Advice please guys.

[sjm]

The origin is TT with a SWA supply 63 amps 100 ma S type RCD to house. House is 30 metres away through 2 x farm type barns.
I have installed a new earth rod for the house, so my question is should I leave the earth connection to SWA armour at the house or only earth the SWA at the origin supply end and rely entirely on the new earth rod for house earth. Ze for earth rod is 85 ohms so pretty good. Zs at house board (inc armour and bonding) is 17 ohms.

Thanks in advance.
Steve.

 

[Rockingit]

If I'm reading this properly, you've now got (or would have) an earth rod at each ends of the armour supplying the house, yes? As far as I can see, so much the better as you've just reduced your Ze figure a bit more. It's no different than hammering in two rods in one place to achieve the same.

 

[billy110]

sounds dangerus mates

? ? ? ? ? ?

 

[Rockingit]

If I'm reading this properly, you've now got (or would have) an earth rod at each ends of the armour supplying the house, yes? As far as I can see, so much the better as you've just reduced your Ze figure a bit more. It's no different than hammering in two rods in one place to achieve the same.

This should of course actually be your Zdb figures, reflected in your Zs measurements, and assumes that you've properly banjo'd both ends into something which is also eventually via various routes bonded back to the MET. Hence why a measured Zs is almost never ever exactly Ze+(R1,R2) due to parallel earth paths.