30A induction hob and 30A oven

[pushrod]

@ telectrix how did you get 7.8v, how did you find current?

From the title! where did you you get 3000W from ?

 

[telectrix]

so what's the load????? if you apply diversity, you could probably use 6mm single circuit for both. that would cut the cost.

 

[sparkysean]

ok sorry guys it says it's a 3000w but needs a 30A supply i'm not sure why ive not done too many of these induction hobs

 

[knasher]

max VD is 5% (11.5v) according to 17th edition Regs

 

[Deleted member 26818]

Could probably use 4mm² a a single circuit for both appliances.

 

[sparkysean]

Right i'm going to feel a right knob now but if you don't ask you don't learn and all that what's diversity? how do I use it, and where can I find all this info from guys, except the regs of course websites and such, yep I feel like a knob already lol

 

[telectrix]

applying diversity, a 6mm single circuit would fly it on a 40AMCB.

 

[pushrod]

Right i'm going to feel a right knob now but if you don't ask you don't learn and all that what's diversity? how do I use it, and where can I find all this info from guys, except the regs of course websites and such, yep I feel like a knob already lol

In the OSG

 

[Deleted member 26818]

Tables for diversity can be found in Appendix 1 of the On Site Guide.
For cooker appliances, it is 10A plus 30% of full load where the full load is above 10A.
As you appliances would have a combined full load of abot 27A, that would be 10A + 30% of 27A (8.1A) a total of 18.1A.
4mm² has a current carrying capacity of between 17.5A to 37A, depending on Reference Method.
From what you have said, the capacity is going to be at or near the maximum.

 

[sparkysean]

Thanks guys. I love this site so many informative people. Just to explain i've recently come back to install from a maintenance job where 17th edition and health and safety was seen as a way of getting out of work (they actually said this), please be patient whilst I'm getting used to the laws and standards again, many thanks.