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EV Home Charging - Wallbox Installation

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EV Home Charging - Wallbox Installation

Old 2nd Nov 2021, 17:57
  #21 (permalink)  
 
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Originally Posted by UniFoxOs View Post
Sorry Mickey, but Pilotmike is right - those photos do NOT show any evidence of looping. Your neighbours electricity is not passing through your meter. The two tails coming out of the meter look grey, but there will be an inner insulation that is red for one and black for the other (or blue and brown depending when they were installed) and they are the L and N feeds to your consumer unit. The corresponding inputs to your meter are the red and black ones, being the L and N from the supply. The N is also connected to the earth in the fuse assembly, meaning you will be on a PME (AKA TN-C-S) earthing arrangement.

If there is any looping done on this set-up the junction will be .in a sealed connector underground, and the best of luck to you in finding it.

PS after a closer look at the photo I can see the brown and blue inner insulation on the tails.
I don't think anyone is suggesting the loop is passing through the meter. The suggestion is that it comes in on one of the black cables at the bottom and out again on the other. Whether that's feasible or not I can't say.
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Old 2nd Nov 2021, 18:01
  #22 (permalink)  
 
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Originally Posted by Lyneham Lad View Post
Well, all I can do is point to post #15 and what SSE wrote i.e They will arrange a site survey to advise of the works required and also discuss with your neighbour the works required at their property. This will require consent from the 3rd party land owner to make any alteration to the network to unloop the supplies.

Of course, things would be much simpler if the supply was not looped!
LL..... I think the crucial point is in your msg # 06. Two cables coming into and out of the box below your fuse unit. With your neighbour there is only one......
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Old 2nd Nov 2021, 18:12
  #23 (permalink)  
 
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I am about to have my front garden paved over and want to lay a SWA cable to a suitable point for a future charger. What size cable do I need? it's about 10m length. I was thinking 6mm sq but do I need 10mm sq.
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Old 2nd Nov 2021, 18:27
  #24 (permalink)  
 
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Originally Posted by dixi188 View Post
I am about to have my front garden paved over and want to lay a SWA cable to a suitable point for a future charger. What size cable do I need? it's about 10m length. I was thinking 6mm sq but do I need 10mm sq.
Given that 10m of 10mm is only about £20 more expensive than 10m of 6mm it seems pretty obvious to me!
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Old 3rd Nov 2021, 12:46
  #25 (permalink)  
 
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You can now get a battery in a suitcase for those that cannot have a home charger

https://www.msn.com/en-gb/cars/news/...out&li=AAnZ9Ug
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Old 3rd Nov 2021, 14:26
  #26 (permalink)  
 
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Originally Posted by NutLoose View Post
You can now get a battery in a suitcase for those that cannot have a home charger

https://www.msn.com/en-gb/cars/news/...out&li=AAnZ9Ug
Well not exactly. That article says they're on track to make them available within a year.
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Old 3rd Nov 2021, 14:38
  #27 (permalink)  
 
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If you ca get a battery that small that will charge the car .. why not just put it into the car, make it removable and take it someplace else to recharge it.
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Old 3rd Nov 2021, 15:24
  #28 (permalink)  
 
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Originally Posted by Dave Gittins View Post
If you ca get a battery that small that will charge the car .. why not just put it into the car, make it removable and take it someplace else to recharge it.
I suspect the 20 miles range it supplies would be a limiting factor
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Old 3rd Nov 2021, 16:38
  #29 (permalink)  
 
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Originally Posted by Avionker View Post
I suspect the 20 miles range it supplies would be a limiting factor
Get two and you can come home again
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Old 3rd Nov 2021, 19:50
  #30 (permalink)  

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I am about to have my front garden paved over and want to lay a SWA cable to a suitable point for a future charger. What size cable do I need? it's about 10m length. I was thinking 6mm sq but do I need 10mm sq.
The cable size is governed by the load and associated voltage drop. You need to assess the distance from the consumer unit to the charger. Then use a table like this to calculate the voltage drop per metre. For example 6 mm≤ 3 core SWA has a voltage drop of 6.8 mv/amp/metre. The voltage drop for the load expected should not exceed 4% of the nominal supply voltage of 240v i.e. 9.6v.

As someone said 10mm≤ is not that much more expensive although it is slightly tougher to handle and terminate.
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Old 4th Nov 2021, 11:00
  #31 (permalink)  
 
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Hi, thanks for the replies re. cable size. I will go with 10mm cable.
What is the current drain of a charger, or is it different for each type of car?
It will be several years before we go electric, I just want to future proof my front garden.
Dixi.
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Old 4th Nov 2021, 11:38
  #32 (permalink)  
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Originally Posted by dixi188 View Post
Hi, thanks for the replies re. cable size. I will go with 10mm cable.
What is the current drain of a charger, or is it different for each type of car?
It will be several years before we go electric, I just want to future proof my front garden.
Dixi.
The most common chargers for home installation are 7kW. Assuming 240V this equals 29.2A.
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Old 4th Nov 2021, 11:40
  #33 (permalink)  
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If you really want to future-proof it, don't lay a cable. Lay a duct - I use something like 1 1/2" waste pipe, or 2 1/2" downspout glued together with solvent weld, with a 45 degree on each end to bring it out at the surface. I put a length of rope through as I do it, which can be used to pull through anything later on - power cables, comms cables, fibre optic - whatever the future might bring.
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Old 4th Nov 2021, 13:37
  #34 (permalink)  
 
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UniFoxOs,
Thanks for the advice.
I have some 30mm water pipe so will lay that underground.
I don't know why I didn't think of that as that is what I did at my last house for power, lighting and telecoms.
I use an air jet from my compressor to blow a piece of binder twine through with a piece of rag tied to the end.
Before I retired this would have been discussed with fellow workers and various ideas would have been considered. I don't have that any more.
Dixi.
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Old 4th Nov 2021, 14:06
  #35 (permalink)  
 
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That is exactly what our builder did. When the phone company arrived, the duct and string were in place so the cable could be run under the drive and up to the hole in the wall.
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Old 4th Nov 2021, 16:10
  #36 (permalink)  
 
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Originally Posted by dixi188 View Post
UniFoxOs,
Thanks for the advice.
I have some 30mm water pipe so will lay that underground.
I don't know why I didn't think of that as that is what I did at my last house for power, lighting and telecoms.
I use an air jet from my compressor to blow a piece of binder twine through with a piece of rag tied to the end.
Before I retired this would have been discussed with fellow workers and various ideas would have been considered. I don't have that any more.
Dixi.

Now you just have us lot......... Ohhh dear..
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Old 4th Nov 2021, 16:28
  #37 (permalink)  
 
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Originally Posted by NutLoose View Post
Now you just have us lot......... Ohhh dear..
Christmas has come early 🤫
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Old 4th Nov 2021, 16:47
  #38 (permalink)  
 
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Originally Posted by Ninthace View Post
That is exactly what our builder did. When the phone company arrived, the duct and string were in place so the cable could be run under the drive and up to the hole in the wall.
Donít forget to attach another piece of string to the cable before you pull it through. That way you have a pull through in place should you decide to run anything else in there in the future.
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Old 4th Nov 2021, 17:11
  #39 (permalink)  
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I just usually make the string twice as long - the spare can look untidy but it gives you the option of pulling from either end, whichever is more convenient. It's also quicker if pulling in more than one cable - either pull it back each time, or tie the ends together to form an endess loop and tape your cables on wherever comes to hand.
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Old 4th Nov 2021, 20:56
  #40 (permalink)  
 
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Originally Posted by NutLoose View Post
Now you just have us lot......... Ohhh dear..
It could be worse!
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