Nightjar has brought this to us :
On 20/03/2014 21:19, Harry Bloomfield wrote:
on 20/03/2014, Nightjar supposed :
On 20/03/2014 18:42, Harry Bloomfield wrote:
After years of use, the 4 lamps in the oven needed replacement. Ibought
some from a local shop which were marked 230v and they lasted just
weeks, got another set from ebay listed as 220 - 240v which each lasted
only a week. all were marked as oven lamps, but I wasn't conviced about
that, due to the glass being very clear, rather than toughened. Very
annoying, because they are not that easy to change.

Latest set have lasted a month and were 2 for a pound from Poundland,
marked 240v on the package and on the lamp base, the glass was also
discoulored suggesting they were toughened. Better yet, they have lasted
a month so far ;-)

Try explaining to numpty sales people that 220v is very different from
the 240v in the UK :'(

We harmonised with the rest of Europe many years ago, so UK voltage is
230V +10% -6%. Anything sold within the EU for mains voltage use
should work on any voltage within that range.


Except filament lamps, which either under run at 220/230v, or are over
run and last no time at all on 240v.

There are no exceptions to the requirement. Filament lamps should be designed
to work at 253V, even if that means there is a slight loss of light output at
216V.

Colin Bignell

The difference in light output between those to voltages is quite
considerable. In the days when the UK had various mains voltages, you
could buy lamps of 210, 220, 230, 240 and I think 250v ratings.

--
Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk