What size is this supply?

[John-SJW]

A relative in West Cheshire sent me this pic. He is contemplating having an EV charger and other electrical appliances fitted. He asked me if he has a 60A or 100A supply. From this pic, it looks like a 100A supply with 60A fuse fitted for some reason. He wants it to be 100A. Any ideas?

 

[7029 dave]

How long ago were you with them?

I left at the end of 2020

 

[Julie.]

I remain in touch with colleagues who still work for the DNO, they would be apoplectic if a meter fitter started changing their equipment such as fuses!

 

[John-SJW]

You sure about that?
Sounds a bit of a conspiracy

Do you think the capitalists now running our utilities are whiter than snow?

 

[DPG]

Do you think the capitalists now running our utilities are whiter than snow?

They aren't sending blokes out in the middle of the night with increasingly small fuse sizes.

You don't use the word 'scamdemic' by any chance do you?

 

[timhoward]

Do you think the capitalists now running our utilities are whiter than snow?

Do you think anyone gives a flying fuse?

 

[Lister1987]

Bs1361 and bs88 service fuses are 30, 40, 50, 60, 70, 80, 90 and 100A

60, 80 and 100A being the common ones.


Others such as j type or A3, A4 etc are indeed 63A

That may be where I'm getting muddled.

 

[John-SJW]

Do you think anyone gives a flying fuse?

Yes they do. If you were old enough to remember before the money men came in, the service was vastly superior.

 

[DPG]

Going back to the original question, has your friend contacted the supplier yet?

 

[John-SJW]

Have not seen him yet. He was assessing going all electric with an EV charger. I asked him if his supply was man enough. So it is with him. If and when I will report back what the DNO says.

As a few have noticed, it looks like a full 100A supply with a 60A fuse, so it would be interesting what they say.

 

[nicebutdim]

As a few have noticed, it looks like a full 100A supply with a 60A fuse, so it would be interesting what they say.

No one has stated anything of the sort.

 

[littlespark]

Some EV chargers come with load shedding now… (or is that most chargers?)
They measure the total load of the house and will cut off the charger if someone turns the shower on or something… to decrease the total load at any one time.

So having a 60A main fuse shouldn’t be a problem.

 

[DPG]

Have not seen him yet. He was assessing going all electric with an EV charger. I asked him if his supply was man enough. So it is with him. If and when I will report back what the DNO says.

As a few have noticed, it looks like a full 100A supply with a 60A fuse, so it would be interesting what they say.

Can you give references for the posts from these few people.

 

[timhoward]

Some EV chargers come with load shedding now… (or is that most chargers?)
.....
So having a 60A main fuse shouldn’t be a problem.

Indeed.
A sign a thread is getting a bit long...when nothing seems to be being taken on board...and early answers get repeated again! (post #10)

As a few have noticed, it looks like a full 100A supply with a 60A fuse, so it would be interesting what they say.

Having just read all 52 previous posts, I gently suggest you are the only person who thinks it looks like that.
For once, a bunch of electricians actually all unanimously agree on something - that is an ex-parrot a 60A supply.

 

[littlespark]

Sorry, @timhoward , I didn’t look back that far.

 

[freddo]

A lot of that style of cutout around here are replaced by the DNO if greater than an 80A fuse is required.

 

[Risteard]

Bear in mind you have to apply to connect with advance permission from the DNO to have more than 60A per phase with an EV.

 

[John-SJW]

Indeed.
A sign a thread is getting a bit long...when nothing seems to be being taken on board...and early answers get repeated again! (post #10)

Having just read all 52 previous posts, I gently suggest you are the only person who thinks it looks like that.
For once, a bunch of electricians actually all unanimously agree on something - that is an ex-parrot a 60A supply.

No. Most thought it looked like a 100A carrier and tails and supply cables but clearly a 60A fuse..

 

[John-SJW]

Some EV chargers come with load shedding now… (or is that most chargers?)
They measure the total load of the house and will cut off the charger if someone turns the shower on or something… to decrease the total load at any one time.

So having a 60A main fuse shouldn’t be a problem.

That is the case with many. But if going all electric, with a 7kW plus induction hob and maybe an 11.5kW instant electric water heater or 9Kw immersion, electric UFH and a Quooker tap, etc. Something like a Garo may need to be used to de-prioritize the heating. Assuming the EV charger has integrated load shedding, if not then that will need de-prioritizing with the likes of a Garo,

That is if it is limited to 60A. If the supply can get to 100A then matters are easier, as been mentioned in the thread.

 

[DPG]

No. Most thought it looked like a 100A carrier and tails and supply cables but clearly a 60A fuse..

Yes, it is a 100A carrier. The DNO may not provide a 100A supply though. This is not hard to understand.

 

[John-SJW]

Yes, it is a 100A carrier. The DNO may not provide a 100A supply though. This is not hard to understand.

I am pretty sure most understood that from the outset.

 

[DPG]

I am pretty sure most understood that from the outset.

Most did. You seemed to struggle, and then misquote people though.

 

[John-SJW]

Most did. You seemed to struggle, and then misquote people though.

I did no such thing.

 

[John-SJW]

An update. He spoke with E-On about his supply. Two years ago when a smart meter was installed, he was with BG. The lady told him that the handover documentation tells them that when the smart meter was installed, the tails were changed from 16mm to 25mm and also documented that I he was upgraded from 60A to 100A. They left the 60A label on not removing it.

So all OK. I do hope there is a 100A fuse in there.

 

[John-SJW]

So all OK. I do hope there is a 100A fuse in there.

If not then maybe Pablo will have a look.

 

[timhoward]

An update. He spoke with E-On about his supply. Two years ago when a smart meter was installed, he was with BG. The lady told him that the handover documentation tells them that when the smart meter was installed, the tails were changed from 16mm to 25mm and also documented that I he was upgraded from 60A to 100A. They left the 60A label on not removing it.

So all OK. I do hope there is a 100A fuse in there.

Are they seriously saying a smart meter installer uprated the supplier fuse?! Really?!

 

[John-SJW]

That is what they told him. The question is still there. Is teh fuse 60A or 100A? Maybe he should get Pablo from the DNO to have a look.

 

[littlespark]

There is one way of knowing for sure…..


But it means deliberately overloading it, and noting what the DNO replace it with.