ev charger installation

[SimonD]

I've got a retired electrical engineer doing the 2nd fix electrics with me but passed me on to another guy to install an ev charger in our remote garage. Unfortunately, this one has disappeared into one of those trades black holes and just doesn't get back to me.

 

I have a problem because I've got open trenches partly used for national grid to install my permanent supply, but also to take the cabling down to the garage.

 

So, my plan is to just install this with the retired electrical engineer and then get it covered with the  part p inspection. question is, what stuff do I need to install the infrastructure now and for the future?

 

I'm putting in 25mm cable and the sparky who was supposed to do the job mentioned its useful to have a control cable, but I don't know what this is?

 

Can someone here list everything I need from my meter tails to the ev charger, so I can get these trenches filled in and stop getting hassled by my wife about getting a proper charger instead of the wall plug?

 

Thanks!

[Alan Ambrose]

This is one possibility - ‘ev ultra cable’:

 

https://www.tlc-direct.co.uk/Manufacturers/DC/SyncEV/index.html

 

I think probably ok for trenches but check. As far as I can see, armoured cat5 plus armoured power would work as well. Probably some separation regs for the various cables in one trench.

[Dan F]

  On 15/02/2025 at 11:56, SimonD said:

I'm putting in 25mm cable and the sparky who was supposed to do the job mentioned its useful to have a control cable, but I don't know what this is?

Expand  

 

Control cable is often used to connect a CT clamp of some kind and allow the EV charger to do load management.  Some EV chargers also have ethernet connection.  Don't think load management is required, but depending on your main fuse size and expected load may be a good idea to have in place.

This can be a seperate cable, as @Alan Ambrose said, doesn't have to be special all-on-one EV cable.   

 

25mm2?  Is this 50m+?  Seems overkill otherwise..

[SuperJohnG]

Always use a duct. A large one then you can add cables as you please later and push that decision down the road.

[G and J]

Been looking into this for our meter kiosk install. EV point is right next to kiosk but house is further and I’ve been advised to whack in a 110mm twin walled flexi duct to future proof.  I’ve also been told to go 25mm2 armoured cable to get tiny voltage drop (circa 10m). 
 

Could you just drop in a large duct to defer your decisions?