Self Build Advice Please - consumer units, sockets & switches...

[davesparks]

For Normal domestic 100Amp Fuses to BS 1361, these are the graph given figures of TIME V. CURRENT, to Rupture the fuse:-
0.1 second @ 1800Amps
1 second @ 950Amps
5 seconds @ 630Amps
3 MINUTES @ 360Amps
10 MINUTES @ 250Amps - (Fuse does get Hot)
1 HOUR @ 170Amps

You should not plan an installation which relies on this though, the fuse will weaken with time as it is subjected to such overloads and the terminals etc of the cutout won't necessarily be rated for the duty.

 

[hasel5]

Use the gas supply simples

 

[janner43]

Use the gas supply simples

Sigh...


Urban.co.uk News and Views Blog | Flame goes out for gas in the UK


The UN's Paris climate deal 'signals end to gas cookers' say experts | Daily Mail Online


Huge change facing property world as gas looks set to be phased out - Property Industry Eye


and this from 2014...
Forget your gas cooker ? we?re headed for 'zero carbon? Britain - Telegraph

 

[7029 dave]

On your opening post, you say the Electrician will be advising you, does that mean he is not working on the installation.?

 

[janner43]

You should not plan an installation which relies on this though, the fuse will weaken with time as it is subjected to such overloads and the terminals etc of the cutout won't necessarily be rated for the duty.

I agree.

I cannot see anything more than 26kw (113amp) ever being used at once - and then only on rare occasions and only for 90 seconds maximum. But I must admit that I would have been happier if the water heaters were on the smaller side, but have decided to go with these (already bought)

 

[janner43]

On your opening post, you say the Electrician will be advising you, does that mean he is not working on the installation.?

He is doing all the electrical work. Perhaps I should have been more semantically correct and said "I know he will give us good advice and perform an excellent & professional service for us"

Good grief, I am beginning to wish I hadn't asked!!

 

[davesparks]

Sigh...


Urban.co.uk News and Views Blog | Flame goes out for gas in the UK


The UN's Paris climate deal 'signals end to gas cookers' say experts | Daily Mail Online


Huge change facing property world as gas looks set to be phased out - Property Industry Eye


and this from 2014...
Forget your gas cooker ? we?re headed for 'zero carbon? Britain - Telegraph

Yeah right, our electricity networks are a patchwork of ancient cables and distribution waiting to fall apart. A mass move to electric heating and cooking will result in one heck of a lot of power cuts!

 

[jackhammerJIM]

Good grief, I am beginning to wish I hadn't asked!!

Your on here for advice which is being given . It is just advice "do whatever you want to "

 

[janner43]

You should not plan an installation which relies on this though, the fuse will weaken with time as it is subjected to such overloads and the terminals etc of the cutout won't necessarily be rated for the duty.

I agree.

I cannot see anything more than 26kw (113amp) ever being used at once - and then only on rare occasions and only for 90 seconds maximum. But I must admit that I would have been happier if the water heaters were on the smaller side, but have decided to go with these (already bought)

You have made me think though Dave. I will give some consideration to a 3kw 5litre hot water solution for the kitchen. It is the kitchen tap which will be used most and possibly at the same time as the shower (9.5kw) or a bathroom tap (12kw).

 

[janner43]

Yeah right, our electricity networks are a patchwork of ancient cables and distribution waiting to fall apart. A mass move to electric heating and cooking will result in one heck of a lot of power cuts!

It isn't what we think about it that matters though Dave, is it. Apparently that is a serious proposal that is being considered - I know it seems hard to believe, but I only know what I have read...

 

[7029 dave]

IMO these questions should be discussed with your Electrician on site, are you doubting his integrity, If I were him would not be best pleased in the slightest, sorry but if you are going to have an hissy fit over some Q's then IMO there is no other spark is there.!! It's an selfie.

 

[davesparks]

It isn't what we think about it that matters though Dave, is it. Apparently that is a serious proposal that is being considered - I know it seems hard to believe, but I only know what I have read...

And I know what I've read, in one of the DNO's technical papers detailing how chunks of the distribution system are still working on DC distribution from around 100 years ago.

 

[jackhammerJIM]

It isn't what we think about it that matters though Dave, is it. Apparently that is a serious proposal that is being considered - I know it seems hard to believe, but I only know what I have read...

The muppets that run this country are not going to scrap gas . For one the energy companies themselves would not allow this as a loss of revenue (they are powerful) .

We are on the limit for power as is . Not enough power stations and fear of brown outs in the near future if they don't get arses in gear !

They look like genuine articles but this is the first i have heard of the idea . Not going to happen , If gas is available you would be foolish not to utilise it .

 

[Octopus]

the property should be built with gas, electricity and a wood burner - then you've got the bases covered!

 

[Lagentium]

I'd go ground source heat pump and forget those instant water heaters rated at 12kw, they are a daft option IMHO, but that is just my opinion.

 

[janner43]

OK, thanks to everyone for your advice.

The thread can be closed now as far as I'm concerned.

 

[gaz101]

No diversity allowed on water heaters
what's the cost of a 50kva+ supply?

 

[Midwest]

The muppets that run this country are not going to scrap gas . For one the energy companies themselves would not allow this as a loss of revenue (they are powerful) .

We are on the limit for power as is . Not enough power stations and fear of brown outs in the near future if they don't get arses in gear !

They look like genuine articles but this is the first i have heard of the idea . Not going to happen , If gas is available you would be foolish not to utilise it .

There was a debate here, on this issue a short while ago. Can't be bothered to locate it, but suffice to say the UN Climate Change Conference 2015, agreed on a reduction of 2' of global warming, and less reliance on fossil fuels, by 2030. Whether it will happen or not, as the agreement doesn't appear to be biding. In the UK, apart from fuel for vehicles, a lot of our carbon emissions come from, gas heating and gas cooking. Whilst some effort is being made on carbon emissions from vehicles, little is being done with our gas consumption. Hence the headlines about the demise of domestic gas boilers and hobs.

 

[joehat]

You should not plan an installation which relies on this though, the fuse will weaken with time as it is subjected to such overloads and the terminals etc of the cutout won't necessarily be rated for the duty.

Agree, gonna have a look in abit as I'm nosy ,but do you remember where you found this info Reg Ect.

 

[joehat]

You should not plan an installation which relies on this though, the fuse will weaken with time as it is subjected to such overloads and the terminals etc of the cutout won't necessarily be rated for the duty.

Specially with the cheap and cheerful options.