Brian Gaff wrote

I of course cannot see the pictures here, but I do recall a bodger I used
to know who decided a spotlight 12 v powered by a transformer up in the
ceiling and fed to a light on a gooseneck. was rubbish so he changed the
socket in the lamp by drilling out the rivets, then connected the two
wires in the ceiling to the mains and yes, it worked. However about a
month later there was a bang and the internal wiring shorted out.

I somehow have never been convinced that 12v wiring is up to mains
insulation standards. On the face of it the current should be less of
course,

You've got that backwards.

but the insulation and bulb heat etc need to be taken into account when
doing these things.

Yep.

I'd also have wondered about the lamp body being earthed or not. I never
found out.

Doesn’t need to be with 12V and in fact plenty of desk lamps do it like
that,
but should be with 240V lamps, except those that are double insulated.

"JoeJoe" wrote in message
o.uk...
On 12/11/2016 15:28, Dave Plowman (News) wrote:
In article ,
JoeJoe wrote:
I have quite a few of these in my kitchen, used with 50W MR16 bulbs and
transformers (one per light):

http://www.ebay.co.uk/itm/HQ-Halogen...W/112184915408

and

http://www.free-instruction-manuals....f/p4734235.pdf

According to this they are rated 12v AC, and should only be used with
MR16 bulbs.

I would like to replace the transformers + bulbs with mains GU10 LED
bulbs instead.

Any reason why this shouldn't be done?


PS: they are a pretty old model (mine were bought 10+ years ago), and
are no longer available, so well before LED downlights became
available.

The connector on an MR16 is different from a GU10. Assuming you can buy
the correct mains tails with the GU 10 connector, don't see why not.


Sorry, should have mentioned that I was going to replace the connectors
of course.