supply grounding

Discussion in 'General Electronics Chat' started by PackratKing, Jul 27, 2008.

  1. PackratKing

    Thread Starter Well-Known Member

    Jul 13, 2008
    850
    215
    Same grounding question from a different thread.

    Cascading one additional transformer, from each of the five available 120 volt secondaries of an isolation trans. - to which point should the downstream transformers primary be grounded in order to :

    1. Avoid the creation of a " hot chassis "

    2. Avoid undue heating of all coils in the arrangement.

    Should I go back to the service panel ground of the initial line supply ?

    Some of these cascaded units will be quite a distance....... max 50 ft. from the base unit, with the ability to energize the base unit from the satellite, so I need to know how many, and what size conductors to lay between sites, being my main workshop room, and the garage.

    I tend to lean towards overkill when it comes to safety, if such is possible.
     
    Last edited: Jul 28, 2008
  2. scubasteve_911

    Senior Member

    Dec 27, 2007
    1,202
    1
    "Grounding is the essence of a prior question, concerning a power supply setup in which square one, is one of the isolation transformers mentioned in a former thread."

    huh ?

    I'm seriously confused, you should try to avoid superfluous words in your inquiry, they seem to add to the confusion.

    Steve
     
  3. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    As long as you are using a 3 wire system you should be cool, as long as one of the wires is ground.
     
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