Pointers on installing TT Earth Electrode on a construction site

[silentboarder69]

Hi,
I've got to install an earth electrode on a construction site. It's just a house, and there is a PME supply, but no meter yet, EDF want the electrode installed. I've tried putting the electrode in the ground and then did an EFC test and got 64.8 ohm reading.
Should the this reading be lower, and if so, how? Should I bury the electrode deeper?

Thanks for your help!

 

[Deleted member 26818]

Have EDF not given you a maximum Ra for the electrode?

 

[silentboarder69]

Nope. Should they?
But that aside, is there any regs on where and how deep the electrode should be?

 

[Deleted member 26818]

No not really.
BS7671 recommends an Ra below 200Ω.
In general, the deeper the rod, the lower the Ra.

 

[silentboarder69]

OK, many thanks for your help!

 

[Blowcat]

I have put a few rods in for temp site electrics and never been given any guidence from the LEB but we go for under 200 as spin says. Luckily 1 rod has always done it in london.