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British Line and Netural Conventions?

Discussion in 'Electronic Design' started by Ira Rubinson, May 13, 2007.

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  1. Ira Rubinson

    Ira Rubinson Guest

    Thanks Homer.
    Your explanation makes sense.
    The unit works but I thought it was peculiar that neutral is fused and that
    the limit switch circuit conducts neutral. When connected to a US 120VAC
    wall receptacle, a blue wire on the machine connects to the right pin (hot)
    on the receptacle and a brown wire on the machine connects to the left pin
    (neutral) on the receptacle.

    -Ira
     
  2. Eeyore

    Eeyore Guest

    It's wrong !

    Yes, it's miswired . Blue = neutral and Brown = live. You should correct the
    miswiring really. Who did that ?

    Graham
     
  3. Ira Rubinson

    Ira Rubinson Guest

    This machine also has an AC gear motor with 2 white wires and a bluish-grey
    curly wire. One of the white wires is disconnected but the motor turns. Do
    you know the significance of the curly wire?


    Thanks -Ira
     
  4. That's the new color code for Europe but Brown is hot and Blue is cold. You
    need to switch them.
     
  5. Is there a capacitor? The other white wire may be for a different voltage or
    for reverse. I'd assume white is hot.
     
  6. Ira Rubinson

    Ira Rubinson Guest

    Was it really re-wired? It has a typical AC receptacle of the type you see
    on PCs and peripherals. It worked for many years. I was replacing the DC
    motor controller when I encountered the peculiar wiring. Note that this unit
    has 2 motors. One is AC for mixing the slurry and one is DC for the turn
    table. I mention this because I posted another question concerning the curly
    wire on the AC motor.
     
  7. Eeyore

    Eeyore Guest

    The 'IEC plug' presumably ?
    http://www.bulgin.co.uk/Products/IEC_Connectors/iec_images/PX058-28_400px.jpg

    These should be wired according to the standard which clearly states which is
    live and which is neutral. The plug and receptacle usually have L N and E (for
    Earth) clearly embossed in the plastic moulding.

    Is the cable feeding it miswired perhaps ?

    Graham
     
  8. contrex

    contrex Guest

    (1) Europe is not a country
    (2) In Great Britain, a country in Europe, the live pin is the bottom
    right hand one (of three) in the outlet.
     
  9. In the UK (possible Europe too), since the 1950s or even earlier, it has
    been:

    Red = H.T
    Yellow = Anode
    Purple = Screen grid (I think)
    Green = Control grid
    White = Cathode
    Black = Chassis
    Grey = Negative bias or feedback or A.G.C.
    Brown twisted = heaters (well tucked into the corner of the chassis)
    Yellow & black twisted = Loudspeaker
    Red & black twisted = Mains
    Blue & white twisted = 600 ohm balanced line
     


  10. You should be asking these questions on

    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
  11. Nick Mueller

    Nick Mueller Guest

    At least in Germany, black is hot (death = black), blue is neutral ("cold").
    PE is yellow/green.

    Red is *very* old and no longer used. And I don't remember how it was.

    With 3 phases, brown is hot too (1 brown, 2 black, 1 blue + PE).

    Nick
     
  12. Gary Tait

    Gary Tait Guest

    You have to know that IEC is "backwards" compared to a US recepticle.
    Looking at an IEC socket with earth down, hot is to the left, and Neutral
    to the right.
     
  13. Eeyore

    Eeyore Guest

    I don't care who thinks it's backwards.

    There's a standard for wiring IEC plugs and sockets and the letters L, N and E
    are embossed in the plastic. There's no excuse for mistakes.

    Graham
     
  14. Did I say it was? The United States is a collection of states.
    It's just upside down from normal.
     
  15. Gibbo

    Gibbo Guest

    Everyone else's is upside down :)
     
  16. John Larkin

    John Larkin Guest

    Left/right? In San Francisco, sockets in commercial buildings are
    wired with the ground pin up, and for residential it's down.

    John
     
  17. contrex

    contrex Guest

     
  18. Go pick nits - off your dick.
     
  19. John Larkin

    John Larkin Guest

    Ah, more of the famous Canadian civility.

    John
     
  20. Chuck

    Chuck Guest


    The NEC doesn't specify whether it
    should be up or down. That is left to
    local codes, I think.

    Chuck
     
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