Power socket installation 230/400V in Warsaw — for hobs, ovens and equipment

Bought an induction hob but there’s only a standard 16 A socket on the wall? Or you need to connect an electric oven, air conditioner, or workshop equipment — and there’s no dedicated wiring for it? A power socket rated at 230 or 400 V solves the problem. But installing one yourself without understanding the consumer unit layout and cable sizing is risky. We work across all of Warsaw: from Ursynow to Zoliborz, arriving with a tester, tools, and the right cable.

Important: work on 230/400 V power lines carries a risk of electric shock and fire. If you are unsure about the condition of the wiring or consumer unit — do not attempt to connect anything yourself. Call a professional.

How much does it cost and what affects the price

Current prices for all electrical installation work are in the table below. The cost of installing a power socket depends on several factors: whether a new cable needs to be run from the consumer unit or the point is already prepared, the socket type (single-phase 230 V or three-phase 400 V), and whether there is a spare breaker in the consumer unit. Fixings are included in the labour cost. Cable, socket, and breaker are charged separately if the client hasn’t purchased them in advance.

Types of power sockets and when each is needed

Single-phase 230 V (16 A or 20 A) — suitable for most household appliances: an oven up to 3.5 kW, an induction hob up to 3.7 kW, a powerful kettle, or a heater. Looks like a regular socket but with earthing, connected to a dedicated breaker via a 2.5 or 4 mm2 cable.

Single-phase 230 V (32 A) — for high-power single-phase loads: an induction hob up to 7 kW, an electric cooktop, or an industrial heater. Requires a 6 mm2 cable and a dedicated 32 A breaker.

Three-phase 400 V (16 A or 32 A) — needed for equipment rated from 5 to 22 kW: a three-phase induction hob, workshop machinery, a compressor, or a powerful air conditioning unit. Connected with a five-core cable (3 phases + neutral + earth). Three-phase supply is not always available in Warsaw apartments — it needs to be checked.

If you’re not sure which type you need — send a photo of the appliance’s rating plate (the label with the wattage on the back). Our technician will determine whether a single-phase line is sufficient or three-phase is required.

How the on-site work goes

1. You describe the task: which appliance needs connecting, and send photos of the consumer unit and installation location.
2. The technician determines the socket and cable type, gives an approximate price.
3. On site — inspection of the consumer unit: is there a spare breaker, what’s the supply cable size, is there enough capacity.
4. Cable is run from the consumer unit to the point: in trunking, chased into the wall, or behind skirting — depending on conditions.
5. A breaker (or RCBO) is installed in the consumer unit and the cable is connected.
6. The power socket is fitted and tested with a multimeter: voltage, earthing, correct phase rotation.
7. The appliance is test-run, and cable and connection temperatures are monitored for 10–15 minutes.

Safety requirements

This is not a regular socket. A power line carries many times the load of a standard circuit. Wiring mistakes lead to melted contacts, short circuits, appliance damage, and fire. Minimum requirements:

• A dedicated circuit breaker (or RCBO) in the consumer unit — the line must not be shared with lighting or other sockets.
• Cable strictly matched to the rating: 2.5 mm2 for 16 A, 4 mm2 for 20 A, 6 mm2 for 32 A. Undersized cable = overheating.
• Earthing is mandatory — we do not connect without it. If the property has no PE conductor, that is a separate job.
• For three-phase lines — correct phase sequence. Incorrect wiring can damage motors (compressors, fans).
• All connections via terminals (WAGO, screw-type). Twisted joints on power lines are unacceptable.
• After installation, multimeter testing and a load test run are mandatory.

Common customer mistakes (and how to avoid them)

• Plugging an induction hob into a standard 16 A socket — the breaker trips when two burners are switched on.
• Buying the wrong socket type: choosing a domestic CEE 7/5 when a power-rated CEE 7/4 with earth or an industrial IEC 60309 is needed.
• Running 2.5 mm2 cable on a 32 A circuit — the cable overheats, insulation melts.
• Connecting a power socket to the same breaker as other loads — circuit overload.
• Forgetting earthing — the appliance gives electric shocks, and there is no protection in a fault.
• Trying to connect a three-phase hob to single-phase supply without switching the terminal links — the hob runs at a third of its power or won’t start at all.
• Not checking the flat’s supply capacity — installing a 32 A breaker when the incoming supply is rated for 25 A. The main breaker trips.

What to prepare before the technician arrives

• Photograph the inside of the consumer unit and send it to the technician — we need to see the breakers and any spare ways.
• Find the appliance manual or rating plate — we need the power (kW) and connection type (1-phase / 3-phase).
• Decide on the socket location — usually behind the hob or under the worktop.
• Check whether the consumer unit is accessible — sometimes it’s in the stairwell or a locked recess.
• Find out if you have three-phase supply (if 400 V is needed) — look at the main switch: if it has three levers, it’s most likely three-phase.
• Clear the path from the consumer unit to the socket location — the technician will need to run cable.
• If chasing is needed — let us know. It’s dusty work; cover furniture and appliances.
• Provide access details: intercom code, key, parking info.
• If there are small children in the flat — let the technician know; they’ll take extra care with the consumer unit.

A real case from Warsaw

A client in Mokotow bought a 7.4 kW Bosch induction hob. The flat only had a standard 16 A socket wired with 2.5 mm2 cable. The breaker tripped whenever three burners were on. Our technician inspected the consumer unit — there was space, and the supply was three-phase. We ran a dedicated 5×2.5 mm2 cable from the consumer unit for a three-phase connection and fitted a 16 A RCBO across three phases. The socket was installed behind the hob in a back box. We switched the terminal links on the hob’s connection block to three-phase mode. After connecting, all phases were tested, and the hob was run at full power — everything stable, no cable heating. The job took about 3 hours. Takeaway: before buying high-power appliances, check what supply your flat has and whether there is enough capacity.

Frequently asked questions

How is a power socket different from a regular one?
It’s rated for a higher load — 20 to 32 A — and connected via a dedicated cable to its own breaker in the consumer unit. A regular socket is 16 A on a shared circuit.

Does an induction hob need a three-phase socket?
It depends on the model. Hobs up to 3.7 kW work on single-phase. Hobs from 5 kW are better connected to three phases — the load is distributed evenly and the cable can be thinner.

Can a power socket be installed without chasing?
Yes, if the cable is run in surface trunking or behind the kitchen units. It’s faster and cheaper.

What’s included in the price?
Socket installation, connection at the consumer unit, and line testing. Fixings are included. Cable, socket, and breaker are charged separately.

How quickly can you come?
Usually the same day or the next. Urgent call-outs have a surcharge. We cover all of Warsaw.

Do you offer a warranty on electrical work?
Yes, on the workmanship. Cable and components carry the manufacturer’s warranty.

Can I buy the cable and socket myself?
Yes, but confirm the type and size with the technician before purchasing. The wrong cable means redoing the job.

Can an oven and hob share one socket?
No. Each high-power appliance needs its own dedicated line and breaker. This is a safety requirement.

Who does the work

Electrical installation is carried out by technicians with hands-on experience in power connections. We cover all of Warsaw and nearby suburbs. Minimum order — from 200 zl. To book, call or message us — we’ll reply within an hour and advise on what to prepare before the visit.