Earthing Concrete?

[RogertheBodger]

Hi All.

Can I have some opinions please on the value of using Re-bar cages in a house foundation as Earth connections for a TT system, when encased in concrete do they make a good connection to earth, or not so good?

 

[mayfair]

Rodger dont even think about it m8, pm me if you want help with tt regs

 

[Lighthouse Phil]

Once the concrete is dry, there'll be no conductivity.....

 

[Engineer54]

In a nutshell, Yes they do make a pretty decent earth connection!!! My house in Cyprus, has it's re-bar cage forming part of my overall TT system, along with the swimming pool re-bar cage!!

If this is a new build, i would also take and earth rod or two and connect these to the re-bar cage. If you want to go a stage further, adding carbon dust or granules to the concrete mix, then you'll almost certainly be very close too, or better the magic 1ohm base line, ....depending on the ground soil type, the building slab is sitting on....

 

[Engineer54]

Once the concrete is dry, there'll be no conductivity.....

And where did you glean that information from then?? You couldn't be more wrong!!!

 

[mayfair]

Roger answered your PM if you need a boliten please dont let them in on the ring trick. some get the hump

 

[not clever]

100% agree with E54.
Infact I think you'll find the method is in GN8 lists of recognised earth electrodes.

 

[Engineer54]

Roger answered your PM if you need a boliten please dont let them in on the ring trick. some get the hump

Hahaha!! ....The ring trick works just Fine Mayfair, ...just that it can get a little costly to do it right!!

 

[mayfair]

Spot on m8 not forgeting a bit of underseal on the jubilee clips nod nod wink wink.

Hahaha!! ....The ring trick works just Fine Mayfair, ...just that it can get a little costly to do it right!!

 

[johnboy6083]

Hahaha!! ....The ring trick works just Fine Mayfair, ...just that it can get a little costly to do it right!!

Go on then, spill the beans on this ring thing? Is it multiple earthing points linked together?