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Rank 2
May 27, 2025
Solved

Old fuse cut-out, isolation switch , possible meter tails upgrade in hope of fitting an EV Charger

  • May 27, 2025
  • 16 replies
  • 572 views

I’ll be looking to get a EV charger fitted in the future. 

I understand my fuse cutout (biscuit tin type) needs upgrading by the DNO which I have requested.

I suspect I need my isolation switch also changed . Can OVO do this , I’ve been told it is surprising this was not done , or reported when OVO changed the smart meter in 2021. (Should OVO have changed the meter with this old cutout ?)

Am I now likely to be charged for this service? Also unclear if the meter tails would need any upgrade. 

Any help with next steps appreciated 

 

 

Best answer by Lukepeniket_OVO

Hey all,

 

If the cutout is being changed why don’t we ask very kindly to the DNO (and provide hot beverages) if they could upgrade the tails and fit an isolator as they are there? I would assume they are removing that old biscuit tin iso, they might say no but worth a try.

You need 25mm Tails for EV installs =] Not that I am upselling but OVO do EV charger installs.

16 replies

BPLightlog
Super User
Super User
May 27, 2025

If you’ve asked your DNO about the cut out that’s a good first step. Perhaps this guide might help with the rest 

 

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Blastoise186
Super User
Super User
May 27, 2025

Hi ​@Scoobdriver ,

Would have answered this a bit faster but I needed time to dig some details.

It looks like there’s a problem with your setup that might warrant a rapid look-see from both OVO and your DNO:

  • It looks like you have a missing tamper seal on the Main Switch
  • You have a missing Neutral In Meter Tail despite Neutral Out being connected

If you’d like, we can do some research for you about how to get the Main Fuse swapped. All we need to ask is what region you’re in and we’ll dig into our toybox.

Securing energy by zapping security bugs... For that is The Blastoise Way! Remember, I'm just like you - AI Powered Evil Geniuses aren't Staff!
Rank 2
May 27, 2025

Hi ​@Scoobdriver ,

Would have answered this a bit faster but I needed time to dig some details.

It looks like there’s a problem with your setup that might warrant a rapid look-see from both OVO and your DNO:

  • It looks like you have a missing tamper seal on the Main Switch
  • You have a missing Neutral In Meter Tail despite Neutral Out being connected

If you’d like, we can do some research for you about how to get the Main Fuse swapped. All we need to ask is what region you’re in and we’ll dig into our toybox.

I would appreciate that, I suspected that OVO would need to be involved, and wasn’t sure why this was not highlighted when they swapped out the meter for a smart meter . I’m East Yorkshire and I understand my DNO is Northern Power Grid . 

Blastoise186
Super User
Super User
May 27, 2025

No worries - bear with me as getting that info may take an hour or two.

It looks like this install was actually done by SMS on OVO’s behalf, rather than by OVO itself.

Securing energy by zapping security bugs... For that is The Blastoise Way! Remember, I'm just like you - AI Powered Evil Geniuses aren't Staff!
BPLightlog
Super User
Super User
May 27, 2025

Hi ​@Scoobdriver ,

...

It looks like there’s a problem with your setup that might warrant a rapid look-see from both OVO and your DNO:

  • It looks like you have a missing tamper seal on the Main Switch

Althought it’s difficult to see as much of the wiring is behind the board, I take the main switch as being after the meter and so similar to a main isolator on the consumer unit.

  • You have a missing Neutral In Meter Tail despite Neutral Out being connected

It does look like there’s a missing neutral but as it could be an older TN system, the Earth connection takes over as the main Neutral. 

 

Bring me Sunshine ~ E&E {Solar PV, Battery Storage, Hybrid EV, ASHP and Home Assistant automation}
Blastoise186
Super User
Super User
May 27, 2025

Ok, just checked a couple of things.

Northern Powergrid does appear to offer a free fuse upgrade service - bearing in mind that some others charge for it - and they can swap that part out for you. I can’t say for sure about the Main Switch though - I’d suggest getting a private electrician to take a quick look as they can probably advise on that one.

If you do still need to have a Double-Pole Isolator, OVO can indeed do those. The price for that is £192.

Securing energy by zapping security bugs... For that is The Blastoise Way! Remember, I'm just like you - AI Powered Evil Geniuses aren't Staff!
Rank 2
May 27, 2025

Ok, just checked a couple of things.

Northern Powergrid does appear to offer a free fuse upgrade service - bearing in mind that some others charge for it - and they can swap that part out for you. I can’t say for sure about the Main Switch though - I’d suggest getting a private electrician to take a quick look as they can probably advise on that one.

If you do still need to have a Double-Pole Isolator, OVO can indeed do those. The price for that is £192.

Thank you , Does the meter need checking , Ref Missing Neutral , or how would I determine if the tails need upgrading ? Should the meter have been installed given the old cutout box ? 

I think it would be wise to have the Main switch upgraded to Double pole isolator , how would I request this through OVO ? 

Blastoise186
Super User
Super User
May 27, 2025

The easiest way is probably to get a local sparky to take a peek first and give a professional view on things. They’ll be able to advise on exactly what needs doing more easily than we can.

But yes, OVO can indeed fit a Double-Pole Isolator - it’s one of the jobs they can take on.

Securing energy by zapping security bugs... For that is The Blastoise Way! Remember, I'm just like you - AI Powered Evil Geniuses aren't Staff!
Abby_OVO
Community Manager
Community Manager
May 27, 2025

Hey ​@Scoobdriver 

 

I’m glad to see out volunteers have already stopped by with some really great advice on this already.

 

I just wanted to add to what Blastoise mentioned about the Double-Pole Isolator, you can book this with the Support Team for £192 (or £325 if your meter is three phase). You can view more about job prices on the following helpful topic:

 

 

I hope this helps.

Currently Playing: She's Electric
Rank 2
May 27, 2025

Hey ​@Scoobdriver 

 

I’m glad to see out volunteers have already stopped by with some really great advice on this already.

 

I just wanted to add to what Blastoise mentioned about the Double-Pole Isolator, you can book this with the Support Team for £192 (or £325 if your meter is three phase). You can view more about job prices on the following helpful topic:

 

 

I hope this helps.

 

Thanks All , Thanks Abby , what a helpful community  

 

I have contacted my DNO who have confirmed they will carry out an upgrade to the Fuse and Fuse cutout .

Will OVO upgrade the meter tails if required when fitting the isolator ? 

I’m confused as what is required if the tails from the new Fuse cutout to the smartmeter require upgrading , Looking at who owns what, I assume this is OVO responsibility , and I guess it needs to be co-ordinated with the DNO.