Hello all. I am in the process of having the prep work done for a new kitchen to be fitted next month. This is being carried out alongside an extension and a garage conversion under a building notice, and due to relocation of things like the cooker and sink everything is being ripped out and replaced. I am using an electrician and a plumber to carry out the appropriate work, I'm fitting the units, and then fitters will do the worktops. The spark has already done work in the extension and I am happy that he knows what he is doing, but I would like a second opinion on something he mentioned today.
Due to circumstances preventing the use of a gas hob, I am having an electric induction range cooker fitted. The complete cooker (hob + ovens) is rated at 17.1kw, which by my understanding means it could draw up to 74A assuming a 230V supply (or 70A given the 245V actually present here). The electrician is aware of the cooker I have chosen and has contacted the technical helpline to confirm that a 45A supply is sufficient. It is indicated as such in the installation instructions. Therefore he will be installing a cooker connection point with a separate 45A isolator switch, and the cooker supplier will make the final connections on delivery.
He mentioned that this was acceptable due to diversity applied to cooking equipment, and from his explanation of that it makes perfect sense to me. I thought nothing more of this until I began searching about induction hobs on this forum where the consensus among people who look to be experienced sparks is that you cannot apply diversity to them because of the way they work. If this is true then installing to a 45A supply strikes me as a potential problem.
I have no reason to question this guy's work; as I said I have been very impressed with what he has done for me so far and the level of knowledge he has expressed in explaining everything to me in great detail, so I don't want to question him on this unecessarily. When I asked he provided a logical answer so my question to you guys is should I bring this up again or is it all ok?
Due to circumstances preventing the use of a gas hob, I am having an electric induction range cooker fitted. The complete cooker (hob + ovens) is rated at 17.1kw, which by my understanding means it could draw up to 74A assuming a 230V supply (or 70A given the 245V actually present here). The electrician is aware of the cooker I have chosen and has contacted the technical helpline to confirm that a 45A supply is sufficient. It is indicated as such in the installation instructions. Therefore he will be installing a cooker connection point with a separate 45A isolator switch, and the cooker supplier will make the final connections on delivery.
He mentioned that this was acceptable due to diversity applied to cooking equipment, and from his explanation of that it makes perfect sense to me. I thought nothing more of this until I began searching about induction hobs on this forum where the consensus among people who look to be experienced sparks is that you cannot apply diversity to them because of the way they work. If this is true then installing to a 45A supply strikes me as a potential problem.
I have no reason to question this guy's work; as I said I have been very impressed with what he has done for me so far and the level of knowledge he has expressed in explaining everything to me in great detail, so I don't want to question him on this unecessarily. When I asked he provided a logical answer so my question to you guys is should I bring this up again or is it all ok?