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2 electricity supplies to one building

Former Community Member
Former Community Member
Hello, I am a not an engineer but need some advice on uk wiring regulations please. 

A national utility company is fitting a 32A charger in my garage for an electric vehicle. 

The garage is detached from my house but there is an existing circuit from the house consumer unit to the garage for lighting and a power socket. The cable runs along a garden wall. 

The new charger will have its own cable run from the same consumer unit in the house down to the garage. 

My problem is that the engineer who came to do the installation refused to do it as he said the garage is a building in its own right and regulations do not allow 2 supplies to one building.

My question is: Do 2 wiring circuits from the same consumer unit constitute 2 supplies If the consumer unit is located in an adjacent building? 

I would have thought that this was still a single supply and to have 2 supplies you need 2 separate meters with 2 consumer units which is not the case here but then, as I said, I’m no engineer. 

Edit.....The engineer stated that the regulation related to avoiding the risk of a voltage between 2 different earths. To me this again only makes sense if you were talking about 2 totally different supplies from different meters and therefore possibly different sub stations etc.
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    Well done Wally so it does, very foolish of me, obviously, I didn't count the 0s on my calculator correctly! So that is £30,000 per charge unit, which does not sound quite so bad, but is still totally unreasonable, and thinking about it does not sound enough. In fact, it is slightly different, £30,000 for every domestic property in the UK, and loads more for the trucks and Motorway services. To do this £3,000 needs to be added to every domestic electricity bill, every year for the next 10 years. Still politically totally impossible, 75 percent of households would not be able to afford it! It cannot be suggested that borrowing the money is sensible either, a depreciation rate of 10% PA may be a little high, but still, the money could never be collected back from consumers. One can see why Germany is struggling with electricity prices.
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    Well done Wally so it does, very foolish of me, obviously, I didn't count the 0s on my calculator correctly! So that is £30,000 per charge unit, which does not sound quite so bad, but is still totally unreasonable, and thinking about it does not sound enough. In fact, it is slightly different, £30,000 for every domestic property in the UK, and loads more for the trucks and Motorway services. To do this £3,000 needs to be added to every domestic electricity bill, every year for the next 10 years. Still politically totally impossible, 75 percent of households would not be able to afford it! It cannot be suggested that borrowing the money is sensible either, a depreciation rate of 10% PA may be a little high, but still, the money could never be collected back from consumers. One can see why Germany is struggling with electricity prices.
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