This might be a good place to say where you are located geographically
(country is enough).

The reason I say this is that homes are wired differently in Europe and
North America, and for power line network adaptors it may matter.

In Europe (at least in Germany where I was), power is 220V, 50Hz, all
the outlets in one house can reasonably be expected to be on the same
side of the first external power company transformer.

This is not true in Canada, and I expect not in the US either.

In Canada, houses are supplied with symmettric 3 wire (plus ground)
220-240V. That is, 3 wires come into the house, a Neutral (not ground),
and 2 other wires that are 180° out of phase. 110-120V to the outlets is
developed in half the house between Neutral and one phase, and in the
other half of the house between Neutral and the other phase. So you
cannot count on the two outlets you chose being in parallel. They may
be on opposite sides of the transformer winding out on the street.

I think the same is true in the US, although, frankly, when visiting
the US I don't normally poke my head in other people's electrical
entranceways, so I can't be sure. :-)

FWIW, Canadian factories are supplied with 600V 3 phase, (which is a
nice submultiple of a standard transmission voltage) and american
factories (for some reason I can't figure out) are 440V 3 phase. And
you thought we shared a common power grid?


-- 
Michaelwagner
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