In article ,
dennis@home wrote:
Snag is light switches don't normally have a neutral available. The
type which is on with the light off gets the neutral via the light -
since it only takes a small current, the lightbulb looks like a short
to it and thus provides the return. I suppose you could run a small
neon to earth - since this is no worse than many SMPS do. But don't
tell anyone I suggested this.

As long as the rcd, if present, doesn't trip.

It won't from a neon alone - they take near zero current. Otherwise neon
screwdrivers would be a tad dangerous. IIRC, of the order of 1-2 mA. Less
than many SMPS dump onto the earth.

--
*A picture may be worth a thousand words, but it uses up a thousand times more memory.

Dave Plowman London SW
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