Earthing question?

[Ross1]

Hi guys, I've got 2 x 10mm/sq at cu. 1 of them is giving me a ze reading of 176 ohms and the other 1 won't test on my fluke mf 1653b it is a tt install but no sign of rod.

How do I tell wether I'm getting a reading thru the gas or water bond, no signs of bonding any where.

Thanks

 

[telectrix]

first if there's no bonding to gas or water, tou won't get your Zeaffected by them. yhis needs further investigation, as in find the rod or fit a new one , then go from there. get the bonding installed etc.

 

[WPD Lad]

What's in the MET?

 

[1shortcircuit]

Are you sure there is an earth?

Is the system definitely TT and not an alternative supply missing an earth connection?

Always useful in situations like this if you take a picture to upload, even phones will do in most cases:thumbsup

*** Edit - Just read the comment about no sign of any bonding anywhere ***

 

[Ross1]

There is no MET, just 2 10mm/sq single earths disappearing into wall.

Why am I getting 100 odd ohms on the one 10mm and then when testing on the other 10mm my tester makes a funny noise and won't test......think it comes up with error code 4. Im testing both exactly the same.

 

[1shortcircuit]

Are you getting sound contact on all terminals? I had a similar situation the other day when testing for Zs on a shower and I was adamant that I had sound contact but I had a re-shuffle, unplugged leads and re-plugged gave the fused connectors a good push to ensure they were connected properly and I then obtained a satisfactory reading.

 

[Ross1]

Are you getting sound contact on all terminals? I had a similar situation the other day when testing for Zs on a shower and I was adamant that I had sound contact but I had a re-shuffle, unplugged leads and re-plugged gave the fused connectors a good push to ensure they were connected properly and I then obtained a satisfactory reading.

Yeah checked all contacts etc
keeping in mind that this is a house that been renovated about a year ago (full rewire) no ring mains, spurs from many sockets, 2 socKets never worked. DIYer by the looks. Old board with no cover on it, so any thing possible here if you get my drift

 

[GLENNSPARK]

is this a semi?....or a terrace?.....shared supply maybe....just because you have a cutout at the C/U for this house doesn`t mean owt.......could be that the supply comes from next doors cutout into yours and its THEIR earthing arrangements or extranious that your reading.....