Rabbithunter 456 Posted June 21, 2008 Report Share Posted June 21, 2008 ok. so we have just fully re-wired a house. Two lighting circuits, giving off bad IR readings..... REALLY bad phase to earth was as low as .280MegOhm on a 500 setting Useing a loop in, to the lights, ie; only one 1.5mm cable at switch's....except two way switch's, obviously. Disconnect all the switch drops. test them individually.... P-N P-E & E-N ALL READ >1000Mohm on each of the switch drops. We split the light circuit..... Go to end of line, so we're testing from bathroom light, through fan isolatotor and into bedroom1. Readings as above. Then we test from bed 1, to bed 2, bed 3, and back down to the board. readings all >1000 Okay, everything has been tested. Just for good measure i zap another 500 from the board, through the lights....and get poor readings....... How come we're getting poor readings one way, and good readings the other? Quote Link to post Share on other sites
nasher 1 Posted June 22, 2008 Report Share Posted June 22, 2008 hello mate disconnect the fan and isolator and just make sure you havnt missed anything like dimmers etc we had a post office like that we were having a nightmare untill we found a fused spur under the counter feeding a fan atb nasher Quote Link to post Share on other sites
Guest oneredtrim Posted June 22, 2008 Report Share Posted June 22, 2008 (edited) . Edited June 25, 2008 by oneredtrim Quote Link to post Share on other sites
Rabbithunter 456 Posted June 22, 2008 Author Report Share Posted June 22, 2008 yeah the earth's were disconnected. Never though about disconnecting them from the fan spur. Although its in the "off" position, the earth will still be continuos right through the fan, yeah? I'll be trying that first thing tommorow morning. CHEERS Quote Link to post Share on other sites
nasher 1 Posted June 23, 2008 Report Share Posted June 23, 2008 yeah the earth's were disconnected. Never though about disconnecting them from the fan spur. Although its in the "off" position, the earth will still be continuos right through the fan, yeah? I'll be trying that first thing tommorow morning. CHEERS all depends is it a fan switch like the 2 pole jobs??has it a fan icon on it ??u got pm for that 17th edition site atb nasher Quote Link to post Share on other sites
Malt 379 Posted June 23, 2008 Report Share Posted June 23, 2008 I'm no sparky, but is is possible you have a reversed connection somewhere? Quote Link to post Share on other sites
maty j 6 Posted June 23, 2008 Report Share Posted June 23, 2008 I'm no sparky, but is is possible you have a reversed connection somewhere? i dont think that would change it to be ok one way and it to be out on 'tother. if that was the problem though, it would of shown up on polarity check anyway. Quote Link to post Share on other sites
Rabbithunter 456 Posted June 23, 2008 Author Report Share Posted June 23, 2008 I'm no sparky, but is is possible you have a reversed connection somewhere? Appreciate your input, but no, there is nothing "reversed" Quote Link to post Share on other sites
Malt 379 Posted June 23, 2008 Report Share Posted June 23, 2008 I'm no sparky, but is is possible you have a reversed connection somewhere? Appreciate your input, but no, there is nothing "reversed" Well I did say I wasn't a sparky! I was in the construction trade, and I've seen some stranger things though. I plastered this house once, and as it was nearing completion, the owner decided to test his boiler out. About half hour after the heating was turned on, his wife came running out of the toilet in fits of laughter. We went to have a look, didn't see nothing wrong at first, then she flushed the chain! It was the first time I've ever seen a hot flushing toilet! Quote Link to post Share on other sites
maty j 6 Posted June 26, 2008 Report Share Posted June 26, 2008 Sounds quite nice mate. Would save you bit on bog roll Did you find out what it was R? Quote Link to post Share on other sites
Rabbithunter 456 Posted June 26, 2008 Author Report Share Posted June 26, 2008 nah mate. Not yet, even our gaffer is stumped. Though, we tested the reel of cable. And that came up with crap results also....... BUT now we are getting shit readings on our Ring Main (in a diff. house !!!!!! ) Quote Link to post Share on other sites
Gav 1,708 Posted June 26, 2008 Report Share Posted June 26, 2008 Is it PME ot tns or tnts ? Maybe that could account for it? Are you using BASEC cable or cheap import carp, had a do with one once cheap import and was missing insulation on L & N in the same place when we stripped it. Quote Link to post Share on other sites
Rabbithunter 456 Posted June 26, 2008 Author Report Share Posted June 26, 2008 its a T-N-S when we do the ins. res. test, for example on a ring main, the two 2.5's are completely out the board, so i doubt that what sort of supply would make any difference. We are using good cable, forgot the name of the stuff. But I've used it for years without problems. cheers Quote Link to post Share on other sites
Gav 1,708 Posted June 26, 2008 Report Share Posted June 26, 2008 Has damp had chance to get in i.e weeks before second fix/test is the place cold and damp? To tell the truth I used to independantly test for the NICEIS and have had some strange readings from originals, without actually seeing the instalation and being able to see the r1+r2 and insulation readings its a bit confusing and dont want to add to your problems. Sorry. Quote Link to post Share on other sites
Rabbithunter 456 Posted June 26, 2008 Author Report Share Posted June 26, 2008 gav. I'll give you the latest scenario. !st & 2nd fixed up stairs ring yesterday (wednesday) and done the dead test's today. From the board, i got L-N >1000 L-E 509 E-N 613 somewhere along those lines........ I disconnected a socket, approx half way round the circuit. so i test from the board to that socket, everything read >1000. I test from that socket, round the rest of the installation. low readings.... I disconnected another socket further round. So i test between the two disconnected sockets. Then i test from the second dissconnected socket, back to the board. Both leg's came up fine (>1000 on each test) I connect both sockets back, and then test again from the board, and get poor readings again. It's baffling me.......... all the second fix work was good, because i went and re-done it all after our apprentice made a bad job of it. Perhaps the problem lays in the actual sockets? Maybe worth testing them? Quote Link to post Share on other sites
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