Oven connection in Warsaw — electrics, safety, and what to expect

You’ve bought a built-in oven, but the wall socket is on a shared circuit with the kettle and microwave. Sound familiar? An oven draws 2.5–3.5 kW, and plugging it into a regular outlet via an extension lead is a straight path to overheated wiring. You need a dedicated line from the distribution board, its own circuit breaker, and a proper socket behind the unit. That’s exactly what we do on site across Warsaw — from Ursynow to Targowek.

Important: connecting an oven means working with electrics at up to 3.5 kW. If you’re unsure about the state of your wiring or don’t know which breaker is in your panel — don’t experiment. Call a professional; this is a safety matter.

How much does it cost and what affects the price

The cost depends on whether a dedicated line already exists or a cable needs to be run from the distribution board. If the socket is in place and a breaker is installed, the work takes 30–40 minutes. If wall chasing, running a 2.5 mm² or 4 mm² cable, and fitting a separate breaker are required, it becomes a full electrical installation job. Fixings are included; cables and breakers are charged separately. Current prices for all electrical services are in the table below.

What’s needed for a proper connection

• A dedicated line from the distribution board — NYM or YDY 3×2.5 mm² cable (for ovens up to 3.5 kW) or 3×4 mm² (if the wattage is higher).
• A circuit breaker rated at 16A (for 2.5 mm² cable) or 20A (for 4 mm²) — strictly matched to the cable cross-section.
• An earthed socket — installed behind the furniture niche or beside it, so the plug isn’t crushed.
• Earthing — mandatory. Polish new-builds have it; older buildings (kamienice) sometimes don’t.
• A 230V single-phase oven is standard for domestic models. Three-phase connection is not required for ovens.

How the on-site work goes

1. You send a photo of the niche, the distribution board, and the oven model — the technician assesses the scope.
2. We agree on a time — usually same-day or next-day.
3. On site, the technician checks the panel: is there a spare breaker, what cable size runs to the kitchen.
4. If no dedicated line exists, a cable is run from the panel to the installation point and a breaker is fitted.
5. A socket is installed in the right spot (behind the niche or to the side of the unit).
6. The oven is connected, earthing is checked, and a test heating cycle is run.
7. Clean-up follows, plus an explanation of which breaker serves the oven and what to do if it trips.

Common mistakes when connecting an oven

• Plugging into a regular socket on a shared circuit — the breaker trips when several appliances run at once.
• Using an extension lead or splitter — contacts overheat, plastic melts.
• Running 1.5 mm² cable instead of 2.5 mm² — the wire can’t handle the load and overheats inside the wall.
• Connecting without earthing — if insulation fails, the oven body becomes live.
• Mounting the socket directly behind the oven — the plug hits the back wall and the unit won’t fit into the niche.
• Not checking whether the main breaker can handle the extra load — switching the oven on blacks out the entire flat.
• Joining aluminium wiring to copper cable without proper connectors — oxidation, arcing, fire risk.

What to prepare before the technician arrives

• Find out the exact oven model and its wattage (shown on the rating plate or in the manual).
• Photograph the distribution board — the technician needs to see what breakers are already fitted.
• Check whether there is a free slot in the panel for a new breaker.
• Show where the oven will go — the technician will estimate cable length.
• If the kitchen is still being renovated, this is the ideal time to run the cable before finishing the walls.
• Ensure access to the panel (it’s sometimes on the stairwell landing — a key may be needed).
• Clear the kitchen cabinets near the niche — the technician needs workspace.
• Clarify the wall type (concrete, brick, plasterboard) — it affects routing method.
• Provide building access details: intercom code, parking info.

A real case from Warsaw

A client in the Wola district bought a built-in Bosch oven rated at 3.4 kW. The kitchen had one socket on a 1.5 mm² circuit shared with the fridge and microwave. The first time the oven was switched to full power, the 10A breaker tripped. The technician ran a separate NYM 3×2.5 mm² cable from the panel, fitted a 16A breaker, and brought the socket out to the side of the niche so the plug wouldn’t block the unit. Wall chasing took about an hour; the remaining work took another hour. After connection, the oven ran steadily at maximum heat without tripping. The client admitted he’d never even thought the kitchen socket couldn’t handle an oven.

Frequently asked questions

Can I plug the oven into a regular socket?
Only if that socket is on a dedicated line with at least 2.5 mm² cable and a 16A breaker. If other appliances share the circuit — no, a separate line is needed.

Is earthing required?
Absolutely. An oven is a high-power appliance with a metal body. Without earthing, a fault could make the casing live.

What cable is needed?
For ovens up to 3.5 kW — NYM or YDY 3×2.5 mm². For higher wattage — 3×4 mm². The technician selects the exact size based on the appliance rating.

Can the oven and induction hob share one circuit?
No. An induction hob draws 7–8 kW, an oven up to 3.5 kW. Each appliance needs its own line and breaker.

How long does the connection take?
If the line is ready — 30–40 minutes. If a cable needs running from the panel — 2–4 hours depending on route length and wall type.

What’s included in the price?
Labour, fixings, travel within Warsaw. Cable, breakers, and sockets are charged separately.

Do you work in older buildings without earthing?
Yes, but we recommend fitting an RCD (residual current device) in such cases — it protects against electric shock.

Who does the work

Oven connections are carried out by technicians with hands-on electrical installation experience. We cover all of Warsaw and nearby suburbs. Minimum order — from 200 zl. Call or message us — we’ll assess the job from photos and quote a price before the visit.