Discuss Lower Ze reading than expected in the UK Electrical Forum area at ElectriciansForums.net
sorry .. 0.03 ohms is Ze measured at both the switched fuse and again in the flat , each time having the earth disconnected, the first time at Switched Fuse and the Second at the earth bar so really Ze@db. the 0.12 ohms is Zsdb in the flat... which i would expect to be higher given the large metal pipes that feed the heating system across the development which are linked into the earth bar with a 10mm earth cable.Sorry, I'm a bit lost here - what measures at 0.12 ? And then you get impedance dropping to 0.03 when you go further from the cut out into a flat? Can you explain again, cheers.
it is no good if you can not trust your mft giving you false reading.However the variance Kewtech claim raises ones eyebrow a little...
Mine works perfect, always has, always will . Hang on, just gotta go sacrifice a fatted lamb or summat.In work we have nearly 20 MFTs so could justify buying the Megger test box, cracking bit of kit that gives us the option to test loop impedance. I have to say all the Meggers and Metrels we have are always within range. The Flukes can be a little more temperamental.
I don't think we'll be buying Kewtech in the near future...
I thought the 0.12 was the Zdb not the Ze???Keep in mind I've now started pain killing rituals here, but I'm lost again. I got 0.03 as Ze measuring L-E with the earth dis from the board, but why does it rise to 0.12 when the other bonding is included?
Mine works perfect, always has, always will . Hang on, just gotta go sacrifice a fatted lamb or summat.
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