Guide · Extraction, light and power
The electrical supply an induction kitchen needs
The KÜINA team · Updated October 11, 2026
The short answer
An induction hob needs a dedicated circuit, not a shared one: Spanish wiring regulations reserve a 25 A circuit in 6 mm² cable for hob and oven. And it needs contracted power: on a 3.45 kW supply, an induction hob and an oven together will trip it. 4.6 kW or more is normal.
Three things to check
- Is there a dedicated kitchen circuit? Look at the consumer unit: there should be a breaker assigned to hob and oven. If the kitchen hangs off the same circuit as the living room sockets, a new one has to be run.
- What size is the cable? The regulations call for 6 mm² on that circuit. In installations from the seventies or eighties you commonly find 2.5 or 4, which is not enough.
- How much power do you have contracted? It is on the electricity bill, in kW. On 3.45 kW an induction hob at full output plus the oven plus the dishwasher will trip the limiter, and that is what tends to happen the first Sunday you have guests.
The circuits a kitchen needs
| Circuit | What for | Rating | Cable |
|---|---|---|---|
| C3 | Hob and oven | 25 A | 6 mm² |
| C4 | Washing machine, dishwasher and water heater | 20 A | 4 mm² |
| C5 | Worktop and bathroom sockets | 16 A | 2.5 mm² |
| C1 | Lighting | 10 A | 1.5 mm² |
A modern kitchen needs at least those four. What you find in many older flats is one or two for everything, and no induction hob runs happily on that.
What each appliance draws
| Appliance | Typical draw |
|---|---|
| 60 cm induction hob at full output | 3,700 W, some up to 7,400 |
| Oven | 2,000 – 3,500 W |
| Dishwasher, on the heating cycle | 1,800 – 2,200 W |
| Microwave | 1,000 – 1,500 W |
| Fridge | 100 – 250 W |
| Extractor | 150 – 300 W |
Add hob and oven and you are already at 6 or 7 kW, which is more than most homes have contracted. That is why almost every induction hob has power management: a setting in the menu where you tell the appliance the maximum kW it may draw, and it shares that between the zones. It ships set high; it is worth adjusting on fitting day, not the first time the power trips.
If the wiring is old
| What has to be done | Approximate cost |
|---|---|
| New circuit from the consumer unit to the kitchen | €300 – 800 |
| New consumer unit with its protective devices | €400 – 900 |
| Increasing the contracted power | Depends on the supplier; there is usually a connection charge |
| Installation certificate | €100 – 250 |
The certificate is required if you increase the contracted power or if the supplier asks for it. It is a document signed by a registered electrician, and it is worth asking for even when nobody demands it: it is what proves the work was done properly if there is ever a problem.
Sockets, which get decided on the plan
This part is not regulation, it is experience. These are the ones people wish they had:
- At least two free double sockets on the worktop, spread out rather than both in one corner.
- One inside the extractor unit, so there is no cable on show.
- One inside a drawer or a cupboard if you want to charge a phone or leave a food processor plugged in out of sight.
- One in the island or peninsula, if there is one. Afterwards it means a cable across the floor.
- One for the fridge you can reach without moving it, ideally in the neighbouring unit.
- No sockets behind the oven or the dishwasher: they go in the adjacent unit, because you cannot reach behind.
Questions we get asked
Do I need more contracted power for induction?
Usually yes, if you are on 3.45 kW. On 4.6 kW you can manage by setting the hob power management; on 5.75 or more it is not something to think about. Check the bill before asking anyone for a quote.
Can I plug an induction hob into a normal socket?
No. An induction hob connects to its own circuit, not to a standard socket outlet. Doing otherwise is a hazard and voids the appliance guarantee.
What if my wiring is 2.5 mm²?
A new circuit in 6 mm² has to be run. That is €300 to €800, and it is work done on the same day as the kitchen: leave it for later and the walls have to be opened again.
Does hob power management stop me cooking normally?
Almost not at all. It caps the total the zones can draw at once, so if you put all four on maximum, the appliance shares it out. In normal use you do not notice.
Shall we look at it with your kitchen on screen?
An hour in the showroom, your kitchen on screen and the price fixed the same day. No commitment, and no follow-up calls unless you want them.
