All the sudden "110v reverse negative polarity"

Discussion in 'The Garage' started by Ricardo Kuhn, Mar 20, 2013.

  1. D.T.

    D.T. Difficult but useful

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    What did he say about the reverse negative polarity?


    :D
    #21
  2. Ricardo Kuhn

    Ricardo Kuhn a.k.a. Mr Rico Suave

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    From what I understand, that in a house this old we did not even have "Ground" so was nothing to worry about, still he did change the wires on the outlets to "code"
    #22
  3. MJS

    MJS Long timer

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    I'll bet that loose wire was the neutral or grounded (not ground) conductor. That left the electricity looking for another path back to the transformer. The shield on the cable was it.

    Yes it was dangerous. Glad you found a good sparky to fix it.
    #23
  4. Ricardo Kuhn

    Ricardo Kuhn a.k.a. Mr Rico Suave

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    Well hopefully is fix by now, the cable come tomorrow will see what they think..
    #24
  5. PukaWai

    PukaWai Been here awhile

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    Did he check out the whole house? Many houses that old still have cloth insulated wires on ceramic standoffs that are downright scary after 90 years or so...
    #25
  6. _cy_

    _cy_ Long timer

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    [​IMG]

    [​IMG]
    #26
  7. Warin

    Warin Retired

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    Yep think that is it.

    In principle it should not matter what 'polarity' there is in the socket/plug ... neither side should be connected to anything you could touch. In principle. Some people wire 'earths' to the 'center' or 'neutral' depending what place your in. That is not safe unless wired correctly - I'd not trust it unless I checked it myself.

    Best practice is to have a separate 'earth' connection that goes to anything you can touch. And goes to 'earth' - metal pipes into the soil or bars driven into the soil.

    Good Luck with the house wiring. I've seen lead covered ceramic insulated wiring in use ... removed on sight! Probably 1920 vintage? The house also had lead plumbing pipes for water ... :eek1 .. it was ok, they were for the cistern (from the overhead flushing tank) not the drinking water.

    -------------- Don't trust that cable guy who said "reverse negative polarity" !
    #27
  8. ttpete

    ttpete Rectum Non Bustibus

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    There's a BIG difference between "neutral" and "ground". Neutral is the center tap on the 240 volt secondary winding of the pole top transformer. Ground is either the cold water pipe of the building or a ground rod driven into the soil. Never confuse the two.
    #28
  9. rapidoxidationman

    rapidoxidationman Easily trainable

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    That cold water pipe, especially in a newer home, probably was brought to you by a black poly pipe - not such a good ground conductor, even if the house is plumbed in copper...
    #29
  10. ttpete

    ttpete Rectum Non Bustibus

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    I'm sure it's metal in that old house mentioned in the thread.
    #30