Hi Tania:
> For example, I always thought that it was a perfectly ridiculous idea to
> require that all equipment falling under the scope of IEC 950 should be
> double insulated, as pushed by certain Nordic countries many ages ago.
> Until--- until it was pointed out to me that certain Nordic countries have a
> heck of a time finding a reliable ground connection in permafrost. I no
> longer think that this is a ridiculous idea;-- I am just grateful that we
> still have choice in IEC 60950.
That's not the only reason...
Norway uses the IT power distribution system; nothing
wrong with that.
But, not all Norwegian outlets include a ground contact.
A few years ago, I was at NEMKO in Oslo for a meeting.
The NEMKO main meeting room has two-wire outlets! (Their
labs have grounding-type outlets.)
When I lived in Spain, my NEW condo (1994) had BOTH
grounding and two-wire outlets, depending on location.
The outlets that were optimally positioned for lamps
were two-wire; all of the rest were grounding. Unlike
the USA, the two-wire outlets in both NEMKO and my
condo accept grounding-type plugs.
Two-wire outlets commonly exist in homes throughout the
world. For this reason, our grounded products are also
double-insulated. (The ground wire is for EMC purposes,
not for safety purposes.)
Best regards,
Rich
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