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I would write, board only fitted by myself, high zs readings upon testing, unable to carry out full inspection due to building fabric, all connections at db have been checked and are correct, r1+r2 readings are not enough when added to this Ze to cause this high zs.......additional protection by RCD is in place.
 
Well no your readings should be 0.23 if you did a figure 8 at the board and tested at each point on the ring?
Something don't add up to me and you need to have good results and thorough tests to prove the main earth is at fault, especially if you are getting good readings of .43ohms with the Ze?
 
I think as for the ring reading, you should go to each point of use, and take the highest reading, now if there was a spur of a reasonable length off the ring the ohms would be higher on this than a pure ring and this would be the value entered on the cert as proof of meeting the disc time.

J
 
But you have the choice as to whether you should power it up, this whole thread worries me.

J

With additional proTection by rcd is in place then 1667 ohms is the highest zs, we have 6ohms here, that's 1661 ohms less that the maxium.....although that is totally unrealistic zs and should be investigated but even then the regs states anything over 200ohms. So he has done everything to bs7671 here.
 
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With additional proTection by rcd is in place then 1667 ohms is the highest zs, we have 6ohms here, that's 1661 ohms less that the maxium.....although that is totally unrealistic zs and should be investigated but even then the regs states anything over 200ohms. So he has done everything to bs7671 here.

Sorry in advance! Thats a poor attitude to take. I can honestly say that i'v never left an installation like that. Something is obviously wrong so it needs sorting end of.
 

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