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Discuss Extranous conductive parts in the UK Electrical Forum area at ElectriciansForums.net
THIS ^^^^t's a bit odd how it can test as low as 22K though, as you can clearly see both pipes being fed by plastic. Are there any other metal pipes coming off from those pipes, perhaps going straight into the wall, maybe hidden behind the insulation of the pipes?
He did the right test, detailed in Guidance Note 8.I'm guessing you used a megger tester to get that reading? Most normal testers would have given you the result in ohms or kiloohms, not as a fraction of a megaohm ..... If you did then do the test again using a multimeter.
That was interesting.
Are you sure those figures are "per meter"?.Some sites give similar resitivity readings (researchgate.net) "per centimeter".JW,s readings would naturally be a hundred times higher and add significantly to the overall resistanceThat was interesting.
I wonder where the figure of 1000Ω - 5000Ω of resistivity per meter for household water comes from then?
His readings are from the "actual water".The copper ends that the leads are attached to would have no effect on the resistance readingsI'm guessing the fact that John takes the measurement from the pipes and not the actual water
I don't think this is correct Avo. By my calculations, a larger cube will always have a lower resistance across the faces?You can make the cube whatever size you like and you get the same value.
Ah yes. Memory fail again!Square, not cube.
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