Lighting circuit problem

[kes123]

Hi. Lighting circuit problem. There is 230volts at the lighting fixture but at the switch
there is 6 volts. Now that is some kind of voltage drop.
I will run continuity test, isulation and earthing test tomorow.
just wondered if it was something someone has come across before.

 

[nikmet]

i would suspect a bad connection, sometimes conductor can be broken within the insulation, turn power off and give them a firm 'tug', a continuity test will point you in the right direction

 

[kes123]

All the other lights in the house work fine. No loose connections. I have a feeling that it is somekind of earth leakage. Its the 6 volts thing that baffles me

 

[nikmet]

The 6v is probably nothing to worry about http://support.fluke.com/find-sales/Download/Asset/2514193_6001_ENG_B_W.PDF

 

[kes123]

Hi it worries me because there seems to be no way of turning the light on and off. Its my own house and I have not drilled through any cables or anything like that. But now this light wont work. There is 240v at light but only 6 at switch. But it used to work fine and every other light works ok.

 

[Octopus]

Suggest you do continuity tests on the switch cable and see what that shows

 

[Farmelectrics]

full test on circut r1 r2 plus ir test will point you in right direction

 

[High Tower]

hi resistance joint somewhere

 

[kes123]

Hi I did a long lead continuity test on the light fitting on the live. It read o.35ohms. But for some reason its not controlled by the switch anymore.
Will do full set of tests in morning because it will get dark soon

 

[High Tower]

AQ long lead test is a r2 test, which carries no current!, you need to carry out a cont test of R1, test from the rose to the switch and back

 

[davetheraver]

I had same a few years ago found out a rat had bitten through cable and it killed rat as was still had teeth buried in cable
"any one for cooked rat lol"
Dave

 

[nickblake]

its most likly to be a failed joint at the ceiling rose the 6 volts you are getting is probably induced voltage in the cabling start at the ceiling rose check the connections then check the continuity of the switch wires , remove from the rose switch the switch on and sest across the wires see if there is continuity , but i put my money on a broken or loose wire in the rose .

Nick