In article ,
wrote:
On Tue, 05 Jan 2016 16:21:00 GMT, Harry Bloomfield
wrote:

230v filament lamps don't even exist. Harry as always!

You are of course very wrong. Any lamps intended for most of Europe
are manufactured as 230v. At one time in the UK you could buy 210,
220, 230 and 240v lamps. The reason being the variation in local
distribution voltages and filament lamps sensitivity to voltage.

Come back when you know your subject


NT

I do know my subject, but it is obviously a waste of time attempting to
explain that subject further to you.

I always check the voltage markings on lamps I purchase, to ensure they
are 240v intended for the UK market, because I often see 230v ones
intended for the EU on sale in the UK - FACT. Yes, I have been caught
out a few times. These last no time at all and are not worth the effort
of installing them.

Back in the pre 1960's you could certainly buy a variety of lamps with
voltages 210, 220, 230 and 240v. Checking the voltage required was as
important as checking the wattage of the lamp required - FACT.

After WW2 National service until he decided what work would best suit him
to my Dad assisted a buddy was starting a small electrical business. In
the end Dad decided to follow another career but a remnant from that
short stint was a carton or two of lamps. All standard bayonet connection
mainly around 40 Watts. All were the same size physically Voltages marked
on them were 12 ,24,50, 100, 200,through to 250 although by the time I
got to rifle through the boxes anything left for 200 and above was
coloured not clear which had been used. Reason for having the variations
is post war the mains was only just arriving in the area but a lot farms
had their own generators supplying different voltages. Over my growing up
years I got through most of them ,making up fittings that held lamps in
series for use in Dads sheds or 12V inspection lamps for use with
vehicles or in my first road legal vehicle an A35 van a decent interior
light in the back. The lamps were fitted into a fitting designed to hang
in a shop window as a Black and Black advert so that was double DIY
points.

The coloured ones above 200v were used up in the outside Loo where
visitors got used to it having a green or orange light and for a period
blue thus predating public bog attempts to deter drug users by 50 years.

At Cambridge, at the end of the 50s and early 60s, mains was 200v.

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