63 Amp Isolator

[Redvanman]

I'm running a 63A supply for a cooker and need to have a local isolator.
Apart from having a 63A main switch in a small enclosure, is there any thing else I could use which is discreet to put in the back of a cupboard.

Thanks

 

[Engineer54]

Because no one would have it. People continually trying to prove me wrong. Caught hook, line and sinker you might say but at the end of the day my first response was correct and if I'm honest, I rather enjoyed watching people trying and failing to find regulations to show me up

Nowt wrong with a bit of controversy!

That's half the problem these day's, most here seem to think that BS7671 and it's OSG's etc will always come up with a definitive answer to any query you can throw-up!! lol!!

 

[D Skelton]

Hmmm, controversy or trolling? You say tomato I say tomaato

Now now, it can't be considered trolling if I'm quoting regs can it. I'm not being difficult for the sake of being difficult am I? I'm merely stating a perfectly correct point. Whether or not you agree with the regs (or at least this particular section) is up to you.

That's half the problem these day's, most here seem to think that BS7671 and it's OSG's etc will always come up with a definitive answer to any query you can throw-up!! lol!!

Most of the time the BGB will! Sometimes it leaves a little to the imagination too though I agree! Still, regs are regs, love 'em or hate 'em, they're all we are obliged to work to (discounting ESQCRs EAWRs ect...) as best practice guides are merely one man's opinion to another.

 

[Amp David]

i7,000 / 240 = 70.83A - 10 x 0.3 +10 = 28.25A

Come on now, we all know its now 230 volts!

 

[Redvanman]

Morning I mention induction because someone seemed surprised by the size so was explaining why there so big.
I am installing 10mm so that she can have what ever cooker she wants (takes ages for her to make her mind up) therefore going through a 63A isolator and the mcb be will be any thing between 32A to 63A. Covering all bases.
I agree that it will never pull total load so diversity isn't a problem, to get to total load you would have to have everything on full whack and god knows what you'd be cooking for that.
I've enjoyed this thread very interesting but know one every answer the original question.

 

[Geoffsd]

Come on now, we all know its now 230 volts!

It will have been quoted at 240 by the manufacturer.

 

[Richard Burns]

The original question was is there a small 63A isolator?
The answer is no, because they are not required and the physical size would be large to accommodate the contact size.
Perhaps there is an alternative.. see the previous 105 posts.

 

[Engineer54]

Most of the time the BGB will!

Far from it, ....maybe sometimes, ...if your lucky!! BS7671 is not, and never has been, a step by step guide for beginners!!

 

[Engineer54]

Morning I mention induction because someone seemed surprised by the size so was explaining why there so big.
I am installing 10mm so that she can have what ever cooker she wants (takes ages for her to make her mind up) therefore going through a 63A isolator and the mcb be will be any thing between 32A to 63A. Covering all bases.
I agree that it will never pull total load so diversity isn't a problem, to get to total load you would have to have everything on full whack and god knows what you'd be cooking for that.
I've enjoyed this thread very interesting but know one every answer the original question.

You're having a laugh now, .....Aren't you??

 

[Redvanman]

You're having a laugh now, .....Aren't you??

CU the other side of the wall cable length minimal no thermal insulation run inside plastic conduit into CU 10mm will cover 63A

 

[Amp David]

Does diversity not apply anymore?

 

[Amp David]

It will have been quoted at 240 by the manufacturer.

Maybe, but have always been taught that when designing any circuit, we use the nominal voltage of 230

 

[Geoffsd]

Yes but we're not designing a circuit.

We're working out how many amps is 17kW @240V which is what the manufacturer will have stated.

At 230V it will be less, not more.

 

[Engineer54]

CU the other side of the wall cable length minimal no thermal insulation run inside plastic conduit into CU 10mm will cover 63A

It's NEVER going to see 63A!!!! You're talking about a cooker load, that is just 2 KW over and above, that can safely be supplied by a 6mm cable on a 32A MCB/RCBO!! ....So you have just got to be having a laugh with us, if to cater for that extra 2KW you're going to ditch the 45A CCU for a 63A isolator, that is going to be one hell of an ugly so and so, for a domestic kitchen.
Just wait until your customer see's the size of it!! lol!!

 

[D Skelton]

Just wait until your customer see's the size of it!! lol!!

I'm sure the customer is going to be more worried about those brightly coloured E-stops and fireman's switches that will HAVE to be installed!

 

[Redvanman]

It's NEVER going to see 63A!!!! You're talking about a cooker load, that is just 2 KW over and above, that can safely be supplied by a 6mm cable on a 32A MCB/RCBO!! ....So you have just got to be having a laugh with us, if to cater for that extra 2KW you're going to ditch the 45A CCU for a 63A isolator, that is going to be one hell of an ugly so and so, for a domestic kitchen.
Just wait until your customer see's the size of it!! lol!!

Thats why I sad about using a main switch as the local isolator in the cupboard the enclosure is about 125mm high by 75mm. As she's never going to see it I don't think she will be bothered.
as for the 10mm I am covering my arse just in case she turns up with the monster 17kw jobby.

As for the emergency stop button I have found a nice polished chrome one so I think that will work quite well. :smilielol5:

 

[Geoffsd]

Using diversity on a 63A circuit she can have a 44kW one.

 

[D Skelton]

So long humble baked potato, today we have NUKED potato!

 

[Silly Sausage]

That's right they induce the heat into the cooking utensil/pan, not the surrounding glass or element. These hobs are so fast, that they can cook a fried egg to perfection before a conventional halogen hob has even started to turn the egg white, White!! They do hit max quite often, but are still subject to thermostatic control. Just everything happens that much faster!! lol!!

I'd never swop back to a gas hob now. Never had an electric hob, they were and still are totally uncontrollable, and remain hot enough to burn you for a good hour or so, after you have finished cooking. ...total waste of energy!!

Cheers cock, I thought so.
I've seen a picture of half a frying pan on an indy hob with an egg cracked on it, the bit on the pan is cooked and the bit on the hob itself is still raw. Excellent! I'll be definitely be getting one on the next kitchen upgrade.

 

[Engineer54]

Thats why I sad about using a main switch as the local isolator in the cupboard the enclosure is about 125mm high by 75mm. As she's never going to see it I don't think she will be bothered.
as for the 10mm I am covering my arse just in case she turns up with the monster 17kw jobby.

As for the emergency stop button I have found a nice polished chrome one so I think that will work quite well. :smilielol5:

God help your customer is all i can say!! You haven't got a bloody clue what you're doing!!

 

[Engineer54]

Cheers cock, I thought so.
I've seen a picture of half a frying pan on an indy hob with an egg cracked on it, the bit on the pan is cooked and the bit on the hob itself is still raw. Excellent! I'll be definitely be getting one on the next kitchen upgrade.

The other great thing about these hob's, is that the glass surfaces don't get hot, so no burnt on spills or splashes, just a quick wipe and it's all clean again...lol!!

 

[Silly Sausage]

I saw one at some super energy saving house once, the geezer has open days to try and promote his business, which had these pop up sensors that monitor the temp of the pan. So, for example, a pan of milk would never boil over.
I'm amazed they seem to be quite rare, they were invented centuries ago! (slight exaggeration )

 

[Redvanman]

God help your customer is all i can say!! You haven't got a bloody clue what you're doing!!

Oh great sage please enlighten me where I've been going wrong

 

[MDJ]

10mm2 cable, 40 amp supply simples, 45 amp double pole isolator and Job done, Regs can be quoted all day regarding isolation and methods, all a load of rollocks, I have been doing this for donkey's years and never ever had any come backs, a 17kw range is the norm these days and you will find the manufacturer will recommend what I have suggested

 

[Redvanman]

Agree but seems that engineer is going down the diversity line of 32Amcb cos diversity says so

 

[MDJ]

The engineer knows his stuff M8, however without reading the whole 11 pages again I know what I have suggested is perfectly fine and a 63 amp isolator pointless in this case.