Re: "Repeaters", etc.
Michael Grant <mgrant@grant.org> wrote:
> On Tue, May 28, 2024 at 06:11:48PM +0100, debian-user@howorth.org.uk
> wrote:
> > Most houses in the UK are wired to a single phase, so everything is
> > connected together at the consumer unit and powerline works just
> > fine. If you have a specific problem, then there are DIN rail
> > powerline units designed specifically to be mounted in the CU to
> > spread the signal better over ALL the circuits.
> >
> > If your house has 3-phase wiring, which is unusual in the UK, then
> > you may have a problem because powerline signals do need to be on
> > the same phase.
>
> In the US, most houses are wired with 240V split-phase giving 120V to
> a mains outlet. It's a 50/50 crapshot if you are on the same leg in a
> different part of the house. I don't know if some electricians like
> to put all the mains outlets on the same leg or not. I don't know if
> these ethernet over power things will work over different legs. The
> legs share a neutral and ground, so maybe! I'd be interested to know!
>
> Similarrly, over 3-phase, I would suspect the same is true, 3
> different legs around the property with a common neutral and common
> ground.
Yes, I was talking specifically about the UK in response to Brad, who
you elided. Powerline works between 'live' and 'neutral'. Earth is
strictly a safety earth, not involved in any circuitry. The distribution
of phases in a 3-phase installation varies quite a lot depending on the
peculiarities of the particular site. The main concern is to make it
impossible to easily mix phases (i.e. don't have sockets on one phase
near sockets on another phase). I gather the rules are somewhat
different in the US with split phase systems.
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