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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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Electrical Problem
One that has us stumped:
In bathroom had a light fitting that one day suddenly stopped working. First thing tried was to change the light bulb (screw type) - no luck. Got a normal pendant and fitted this to the wiring and it worked. But when I got a replacement bathroom fitting and wired up the light it doesn't work again. So at present still using the normal pendent light. Have tried three different fitting still no luck. Appears to be : Junction Box-----two wire Join------fitting. Have tried to replace the wiring between the join and the fitting with no luck, the wiring appear to be live at the fitting anyway. Any ideas on this one? (Not me, posted in the third party) Steve |
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"Steve Peake" wrote in message .. . One that has us stumped: In bathroom had a light fitting that one day suddenly stopped working. First thing tried was to change the light bulb (screw type) - no luck. Got a normal pendant and fitted this to the wiring and it worked. But when I got a replacement bathroom fitting and wired up the light it doesn't work again. So at present still using the normal pendent light. Have tried three different fitting still no luck. Appears to be : Junction Box-----two wire Join------fitting. Have tried to replace the wiring between the join and the fitting with no luck, the wiring appear to be live at the fitting anyway. Any ideas on this one? (Not me, posted in the third party) Steve It sounds like a loose neutral connection, or the bulb being used has been busted during all the taking down and putting up again. A neutral break will show as a live supply when you use a mains tester screw driver, and to make sure that the circuit is actually continuous through all conductors you need to use a multi-meter to test it. It's called a continuity test. |
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On Mon, 11 Jul 2005 14:38:16 GMT, BigWallop wrote:
It sounds like a loose neutral connection, or the bulb being used has been busted during all the taking down and putting up again. I know the bulb is fine, it was swithced between a screw for the old fitting and a baynet for the temp one. A neutral break will show as a live supply when you use a mains tester screw driver, and to make sure that the circuit is actually continuous through all conductors you need to use a multi-meter to test it. It's called a continuity test. Could you explain this one, would that mean that the Neutral side is live? Steve |
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"Steve Peake" wrote in message .. . Any ideas on this one? I have had screw in bulbs that fail to make contact with the centre connector. I had to apply some solder to make them work. |
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"Steve Peake" wrote in message ... On Mon, 11 Jul 2005 14:38:16 GMT, BigWallop wrote: It sounds like a loose neutral connection, or the bulb being used has been busted during all the taking down and putting up again. I know the bulb is fine, it was swithced between a screw for the old fitting and a baynet for the temp one. A neutral break will show as a live supply when you use a mains tester screw driver, and to make sure that the circuit is actually continuous through all conductors you need to use a multi-meter to test it. It's called a continuity test. Could you explain this one, would that mean that the Neutral side is live? Steve No, the neutral side is completely dead because it's broken or disconnected somewhere. For electricity to be useful it must flow correctly back to the supply from whence it came, this needs the use of two insulated conducting paths (Live and Neutral). If the live is still properly connected and unbroken then a test with a mains tester screw driver type of device will show it as live, but the same tester won't show if the neutral path is still fully operable. The use of a meter to check that both live and neutral paths are still properly connected is the only safe way to make sure that the circuit has a continuous loop for the electricity to flow around. So, the fault you have sounds by your description like a break or disconnection on the neutral path away from the circuit, as you say the live is still show OK on your mains tester screw driver. Is this correct? But you have no means to safely test the neutral path for breaks or disconnection so you can't say it is OK by using your tester screw driver. It could also be the switch that has gone belly up of course. |
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dennis@home wrote:
"Steve Peake" wrote in message .. . Any ideas on this one? I have had screw in bulbs that fail to make contact with the centre connector. I had to apply some solder to make them work. 2nd'ed with the screw caps. Also, had the same with bayonets - although these tend to work if "wiggled". |
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On Mon, 11 Jul 2005 15:46:11 GMT, BigWallop wrote:
The use of a meter to check that both live and neutral paths are still properly connected is the only safe way to make sure that the circuit has a continuous loop for the electricity to flow around. So, the fault you have sounds by your description like a break or disconnection on the neutral path away from the circuit, as you say the live is still show OK on your mains tester screw driver. Is this correct? But you have no means to safely test the neutral path for breaks or disconnection so you can't say it is OK by using your tester screw driver. Thats something to check, not sure how the basic pendant fitting seems to work fine, but the bathroom fitting doesn't though. The other post about the batch of bulbs being too short for that type of screw fitting also sounds possible (as the pendant has baynet so it wasn't the same type of bulb fitted) Cheers All Steve |
#8
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"Steve Peake" wrote in message .. . One that has us stumped: In bathroom had a light fitting that one day suddenly stopped working. First thing tried was to change the light bulb (screw type) - no luck. Got a normal pendant and fitted this to the wiring and it worked. But when I got a replacement bathroom fitting and wired up the light it doesn't work again. So at present still using the normal pendent light. Have tried three different fitting still no luck. Appears to be : Junction Box-----two wire Join------fitting. Have tried to replace the wiring between the join and the fitting with no luck, the wiring appear to be live at the fitting anyway. Any ideas on this one? (Not me, posted in the third party) Steve You don't describe the fitting but... I was called out by a friend who had changed the lamp in the shaving light but it didn't work. However I refitted the lamp cover - which has a contact on it - and then it was OK. Peter |
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