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Discussion Starter · #1 ·
I don't currently own an EV, but hope to in the next 2-3 years. I'm starting the process of converting our garage into a couple of rooms, and I'm keen to make sure the infrastructure is set up so that we can easily add a charging point to the front of the house in the future. The conversion will make access to the fuse board (etc) much more difficult, so I'm keen to get all the hard work done now so that we don't have to ruin it all in a couple of years.

My question - is what I'm suggesting possible? Can a good electrician do this work or does a specialist need to be involved? What do I need to ask for, and what would the work actually entail? And in terms of the exterior bit of the house where the cabling will run out, can this be capped off and left, ready to be tapped in to in the future?

Thanks for all your help. Alex
 

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Nissan LEAF30
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Simple answer, any qualified electrician can do it. But the regs are changing constantly and anything done two to three years ago is unlikely to pass today.
Do you have an external meter? It's often better to split the supply after that and take a unique supply for the charge point from there rather than your "fuse board".
 

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Discussion Starter · #3 ·
The meter isn't external. The meter is currently sitting next to the consumer unit, in the middle of the garage. They're tucked away and quite neat, and don't need to be moved to make the garage conversion work.
 

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Kia e-Niro 4 MY20, Zoe Z.E.50 GT Line
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I'd echo the idea of splitting the tails off into a separate small consumer unit. Not having to run a continuous 30Amps through the domestic consumer unit just seems like a good idea to me. It also makes life easier if future regulations mean anything needs to change.

You could get a 32Amp commando socket installed, with it's own earthing if you want to meet the existing regs, to which you can then connect a portable EVSE like the Ohme cable with no future modification. They tend not to be aesthetically pleasing. I suppose you could put it in some sort of cabinet.
 

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LEAF N-TEC 62KW
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You need a separate 2 way consumer unit wired into a connection block which splits the feed to your existing consumer unit. This will be fitted with a 2pole (L+switched N) mcb to isolate / protect the supply to the outside.
Then run some 6 or 10mm Twin and earth cable (depending on distance) to an external wall box housing an RCBO or isolator (depending on the charger you fit). I personally would not use a commando socket, but hardwire the charger into the wall box's RCBO.
I fitted my charger in a wall box, but not the RCBO because this is less than a metre away in the porch. I also installed an earth electrode but, depending on future regulations etc, you may not need one.
Any electrician can do this work and by the time you are ready for the charger, most will probably be able to install chargers as well.
 

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Future proofing never works, just don't paint yourself into a corner. Install a decent conduit between the meter and the most likely charge point location/s. I know someone who cast in a load of scart cables in his walls to future proof it, guess how much use they are now?
 

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Future proofing never works, just don't paint yourself into a corner. Install a decent conduit between the meter and the most likely charge point location/s. I know someone who cast in a load of scart cables in his walls to future proof it, guess how much use they are now?
Conduit is a good idea if the route is not too tortuous.
 

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Yes, all you really need is to ensure you have a way to get the power from the meter/cu area to the place you expect the charger to be. Don't fit any equipment as the rules keep changing and you may end up having to replace stuff that's no longer compliant.

Large conduit or ducting works, but if that is tricky for some reason just run a 3-core SWA between the points - 6mm for a short run, 10mm for longer.
 

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Future proofing never works, just don't paint yourself into a corner. Install a decent conduit between the meter and the most likely charge point location/s. I know someone who cast in a load of scart cables in his walls to future proof it, guess how much use they are now?
I know what you mean but a 6 or 10mm (depending on the length of the run) T&E cable is unlikely to be obsolete, even if you end up isolating the earth wire.
 

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Do you have a citation for where that is specified?
That's a strange question. It's upto you and your electrician how your charger circuit is wired. But, no electrian worth his salt would wire it into the existing consumer unit because a problem with the charger, the wiring to it, or a car problem could leave the whole property without power. Therefore, it simply makes sense to fit a separate small consumer unit which is connected to you meter output, thereby requiring a (service) connection block so both consumer units can be connected.
This is the 2way consumer unit I have, one next to the existing consumer unit and one adjacent the charger.
 

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I know what you mean but a 6 or 10mm (depending on the length of the run) T&E cable is unlikely to be obsolete, even if you end up isolating the earth wire.
T&E if the wiring is indoors and just a small run externally to the proposed charger location (should be terminated in a weatherproof box, eg Schneider Electric 7-Entry Junction Box with Knockouts Grey 105 x 105 x 55mm
and not just have the ends taped up.
Steel wire armoured (SWA) would be appropriate where most of the cable run is on the outside of the property, or run underground.
 

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I'd also go with conduit. But if you do that, don't forget to install a "pull cord" in the conduit to make your eventual charger install easier
 

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T&E if the wiring is indoors and just a small run externally to the proposed charger location
Strictly it also depends on the risk of mechanical damage to the cable (not that SWA is fully proofed against that), and the type of T&E used needs to be UV stable which most are nowadays but it's worth checking. You can of course put the T&E in conduit for the outside run .....
 

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Conduit is a good idea if the route is not too tortuous.
Yep.

My place is wired with TV points in almost every room and co-ax throughout the house.

20 years later the cables are all stuck to the conduit, and I can get precisely none of them out because the cable is too weak.
 

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The conversion will make access to the fuse board (etc) much more difficult, so I'm keen to get all the hard work done now so that we don't have to ruin it all in a couple of years.

This doesn't sound ideal regardless of the future EVSE!

However, the basics in two years even if the details change will still require a high capacity cable run from existing supplies to near the point of future use.

Could you provide a rough floor plan of the conversion layout, plus an idea of where the pre-installed cable will run and the materials. EG, how far back from the finished surface, will it run through insulation?

Lastly, who is already onboard on your project on the electrical side of things
 

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Yep.

My place is wired with TV points in almost every room and co-ax throughout the house.

20 years later the cables are all stuck to the conduit, and I can get precisely none of them out because the cable is too weak.
Are things so desperate in Spain that you are having to sell the copper? :eek: ;)
 

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Discussion Starter · #19 ·
The conversion will make access to the fuse board (etc) much more difficult, so I'm keen to get all the hard work done now so that we don't have to ruin it all in a couple of years.

This doesn't sound ideal regardless of the future EVSE!

However, the basics in two years even if the details change will still require a high capacity cable run from existing supplies to near the point of future use.

Could you provide a rough floor plan of the conversion layout, plus an idea of where the pre-installed cable will run and the materials. EG, how far back from the finished surface, will it run through insulation?

Lastly, who is already onboard on your project on the electrical side of things
When I say "access to the meter and consumer unit will be more difficult" it will all be hidden in a cupboard in a room in the middle of the house, rather than openly accessible in the corner of the garage. It will still be accessible in a maintenance sense, but less so for running power to a charger installation.

Photos attached of the before and after floor plans, the current meter and consumer unit, and a couple of other pics for context.

Nobody is engaged yet - this is still very much in the ideas stage, and subject to remortgaging.
 

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Conduit would be great assuming you will not have too many bends. Single SWA cable may not be sufficient for some charge points (many of them also need a wire for the sensor). Also you may want to install outdoor lights or other gizmos in the future and you will find the conduit very convenient.

Otherwise, I would run 1 or 2 LAN cables along SWA.
 
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