19 Jul
2016
19 Jul
'16
9:53 a.m.
[...], especially since most electrical installations
(even domestic)
are 3-phase.
This, I believe, must be location-specific. In North America, it is
usual for domestic electrical feeds to be only two-phase (that is, they
are the two sides of a centre-tapped secondary - the two hot wires are
180 degrees out of phase with one another).
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