Opinions on the load of this cooker circuit???

[Geoffsd]

.
Didn't get any calls Christmas day. Anyone else?

With respect
No sorry that’s not my intention, the point I am trying to make is that the book is only a guide and certain things should be taken in to consideration when assessing a situation.

I certainly agree about all the 'guides' but what else is there to consider?

Diversity is a judgment not an exact science and I feel that just doing the maths is not enough.

That judgement is the result of decades of satisfactory experience.

Where I live we still have abnormal low voltage on certain parts of the island, this must be considered, its not in the book.

That will reduce the current.

Right off you lot go, pick the snot out of that, I have put my tin hat on.

Ok. oops, too late.

The vast majority of cookers are on 6mm amd 32A.

 

[Knobhead]

Diversity and cookers.

When they’re all turned off, they won't be on.
When they’re all turned on occasionally all could be on or they could all be off.
When they’re all turned on some may be off and some may be on.
When some are turned on, of the ones turned on some could be off. The ones turned off won’t be on.

Does that clear it up?

 

[Dcf]

I had a big Miele 5 zone ceramic hob to connect rated at 8.5 kw one time, circuit on its own mind.
could not get it above 20A with all 5 zones set to stun no matter how much I tried.
so diversity does work sometime...

 

[telectrix]

works all the time or else there'd be miles of burnt out 6mm kicking about.

 

[Steve_P]

Get a clamp meter and a few mates. Clamp the errrrr clamp meter ? ? ? On the count of 3, turn all the rings on full and the oven and the grill. Bet it doesn't pull anywhere near 32A. Then the Tony theory will kick in and it will all make complete sense. After that, the earth will vanish into a wormhole created by Steven Hawking and the starship enterprise will blow up the go compare singer.

 

[SAILOR48]

That will reduce the current.


Well if you reduce the voltage the current reduces also, that means I have misunderstood the first thing that I was taught, ohms law.
So I apologies for coming on here and claiming to be an electrician I will now retire and take up knitting. Have a nice life bye bye

 

[MDJ]

I will now retire and take up knitting.

You could Knit a throw with a fancy pattern and put it on your rocking chair :biggrin5:

 

[IanHug]

works all the time or else there'd be miles of burnt out 6mm kicking about.

Is it the case that the safety margins so high that it's all a bit of a waste of time?

 

[Geoffsd]

That will reduce the current.
Well if you reduce the voltage the current reduces also, that means I have misunderstood the first thing that I was taught, ohms law.

Apparently. V=IxR What happens to the resistance?

 

[Geoffsd]

Is it the case that the safety margins so high that it's all a bit of a waste of time?

They are higher than you probably think but not in this case.

See above.

 

[SAILOR48]

You could Knit a throw with a fancy pattern and put it on your rocking chair :biggrin5:

Yes I found a lovely pattern on ebay but, whats happened to OHMS law has it changed?
I trust you please tell me please

 

[electric will]

Yes I found a lovely pattern on ebay but, whats happened to OHMS law has it changed?
I trust you please tell me please

Ohms is fixed, if you lower the voltage the wattage will reduce

 

[Silly Sausage]

kdhla;naiclwe gck,keuse xcyuhgukwtc

I'm an alcoholic, that's why I talk gibberish.
What's your excuse?

 

[Engineer54]

With respect
No sorry that’s not my intention, the point I am trying to make is that the book is only a guide and certain things should be taken in to consideration when assessing a situation.
Diversity is a judgment not an exact science and I feel that just doing the maths is not enough.
Where I live we still have abnormal low voltage on certain parts of the island, this must be considered, its not in the book.
Right off you lot go, pick the snot out of that, I have put my tin hat on.

I agree to a certain extent, But the cooker diversity formula laid out in BS7671/OSG is about the only one in the book that actually works. And it's worked rather well for over 60+ years on cookers up to 15KW... And why the vast majority of household cooker circuits in the UK as a whole, are based around 7/044/6mm cable (usually T&E) protected by a 30/32A Breaker/fuse.

 

[MDJ]

Yes I found a lovely pattern on ebay but, whats happened to OHMS law has it changed?
I trust you please tell me please

Google is a wonderful tool Sailor
Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference across the two points. Introducing the constant of proportionality, the resistance,[SUP][1][/SUP] one arrives at the usual mathematical equation that describes this relationship:[SUP][2][/SUP]

 

[Stroppy]

That may be so, but Ken Ohm was a Electrical Trainee and talked a load of crap, and should have stuck to his chinese cooking instead of branching out into electrics.

 

[electric will]

That may be so, but Ken Ohm was a Electrical Trainee and talked a load of crap, and should have stuck to his chinese cooking instead of branching out into electrics.

Who are you referring to as ken ohm? The Chinese chef or one of us?

 

[Heisenberg]

Yes I found a lovely pattern on ebay but, whats happened to OHMS law has it changed?
I trust you please tell me please

No it has not changed but you are just applying it incorrectly.

The resistance of the element in the cooker is fixed and cannot change, therefore if the resistance remains the same yet the voltage is lowered, then the current will be reduced too. QED