Re: Wireless home LAN - WiFi vs Bluetooth?
On Tue 30 Jul 2019 at 08:49:43 (-0400), Michael Stone wrote:
> On Mon, Jul 29, 2019 at 08:46:36PM -0500, David Wright wrote:
> > On Mon 29 Jul 2019 at 18:00:25 (-0400), Gene Heskett wrote:
> > > On Monday 29 July 2019 17:26:17 ghe wrote:
> > > > On 7/29/19 1:57 PM, David Wright wrote:
> > > > > Irrelevant in a domestic setting: it's illegal to have more than one
> > > > > phase in an ordinary house.
> > > >
> > > > FYI, and significantly OT:
> > > >
> > > > I don't think that's true in the US.
> >
> > IIRC Joe's in the UK. 3-phase there is lethal. 1 is bad enough.
>
> Domestic 3 phase is common in much of the world, including
> (specifically) the UK. There's nothing illegal about it, it's just
> prohibitively expensive if (as in most of the US) 3 phase isn't
> already provisioned. (E.g., in my area many people would need to eat
> the cost of more than a quarter mile of new poles and wires if they
> wanted 3 phase, and there's basically zero advantage unless you're
> trying to run industrial electric motors in your house for some
> reason.)
My observation has always been that where 3 phases reach from the
street to the cut out in the house, only one is connected to the
meter, and the others are left unconnected. Perhaps they're changing
the rules.¹ It might be safe to use another phase for something that
people have no access to, like an instant water heater, but I've
only seen that sort of arrangement in communal blocks, which is not
really domestic. Even an electric shower only takes about 40A, and
the fuse is typically 100A. But I guess in an old house with old
wiring, they might need to plumb in a special circuit.
Perhaps someone living in the UK who actually has more than one phase
in use in their home could give some details of how it's dealt with.
In Europe they do commonly have 3 phase supplies but I think that's
partly because they have lower current ratings on the phases.
I can't speak for what their wiring regulations are like, but I
suspect that only one phase is used for general wiring, with
dedicated circuits to items like ranges. Even if you were to put
different phases on different floors, you have the stairs to
consider.
¹ Ignorance of the law is no defence, but it can be expensive
to obtain something like the building regs in the UK.
Cheers,
David.
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