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Induction Hob again

Former Community Member
Former Community Member
I hope that you don’t find me impudent but I am having difficulty finding an electrician to explain why they will not install the induction hob and double oven that we are looking to fit in our new kitchen.
We have chosen a hob 7.4 kW and oven 6.3 kW. The cooker radial circuit has 6mm2 cable with 40A MCB. The run is some 12 m. The house was built (converted) in 2002 and inspected last year (DPN18C). We cannot run an extra cable because the CU is separated from the kitchen without a horizontal floor or roof space and presumably runs the existing cable through the stud walls.
The kitchen fitting company electrician has visited but won’t carry out the work unless we sign an indemnity as it would invalidate our insurance and the appliance guarantee. He suggested instead two plug-in ovens which we could add to the ring main. I have contacted four other local electricians but they all use 13.7 kW means 59.7 A which means 10 mm cable and ignore my request to consider diversity.
Should I give up and accept the two oven solution or perhaps a gas oven?
Do you know of a way of finding someone who understands diversity?
Am I simply wrong?

Parents
  • AJJewsbury:
    What size circuit would you instal for a single load of 6.3 KW or 27 Amps

    In this case though it won't be a single 6.3kW load - a single domestic oven doesn't take anything like that - most likely a double oven, perhaps including a grill in one of them - so more like 3off 2kW loads or at worst 2off 3kW loads - so I'd say there's a good case for diversity even within the one "oven".


       - Andy.


    I was presuming a single large oven of 6.3 Kw loading. If in fact this is  two ovens or two ovens and a grill with a total 6.3Kw loading, then I agree with your remarks.

    Two ovens and a grill, and several cooking rings is indeed comparable to a standard domestic cooker, even if the components are in seperate cases.

    32 amps might be reasonable in such a case, such circuits have a good record in practice. 40 amps might be better if heavy use is expected, and 50 amps is almost certainly OTT.


Reply
  • AJJewsbury:
    What size circuit would you instal for a single load of 6.3 KW or 27 Amps

    In this case though it won't be a single 6.3kW load - a single domestic oven doesn't take anything like that - most likely a double oven, perhaps including a grill in one of them - so more like 3off 2kW loads or at worst 2off 3kW loads - so I'd say there's a good case for diversity even within the one "oven".


       - Andy.


    I was presuming a single large oven of 6.3 Kw loading. If in fact this is  two ovens or two ovens and a grill with a total 6.3Kw loading, then I agree with your remarks.

    Two ovens and a grill, and several cooking rings is indeed comparable to a standard domestic cooker, even if the components are in seperate cases.

    32 amps might be reasonable in such a case, such circuits have a good record in practice. 40 amps might be better if heavy use is expected, and 50 amps is almost certainly OTT.


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