New CU and meter tails etc

[rajshar]

Rajshar,
I don't think you understand the knowledge you are portraying. What size is your cut-out fuse? What's the maximum ampage 16mm and 25mm cables can safely carry? If the DNO have attached 16mm to your cut-out why do you want to replace them with 25mm?
Why can't the quoted electricians fit an isolator, that's the simplest job of the lot. A qualified leccy would 100% definitely not allow a customer to purchase the tails and isolator. Too much knowledge is a dangerous thing.

I think you have misunderstood me. It's true I don't have the knowledge at par with you guys nor I am trying to be an electrician, I am just trying to understand the general bits. If I had no knowledge and I didn't ask here then I would have gone ahead with one of those two electricians, who would have done a shoddy job.

The isolator is being fitted by British gas, the electricity supplier. My electrician will work from isolator. Some of you guys said that they will install 25mm tails and 16mm earth but that will be from isolator. So I asked the question that can I ask the British Gas electrician to fit 25mm tails up to isolator and if required I can provide him the tails. This is the reason I ask the question as I don't know that he will do this or not.
If fuse is 100amp in the cutout then he should fit the rated cables anyway. If fuse isn't 100amp then we will have to ask the DNO to upgrade the fuse and they will only upgrade the fuse if the rated cables are already there. My understanding is that DNO won't touch the tails as it isn't their responsibility.

 

[Babs]

I think you have misunderstood me. It's true I don't have the knowledge at par with you guys nor I am trying to be an electrician, I am just trying to understand the general bits. If I had no knowledge and I didn't ask here then I would have gone ahead with one of those two electricians, who would have done a shoddy job.

The isolator is being fitted by British gas, the electricity supplier. My electrician will work from isolator. Some of you guys said that they will install 25mm tails and 16mm earth but that will be from isolator. So I asked the question that can I ask the British Gas electrician to fit 25mm tails up to isolator and if required I can provide him the tails. This is the reason I ask the question as I don't know that he will do this or not.
If fuse is 100amp in the cutout then he should fit the rated cables anyway. If fuse isn't 100amp then we will have to ask the DNO to upgrade the fuse and they will only upgrade the fuse if the rated cables are already there. My understanding is that DNO won't touch the tails as it isn't their responsibility.

I think you have misunderstood me. It's true I don't have the knowledge at par with you guys nor I am trying to be an electrician, I am just trying to understand the general bits. If I had no knowledge and I didn't ask here then I would have gone ahead with one of those two electricians, who would have done a shoddy job.

The isolator is being fitted by British gas, the electricity supplier. My electrician will work from isolator. Some of you guys said that they will install 25mm tails and 16mm earth but that will be from isolator. So I asked the question that can I ask the British Gas electrician to fit 25mm tails up to isolator and if required I can provide him the tails. This is the reason I ask the question as I don't know that he will do this or not.
If fuse is 100amp in the cutout then he should fit the rated cables anyway. If fuse isn't 100amp then we will have to ask the DNO to upgrade the fuse and they will only upgrade the fuse if the rated cables are already there. My understanding is that DNO won't touch the tails as it isn't their responsibility.

Rajshar,
Your comments strengthen my belief that you are out of your depth with your questions to "experts" for want of a better word. You keep mentioning the 100 amp cut-out and asking the DNO to upgrade it to 100 amp. You obviously don't realise that almost every family dwelling will operate on a 60 amp fuse, 80 amps in extreme cases. To satisfy yourself, go around your house at any time and see what is switched on and approx how much ampage is being used. I'll bet you never get to more than 30.

 

[rajshar]

Rajshar,
Your comments strengthen my belief that you are out of your depth with your questions to "experts" for want of a better word. You keep mentioning the 100 amp cut-out and asking the DNO to upgrade it to 100 amp. You obviously don't realise that almost every family dwelling will operate on a 60 amp fuse, 80 amps in extreme cases. To satisfy yourself, go around your house at any time and see what is switched on and approx how much ampage is being used. I'll bet you never get to more than 30.

You can think of what you want to think. It may be that 60 or 80amp is enough at this time. There is something called future proof. How about tomorrow we want an EV point?
DNO has no problem to upgrade the fuse if rated cables are there. I as a customer don't want to pay again for 25mm tails if it can be installed now.
Now having knowledge or asking questions, I don't think there is anything wrong asking. You can ignore this thread if you think I am wrong.

 

[Babs]

You can think of what you want to think. It may be that 60 or 80amp is enough at this time. There is something called future proof. How about tomorrow we want an EV point?
DNO has no problem to upgrade the fuse if rated cables are there. I as a customer don't want to pay again for 25mm tails if it can be installed now.
Now having knowledge or asking questions, I don't think there is anything wrong asking. You can ignore this thread if you think I am wrong.

It's all to do with diversity. Presumably you understand what diversity is regarding electricity.

 

[rajshar]

I do understand diversity and I know we don't use all the appliances and other stuff at the same time. Just like so many others, we do have plans for Electric Vehicle.

I think this post is becoming unnecessary lengthy. The original question has been answered and now I know how to proceed with my next quote and what questions to ask.

Thanks to everyone who contributed positively and suggested what should be done.
Thanks

 

[Babs]

I do understand diversity and I know we don't use all the appliances and other stuff at the same time. Just like so many others, we do have plans for Electric Vehicle.

I think this post is becoming unnecessary lengthy. The original question has been answered and now I know how to proceed with my next quote and what questions to ask.

Thanks to everyone who contributed positively and suggested what should be done.
Thanks

No problem Rajshar. I enjoyed the discussion.

 

[DPG]

I do understand diversity and I know we don't use all the appliances and other stuff at the same time. Just like so many others, we do have plans for Electric Vehicle.

I think this post is becoming unnecessary lengthy. The original question has been answered and now I know how to proceed with my next quote and what questions to ask.

Thanks to everyone who contributed positively and suggested what should be done.
Thanks

We can drag out a thread on here, don't you worry ?

You do raise a good point though. Whereas in the past any house would be fine on a 60 Amp fuse, things are changing a little with the higher output EV chargers. Having said that, a lot of them have current monitoring and can throttle back if the household usage is peaking.

 

[brianmoooore]

Having said that, a lot of them have current monitoring and can throttle back if the household usage is peaking.

It'll have to go further than that, with whole area monitoring by some means. The existing infrastructure isn't remotely capable of providing even 60A to each household at the same time.
Maybe you'll be required to have a second battery in the house that charges intelligently when it can, in preparation for discharging itself quickly into the car battery.

 

[Gurnatronics]

You can think of what you want to think. It may be that 60 or 80amp is enough at this time. There is something called future proof. How about tomorrow we want an EV point?
DNO has no problem to upgrade the fuse if rated cables are there. I as a customer don't want to pay again for 25mm tails if it can be installed now.
Now having knowledge or asking questions, I don't think there is anything wrong asking. You can ignore this thread if you think I am wrong.

tinfoil hat on

Don’t worry the DNO will remotely drop your smart EV charger via information obtained by its smart meter to 10A during peak load anyway so no need to worry about Fuse or tails size