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Groups > linux.debian.user > #212211

Re: Wireless home LAN - WiFi vs Bluetooth?

From Joe <joe@jretrading.com>
Newsgroups linux.debian.user
Subject Re: Wireless home LAN - WiFi vs Bluetooth?
Date 2019-08-03 20:20 +0200
Message-ID <yr6Nj-5pi-1@gated-at.bofh.it> (permalink)
References (4 earlier) <ypfL3-8rM-3@gated-at.bofh.it> <ypjOF-2xz-3@gated-at.bofh.it> <ypjYl-2Bl-3@gated-at.bofh.it> <ypzA5-42E-17@gated-at.bofh.it> <yr54S-4i1-7@gated-at.bofh.it>
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On Sat, 03 Aug 2019 17:28:24 +0100
mick crane <mick.crane@gmail.com> wrote:

> On 2019-07-30 13:30, Matthew Crews wrote:
> > On 7/29/19 12:57 PM, David Wright wrote:  
> >> On Mon 29 Jul 2019 at 20:43:04 (+0100), Joe wrote:  
> >>> On Mon, 29 Jul 2019 10:26:14 -0500 John Hasler
> >>> <jhasler@newsguy.com> wrote:
> >>>   
> >>>> They don't have to be on the same branch circuit: just on the
> >>>> same "phase"[1].  There is probably a gadget available that
> >>>> bridges the signal between phases.
> >>>> 
> >>>> [1] They aren't really phases but everyone calls them that.  
> >>> 
> >>> They are in my country. 3-phase, 240V RMS each phase to neutral,
> >>> 415V RMS between phases.  
> >> 
> >> Irrelevant in a domestic setting: it's illegal to have more than
> >> one phase in an ordinary house. Houses will have one phase each,
> >> so you'll share your phase with various neighbours scattered along
> >> the street.  
> > 
> > How do you figure? In the US most 240V outlets are 3 phase, and
> > they are
> > relatively common. You need them for most ovens, washing machines,
> > and electric cars.  
> 
> I don't really understand how 3 phase motors work. Is normally wanted
> if you have some heavy equipment like a car crusher.
> As I understand each cable has 130 or something volts where the AC is 
> 120 degrees out of sinc so putting a resistance between one of the 
> cables and earth would give you just that ~130 volts.
> Somehow a 3 phase motor must get the feeds back in sinc so you get
> the 415 Volts.

A three-phase motor is pretty much three single phase motors with
a shared armature. The point about it is that the three magnetic
propulsive forces arrive in a definite order, so the motor is always
guaranteed to start and turn in the same direction every time.
Single-phase motors must use dodges like extra windings linked to
capacitors and even a partly short-circuited area of the ironwork
(shaded pole) in order to start up and run in a particular direction.
The three-phase motor doesn't need anything like this, so is
conceptually simpler.

Three phases allows lower currents in the cables than a single-phase
motor of the same power, and can run on three wires only, without the
need for a neutral wire. There's no need for any 'syncing'. In a
three-phase power system, the voltage between two phases is always the
single phase to neutral voltage multiplied by the square root of three.

https://www.raritan.com/landing/three-phase-power-explained

-- 
Joe

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Thread

Wireless home LAN - WiFi vs Bluetooth? Richard Owlett <rowlett@cloud85.net> - 2019-07-29 12:50 +0200
  Re: Wireless home LAN - WiFi vs Bluetooth? Reco <recoverym4n@enotuniq.net> - 2019-07-29 13:00 +0200
    Re: Wireless home LAN - WiFi vs Bluetooth? Richard Owlett <rowlett@cloud85.net> - 2019-07-29 14:00 +0200
      Re: Wireless home LAN - WiFi vs Bluetooth? Reco <recoverym4n@enotuniq.net> - 2019-07-29 14:50 +0200
      Re: Wireless home LAN - WiFi vs Bluetooth? Dan Ritter <dsr@randomstring.org> - 2019-07-29 15:40 +0200
        Re: Wireless home LAN - WiFi vs Bluetooth? deloptes <deloptes@gmail.com> - 2019-07-30 11:30 +0200
      Re: Wireless home LAN - WiFi vs Bluetooth? John Hasler <jhasler@newsguy.com> - 2019-07-29 16:30 +0200
        Re: Wireless home LAN - WiFi vs Bluetooth? Richard Owlett <rowlett@cloud85.net> - 2019-07-29 17:20 +0200
    Re: Wireless home LAN - WiFi vs Bluetooth? john doe <johndoe65534@mail.com> - 2019-07-29 14:10 +0200
      Re: Wireless home LAN - WiFi vs Bluetooth? Reco <recoverym4n@enotuniq.net> - 2019-07-29 15:20 +0200
      Re: Wireless home LAN - WiFi vs Bluetooth? Dan Ritter <dsr@randomstring.org> - 2019-07-29 15:40 +0200
        Re: Wireless home LAN - WiFi vs Bluetooth? Joe <joe@jretrading.com> - 2019-07-29 15:50 +0200
          Re: Wireless home LAN - WiFi vs Bluetooth? Dan Ritter <dsr@randomstring.org> - 2019-07-29 16:10 +0200
            Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-07-29 17:20 +0200
              Re: Wireless home LAN - WiFi vs Bluetooth? Dan Ritter <dsr@randomstring.org> - 2019-07-29 18:00 +0200
          Re: Wireless home LAN - WiFi vs Bluetooth? John Hasler <jhasler@newsguy.com> - 2019-07-29 16:30 +0200
          Re: Wireless home LAN - WiFi vs Bluetooth? Erik Christiansen <dvalin@internode.on.net> - 2019-07-29 16:40 +0200
        Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-07-29 16:50 +0200
        Re: Wireless home LAN - WiFi vs Bluetooth? rhkramer@gmail.com - 2019-07-30 05:00 +0200
      Re: Wireless home LAN - WiFi vs Bluetooth? John Hasler <jhasler@newsguy.com> - 2019-07-29 17:30 +0200
        Re: Wireless home LAN - WiFi vs Bluetooth? Joe <joe@jretrading.com> - 2019-07-29 21:50 +0200
          Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-07-29 22:00 +0200
            Re: Wireless home LAN - WiFi vs Bluetooth? Joe <joe@jretrading.com> - 2019-07-29 22:10 +0200
              Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-07-29 23:10 +0200
            Re: Wireless home LAN - WiFi vs Bluetooth? ghe <ghe@slsware.net> - 2019-07-29 23:30 +0200
              Re: Wireless home LAN - WiFi vs Bluetooth? Gene Heskett <gheskett@shentel.net> - 2019-07-30 00:10 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-07-30 03:50 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Joe <joe@jretrading.com> - 2019-07-30 09:00 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Erik Christiansen <dvalin@internode.on.net> - 2019-07-30 13:20 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? John Hasler <jhasler@newsguy.com> - 2019-07-30 14:50 +0200
            Re: Wireless home LAN - WiFi vs Bluetooth? Matthew Crews <mailinglists@mattcrews.com> - 2019-07-30 14:40 +0200
              Re: Wireless home LAN - WiFi vs Bluetooth? Michael Stone <mstone@debian.org> - 2019-07-30 15:00 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-07-30 21:20 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Joe <joe@jretrading.com> - 2019-07-30 21:30 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-07-31 00:30 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Michael Stone <mstone@debian.org> - 2019-07-30 21:50 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-07-31 00:30 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? "Martin McCormick" <martin.m@suddenlink.net> - 2019-08-01 14:40 +0200
              Re: Wireless home LAN - WiFi vs Bluetooth? John Hasler <jhasler@newsguy.com> - 2019-07-30 15:50 +0200
              Re: Wireless home LAN - WiFi vs Bluetooth? Gene Heskett <gheskett@shentel.net> - 2019-07-30 16:20 +0200
              Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-07-30 16:30 +0200
                3 phase power (was Re: Wireless home LAN - WiFi vs Bluetooth? rhkramer@gmail.com - 2019-07-30 17:40 +0200
                Re: 3 phase power (was Re: Wireless home LAN - WiFi vs Bluetooth? Erik Christiansen <dvalin@internode.on.net> - 2019-07-31 09:50 +0200
                Re: 3 phase power (was Re: Wireless home LAN - WiFi vs Bluetooth? Joe <joe@jretrading.com> - 2019-07-31 10:00 +0200
                Re: 3 phase power (was Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-08-01 15:50 +0200
                Re: 3 phase power (was Re: Wireless home LAN - WiFi vs Bluetooth? rhkramer@gmail.com - 2019-08-01 19:10 +0200
                Re: 3 phase power (was Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-08-01 21:50 +0200
                Re: 3 phase power (was Re: Wireless home LAN - WiFi vs Bluetooth? "James H. H. Lampert" <jamesl@touchtonecorp.com> - 2019-08-01 22:20 +0200
                Re: 3 phase power (was Re: Wireless home LAN - WiFi vs Bluetooth? Gene Heskett <gheskett@shentel.net> - 2019-08-01 23:20 +0200
              Re: Wireless home LAN - WiFi vs Bluetooth? mick crane <mick.crane@gmail.com> - 2019-08-03 18:30 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Joe <joe@jretrading.com> - 2019-08-03 20:20 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? mick crane <mick.crane@gmail.com> - 2019-08-03 21:00 +0200
        Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-07-29 23:00 +0200
      Re: Wireless home LAN - WiFi vs Bluetooth? Patrick Bartek <nemommxiv@gmail.com> - 2019-07-29 17:30 +0200
    Re: Wireless home LAN - WiFi vs Bluetooth? Celejar <celejar@gmail.com> - 2019-07-31 01:10 +0200
      Re: Wireless home LAN - WiFi vs Bluetooth? Joe <joe@jretrading.com> - 2019-07-31 09:10 +0200
        Re: Wireless home LAN - WiFi vs Bluetooth? Celejar <celejar@gmail.com> - 2019-08-02 16:20 +0200
      Re: Wireless home LAN - WiFi vs Bluetooth? Reco <recoverym4n@enotuniq.net> - 2019-07-31 09:50 +0200
        Re: Wireless home LAN - WiFi vs Bluetooth? Celejar <celejar@gmail.com> - 2019-07-31 14:00 +0200
          Re: Wireless home LAN - WiFi vs Bluetooth? Reco <recoverym4n@enotuniq.net> - 2019-07-31 15:10 +0200
            Re: Wireless home LAN - WiFi vs Bluetooth? Brian <ad44@cityscape.co.uk> - 2019-07-31 15:40 +0200
              Re: Wireless home LAN - WiFi vs Bluetooth? Reco <recoverym4n@enotuniq.net> - 2019-07-31 15:50 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Ben Caradoc-Davies <ben@transient.nz> - 2019-08-01 03:20 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Celejar <celejar@gmail.com> - 2019-08-01 04:40 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Celejar <celejar@gmail.com> - 2019-08-01 04:40 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Reco <recoverym4n@enotuniq.net> - 2019-08-01 08:20 +0200
            Re: Wireless home LAN - WiFi vs Bluetooth? Celejar <celejar@gmail.com> - 2019-08-01 04:40 +0200
              Re: Wireless home LAN - WiFi vs Bluetooth? Reco <recoverym4n@enotuniq.net> - 2019-08-01 08:40 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Andrei POPESCU <andreimpopescu@gmail.com> - 2019-08-01 08:50 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Reco <recoverym4n@enotuniq.net> - 2019-08-01 10:00 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Celejar <celejar@gmail.com> - 2019-08-02 05:20 +0200
                Re: Wireless home LAN - WiFi vs Bluetooth? Celejar <celejar@gmail.com> - 2019-08-02 05:20 +0200
      Re: Wireless home LAN - WiFi vs Bluetooth? Andrei POPESCU <andreimpopescu@gmail.com> - 2019-07-31 22:20 +0200
  Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-07-29 17:00 +0200
  Re: Wireless home LAN - WiFi vs Bluetooth? Patrick Bartek <nemommxiv@gmail.com> - 2019-07-29 17:20 +0200
    Re: Wireless home LAN - WiFi vs Bluetooth? Richard Owlett <rowlett@cloud85.net> - 2019-07-29 18:00 +0200
      PROGRESS!! - was {Re: Wireless home LAN - WiFi vs Bluetooth?} Richard Owlett <rowlett@cloud85.net> - 2019-07-29 19:00 +0200
        Re: PROGRESS!! - was {Re: Wireless home LAN - WiFi vs Bluetooth?} David Wright <deblis@lionunicorn.co.uk> - 2019-07-29 23:10 +0200
          Re: PROGRESS!! - was {Re: Wireless home LAN - WiFi vs Bluetooth?} Richard Owlett <rowlett@cloud85.net> - 2019-07-30 05:20 +0200
            Re: PROGRESS!! - was {Re: Wireless home LAN - WiFi vs Bluetooth?} David Wright <deblis@lionunicorn.co.uk> - 2019-08-03 17:50 +0200
        Re: PROGRESS!! - was {Re: Wireless home LAN - WiFi vs Bluetooth?} mick crane <mick.crane@gmail.com> - 2019-08-04 14:00 +0200
          Re: PROGRESS!! - was {Re: Wireless home LAN - WiFi vs Bluetooth?} <tomas@tuxteam.de> - 2019-08-04 14:10 +0200
            Re: PROGRESS!! - was {Re: Wireless home LAN - WiFi vs Bluetooth?} Richard Hector <richard@walnut.gen.nz> - 2019-08-04 17:20 +0200
              Re: PROGRESS!! - was {Re: Wireless home LAN - WiFi vs Bluetooth?} rhkramer@gmail.com - 2019-08-05 18:50 +0200
                Re: PROGRESS!! - was {Re: Wireless home LAN - WiFi vs Bluetooth?} David Wright <deblis@lionunicorn.co.uk> - 2019-08-05 22:00 +0200
                Re: PROGRESS!! - was {Re: Wireless home LAN - WiFi vs Bluetooth?} Andrei POPESCU <andreimpopescu@gmail.com> - 2019-08-06 07:50 +0200
                Re: PROGRESS!! - was {Re: Wireless home LAN - WiFi vs Bluetooth?} David Wright <deblis@lionunicorn.co.uk> - 2019-08-06 15:40 +0200
                Re: PROGRESS!! - was {Re: Wireless home LAN - WiFi vs Bluetooth?} Andrei POPESCU <andreimpopescu@gmail.com> - 2019-08-07 08:50 +0200
      Re: Wireless home LAN - WiFi vs Bluetooth? Patrick Bartek <nemommxiv@gmail.com> - 2019-07-29 19:10 +0200
    Re: Wireless home LAN - WiFi vs Bluetooth? David Wright <deblis@lionunicorn.co.uk> - 2019-07-29 18:40 +0200
  Useful links - was {Re: Wireless home LAN - WiFi vs Bluetooth?} Richard Owlett <rowlett@cloud85.net> - 2019-08-03 15:20 +0200
    Re: Useful links - was {Re: Wireless home LAN - WiFi vs Bluetooth?} Lee <ler762@gmail.com> - 2019-08-03 17:00 +0200
      Re: Useful links - was {Re: Wireless home LAN - WiFi vs Bluetooth?} Richard Owlett <rowlett@cloud85.net> - 2019-08-03 17:30 +0200
        Re: Useful links - was {Re: Wireless home LAN - WiFi vs Bluetooth?} David Wright <deblis@lionunicorn.co.uk> - 2019-08-03 17:50 +0200
          Re: Useful links - was {Re: Wireless home LAN - WiFi vs Bluetooth?} Brian <ad44@cityscape.co.uk> - 2019-08-03 21:20 +0200
        Re: Useful links - was {Re: Wireless home LAN - WiFi vs Bluetooth?} Andrei POPESCU <andreimpopescu@gmail.com> - 2019-08-03 18:20 +0200
    Re: Useful links - was {Re: Wireless home LAN - WiFi vs Bluetooth?} David Wright <deblis@lionunicorn.co.uk> - 2019-08-03 17:40 +0200

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