No ze at origin of tt system

[HappyHippyDad]

Barring any inaccuracies to the measurement I guess the soil resistivity could be very, very poor?

Could you try connecting the new rod to the old to see if that improves the Ra?

Also, could you try an RCD trip test on the RCD? If it trips then you know your measurement of 207V is incorrect and therefore not being measured accurately (as I dont think the RCD would trip if only 207 V L-E). Not sure about this last paragraph though! Just a thought.

 

[HappyHippyDad]

Barring any inaccuracies to the measurement I guess the soil resistivity could be very, very poor?

Could you try connecting the new rod to the old to see if that improves the Ra?

Also, could you try an RCD trip test on the RCD? If it trips then you know your measurement of 207V is incorrect and therefore not being measured accurately (as I dont think the RCD would trip if only 207 V L-E). Not sure about this last paragraph though! Just a thought.

 

[Adam Jackson]

Just to update on this problem. I thought i would walk down the road to the cottage next door to ask if i could plug my loop tester in a socket to see what reading i got and low and behold it read 201v. So looks like transformer problem, as got talking to them and they said they lost power earlier in the year due to lightning. WPD sending someone to look at transformer.

 

[Adam Jackson]

Just to update on this problem. I thought i would walk down the road to the cottage next door to ask if i could plug my loop tester in a socket to see what reading i got and low and behold it read 201v. So looks like transformer problem, as got talking to them and they said they lost power earlier in the year due to lightning. WPD sending someone to look at transformer.