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2 electricity supplies to one building

Former Community Member over 4 years ago

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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0 Simon Barker over 4 years ago

davezawadi (David Stone):

Hi Simon

Do you really believe this is the future of electricity? It would be nice if you answer this because when the electrical collapse occurs, it is unlikely that BS7671 will have any relevance any more, people will be dying in droves.

Yes I do. And coming up with ridiculous figures like £30 million in subsidies per car isn't helping anything.

We would already have electric trucks trundling up and down our roads, if it weren't for a global shortage of batteries. The savings on diesel fuel would be so huge as to make electric trucks a no-brainer for anything but the longest of journeys. The drivers have to take breaks every few hours, so all we need is chargers at every truck stop and the limited range isn't such a problem.

I can tell you really want to keep things just the way they are, and so all you can do is to find reasons why it's too difficult to change.
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0 Simon Barker over 4 years ago

davezawadi (David Stone):

Hi Simon

Do you really believe this is the future of electricity? It would be nice if you answer this because when the electrical collapse occurs, it is unlikely that BS7671 will have any relevance any more, people will be dying in droves.

Yes I do. And coming up with ridiculous figures like £30 million in subsidies per car isn't helping anything.

We would already have electric trucks trundling up and down our roads, if it weren't for a global shortage of batteries. The savings on diesel fuel would be so huge as to make electric trucks a no-brainer for anything but the longest of journeys. The drivers have to take breaks every few hours, so all we need is chargers at every truck stop and the limited range isn't such a problem.

I can tell you really want to keep things just the way they are, and so all you can do is to find reasons why it's too difficult to change.
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2 electricity supplies to one building

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