Cable needed for 7KW EV charger

My garage is not joined to the house, a metre wide path separates it.

At the moment power to the garage is via a 13 amp plug-in socket inside the house, with a short length of 16 amp flexible core which goes into a back box containing a choc bloc connector where it joins some 2.5 t&e that goes through the wall, under the path (inside a piece of gas pipe !!) and into the garage.

Originally it was just a spur off the single house ring main (1976 build) and done before I came here, including the use of gas pipe as a conduit. In fact even the main EDF incomer enters the house under the front door inside some yellow gas pipe, along the top of the slab next to the party wall and up into the wylex meter box. Only 4 inches of screed 'protected' this cable. Obviously done by a professional SEEboard electrician.

I have added the 13 amp plug so that the gge is now a 'portable appliance'.

If I proceed with the EDF car tarriff and their £299 charger what sort of cable would this require ?.

The CU is about 10 metres from the point where the charger could be fitted. Maybe 12 at most.

The cable would come through the void above the lounge ceiling through the cavity wall, down the outside of the house, under the path and up into the garage. I guess this would mean SWA but does that mean an additional box is needed next to the CU to terminate the SWA with a gland ?. Or do modern metal CU's accomodate a cable termination like this ?.

I might as well use this to provide garage power and light too but at some point someone will demolish the garage because that would allow space for a 2-story 12 metre by 2.5 metre side extension, so an economic solution might be better.

Reply to
Andrew
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At only one metre gap, could you use overhead conduit with T&E inside it?

Owain

Reply to
spuorgelgoog

Not sure. The dpc of the garage is about 3 brick courses higher than the house.

Do you mean core drill the garage and house and have some 38 mm conduit,about 1.5 metres long going right through both walls (*)and dead level (and siliconed in ) ?.

(*) at the height of the void above lounge ceiling .

There is a 38 mm black conduit under the garage floor and it runs parallel to the 4 inch salt glazed pipe that holds the 3/4 inch gas pipe as it exits the the garage, under the path and up inside the lounge, where it used to feed the backboiler and thence to the kitchen.

Exactly where this 38 mm plastic conduit goes is a mystery. It points in the direction of the wylex wall box in the hall, but seems to be empty. Strange.

Reply to
Andrew

You might want to consider economy seven and a timer on your charger. Then you could charge up overnight on cheap electricity which I do when PV power is low.

Take care, if you have economy seven, they put day price of electricity. You need to do some calculations. Including what else you could do by night.

Reply to
harry

The EDF "car" tariff he's considering offers cheap rate for 98 hours a week, but E7 only offers 49 hours a week.

Reply to
Andy Burns

It wouldn't have to be level, and you could have an inverted U if you want more headroom. Surface box on wall, conduit up over and down to surface box on other side.

Steel conduit costs, but is quite highly reusable, or of there's little risk of it being damaged PVC conduit might be acceptable. The main thing is it would avoid SWA.

Owain

Reply to
spuorgelgoog

As the installation would be arranged by EDF or EO why not ask them to tell you what they'd do within the fixed price of £299, what if any prior work or extra charges would arise in your circs, if you'd get 3.6 or 7 kW, etc

Reply to
Robin

What you get is:

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<quote>

?Standard Installation? means an installation that can be carried out at the Site without any additional site preparation works, man hours or additional equipment to install the Equipment and shall include, but not be limited, to the following:

a. fitting of the Equipment on to an internal or external, existing brick or plaster wall, or to another suitably robust permanent structure at the Site; b. up to 10 metres of cable, neatly clipped to the wall(s) or run in suitable trunking fixed to the wall between the main electricity distribution board and the Equipment; c. fitting and testing of electrical connections and protections required; d. an additional individual consumer unit, if required; e. installation of a Type C MCB or a Type A RCD/RCBO in an enclosure; f. an earth rod in soft ground, if required; </quote>

"Non-standard installations may incur an additional fee and will be discussed and agreed with you prior to your installation."

And the chargers they offer are 7kW, they don't offer 3kW.

The above covers roughly everything except overhead or underground trunking. So you could ask them to quote for the additional works, or offer to provide suitable conduit yourself into which the standard install will fit.

Theo

Reply to
Theo

Thanks. (I am ashamed as I did search the EDF site for the T&Cs but failed to find that).

Reply to
Robin

Check your email

Reply to
ARW

I've just taken another look. Despite the gge dpc being higher tha the house, the flat roof is below the level of the house joists, so quite a downhill slope would be needed, so water would track into the garage.

Reply to
Andrew

Indeed. The all-weekend half price is tempting. even the peak rate is less than the std variable rate.

And as the FAQ states - "you can use it anywhere in the house".

Reply to
Andrew

There be some catches. Do you own or are you about to buy an EV?

It seem that you need to be available for the OLEV grant in order to get the "special offer".

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Reply to
ARW

I noticed a house in the village with one of these charge points. It as on the outside front corner, and black round cable about 15 mm diameter goes up the wall, along the top of the bay window, and then I can't see where it goes. This must be SWA ?.

Reply to
Andrew

Mmmmm :-

1.12 The Customer acknowledges that in order to remotely control and manage their Equipment and to take up other services, offers and discounts that may be offered by EDF Energy the Customer may be required to download and install an Application to their smart phone and/or a tablet device,

I don't have a smart phone, or a tablet :-)

Reply to
Andrew

Well I am genuinely thinking about it, since I only do a low mileage.

What would be the typical cost of installing one of those '£299' charge points without the grant ?. Have you installed any ?.

If some EV cars need an AC charger and some a DC charger (as I interpret the charger at the local library). How do these domestic charge points do it ?.

Reply to
Andrew

Probably. Although my post was for Robin to check his email.

I just wanted to run some figure past him.

Reply to
ARW

Fit a meter and power the neighbours electrics at the weekend. Charge a mid point between what you pay and they pay and make some free money....

Reply to
ARW

We joined the OLEV charging "let's see how much money we can get for free off the government whilst they are dishing out the grants scheme" last year. Done a few, but it seem South Yorkshire is a bit slow on the uptake of EVs ATM.

You will not be needing or getting a DC charger if you go ahead (or are eligible to get one at that price). You will be getting a 32A AC supply.

Reply to
ARW

not if you make a drip loop/

Reply to
charles

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