In the US the transformers on the poles outside the houses run one phase of the
three-phase high voltage transmission lines through the primary coil to ground.
The secondary coil(s) of this transformer can be thought of as a single
center-tapped winding. The center tap is called neutral and is grounded at the
breaker box inside the house. The ends of the winding are called "hot black"
and "hot red" as both are hot compared to ground. While most of the hot wires
in the house are with black insulation, where there are both hots together the
second hot, 180 degrees out of phase with the first, is carried by a wire with
red insulation.
The 120 vac loads are connected between the hots and the neutral with an
attempt to more-or-less evenly divide the loads in the house between the red
and the black hots. 240 vac loads are connected between the red and the black
hots.
The neutral wire is white and the equipment grounding wires are either bare or
green.
Norm
S/V Bandersnatch
Lying Julington Creek
30 07.695N 081 38.484W
----- Original Message -----
From:
To: [email protected]
Sent: 3/12/2009 9:17:06 AM
Subject: Re: [Liveaboard] Euro electricity
In the US, what is the typical distribution line voltage that is running on 2
wire feeds and is it single phase? If a generator is putting out 3 phase, is
the distribution on 2 wires one leg of that? You would have to have a wire for
each phase would you not? Otherwise, they would add or subtract from
overlapping correct? Could some talk us through the process from the generator
to the house (boat)
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