cooker and induction hob urgent help URGENT ASAP

[mars6394]

hi all, not sure on the kw of the cooker can only presume 5 maybe 6kw on full load,the client has now rang and said about another electrician saying put a plug on the oven and plug it in which i am not doing as it is not an induction cooker,think the only way around this is for her to buy an induction cooker plug it into the socket ring and run the hob of the 6mm circuit but just wondered if a 6mm cable on a 32 amp breaker would handle 9.2kw as i dnt want to upgrade breaker to a 40 amp

 

[pushrod]

hi all, not sure on the kw of the cooker can only presume 5 maybe 6kw on full load,the client has now rang and said about another electrician saying put a plug on the oven and plug it in which i am not doing as it is not an induction cooker,think the only way around this is for her to buy an induction cooker plug it into the socket ring and run the hob of the 6mm circuit but just wondered if a 6mm cable on a 32 amp breaker would handle 9.2kw as i dnt want to upgrade breaker to a 40 amp

see post 14 above !

 

[mars6394]

does that regulation just apply to a cooker as they are both seperate appliances

 

[pushrod]

Not a regulation as such just advice from the IEE/ IET, who write the regs. Doesn't matter that the hob and oven are separate appliances - they are on the same radial. It is perfectly ok for the two appliances to be on the same circuit. (as long as within 2metres of isolator, as already mentioned) A quick word with the customer will make clear the intended use for them, with normal domestic use it is very unlikely to be a problem.

 

[mars6394]

jst getting reactions from different people i do agree with the pulse ratings from the cooker,as i say i would have ran a seperate circuit but she doesnt want to pay so its her own fault i have explained the risk to her,just c how it goes over the nxt 2 weeks but i have walked away from the job as such and i am not issuing a cert for the install as at the end of the day its my arse thats on the fireing line, i just think its a slight grey are within the regs with cookers

 

[pushrod]

If you you are acting on the advice of the IEE and you have pointed out that with very heavy usage there could be a chance that the mcb will trip i can't see how you could possibly be considered negligent. Are you part of a competent person scheme - if so you could phone them up and put your mind at rest.

 

[mechelec]

Does the cooker need a 32A supply as some are only on a 13A plugtop. If it does then you may be pushing it with the hob as well. Dont forget diversity as the OSG states the first 10% of the rated current plus 30% of the remainder of the rated current Plus 5A if a socket is incorporated in the Cooker CU

Using the above advice i quoted earlier in this post does it not work out that allowing for diversity gives only 12.065A

ie 7500/230=32.61A 10% of 32.61A = 3.26A and 30% of the remainder = 8.805A threfore total = 12.065A for the hob.

Please correct me if i am wrong as it has been known

 

[Oli]

The big question is why didnt she use one of the experts she knows

Exactly.....

thanks everyone for replies ive told her she is pushing her luck with both hob/cooker but she doesnt want to pay price for another circuit i told her on her head be it and have just walked away and left her too it,i cant force her to do something she doesnt want to do on her head be it,she said she will never use all the hob at once i said i couldnt care less regulations are there for a reason she wants to break them let her

hi all, not sure on the kw of the cooker can only presume 5 maybe 6kw on full load,the client has now rang and said about another electrician saying put a plug on the oven and plug it in which i am not doing as it is not an induction cooker,think the only way around this is for her to buy an induction cooker plug it into the socket ring and run the hob of the 6mm circuit but just wondered if a 6mm cable on a 32 amp breaker would handle 9.2kw as i dnt want to upgrade breaker to a 40 amp

You have to ask why she is still ringing you after deciding you are wrong and you telling her to get someone else to do it, ask her why she is ringing another spark who is telling her ways around things, if the other person she has spoke to is so sure why isnt he doing it, why is she ringing you!!!

Sounds like a job to steer well clear of mate tbh.

 

[pushrod]

Using the above advice i quoted earlier in this post does it not work out that allowing for diversity gives only 12.065A

ie 7500/230=32.61A 10% of 32.61A = 3.26A and 30% of the remainder = 8.805A threfore total = 12.065A for the hob.

Please correct me if i am wrong as it has been known

Diversity on a cooker is first 10A plus 30% of the rest, plus 5amp if there is a socket outlet on the isolator.

So on 32.61 A it is 10A +(0.3 x 22.61 =) 6.78A = 16.78A
with another 5A to add if there is a socket outlet.

 

[sparks1234]

How do you get to 6mm only rated at 32 amps

 

[mars6394]

exactly my point oli let the other guy sort it the hob and coocker is connected to the 6mm i have advised her she is at the maximum of the cable n the mcb will trip and gave her a quote for new circuit 35 meter run awkward as hell 10mm cooker point £180 she said i am crazy lol,i have gave her my advice she dont want to take my advice well dam her, i just dont want to be pulled into this if anything does go wrong in the future,i cannot force her to do anything she dont want to do and with the other electricians i have told her let them do it

 

[pennywise]

I would just love to know what the Kw rating of the cooker is? think it may clear things up pretty quickly

 

[flukey]

I would just love to know what the Kw rating of the cooker is? think it may clear things up pretty quickly

my thoughts entirely, ive already asked twice

 

[flukey]

exactly my point oli let the other guy sort it the hob and coocker is connected to the 6mm i have advised her she is at the maximum of the cable n the mcb will trip and gave her a quote for new circuit 35 meter run awkward as hell 10mm cooker point £180 she said i am crazy lol,i have gave her my advice she dont want to take my advice well dam her, i just dont want to be pulled into this if anything does go wrong in the future,i cannot force her to do anything she dont want to do and with the other electricians i have told her let them do it

sounds like youve already connected both items so what has the other spark got to sort if you have connected them you should issue a cert, if you wont issue a cert you should disconnect them if your not happy
first thing i would do is find the rating for the cooker so you can do a proper cable calc before connecting any appliances

 

[mars6394]

the rating of the cooker is 6.5kw, both items are connected to the same circuit but i will not be issuing any certs