User Tag List

Page 5 of 5 FirstFirst ... 3 4 5
Results 41 to 42 of 42

Thread: 60-0-60 Balanced power system

  1. #41
    Join Date
    Mar 2003
    Location
    Vermont
    Posts
    2,264
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by mbrooke View Post
    Think of us as a TN-C world in much need of TN-S, but stubborn thanks to (cough POCOs cough) who don't like running more conductors then that which gets the lights lit. And wants the customer paying for the earth electrodes.


    The soviet union and much of far eastern Europe had TN-C right up to the socket outlets until the mid 90s. It seemed like a good idea- I mean why waste money on an extra conductor? That is until a failing connection burnt itself open- putting 220 volts on every metal frame on that circuit. Enough of an issue that it influenced the way splices were made:


    https://youtu.be/KgOKhfVON4Y?t=317


    A "good" set of splices:


    https://youtu.be/udzayPc9mME?t=358
    Quote Originally Posted by ritelec View Post
    I have a furman monster (currently boxed up), it's a plug in unit. 120v. The line in ground pin of the plug is common to the chassis. The ground on the secondary is floating. to a gfci receptacle.

    I originally mounted it to the rails of the rack with all the all the other equipment installed ... audio hummed and buzzed away.. realized what was going on, Isolated the monster chassis from the rails and silence.

    kept distance between house ground and equipment..

    probably dangerous, but silent...

    (sitting in a box now, it's real silent now)
    So maybe Mr Furman could do lunch with the poco's?

    Or maybe the poco's should consider our NEC250.32B's modern (i forget the cycle) update of isolation?

    On all my farm jobs they (the poco) eventually advise / install an isolative xfomer, meanwhile i'm bonding anything and everything that doesn't move so the herd of bovine resistors can trade notes with all the crows on the poco wires....

    Then there's all the M.E.N. sytems in what little industry we've left around. Some of it may be antiquated , yet the same art 230/250/450 NEC applies pursuant to an entire structure assuming different potential juxtaposed to distances and loads.
    Most of it went w/out note, until the digital age decended w/all it's sensitive electronics



    equopotential takes on a certain perspective , when the potential is always there.....

    art 230, 250, 547, 640, 645, 646 , 647, 680 all start to read the same in the sense of theory addressing it

    ~RJ~

  2. #42
    Join Date
    Jan 2011
    Location
    United States
    Posts
    8,847
    Mentioned
    1 Post(s)
    Tagged
    1 Thread(s)
    Quote Originally Posted by romex jockey View Post
    So maybe Mr Furman could do lunch with the poco's?

    Or maybe the poco's should consider our NEC250.32B's modern (i forget the cycle) update of isolation?
    Nothing short of a law will change things. Its time the NESC starts taking it seriously, but thats a difficult pitched. POCOs guys are on the board, so its not in there interest.


    On all my farm jobs they (the poco) eventually advise / install an isolative xfomer, meanwhile i'm bonding anything and everything that doesn't move so the herd of bovine resistors can trade notes with all the crows on the poco wires....
    Isolative transformer or ronk blocker?

    https://ronkelectrical.com/blocker-s...e-isolator.php


    Then there's all the M.E.N. sytems in what little industry we've left around. Some of it may be antiquated , yet the same art 230/250/450 NEC applies pursuant to an entire structure assuming different potential juxtaposed to distances and loads.
    Most of it went w/out note, until the digital age decended w/all it's sensitive electronics

    Sadly even in the old days you had stray voltage on dairy farms, only getting worse as loads increase.


    equopotential takes on a certain perspective , when the potential is always there.....

    art 230, 250, 547, 640, 645, 646 , 647, 680 all start to read the same in the sense of theory addressing it

    ~RJ~
    Yup. In the end you end up with material.
    Sane people cannot survive being witness to insanity.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •