Unused Earth Rod in Garage.

Zoomup: 
So was it installed for possible E.V. charging use? The garage is very small and a modern car would struggle to get into it. Also the single garage is cluttered with stuff including a freezer and tumble dryer. The car is forced to sit on the drive.

That's normal nowadays. If an EV socket is in a garage and might reasonably be used for a car in the garage, there are no concerns about PME earthing.

Mind you, yesterday I noticed an EV whose lead squeezed under the garage door. I suspect that such an arrangement might be commonplace.

There’s no concerns about the PME earthed installation in the garage because of that sheet of polythene under the concrete.

Putting an EV charger externally mounted on the garage wall is a whole different matter. 

Back in the 1980’s I had a year working as a Site Manager for a volume house builder and filled the electric supply applications in.

There was a list of properties which would not be supplied with a PME earth including houses with quarry tile floors, because back then most houses with quarry tile floors did not have a sheet of plastic under them as a damp proof membrane, I now see many breaches of that rule.

A garage without a damp proof membrane under its concrete floor should not be supplied from a PME earthed electrical installation.

Sparkingchip: 
 

Back in the 1980’s I had a year working as a Site Manager for a volume house builder and filled the electric supply applications in.

There was a list of properties which would not be supplied with a PME earth including houses with quarry tile floors, because back then most houses with quarry tile floors did not have a sheet of plastic under them as a damp proof membrane, I now see many breaches of that rule.

A garage without a damp proof membrane under its concrete floor should not be supplied from a PME earthed electrical installation.

Which regulation covers that then Sparkingchip?

Z.

 

Why is it there? Was it left for a possible electric vehicle charger?

 

Z.

I think that this would be  a good assumption, especially for a PME supply (722.411.4).

Also, I seem to remember a lot of talk about Foundation Earthing in the draft of the 2nd amendment to the 18th edition?

Zoomup: 
 

Sparkingchip: 
 

Back in the 1980’s I had a year working as a Site Manager for a volume house builder and filled the electric supply applications in.

There was a list of properties which would not be supplied with a PME earth including houses with quarry tile floors, because back then most houses with quarry tile floors did not have a sheet of plastic under them as a damp proof membrane, I now see many breaches of that rule.

A garage without a damp proof membrane under its concrete floor should not be supplied from a PME earthed electrical installation.

Which regulation covers that then Sparkingchip?

 

Z.

DNO requirements, no damp proof membrane, no PME earth terminal provided.

At that time it was not up for discussion, some years ago two new supplies were run into adjacent houses, an existing Victorian cottage with quarry tiles laid on sand and a new house with concrete floors over insulation and a damp proof membrane, both supplies come out of the joint in the street and were installed together.

I did the complete installation in the new house and replaced the consumer unit in the existing house, the new house has a TNCS-PME earth terminal provided by the DNO, the existing house has a TT earthed installation, because of the floor construction.

You won’t find it in BS7671, there’s more to consider than The Wiring Regulations.