Sizing Cooker fuse / diversity...confused

[baldsparkies]

Indeed.


Even 4mm is fine on a 32, but lets not go there.

I went there Jason 6mm on a 40, Somebody prove me wrong ??

 

[Wotsit]

I went there Jason 6mm on a 40, Somebody prove me wrong ??

I was not questioning this, but how will putting a 32A protective device on a cct that has a 40A load meet co-ordination?

Am i missing someting?

 

[sparks1234]

So should we forget about the BRB and just do what we feel like? Because we know better? I know its not law but the book is there for a reason.

To me one reg is as important as another, esp if giving advice.

Pease read 433.1.1

Dont forget that most of us are experienced electricians and are capable of a bit of engineering judgement and common sense

 

[baldsparkies]

The first 10A of the rated current plus 30% of the remainder of the rated current in excess of 10A plus 5A if a socket-outlet is incorporated in the cooker control unit. (Well it helps things along bit diverse though)

 

[andyb]

I was not questioning this, but how will putting a 32A protective device on a cct that has a 40A load meet co-ordination?

Am i missing someting?

The electrician should use his experiance and judgement when assessing the maximum demand of a circuit.

The loading of a cooker as advised by the manufacturer is simply the sum of all elements in the cooker.
This includes the grill which is not on when the oven is on.

Unlike an electric shower(which is either fully on or off), the cooker is never fully on and I think it not unreasonable to assess the load as below that which the manufactuere states.

 

[baldsparkies]

The electrician should use his experiance and judgement when assessing the maximum demand of a circuit.

The loading of a cooker as advised by the manufacturer is simply the sum of all elements in the cooker.
This includes the grill which is not on when the oven is on.

Unlike an electric shower(which is either fully on or off), the cooker is never fully on and I think it not unreasonable to assess the load as below that which the manufactuere states.

All the above Andy along with diversity factors for cooking appliances as per my last post,cannot see where there is a problem really can't