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Induction Hob & Oven Connection: Choosing Right Cable for 5x2.5, 16.1kW, 230V/400V, 3 Phase

lukasz19988 55404 13
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  • #1 16797835
    lukasz19988
    Level 7  
    Posts: 16
    Rate: 12
    Hello
    I bought a set of induction hob plus an oven (without manual) used equipment
    The plate is connected directly to the oven with cubes
    On Monday, an electrician will come to connect my equipment, I will have to buy a cable to connect
    Is 5x2.5 cable enough
    3 phase home power supply
    Connection power 16.1kW
    he writes only so much on stickers
    Plate: 230 V * 50-60Hz, 230V 6.40 kW
    Oven: max9200 W, 230 / 400V 3N ~, 50Hz
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  • #2 16797841
    karolark
    Level 42  
    Posts: 14341
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    What length of the wire.
  • #3 16797843
    lukasz19988
    Level 7  
    Posts: 16
    Rate: 12
    From the switchgear to the set of 13 m.
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  • #4 16797866
    kosmos99
    Level 38  
    Posts: 4188
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    lukasz19988 wrote:
    Oven: max9200 W

    For sure?
    lukasz19988 wrote:
    Is 5x2.5 cable enough

    It should be enough, but it's better to give 5x4.
  • #5 16797923
    lukasz19988
    Level 7  
    Posts: 16
    Rate: 12
    This is written on the sticker: max 9200 W.
    So it is better to buy 5x4?
    And if in the future I change the equipment, where a 5x2.5 mm cable would suffice, will this 5x4 be able to stay, will I have to forge and introduce a new one?
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  • #6 16797950
    kosmos99
    Level 38  
    Posts: 4188
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    He will be able to stay. If there is to be a plate on the same wire and this oven is the minimum four.
    You have too little power allocation for these receivers.
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  • #7 16798097
    lukasz19988
    Level 7  
    Posts: 16
    Rate: 12
    What are the consequences of a small power allocation to the oven and electrics?
    As for the stove, it probably will not use its full power.
    And an electrician?
    Can they knock out fuses?
  • #8 16798149
    mawerix123
    Level 39  
    Posts: 4150
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    And this 9200 W is sometimes not the power of the whole set :?:
    I do not want to believe that the oven itself is so powerful.
  • #9 16798264
    kosmos99
    Level 38  
    Posts: 4188
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    Rate: 816
    lukasz19988 wrote:
    As for the stove, it probably will not use its full power?
    and an electrician?
    Can they knock out fuses?


    It will be so.
  • #10 16798401
    retrofood
    VIP Meritorious for electroda.pl  
    Posts: 31317
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    lukasz19988 wrote:

    3 phase home power supply
    Connection power 16.1kW
    Where did you get 16.1 kW from?
  • #11 16798438
    michcio
    Electrician specialist  
    Posts: 2597
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    9.2 kW is certainly the power of the whole set. It is barely ~ 13.3 A on a three-phase power supply, hence a 5x2,5 mm ^ 2 cable and 16 A protection will be sufficient. Manufacturers give factory for such equipment most often even 1.5 mm ^ 2 ...
    With an allocation of 16.1 kW also will not be a problem, the pre-meter protection at this power is probably 25 A or the standard.
    It is worth mentioning that recently, for example in the UK, a circuit for electric cookers with a power output, as given by the author of the topic, would be designed and made for a power of even less than 4.5 kW, because this is how the use of power by such devices really looks like. Situations in which all fields are set to max. in the oven all heaters are heating, they do not have a place, and if it is, then it is a short-lived condition that will not lead to heating of cables or release of security.
  • #12 16798541
    lukasz19988
    Level 7  
    Posts: 16
    Rate: 12
    And if I use a 5x4 mm cable for this set, because I have already bought it, it will not be a problem?
    The pre-meter protection is exactly 25 A.
    Here I give the plate and oven model, maybe someone will find the exact data.
    Plate: Ariston model KC 62 D0 1X
    Oven: Ariston HO 87 EF.1 IX
  • #13 16798614
    kosmos99
    Level 38  
    Posts: 4188
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    Rate: 816
    michcio wrote:
    It is worth mentioning that recently, for example in the UK, a circuit for electric cookers with a power output as given by the author of the topic would be designed and made for power even smaller than 4.5 kW


    Like the west and such numbers ...

    lukasz19988 wrote:
    and if he uses a 5x4mm cable for this set? because I have already bought one, it will not be a problem?


    You can apply.
  • #14 16798764
    Akrzy74
    Rest in Peace  
    Posts: 7910
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    Department announcements link


    I close.
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Topic summary

✨ The discussion revolves around the appropriate cable choice for connecting an induction hob and oven with a combined power requirement of 16.1 kW on a 3-phase supply. The user inquired if a 5x2.5 mm² cable would suffice, given the oven's maximum power of 9200 W and the hob's 6400 W. Responses suggest that while a 5x2.5 mm² cable may be adequate, a 5x4 mm² cable is recommended for better power allocation and future-proofing against potential equipment upgrades. Concerns were raised about the consequences of insufficient power allocation, including the risk of tripping fuses. The user confirmed the models of their appliances: Ariston KC 62 D0 1X for the hob and Ariston HO 87 EF.1 IX for the oven.
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FAQ

TL;DR: For a combined induction hob + oven labeled 9.2 kW on 3‑phase, the load is about 13.3 A; “5×2.5 mm² with a 16 A breaker will be sufficient.” [Elektroda, michcio, post #16798438] Why it matters: This FAQ helps DIYers and homeowners pick the right 5‑core cable and protection for a hob+oven on 230/400 V 3‑phase without nuisance trips.

Quick Facts

Is 5×2.5 mm² cable enough for a 9.2 kW hob + oven on 3‑phase?

Yes. At ~13.3 A three‑phase load, a 5×2.5 mm² circuit with a 16 A breaker is suitable. The forum expert noted manufacturers often supply even 1.5 mm² tails on such appliances. “5×2.5 mm² and 16 A protection will be sufficient.” [Elektroda, michcio, post #16798438]

Should I choose 5×4 mm² instead for extra safety or future upgrades?

Upsizing to 5×4 mm² is acceptable and offers thermal and upgrade headroom. One expert advised, “It should be enough, but it’s better to give 5×4.” If you already bought 5×4, you can use it without drawbacks. [Elektroda, kosmos99, post #16797866]

If I later replace the appliances with lower‑power units, can 5×4 mm² stay?

Yes. Thicker conductors remain compliant when loads decrease. The responder confirmed the 5×4 mm² can stay in place even if future equipment needs only 5×2.5 mm². [Elektroda, kosmos99, post #16797950]

Is 9.2 kW the oven alone or the entire set?

It refers to the total for the hob plus oven. A contributor clarified 9.2 kW is the whole set, which aligns with the calculated ~13.3 A three‑phase draw. [Elektroda, michcio, post #16798438]

What happens if my allocated supply is too small—will fuses trip?

Yes. With insufficient allocation or other household loads, overcurrent devices can operate during heavy cooking. As one expert warned, “You have too little power allocation for these receivers.” [Elektroda, kosmos99, post #16797950]

Do I need 25 A main protection for this installation?

A user reported 25 A pre‑meter protection with this setup. That aligns with the 9.2 kW diversified cooking load. Confirm your actual service rating with your utility or electrician. [Elektroda, lukasz19988, post #16798541]

Does a 13 m cable run change the cable size recommendation?

In the discussed case, 13 m was fine with 5×2.5 mm² and a 16 A breaker because current is ~13.3 A. Voltage drop and installation method still need an electrician’s check on site. [Elektroda, michcio, post #16798438]

How do I wire a 230/400 V 3N~ oven and an induction hob together?

Follow the nameplates. Both appliances were factory‑linked via terminal blocks in the case study. Ensure a qualified electrician terminates the 5‑core supply and sets correct links per 3N~ diagrams. [Elektroda, lukasz19988, post #16797835]

Quick how‑to: picking a cable for a hob + oven on 3‑phase?

  1. Read both nameplates and note total kW and 230/400 V 3N~.
  2. For ~9.2 kW on 3‑phase, choose 5×2.5 mm² with a 16 A breaker or upsize to 5×4 mm².
  3. Have a licensed electrician verify protection, links, and terminations. [Elektroda, michcio, post #16798438]

Will running all zones and the oven at max overheat the cable?

Unlikely under correct design. Cooking loads cycle; diversity reduces sustained current. One expert noted similar UK circuits are designed for <4.5 kW because full simultaneous use is rare and brief. [Elektroda, michcio, post #16798438]

What does “5×2.5” mean in cable sizing?

It denotes five conductors, each 2.5 mm² cross‑section, commonly used for 3‑phase plus neutral and protective earth. The thread discusses choosing 5×2.5 for a 3‑phase hob and oven. [Elektroda, lukasz19988, post #16797835]

Is my stated 16.1 kW connection power relevant here?

Treat it cautiously. A moderator challenged the 16.1 kW figure and asked its source. Rely on appliance nameplates and verified service ratings instead. [Elektroda, retrofood, post #16798401]

Can 5×4 mm² solve nuisance tripping on cooking peaks?

A larger cable lowers voltage drop and conductor heating but does not raise your service limit. Trips come from protection settings and total demand. Use 5×4 mm², but review allocation if trips persist. [Elektroda, kosmos99, post #16798614]

Are these models relevant: Ariston KC 62 D0 1X hob, HO 87 EF.1 IX oven?

Yes. The poster shared these models and confirmed a 25 A service. The advice remained: 5×2.5 mm² with 16 A protection is adequate; 5×4 mm² is also fine. [Elektroda, lukasz19988, post #16798541]

Could the oven really be 9.2 kW by itself?

Unlikely per the discussion. A user questioned that label, and another clarified the 9.2 kW applies to the entire set, not the oven alone. [Elektroda, mawerix123, post #16798149]

Will an electrician likely trip the fuses during commissioning?

Under‑allocated service or simultaneous heavy loads can trip fuses during tests. One reply to the OP confirmed this outcome when asked about tripping. [Elektroda, kosmos99, post #16798264]
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