID and record it in the wiring spreadsheet.
If mains work is needed, book an electrician early. Do not guess on cable rating or breaker sizes.
6) Keep one place for decisions
Use one shared document and keep it short. I would rather have one decent cable map than a pile of half-remembered messages. Put the diagram and cable list in the document and share it with the electrician and the person fitting the blinds later.
At handover, give them a photo of the exposed routing, the cable spreadsheet, and a list of terminated ports in the comms cupboard. If anything changes on site, update the document straight away. That is what stops rework.
7) Sign it off before the walls close
Use a short checklist before anything disappears behind plaster:
- Cat6a run to each blind checked with continuity and pair tests.
- Power runs checked and marked for their intended use, mains or low-voltage.
- Spare cores present and coiled in a junction box or attic space.
- Junction boxes accessible and labelled.
- Electrical work certified by the electrician if required.
I would also have the installer look at the sign-off list. That is where compatibility issues show up, not after the walls are finished. Keep photos of the terminations and the test results with the handover pack.
Practical wiring choices
- Run at least one Cat6a to each blind location. It gives data, possible PoE, and some room for future changes.
- Run a power cable as well. If simple motors are expected, 16/2 may be enough. If you want dual motors, separate feeds, or extra control lines, use 16/4.
- If there will be no wall switches, run an extra Cat6a or a small control cable so a relay or controller can be fitted later without opening the plaster.
- Leave 0.5–1 metre of slack coiled in an accessible void. Terminate it neatly in a labelled box.
Final take
Pre-wiring blinds is a small job that becomes a nuisance if it is done badly. Cat6a plus a sensible power run covers most cases. Use 16/4 where flexibility matters. Protect the routes, label everything, and get an electrician to confirm any mains work. That is a lot less annoying than cutting into a finished wall later.
