How to Sketch Your Own Wiring Plan — Before You Call an Electrician
Not 'why plan' but HOW — this is the concrete method for drawing your home's points-and-circuits map on one sheet of paper. You sketch and think it through; the electrician executes and signs off.
The DIY mapping method in 4 steps
Walk each room and list the points
Pencil and paper (or a simple floor plan) in hand, go room by room and note where you need lighting, sockets, and where heavy appliances will sit — oven, stove, EV charger, heat pump, or sauna.
Group the points into logical circuits
Separate lighting from sockets — if one circuit trips, the other keeps working. Heavy appliances usually get their own dedicated circuit. The exact circuit count and breaker rating is always confirmed by an electrician.
Mark spare spots for future smart-home wiring
On your sketch, mark where an extra conduit might help for a KNX line or network cable (UTP) — even if automation is still just a theoretical idea. Plan power and data routes separately to avoid interference.
Hand the paper plan to a certified electrician
Your sketch is the starting point for a conversation, not an execution document — the electrician checks loads, calculates circuits, builds the consumer unit schedule, and does the actual installation.
What to include on your paper plan
sheet per room
A simple sketch with points, circuits, and spare spots — that's all an electrician needs to understand your idea.
Room by room — a list of points
For each room, write down where lighting, sockets, and heavy appliances go. Nothing is too small to note.
The circuit-grouping logic
Lighting separate from sockets, heavy appliances on their own circuit — this logic, not exact numbers, is what you can decide for yourself.
A rough consumer unit schedule
List which circuit serves what, and leave a note for 'spare for the future' — the exact number of spare ways is set by the electrician based on the board size.
Routes: power kept separate from data
Sketch where conduits might run — power and low-voltage/data (KNX, UTP) routes are best kept apart to avoid interference.
Spots for spare conduit
Mark walls or corners where you might one day want an extra KNX line, UTP cable, or sensor — a cheap decision now, an expensive job after the walls are finished.
What to bring to the electrician
Your paper plan becomes genuinely useful once it includes these pieces.
- {'t': 'A room list with every point', 'd': 'Lighting, sockets, and heavy appliances — noted separately for each room, so nothing gets forgotten.'}
- {'t': 'A circuit-grouping sketch', 'd': 'Shows which points you think could share a circuit, and which should be separate.'}
- {'t': 'Marked spare spots', 'd': 'Places where an extra conduit could help for a future KNX line or network cable.'}
- {'t': 'Questions for the electrician', 'd': "A list of things you don't want to forget to ask — for example, whether an idea is even technically feasible."}
- {'t': "Room for the electrician's notes and sign-off", 'd': 'The electrician checks, adjusts, and confirms your idea — the plan becomes a shared document, not just yours.'}
Frequently asked questions
Does my paper plan replace an electrician's design?
No. Your sketch is the basis for a conversation and an idea — an electrician or designer checks it, calculates loads and circuits against regulations, and prepares real execution documentation.
How detailed does my plan need to be?
A simple room layout marking points (lighting, sockets, heavy appliances) and spare spots is enough. The clearer your idea, the faster an electrician can give you a precise answer.
How do I know how many circuits I'll need?
That can't be answered without concrete calculations — circuit count, breaker rating, and RCD type always depend on the actual load and national wiring rules. That's a certified electrician's or designer's job, not a DIY guess.
Should I mark spots for KNX or network cable if I'm not sure about a smart home yet?
Yes, it's worth it. A spare conduit that stays empty costs almost nothing extra, while drilling into a finished wall later is expensive and disruptive.
How is this page different from 'Wiring Planning Before Renovation'?
That page explains why and when planning is needed — a general overview. This page is the concrete method for sketching your own points-and-circuits map on paper, which you then hand to an electrician.
Ready to sketch your plan but want a second opinion?
Book a consultation — we'll help you review your paper plan and figure out what to clarify before the electrician's visit, honestly and without any sales pressure.