Here is a bit of a strange one.
On a recent rewire we checked the Ze on the lead sheath of the incoming network cable with the loop imp.tester....... reading 0.2 ohms .. seems ok. For reasons unknown I tried my ancient Drummond tester ( the one with the resistor in the lead).. live to cable sheath... lamp did'nt light..strange .
Tried the Imp.tester again.0.2 .. then third time reading went way up high,so applied for a change to PME ,sorry TNC.S.
Point is , we could have left the job with a dodgey main earth, where that 0.2 reading came from is anybodys guess !!
Deke
On a recent rewire we checked the Ze on the lead sheath of the incoming network cable with the loop imp.tester....... reading 0.2 ohms .. seems ok. For reasons unknown I tried my ancient Drummond tester ( the one with the resistor in the lead).. live to cable sheath... lamp did'nt light..strange .
Tried the Imp.tester again.0.2 .. then third time reading went way up high,so applied for a change to PME ,sorry TNC.S.
Point is , we could have left the job with a dodgey main earth, where that 0.2 reading came from is anybodys guess !!
Deke