very high earth loop readings - Page 2 - Electricians Forum | Electrical Forum | An electrical forum for electricians in the UK

sparkyork · 22-07-2008

thanks guys, the house is empy and getting refurbed at the minute, ive pulled the fuse on the circuit that concerns me for now and turned the board off.
im going back on the 11th august and will be fitting a 17th board so rcd wise it will be fine. like you say checking other circuits to see what reading getting off them would be good for next time. would of done that when i was there but it was the end of the day and just did a quick test on that circuit for me own benefit.

from what ive seen at this stage, is theres an swa coming across the basement ceiling that appears to be the mains incomer, i did see an ec15 atached to the sheathing of this cable and am concerned that this is what the elcetric board has in mind for a suitable earth connection!! lol

any ways im back on that job soon so will let yas all know me findings.

linzilou72 · 23-07-2008

Quote:

Originally Posted by sparkyork

thanks guys, the house is empy and getting refurbed at the minute, ive pulled the fuse on the circuit that concerns me for now and turned the board off.
im going back on the 11th august

What the hell are the other trades using for power then

sparkyork · 23-07-2008

no other trades in there, the owner is a good friend of mine and is currently in france, having power off is no problem.

sparkyork · 18-09-2008

finally got back to this job...

turns out the swa coming across the basment cieling is definately the incomer and when it enters the service cut out there was a bonding clamp on it, which at first looked like some sort of tn-s setup....

i was getting high readings and did a quick earth loop at socket outlet and got 67 ohms, i went to the old board and connected on the tails and on to thei eath clamp on the incomer...Error 4 .. no earth connection, then founf a 2.5 earth going down some pipe boxing and turns out that the main earth was onto the water supply! tut!

so phoned up yedl and have arranged for them to come out and convert it to PME for £31. things is they cant do it for 12 weeks so im gonna sink an earth rod in for now just to get the new board sorted out etc...

ian.settle1 · 22-09-2008

Quote:

Originally Posted by sparkyork

finally got back to this job...

turns out the swa coming across the basment cieling is definately the incomer and when it enters the service cut out there was a bonding clamp on it, which at first looked like some sort of tn-s setup....

i was getting high readings and did a quick earth loop at socket outlet and got 67 ohms, i went to the old board and connected on the tails and on to thei eath clamp on the incomer...Error 4 .. no earth connection, then founf a 2.5 earth going down some pipe boxing and turns out that the main earth was onto the water supply! tut!

so phoned up yedl and have arranged for them to come out and convert it to PME for £31. things is they cant do it for 12 weeks so im gonna sink an earth rod in for now just to get the new board sorted out etc...

What type of meter are you using? used a Megger 2500LC somw time back kept getting the same error code booklet said it was a buffer overflow when i contacted AVO, the engineer said that it was detecting noise on the circuit whic I was testing thats why the error kept coming up.

sparkyork · 22-09-2008

yeah ive had this before, however all fuses were pulled and nothing was connected, tuned out that the armouring didnt have any sort of earth on it!! surely the other end must be connected to something!? so electric board said they can make it pme but got a good reading after sinking earth rod in so its up to customer now.