RE: [OT] Low voltage kitchen lighting

["Richard \(lists account\)" <rich_lists@xxxxxxxxxx>]

They all have isolation between the primary and secondary if they are
sold
to be used on down lights etc.



The only non isolated ones i have found were built into some crap table
lamps and were only driving 5 watts a piece as well.



But IME switching the output of an electronic transformer leads to unhappy
outcomes, they shut down when you attach a cold filament to them and then
ramp up so turning on one lamp will make all go out briefly.



But magnetic transformers don't have any regulation so on high line voltage
you pop lamps, and on low you get less light out.







From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
Tracey Gardner
Sent: Monday, 12 October 2009 2:22 a.m.
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] [OT] Low voltage kitchen lighting





What's the betting that Tim's "transformers" aren't really
transformers at
all so won't be double wound?

Tracey

> 3. Ensure that the transformer is a proper double wound device with a
> fully
> isolated secondary, in case little fingers manage to find a way to
touch
> the
> 12V wiring.





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