François Yves Le Gal wrote:

On Tue, 21 Mar 2006 00:54:44 +0200, Fella wrote:


What are "differential breakers"?


They are called Ground Fault Interrupters, GFI's or GFIC's on your side of
the Pond. They basically sense the current differnce between the live and
neutral wire and trigger if it becomes unbalanced by more than a few ma (5
ma +- 1 in the US specs).

More info : http://hyperphysics.phy-astr.gsu.edu...ctric/gfi.html





I have just heard that in these neck of the woods the neutral line is
usually tied to the ground at the supply, and that such a device (gfi)
most probably is not approved for use in this country+...

How can I check if the neutral line is tied to the ground at the suply
or not?

If it is, does it negate the dangers previously mentioned in this thread?

And even if it is, with my setup (three wire plugs to two wire outlets)
isn't phase a very important issue now?

I have this ultra tweako audiophile pal (not as ultra as SHP, but more
so a tweako then myself.. who has this pen that lights up all over
the place. He claims to find out if the phase is correct or not using
that pen, he nears the pen to the outlet for the pre-amp, for instance,
and if it lights up he claims that I should switch and it would be a big
difference in sound. I tried it a couple of times and heard nothing
different.. And the pen continued lighting up also..

Right now the all equipment is unplugged in the music room and the door
tight shut.

If Francois, or others care to answer these questions I thank thee
beforehand very many.