Who's rewired their house for this hobby?
holm at freibergnet.de
Sun Nov 23 14:42:18 CST 2014
random832 at fastmail.us wrote:
> On Sun, Nov 23, 2014, at 10:33, Holm Tiffe wrote:
> > Hmm, not that effective ehy?
> > We also have 4 wires here, 3 phases and one neutral (Star Point)
> > After an Security Device, the RCD it gets split to 5 wires: 3 ühases, the
> > neutral and an earth line that's connected to the metal enclosure of
> > connected devices. In case of an isolation failure this prevents any
> > injury
> > of persons and the RCD will pop off the power if one of the phases put
> > more
> > than 30mA (thats common) in the eart line.
> The four wires in the US are two phases, one neutral, and one ground
> (for the enclosure). The neutral is used for single-phase components of
> the device. Older devices, with only three wires, sometimes used the
> neutral for the enclosure grounding (other times they would use the
> house's plumbing for it), which is now not allowed, specifically because
> it results in current going through the same wire used for grounding,
> which means residual current detection is impossible.
> This kind of power is called "Split phase" because "two phase" power
> refers to a different type where they are not 180 degrees apart.
Yes, I've understood.
..but I think the US should have modernized the entire System long before
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