7.6kW Induction Hob - need to select cable and fuse size

[Soulsurfer]

Because the existing useable feed is a 6mm from a 32A RCBO so would be easiest to use the cable and possibly feed hob & Oven, would've thought it would be frowned upon to use anything smaller through a cooker switch which is 45A and therefore large terminals. Suppose could run out a 2.5 T&E from the cooker switch but.

 

[Leesparkykent]

At least with a 6mm it's more future proof.

 

[davesparks]

Because the existing useable feed is a 6mm from a 32A RCBO so would be easiest to use the cable and possibly feed hob & Oven, would've thought it would be frowned upon to use anything smaller through a cooker switch which is 45A and therefore large terminals. Suppose could run out a 2.5 T&E from the cooker switch but.

Wtf? You are talking about running a new circuit from the CU in 6mm and fitting a 45A switch for a 4KW load?
Do you run all 16A radials in 6mm?

 

[davesparks]

At least with a 6mm it's more future proof.

Future proof how?

 

[Leesparkykent]

Future proof how?

Incase a bigger KW induction hob or cooker is installed.......

 

[Soulsurfer]

No of course not 6mm on 16A radials !
I think my point is being lost, right now there is a 6mm fed in, it was jointed in a jb and split to feed old hob & oven, I would like to feed new hob & oven with it and just locate the cooker switch to a position within regs. I had no idea if being induction hob would need full load rated to be calc and no diversity and as oven is seperate and singular there would not be diversity on it due to my understanding it's one element and so can't be diverse. It's themostatically on or off. So I was wondering if I need a new seperate radial run in for oven, and as Lee said I would rather go to 4-6mm if needed to cover any future larger load being fitted e.g. Customer decides they fancy a double oven later to cope with family and for instance 11kW.

 

[Leesparkykent]

No of course not 6mm on 16A radials !
I think my point is being lost, right now there is a 6mm fed in, it was jointed in a jb and split to feed old hob & oven, I would like to feed new hob & oven with it and just locate the cooker switch to a position within regs. I had no idea if being induction hob would need full load rated to be calc and no diversity and as oven is seperate and singular there would not be diversity on it due to my understanding it's one element and so can't be diverse. It's themostatically on or off. So I was wondering if I need a new seperate radial run in for oven, and as Lee said I would rather go to 4-6mm if needed to cover any future larger load being fitted e.g. Customer decides they fancy a double oven later to cope with family and for instance 11kW.

I think Richard has covered it well in #29. Locate the cooker switch in a convenient/correct location and fit a dual connection plate for hob and cooker.

 

[longboat]

Wtf? You are talking about running a new circuit from the CU in 6mm and fitting a 45A switch for a 4KW load?
Do you run all 16A radials in 6mm?[/QUOTE
If it was a new supply for an oven in lets say a kitchen extension to a property, then yes I would run it in 6mm with a 32A breaker on a 45A DP switch and socket. Best start using the push bike to get to work, will save the customer a few quid. FFS.