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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Some lights not working. Strange voltage readings !
Hello all,
We have a strange problem with our electrics. Our main living room light does not work or the wall lights in the same room. Same thing in the master bedroom and one of the lights in the hall. All other lights in the house are fine. I invited a friend over who knows something of electrics and he checked the fuses and took voltage readings at the light fixture and the at switches. He found that there was no voltage at the switch ( about 3V ) but managed to get a reading of 246V at the light fixture in the lving room. He got about 150V in the hall !!! We both thought you should either get 0V or 240V !! Does anybody know what could cause these strange readings or have had similar problems in their house ? Cheers |
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Some lights not working. Strange voltage readings !
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Some lights not working. Strange voltage readings !
Richard Snell wrote:
Hello all, snip He found that there was no voltage at the switch ( about 3V ) but managed to get a reading of 246V at the light fixture in the lving room. He got about 150V in the hall !!! We both thought you should either get 0V or 240V !! Digital meters can often measure the small capacitive currents induced by wires lying next to each other. This is not a 'real' voltage, if there is any load, it will fall to zero. |
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Some lights not working. Strange voltage readings !
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Some lights not working. Strange voltage readings !
In article , Ian
Stirling writes Richard Snell wrote: Hello all, snip He found that there was no voltage at the switch ( about 3V ) but managed to get a reading of 246V at the light fixture in the lving room. He got about 150V in the hall !!! We both thought you should either get 0V or 240V !! Digital meters can often measure the small capacitive currents induced by wires lying next to each other. This is not a 'real' voltage, if there is any load, it will fall to zero. Also the mains voltage is "nominally" 240V but I've seen it as low as 200V and as high as 265V. If he found no voltage at the switch, sounds like he was measuring across the switch? To get anything meaningful, one meter probe has to go to earth or neutral, the other probe to the voltage being measured. -- Tim Mitchell |
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Some lights not working. Strange voltage readings !
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