TT system testing

[sparky1ste]

Hi-just a quick one?
I do a lot of testing but i dont often test TT systems.Am i right in saying that the earth electrode reading i get goes in the earting sytem section and not the ze box.does the ze box get n/a entered.i test using method 2 with a multifunction tester[Fluke].is there any regs stating the permitted zs for TT as the readings are high-hence earth electrode +r1+R2 as my software program always fashes up high zs when entered values

 

[PAUL M]

you measure your earth electrode resistence and record it in the box marked earth electrode resistance Ra,n/a for Zs.the electrode resistance should be less than 200 ohm,but anything over 100 ohm could be unstable,test should be done in least favourable conditions ie,dry.oh and keep a bucket of water handy when testing.

 

[sparky1ste]

thanks paul

 

[PAUL M]

thanks paul

no probs though you probably shouldnt take my word for it as i am just a no good domestic installer so i dont know jack.

 

[sparkyork]

job ive just been on had 543 ohms on the electrode! gonna upgrade his main earth and maybe even try a new rod or summat, then **** all over the rod when testing! lol

 

[Cirrus]

Yup, get the garden hose on it