EV Charger Installation - Cabling Query?

[JK-Electrical]

Who thinks there is fire proof fixings within that trunking

Now that you've mentioned it, I'm sure the OP will be opening the trunking lid to see.

 

[pirate]

But for your suggestion, JK, I doubt he would have done so.
(Did you see what I did there? LOL!)


(Goes off to get a life...)

 

[hyeung]

Judging from the photos you have posted, I can't see anything wrong with this install. Tails are fine, correct type of RCD.

Did the electrician give you an Electrical Installation Certificate in respect of the work? If so, what type of earthing system has the electrician listed on the certificate in respect of the charger? TN-C-S or TT? Could you post a close-up photo of the charger?

Was the install carried-out through the OLEV Homecharge Scheme?

Yes certificate details see attached.
Looks like its TN-C-S; Charger is EO Mini Pro.
Assuming from the certificate that the work conforms to Reg BS7671?
Apologies due to my lack of electrical knowledge, the last few posts regarding suitability of 10mm cabling didn't mean much?
But I assume the conclusion is that the 10mm cabling used (feeding the new ev board) is all good?

It's just that some "others" have specifically mentioned that tails need to be rated at 100AMP i.e. 25mm cabling; this was my initial concern?
So hence, I just wanted to clarify this?

Yes also, the charger unit has been installed next to the garage door, so yes I could still potentially charge the car outside with the cabling routed outside. But will mainly only charge inside tbh, which is why I have it installed inside the garage.

Regarding earth protection; the EO Mini Pro unit has a some DC Leakage Protection feature built-in; hence, am I right to assume its got earth protection in some ways?
i.e.
"Earth Leakage Protection
A dedicated 30mA Type A RCD must be used on the supply circuit Integral 6mA DC leakage detection – no Type B RCD required"

 

[westward10]

If that is 6mm T&E he has the cpc size wrong on that schedule.

 

[DT1991]

If he put the R1+R2 maybe we could calculate it

 

[HappyHippyDad]

Hi,

We had a EV charger installed recently over the past day ie 32amp 7.2kw. In the fuse cupboard I’ve attached before and after photos.
I have a 100amp fuse for the house.

For the new EV board setup, should the 2 grey cables entering the EV board (10mm) be the same 25mm thickness as the other cables?

Would this cause any issues for me? Or is this against certain electrical standards?
Someone mentioned to me if I was to change the meter or DNO were to action any new improvements, that I’d have to get these 10mm cables changed before any work would be carried out in the future?

I have yet to settle on the work, so if there’s non standard work complete here due to this, I would be in a position to highlight and query the relevant electrical company. I would appreciate any advise?

Please excuse, as my knowledge in electrical stuff is non existent. It maybe that all is looks fine, and I’ve been given wrong advise.

Regards,
HY

View attachment 51231

View attachment 51232

As the others have said the 10mm tails are absolutely fine. They meet the existing regulations as the maximum demand they can ever be expected to need is 32A. They also meet the requirements for fault protection.

I realise you have mentioned a number of times that 'someone' has told you they need to be 25mm but they do not. They would need to be 25mm if they were supplying your main consumer unit (even then they may not need to be).

I would be more concerned with whether an earth rod has been installed for this install. The EO website makes no mention that their unit can be used with the earthing supply you have (i.e PME) and therefore you should have had an earth rod installed. In fact the following link by EO states clearly you should have an earth rod installed for use with their unit.

Help Center Closed - Zendesk

eocharging.zendesk.com

lastly, it's easy for us to make mistakes as we are not there. I would ask the electrician who installed it if he has installed an earth rod and if not then why? He would hopefully quote one of the 3 exceptions from BS7671 722.411.4.1 but I think this is unlikely.

 

[hyeung]

As the others have said the 10mm tails are absolutely fine. They meet the existing regulations as the maximum demand they can ever be expected to need is 32A. They also meet the requirements for fault protection.

I realise you have mentioned a number of times that 'someone' has told you they need to be 25mm but they do not. They would need to be 25mm if they were supplying your main consumer unit (even then they may not need to be).

I would be more concerned with whether an earth rod has been installed for this install. The EO website makes no mention that their unit can be used with the earthing supply you have (i.e PME) and therefore you should have had an earth rod installed. In fact the following link by EO states clearly you should have an earth rod installed for use with their unit.

lastly, it's easy for us to make mistakes as we are not there. I would ask the electrician who installed it if he has installed an earth rod and if not then why? He would hopefully quote one of the 3 exceptions from BS7671 722.411.4.1 but I think this is unlikely.

I'm pretty certain there is no external earth rod installed for this.
As the unit has been installed for use internally; is this perhaps the reason why no earth rod was installed or required?

 

[davesparks]

It's just that some "others" have specifically mentioned that tails need to be rated at 100AMP i.e. 25mm cabling; this was my initial concern?
So hence, I just wanted to clarify this?

Yes, lots of people get their regulations knowledge this way, by listening to 'others' who loudly proclaim their version or (mis) understanding of the rules as the truth.

There is a guide to the regulations which has a picture of a 'typical' domestic supply with 25mm tails feeding a single consumer unit which then supplies the whole installation. Many people fail to understand that this is just an example of a typical installation.

 

[hyeung]

Yes, lots of people get their regulations knowledge this way, by listening to 'others' who loudly proclaim their version or (mis) understanding of the rules as the truth.

There is a guide to the regulations which has a picture of a 'typical' domestic supply with 25mm tails feeding a single consumer unit which then supplies the whole installation. Many people fail to understand that this is just an example of a typical installation.

This was one of the main reasons why I posted on here, as i'd be more confident in getting the truth than from others without an electrical background....and only knowing some knowledge which is rather dangerous. As I didn't know any better, thought this would be the best course of action.

However, it is interesting that a point was raised on the appropriate earthing? If my install was used outside, then I would no doubt want to ensure that a separate earthing rod was installed. As it is used internally, are we saying that we still need an earthing rod? or is that where the exception occurs which is why the installer did not quote or require this?

 

[Deleted account]

I'm pretty certain there is no external earth rod installed for this.
As the unit has been installed for use internally; is this perhaps the reason why no earth rod was installed or required?

Is it possible to charge the vehicle when it is parked outside? Will the charge lead reach? If so it must be TT

Or does the vehicle have to be parked fully in the garage for the lead to reach? If so pme is fine.

 

[hyeung]

Is it possible to charge the vehicle when it is parked outside? Will the charge lead reach? If so it must be TT

Or does the vehicle have to be parked fully in the garage for the lead to reach? If so pme is fine.

Firstly, when I requested the install I obviously didnt know of these requirements on earthing etc.
I asked the installer that I wanted the charging unit internally within the garage and also stated on the given location of the unit. The unit sits next to the garage door from the inside.
When i use the charger i've always planned to use this internally - so car is fully parked inside.

However, to answer your question. It would be technically possible to charge the car outside provided that the car is reversed into the driveway and the garage door remains open.
I don't know if it would be possible to close the garage door and have the cabling routed outside to charge - as this might cause damage of the cabling?

Note that I don't actually have my car delivered yet, so I cant even charge it at this stage.

 

[Deleted account]

The whole instal looks to be to a very good standard. I think the installer has done well and despite my previous post I wouldn’t be too concerned.

I did the EV charge course and the one thing that seemed contradictory was the placement internally of a charge point. If it’s parked inside on a pme the charge point should be pme if it’s parked outside it should be TT.

What happens if it’s both as yours is?
In theory changing the whole of the installation to TT which is way over the top. I don’t like that solution at all.

For this reason and other points I won’t go into I don’t install these units until a better safety system has been designed and built into the units.

 

[DT1991]

Pete the whole install doesn't require TTing just the charging point in this instance.

 

[hyeung]

The whole instal looks to be to a very good standard. I think the installer has done well and despite my previous post I wouldn’t be too concerned.

I did the EV charge course and the one thing that seemed contradictory was the placement internally of a charge point. If it’s parked inside on a pme the charge point should be pme if it’s parked outside it should be TT.

What happens if it’s both as yours is?
In theory changing the whole of the installation to TT which is way over the top. I don’t like that solution at all.

For this reason and other points I won’t go into I don’t install these units until a better safety system has been designed and built into the units.

To be fair with the installer, it was me that stated that location. As the car charge port is located on the rear left side of the car. So naturally the best place was to have the charger where I've stated. As my car will be parked inside all of the time, this was the deciding factor of having the unit inside the garage.
But at the sametime, i thought the location I've picked gives me some flexibility if I wanted to use this to charge the car outside. However, at the time I was not aware of the earthing requirements until now. So unlikely to use it outside and remain to charge indoors.

Is there a large cost to install an earthing rod for this application?
Also, curiously what are the risks if the unit is using PME and one was to charge outside?

Thanks

 

[davesparks]

Pete the whole install doesn't require TTing just the charging point in this instance.

But the charge point is inside, so it can't be connected to a different earthing system as the rest of the installation inside. You cannot mix two different earthing systems within one installation like this.