oven and hobs again

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Durham
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hi, got a new 4.2kw oven and 5.8kw hob and an existing ccu on a 40a mcb in 6mm will this be able to feed both of above?

and if so how would you calculate the demand?
 
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Watts divided by volts = amps so looking at 18 and 25 amps.
6mm cable can be as low as 23.5A but more likely around 34A so you need to check the installation method.
Unlikely for a 6mm cable to be feed with 40A MCB and comply but it may if clipped direct.
Most likely you would not have a problem but to be sure more information would be required which is one of the reasons why Part P requires either you pay LABC £125 to check it or registered electrician under Part P.
 

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