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The 20V doesn't really exist, it's capacitive coupling from adjacent wires.
Could be a extra low voltage light fed through a transformer hidden in the ceiling.
@flameport, thanks. The light circuit is on though, and the lamp works - could this be Capacitive Coupling? Why am i not reading 240V (other than possibly using the voltmeter wrong!)?
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That's what flameport said it was in his reply!
20V with respect to what? Which two points are you measuring between?
Alias51, please for your own safety seek professional advice. You have another active thread where you ask if your 240v light fitting needs a transformer to be powered from 240v mains. Now you're going around your house pointlessly probing mains terminals with your (probably very cheap) multimeter, probably up a metal ladder. This advice is for your own safety. If you're going to learn to use a volt meter please do so on batteries or your car where you're not going to end up dead if you slip/trip.
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I wonder how you are measuring with my lights to get a meter probes into the bulb holder without the risk of slipping and causing a short circuit would be hard. Even with a GS38 lead set.
Most cheap meters are not supplied with leads suitable for use with 230 volt. The meter maybe OK but the leads are not, GS38 leads can cost more than the meter.
You may be reading between earth and a live and the earth could be missing, you could have a 12 volt lamp and the meter does not like the high frequency so giving wrong reading. But sticking probes in holes without knowing what you are doing can be very dangerous.
Most cheap meters are not supplied with leads suitable for use with 230 volt. The meter maybe OK but the leads are not, GS38 leads can cost more than the meter.
You may be reading between earth and a live and the earth could be missing, you could have a 12 volt lamp and the meter does not like the high frequency so giving wrong reading. But sticking probes in holes without knowing what you are doing can be very dangerous.
I've NEVER tried to stick my probes into a pendant lamp holder. Just test at the rose. Pretty sure that's what the OP is doing.
Don't you have a set of Lightmates?! The bayonet pins have fallen off of the BC one on mine, bloody expensive rubbish.
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Possibly in which case he has 4 connectors to select from wonder which he used?
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I did have one of these
To get 20V I would have thought switched live (off) to E or N
No, because like you point out, they're bloody expensive rubbish! I have made one myself for Hager Click Roses with some 30A connector blocks and a spare end, but for BC and ES pendants, I just drop the cover. No big deal
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