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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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