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Ovens on cooker ccts

In domestic kitchens, what do you think of the practice of connecting ovens to 32/40A cb cooker ccts via dual cooker connection outlet plates? For example, along with a 6kw hob, a 2.5kw oven is connected via a 1.5mm2 3 core h/r flex? One view is that it's acceptable because the flex can't be overloaded and the cb provides s/c protection for the flex, nor would it be coded on an eicr.


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  • Well, I disagree because I do not think you are correct.

    If there is no difference between the internal wiring of ovens and cookers then demanding lower OPD ratings for ovens is not valid.


    Nothing to do with polo wrappers, the ovens are sold in the UK therefore the manufacturer knows about 32A circuits for cookers.

    Why do you not suggest cookers should be on two 16A circuits as they would be in Europe?

    To design a cooking appliance that cannot be connected to a standard UK 32A circuit without extra protection is negligent.


    If we are talking about ring circuits then they know it will have a 13A plug; to demand a 16A OPD is also negligent.

    If we are talking about cooker circuits then they know it might be 32A which is apparent by the terminal links and instructions for cookers.


    You seem to be confusing the fixed wiring and appliance wiring and clutching at straws - I thought the problem was affording 16A protection on 32A circuits.

    If a cooker is alright on a 32A circuit then so is an oven. If you think a larger flex on the oven is required (it likely isn't) then that is a lot easier than down-fusing a cooker circuit - especially for two ovens.


    The OPD is for protecting the fixed wiring, not the appliance. If a manufacturer demands a lower rated OPD than the normal circuit OPD for the product  then it is not fit for purpose.


    There is also the point that the manufacturer's instructions often state what they believe are the regulations in the UK rather than actually required for the product.

    The mention of 3A fuses and isolators which are not required for the same products in Europe being an example.

    The mention of an RCBO in your previous post is also obviously not definitive - unless you think an RCCB would be unsuitable.
Reply
  • Well, I disagree because I do not think you are correct.

    If there is no difference between the internal wiring of ovens and cookers then demanding lower OPD ratings for ovens is not valid.


    Nothing to do with polo wrappers, the ovens are sold in the UK therefore the manufacturer knows about 32A circuits for cookers.

    Why do you not suggest cookers should be on two 16A circuits as they would be in Europe?

    To design a cooking appliance that cannot be connected to a standard UK 32A circuit without extra protection is negligent.


    If we are talking about ring circuits then they know it will have a 13A plug; to demand a 16A OPD is also negligent.

    If we are talking about cooker circuits then they know it might be 32A which is apparent by the terminal links and instructions for cookers.


    You seem to be confusing the fixed wiring and appliance wiring and clutching at straws - I thought the problem was affording 16A protection on 32A circuits.

    If a cooker is alright on a 32A circuit then so is an oven. If you think a larger flex on the oven is required (it likely isn't) then that is a lot easier than down-fusing a cooker circuit - especially for two ovens.


    The OPD is for protecting the fixed wiring, not the appliance. If a manufacturer demands a lower rated OPD than the normal circuit OPD for the product  then it is not fit for purpose.


    There is also the point that the manufacturer's instructions often state what they believe are the regulations in the UK rather than actually required for the product.

    The mention of 3A fuses and isolators which are not required for the same products in Europe being an example.

    The mention of an RCBO in your previous post is also obviously not definitive - unless you think an RCCB would be unsuitable.
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