more electrical stuff

[Rabbithunter 456]

I will add. I done a continuity test on between Phase & CPC.... and it came up with >1000ohms (open circuit) which is fine. But its just doing the Ins. Res. Tests when we get crap readings. R1-R2, Earth Fault Loop, Ring final continuit etc...... are all fine

[Gav 1,708]

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?

 

That sounds like a good idea mate, link it all out without any sockets inline, or maybe do an ins test on each socket. You are going about it the right way and its bloody annoying I know. I am pretty reluctant to give advice if I cant see the instalation as you will appreciate yourself, popping up with ideas will just add to your quandry.

 

Just an after thought : did you do the tests after screwing the sockets back or leaving them loose?

 

Let us know if you get to the bottom of it

[Rabbithunter 456]

sockets screwed back mate..... no insulation of any conductor caught,l i know, i screwed them back

 

much appreciated for info gav...

 

i think i'll be ins. res'ing the actual socket's tommorow.

 

All the ins tests are over 1ohm, thus complying with reg's.... i better start marking my test sheets with >200Mohms rather than >1000Mohms

 

cheers

RH

[Guest oneredtrim]

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Edited July 2, 2008 by oneredtrim

[Gav 1,708]

When was the last time your meter was calibrated?

 

A callibration is just a means of making sure it complies with the same readings as other test instruments and not if it working correctly! If it was not working correctly it would be quite apparent, not callibrated would mean it would not give the same readings as another intrument. I dont think this is an issue here.

[Gav 1,708]

sockets screwed back mate..... no insulation of any conductor caught,l i know, i screwed them back

 

much appreciated for info gav...

 

i think i'll be ins. res'ing the actual socket's tommorow.

 

All the ins tests are over 1ohm, thus complying with reg's.... i better start marking my test sheets with >200Mohms rather than >1000Mohms

 

cheers

RH

 

Screwing the sockets back does increase forces on internal components which if faulty could highlight these readings. Try an insulation test on a few sockets first then if you find no faults try linking the circuit with connectors without any thing inline, I would be suprised if the results all come back the same.

 

Good luck.

[Rabbithunter 456]

thanks for the input, but the issue here is not callibration....

 

cheers

RH

[Guest oneredtrim]

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Edited July 2, 2008 by oneredtrim

[Guest oneredtrim]

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Edited July 2, 2008 by oneredtrim

[Rabbithunter 456]

aint a clue oneredtrim.....

 

just tested a house today which another gang first fixed.... and had similar low readings.....

 

as you say the common denominator is the cable, the test meter..... AND.....our bloody apprentice !!

[Guest oneredtrim]

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Edited July 2, 2008 by oneredtrim

[scouser3038 1]

When was the last time your meter was calibrated?

 

Took the words out of my mouth!!! its practically impossible to get this scenario unless the megger is f****d!!