reverse polarity

Discussion in 'OnBoard Electronics & Controls' started by josefa, Jun 29, 2007.

  1. Bglad
    Joined: May 2010
    Posts: 175
    Likes: 5, Points: 18, Legacy Rep: 67
    Location: Jacksonville, Florida

    Bglad Senior Member

    Have another go at reading Marshmat's post #12 he has it right. Don't worry about your generator since all the current is inboard it is appropriate to have the green ground and neutral connected. Usually the transfer switch takes care of separating the two when you switch between ship and shore power whether manual or automatic.
     
  2. Lt. Kludge
    Joined: Jul 2010
    Posts: 18
    Likes: 1, Points: 0, Legacy Rep: 23
    Location: Massachusetts, USA

    Lt. Kludge Junior Member


    For TN-S Electric Distribution systems Yes. But for other systems such as the IT (being phased out from parts of Europe) The voltage/current from "Neutral" conductor to ground can be lethal.

    Many Electrical Safety Standards today are migrating to the view that with regard to electric shock hazard, the neutral conductor is treated as a phase conductor.
     

  3. Verytricky
    Joined: Oct 2005
    Posts: 248
    Likes: 17, Points: 0, Legacy Rep: 400
    Location: London

    Verytricky Large Member

    I have been around for quite a few years, and I have never come accross an IT system anywhere in Spain, Germany, UK or South Africa. All have been TN systems, usually TN-S, occasionally ( like in my current house ) TN-C.

    Most offices in my area are TN-C-S.

    Some high tech offices are TT, and most computer centers are TT with RCD.

    I dont think IT systems are even legal in the EU. Even the very very old EU standards prevented an IT system from being installed.


    I believe Australia and Newzealand use TN-C as their 'standard' ( PME system )
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.