Hi guys another q I would like to clear up,
when testing to confirm a pipe is extraneous in an existing install I use the equation 230/0.01 =23000ohms - 1000ohms= 22000ohms.
when carrying out the test I test from the earth block to the pipe in question.
just looking to confirm as I have just read on another post and site that you should pull the main earth out from supply cable and test from that ( obviously isolating the install first) so not to have any parallel paths
just wondering now weather I am right or wrong as in the G N 8 it states to test from MET so just looking for opinions as I have now got confused.
Cheers
when testing to confirm a pipe is extraneous in an existing install I use the equation 230/0.01 =23000ohms - 1000ohms= 22000ohms.
when carrying out the test I test from the earth block to the pipe in question.
just looking to confirm as I have just read on another post and site that you should pull the main earth out from supply cable and test from that ( obviously isolating the install first) so not to have any parallel paths
just wondering now weather I am right or wrong as in the G N 8 it states to test from MET so just looking for opinions as I have now got confused.
Cheers