TomsFocus Posted May 22, 2022 Share Posted May 22, 2022 5 minutes ago, Tizer said: If the fan has an overrun then that is quite frightening if someone who does not know what he is doing ever tries to change it. Overrun as in staying on after the light is switched off? Yes it had that. I say 'had', because a new fan was also fitted to pass the new regs, despite the old one appearing to work ok. I always wondered how the overrun worked (but clearly not enough to look into it!)...wasn't sure if it had a capacitor that released power after switch off, or if it kept pulling mains power and had some sort time delay switch? Quote Link to comment Share on other sites More sharing options...
MarksST Posted May 22, 2022 Share Posted May 22, 2022 1 minute ago, TomsFocus said: Overrun as in staying on after the light is switched off? Yes it had that. I say 'had', because a new fan was also fitted to pass the new regs, despite the old one appearing to work ok. I always wondered how the overrun worked (but clearly not enough to look into it!)...wasn't sure if it had a capacitor that released power after switch off, or if it kept pulling mains power and had some sort time delay switch? They have a timer triggered by the light being used, the fan also has a permanent live to it which runs the fan. 2 Quote Link to comment Share on other sites More sharing options...
TomsFocus Posted May 22, 2022 Share Posted May 22, 2022 3 minutes ago, MarksST said: They have a timer triggered by the light being used, the fan also has a permanent live to it which runs the fan. Thanks Mark! Quote Link to comment Share on other sites More sharing options...
StephenFord Posted May 22, 2022 Author Share Posted May 22, 2022 Well, had no idea my original 'simple' question would have sparked off such an interesting thread! Good to know we have so many knowledgeable electricians as members here... As someone who can just about to wire a plug, I've learned alot... 😁 4 Quote Link to comment Share on other sites More sharing options...
Tizer Posted May 22, 2022 Share Posted May 22, 2022 1 hour ago, TomsFocus said: I say 'had', because a new fan was also fitted to pass the new regs, despite the old one appearing to work ok. The old one may not have had the correct IP Rating for the zone that it is in, either that or if the Landlord is not a private one then whoever is in charge of maintenance is ripping them off. I've had experience of that for other things as well, especially Services. 1 Quote Link to comment Share on other sites More sharing options...
Jonro2009 Posted May 22, 2022 Share Posted May 22, 2022 5 hours ago, StephenFord said: Afraid I don't have 'isolator' switches, they weren't part of build code when house built 30 years ago... That's a shame. I'm afraid I'm out of suggestions that don't involve additional wiring ☹️ Quote Link to comment Share on other sites More sharing options...
Jonro2009 Posted May 22, 2022 Share Posted May 22, 2022 2 hours ago, StephenFord said: Well, had no idea my original 'simple' question would have sparked off such an interesting thread! No pun intended of course 😉 1 Quote Link to comment Share on other sites More sharing options...
StephenFord Posted February 20, 2023 Author Share Posted February 20, 2023 Yes, it's an old thread, but as I started it, I feel entitled LOL I was replacing an LED bulb in the kitchen, you know, the ones that last 10000 hours! (). On the way, I thought I would try it in the downstairs toilet - it worked perfectly! No flickering whatsoever, and also allowing the extractor fan to work too. I suppose it's like using a CanBus bulb in a car where it shows no faults. So all those suggestions of a re-wire, or new fittings, no need. Just a nice new modern bulb in a 30 year old fitting! 2 Quote Link to comment Share on other sites More sharing options...
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