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   alt.engineering.electrical      Electrical engineering discussion forum      2,548 messages   

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   Message 2,377 of 2,548   
   The Natural Philosopher to All   
   Re: Pifco Xmas tree lights   
   07 Oct 21 10:01:29   
   
   2d44d6ab   
   XPost: uk.d-i-y   
   From: tnp@invalid.invalid   
      
   On 07/10/2021 09:56, Tim+ wrote:   
   > Martin Brown <'''newspam'''@nonad.co.uk> wrote:   
   >> On 07/10/2021 08:39, Brian Gaff (Sofa) wrote:   
   >>> Yes, well, they were on sale in pound shops only 10 years ago and were   
   >>> frankly death traps.   
   >>> Brian   
   >>   
   >> Only if you either have very small fingers or a death wish and poke   
   >> wires into it whilst switched on. Modern ones for the last couple of   
   >> decades have all the lamps in insulated plastic plugs.   
   >>   
   >> Old style screw ones had threaded brass at potentially mains voltage.   
   >   
   > Surely not when they were wired is series? In a string of 20 bulbs there   
   > would be at most 240/19 volts (I think).  Or are you suggesting that this   
   > is the case when all the bulbs have gone short circuit?   
   It is the case if one bulb has gone open circuit for all bulbs   
   'upstream' of the break..   
   >   
   >> In   
   >> theory it should blow the fuse bulb in the live line to isolate it but   
   >> that isn't always the case if plugs are incorrectly wired.   
   >>   
   >> People changing bulbs with the mains still on deserve a Darwin Award.   
   >   
   > Always did it that way. Swapping all the bulbs sequentially with a new bulb   
   > was the easiest way to find the duff one.   
   >   
   It was, sadly.   
      
   Now all LED....   
   > Tim   
   >   
      
      
   --   
   Renewable energy: Expensive solutions that don't work to a problem that   
   doesn't exist instituted by self legalising protection rackets that   
   don't protect,  masquerading as public servants who don't serve the public.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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