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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Electrical Questions >> Electric car charging point https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1476120624 Message started by CWatters on Oct 10^th, 2016, 6:30pm

Title: Electric car charging point
Post by CWatters on Oct 10^th, 2016, 6:30pm

If I was to have a car charging point installed it would make sense for it to be located in/on my garage rather than the wall of my house.

I already have a garage CU fed by a 32A MCB in the CU in the house and underground SWA cable.

One web site says..

Quote:

Charging Solutions home systems are available with ‘standard’ (16A 3.2kWh) or ‘fast’ (32A 7kWh) charging capability

I'm aware I will have to physically check the cable size/cross section and length etc but cant do that at the moment.

I think the current distance is around 25-30m (House CU to Garage CU) but it would be more like 35-40m from the house CU to charging point.

Online calculators suggest the existing cable to the garage is probably 6sqmm but might be 10sqmm if I'm lucky.

Am I correct in assuming that if it's 10sqmm I'll probably be OK but it's 6sqmm it will be marginal or need upgrading?

Title: Re: Electric car charging point
Post by Lectrician on Oct 12^th, 2016, 5:54pm

It depends what else is being used in the garage?

7Kw is far better. It is recommended to be done in 10mm on a 40amp type C MCB.

Title: Re: Electric car charging point
Post by CWatters on Oct 13^th, 2016, 5:54pm

There are several 13A sockets and lights in the garage but not currently used for anything significant. However part of the garage would be ideal as a workshop so might get used for more in the future.

Ok so it looks like I will be upgrading the cable if it's currently 6sqmm but might get away with it if it's 10mm already.